| File: | build/llvm-toolchain-snapshot-15~++20220420111733+e13d2efed663/llvm/lib/Target/X86/X86ISelLowering.cpp |
| Warning: | line 16692, column 21 The result of the '/' expression is undefined |
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| 1 | //===-- X86ISelLowering.cpp - X86 DAG Lowering Implementation -------------===// |
| 2 | // |
| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| 4 | // See https://llvm.org/LICENSE.txt for license information. |
| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| 6 | // |
| 7 | //===----------------------------------------------------------------------===// |
| 8 | // |
| 9 | // This file defines the interfaces that X86 uses to lower LLVM code into a |
| 10 | // selection DAG. |
| 11 | // |
| 12 | //===----------------------------------------------------------------------===// |
| 13 | |
| 14 | #include "X86ISelLowering.h" |
| 15 | #include "MCTargetDesc/X86ShuffleDecode.h" |
| 16 | #include "X86.h" |
| 17 | #include "X86CallingConv.h" |
| 18 | #include "X86FrameLowering.h" |
| 19 | #include "X86InstrBuilder.h" |
| 20 | #include "X86IntrinsicsInfo.h" |
| 21 | #include "X86MachineFunctionInfo.h" |
| 22 | #include "X86TargetMachine.h" |
| 23 | #include "X86TargetObjectFile.h" |
| 24 | #include "llvm/ADT/SmallBitVector.h" |
| 25 | #include "llvm/ADT/SmallSet.h" |
| 26 | #include "llvm/ADT/Statistic.h" |
| 27 | #include "llvm/ADT/StringExtras.h" |
| 28 | #include "llvm/ADT/StringSwitch.h" |
| 29 | #include "llvm/Analysis/BlockFrequencyInfo.h" |
| 30 | #include "llvm/Analysis/EHPersonalities.h" |
| 31 | #include "llvm/Analysis/ObjCARCUtil.h" |
| 32 | #include "llvm/Analysis/ProfileSummaryInfo.h" |
| 33 | #include "llvm/Analysis/VectorUtils.h" |
| 34 | #include "llvm/CodeGen/IntrinsicLowering.h" |
| 35 | #include "llvm/CodeGen/MachineFrameInfo.h" |
| 36 | #include "llvm/CodeGen/MachineFunction.h" |
| 37 | #include "llvm/CodeGen/MachineInstrBuilder.h" |
| 38 | #include "llvm/CodeGen/MachineJumpTableInfo.h" |
| 39 | #include "llvm/CodeGen/MachineLoopInfo.h" |
| 40 | #include "llvm/CodeGen/MachineModuleInfo.h" |
| 41 | #include "llvm/CodeGen/MachineRegisterInfo.h" |
| 42 | #include "llvm/CodeGen/TargetLowering.h" |
| 43 | #include "llvm/CodeGen/WinEHFuncInfo.h" |
| 44 | #include "llvm/IR/CallingConv.h" |
| 45 | #include "llvm/IR/Constants.h" |
| 46 | #include "llvm/IR/DerivedTypes.h" |
| 47 | #include "llvm/IR/DiagnosticInfo.h" |
| 48 | #include "llvm/IR/Function.h" |
| 49 | #include "llvm/IR/GlobalAlias.h" |
| 50 | #include "llvm/IR/GlobalVariable.h" |
| 51 | #include "llvm/IR/IRBuilder.h" |
| 52 | #include "llvm/IR/Instructions.h" |
| 53 | #include "llvm/IR/Intrinsics.h" |
| 54 | #include "llvm/IR/PatternMatch.h" |
| 55 | #include "llvm/MC/MCAsmInfo.h" |
| 56 | #include "llvm/MC/MCContext.h" |
| 57 | #include "llvm/MC/MCExpr.h" |
| 58 | #include "llvm/MC/MCSymbol.h" |
| 59 | #include "llvm/Support/CommandLine.h" |
| 60 | #include "llvm/Support/Debug.h" |
| 61 | #include "llvm/Support/ErrorHandling.h" |
| 62 | #include "llvm/Support/KnownBits.h" |
| 63 | #include "llvm/Support/MathExtras.h" |
| 64 | #include "llvm/Target/TargetOptions.h" |
| 65 | #include <algorithm> |
| 66 | #include <bitset> |
| 67 | #include <cctype> |
| 68 | #include <numeric> |
| 69 | using namespace llvm; |
| 70 | |
| 71 | #define DEBUG_TYPE"x86-isel" "x86-isel" |
| 72 | |
| 73 | STATISTIC(NumTailCalls, "Number of tail calls")static llvm::Statistic NumTailCalls = {"x86-isel", "NumTailCalls" , "Number of tail calls"}; |
| 74 | |
| 75 | static cl::opt<int> ExperimentalPrefInnermostLoopAlignment( |
| 76 | "x86-experimental-pref-innermost-loop-alignment", cl::init(4), |
| 77 | cl::desc( |
| 78 | "Sets the preferable loop alignment for experiments (as log2 bytes) " |
| 79 | "for innermost loops only. If specified, this option overrides " |
| 80 | "alignment set by x86-experimental-pref-loop-alignment."), |
| 81 | cl::Hidden); |
| 82 | |
| 83 | static cl::opt<bool> MulConstantOptimization( |
| 84 | "mul-constant-optimization", cl::init(true), |
| 85 | cl::desc("Replace 'mul x, Const' with more effective instructions like " |
| 86 | "SHIFT, LEA, etc."), |
| 87 | cl::Hidden); |
| 88 | |
| 89 | static cl::opt<bool> ExperimentalUnorderedISEL( |
| 90 | "x86-experimental-unordered-atomic-isel", cl::init(false), |
| 91 | cl::desc("Use LoadSDNode and StoreSDNode instead of " |
| 92 | "AtomicSDNode for unordered atomic loads and " |
| 93 | "stores respectively."), |
| 94 | cl::Hidden); |
| 95 | |
| 96 | /// Call this when the user attempts to do something unsupported, like |
| 97 | /// returning a double without SSE2 enabled on x86_64. This is not fatal, unlike |
| 98 | /// report_fatal_error, so calling code should attempt to recover without |
| 99 | /// crashing. |
| 100 | static void errorUnsupported(SelectionDAG &DAG, const SDLoc &dl, |
| 101 | const char *Msg) { |
| 102 | MachineFunction &MF = DAG.getMachineFunction(); |
| 103 | DAG.getContext()->diagnose( |
| 104 | DiagnosticInfoUnsupported(MF.getFunction(), Msg, dl.getDebugLoc())); |
| 105 | } |
| 106 | |
| 107 | X86TargetLowering::X86TargetLowering(const X86TargetMachine &TM, |
| 108 | const X86Subtarget &STI) |
| 109 | : TargetLowering(TM), Subtarget(STI) { |
| 110 | bool UseX87 = !Subtarget.useSoftFloat() && Subtarget.hasX87(); |
| 111 | MVT PtrVT = MVT::getIntegerVT(TM.getPointerSizeInBits(0)); |
| 112 | |
| 113 | // Set up the TargetLowering object. |
| 114 | |
| 115 | // X86 is weird. It always uses i8 for shift amounts and setcc results. |
| 116 | setBooleanContents(ZeroOrOneBooleanContent); |
| 117 | // X86-SSE is even stranger. It uses -1 or 0 for vector masks. |
| 118 | setBooleanVectorContents(ZeroOrNegativeOneBooleanContent); |
| 119 | |
| 120 | // For 64-bit, since we have so many registers, use the ILP scheduler. |
| 121 | // For 32-bit, use the register pressure specific scheduling. |
| 122 | // For Atom, always use ILP scheduling. |
| 123 | if (Subtarget.isAtom()) |
| 124 | setSchedulingPreference(Sched::ILP); |
| 125 | else if (Subtarget.is64Bit()) |
| 126 | setSchedulingPreference(Sched::ILP); |
| 127 | else |
| 128 | setSchedulingPreference(Sched::RegPressure); |
| 129 | const X86RegisterInfo *RegInfo = Subtarget.getRegisterInfo(); |
| 130 | setStackPointerRegisterToSaveRestore(RegInfo->getStackRegister()); |
| 131 | |
| 132 | // Bypass expensive divides and use cheaper ones. |
| 133 | if (TM.getOptLevel() >= CodeGenOpt::Default) { |
| 134 | if (Subtarget.hasSlowDivide32()) |
| 135 | addBypassSlowDiv(32, 8); |
| 136 | if (Subtarget.hasSlowDivide64() && Subtarget.is64Bit()) |
| 137 | addBypassSlowDiv(64, 32); |
| 138 | } |
| 139 | |
| 140 | // Setup Windows compiler runtime calls. |
| 141 | if (Subtarget.isTargetWindowsMSVC() || Subtarget.isTargetWindowsItanium()) { |
| 142 | static const struct { |
| 143 | const RTLIB::Libcall Op; |
| 144 | const char * const Name; |
| 145 | const CallingConv::ID CC; |
| 146 | } LibraryCalls[] = { |
| 147 | { RTLIB::SDIV_I64, "_alldiv", CallingConv::X86_StdCall }, |
| 148 | { RTLIB::UDIV_I64, "_aulldiv", CallingConv::X86_StdCall }, |
| 149 | { RTLIB::SREM_I64, "_allrem", CallingConv::X86_StdCall }, |
| 150 | { RTLIB::UREM_I64, "_aullrem", CallingConv::X86_StdCall }, |
| 151 | { RTLIB::MUL_I64, "_allmul", CallingConv::X86_StdCall }, |
| 152 | }; |
| 153 | |
| 154 | for (const auto &LC : LibraryCalls) { |
| 155 | setLibcallName(LC.Op, LC.Name); |
| 156 | setLibcallCallingConv(LC.Op, LC.CC); |
| 157 | } |
| 158 | } |
| 159 | |
| 160 | if (Subtarget.getTargetTriple().isOSMSVCRT()) { |
| 161 | // MSVCRT doesn't have powi; fall back to pow |
| 162 | setLibcallName(RTLIB::POWI_F32, nullptr); |
| 163 | setLibcallName(RTLIB::POWI_F64, nullptr); |
| 164 | } |
| 165 | |
| 166 | // If we don't have cmpxchg8b(meaing this is a 386/486), limit atomic size to |
| 167 | // 32 bits so the AtomicExpandPass will expand it so we don't need cmpxchg8b. |
| 168 | // FIXME: Should we be limiting the atomic size on other configs? Default is |
| 169 | // 1024. |
| 170 | if (!Subtarget.canUseCMPXCHG8B()) |
| 171 | setMaxAtomicSizeInBitsSupported(32); |
| 172 | |
| 173 | // Set up the register classes. |
| 174 | addRegisterClass(MVT::i8, &X86::GR8RegClass); |
| 175 | addRegisterClass(MVT::i16, &X86::GR16RegClass); |
| 176 | addRegisterClass(MVT::i32, &X86::GR32RegClass); |
| 177 | if (Subtarget.is64Bit()) |
| 178 | addRegisterClass(MVT::i64, &X86::GR64RegClass); |
| 179 | |
| 180 | for (MVT VT : MVT::integer_valuetypes()) |
| 181 | setLoadExtAction(ISD::SEXTLOAD, VT, MVT::i1, Promote); |
| 182 | |
| 183 | // We don't accept any truncstore of integer registers. |
| 184 | setTruncStoreAction(MVT::i64, MVT::i32, Expand); |
| 185 | setTruncStoreAction(MVT::i64, MVT::i16, Expand); |
| 186 | setTruncStoreAction(MVT::i64, MVT::i8 , Expand); |
| 187 | setTruncStoreAction(MVT::i32, MVT::i16, Expand); |
| 188 | setTruncStoreAction(MVT::i32, MVT::i8 , Expand); |
| 189 | setTruncStoreAction(MVT::i16, MVT::i8, Expand); |
| 190 | |
| 191 | setTruncStoreAction(MVT::f64, MVT::f32, Expand); |
| 192 | |
| 193 | // SETOEQ and SETUNE require checking two conditions. |
| 194 | for (auto VT : {MVT::f32, MVT::f64, MVT::f80}) { |
| 195 | setCondCodeAction(ISD::SETOEQ, VT, Expand); |
| 196 | setCondCodeAction(ISD::SETUNE, VT, Expand); |
| 197 | } |
| 198 | |
| 199 | // Integer absolute. |
| 200 | if (Subtarget.canUseCMOV()) { |
| 201 | setOperationAction(ISD::ABS , MVT::i16 , Custom); |
| 202 | setOperationAction(ISD::ABS , MVT::i32 , Custom); |
| 203 | if (Subtarget.is64Bit()) |
| 204 | setOperationAction(ISD::ABS , MVT::i64 , Custom); |
| 205 | } |
| 206 | |
| 207 | // Signed saturation subtraction. |
| 208 | setOperationAction(ISD::SSUBSAT , MVT::i8 , Custom); |
| 209 | setOperationAction(ISD::SSUBSAT , MVT::i16 , Custom); |
| 210 | setOperationAction(ISD::SSUBSAT , MVT::i32 , Custom); |
| 211 | if (Subtarget.is64Bit()) |
| 212 | setOperationAction(ISD::SSUBSAT , MVT::i64 , Custom); |
| 213 | |
| 214 | // Funnel shifts. |
| 215 | for (auto ShiftOp : {ISD::FSHL, ISD::FSHR}) { |
| 216 | // For slow shld targets we only lower for code size. |
| 217 | LegalizeAction ShiftDoubleAction = Subtarget.isSHLDSlow() ? Custom : Legal; |
| 218 | |
| 219 | setOperationAction(ShiftOp , MVT::i8 , Custom); |
| 220 | setOperationAction(ShiftOp , MVT::i16 , Custom); |
| 221 | setOperationAction(ShiftOp , MVT::i32 , ShiftDoubleAction); |
| 222 | if (Subtarget.is64Bit()) |
| 223 | setOperationAction(ShiftOp , MVT::i64 , ShiftDoubleAction); |
| 224 | } |
| 225 | |
| 226 | if (!Subtarget.useSoftFloat()) { |
| 227 | // Promote all UINT_TO_FP to larger SINT_TO_FP's, as X86 doesn't have this |
| 228 | // operation. |
| 229 | setOperationAction(ISD::UINT_TO_FP, MVT::i8, Promote); |
| 230 | setOperationAction(ISD::STRICT_UINT_TO_FP, MVT::i8, Promote); |
| 231 | setOperationAction(ISD::UINT_TO_FP, MVT::i16, Promote); |
| 232 | setOperationAction(ISD::STRICT_UINT_TO_FP, MVT::i16, Promote); |
| 233 | // We have an algorithm for SSE2, and we turn this into a 64-bit |
| 234 | // FILD or VCVTUSI2SS/SD for other targets. |
| 235 | setOperationAction(ISD::UINT_TO_FP, MVT::i32, Custom); |
| 236 | setOperationAction(ISD::STRICT_UINT_TO_FP, MVT::i32, Custom); |
| 237 | // We have an algorithm for SSE2->double, and we turn this into a |
| 238 | // 64-bit FILD followed by conditional FADD for other targets. |
| 239 | setOperationAction(ISD::UINT_TO_FP, MVT::i64, Custom); |
| 240 | setOperationAction(ISD::STRICT_UINT_TO_FP, MVT::i64, Custom); |
| 241 | |
| 242 | // Promote i8 SINT_TO_FP to larger SINT_TO_FP's, as X86 doesn't have |
| 243 | // this operation. |
| 244 | setOperationAction(ISD::SINT_TO_FP, MVT::i8, Promote); |
| 245 | setOperationAction(ISD::STRICT_SINT_TO_FP, MVT::i8, Promote); |
| 246 | // SSE has no i16 to fp conversion, only i32. We promote in the handler |
| 247 | // to allow f80 to use i16 and f64 to use i16 with sse1 only |
| 248 | setOperationAction(ISD::SINT_TO_FP, MVT::i16, Custom); |
| 249 | setOperationAction(ISD::STRICT_SINT_TO_FP, MVT::i16, Custom); |
| 250 | // f32 and f64 cases are Legal with SSE1/SSE2, f80 case is not |
| 251 | setOperationAction(ISD::SINT_TO_FP, MVT::i32, Custom); |
| 252 | setOperationAction(ISD::STRICT_SINT_TO_FP, MVT::i32, Custom); |
| 253 | // In 32-bit mode these are custom lowered. In 64-bit mode F32 and F64 |
| 254 | // are Legal, f80 is custom lowered. |
| 255 | setOperationAction(ISD::SINT_TO_FP, MVT::i64, Custom); |
| 256 | setOperationAction(ISD::STRICT_SINT_TO_FP, MVT::i64, Custom); |
| 257 | |
| 258 | // Promote i8 FP_TO_SINT to larger FP_TO_SINTS's, as X86 doesn't have |
| 259 | // this operation. |
| 260 | setOperationAction(ISD::FP_TO_SINT, MVT::i8, Promote); |
| 261 | // FIXME: This doesn't generate invalid exception when it should. PR44019. |
| 262 | setOperationAction(ISD::STRICT_FP_TO_SINT, MVT::i8, Promote); |
| 263 | setOperationAction(ISD::FP_TO_SINT, MVT::i16, Custom); |
| 264 | setOperationAction(ISD::STRICT_FP_TO_SINT, MVT::i16, Custom); |
| 265 | setOperationAction(ISD::FP_TO_SINT, MVT::i32, Custom); |
| 266 | setOperationAction(ISD::STRICT_FP_TO_SINT, MVT::i32, Custom); |
| 267 | // In 32-bit mode these are custom lowered. In 64-bit mode F32 and F64 |
| 268 | // are Legal, f80 is custom lowered. |
| 269 | setOperationAction(ISD::FP_TO_SINT, MVT::i64, Custom); |
| 270 | setOperationAction(ISD::STRICT_FP_TO_SINT, MVT::i64, Custom); |
| 271 | |
| 272 | // Handle FP_TO_UINT by promoting the destination to a larger signed |
| 273 | // conversion. |
| 274 | setOperationAction(ISD::FP_TO_UINT, MVT::i8, Promote); |
| 275 | // FIXME: This doesn't generate invalid exception when it should. PR44019. |
| 276 | setOperationAction(ISD::STRICT_FP_TO_UINT, MVT::i8, Promote); |
| 277 | setOperationAction(ISD::FP_TO_UINT, MVT::i16, Promote); |
| 278 | // FIXME: This doesn't generate invalid exception when it should. PR44019. |
| 279 | setOperationAction(ISD::STRICT_FP_TO_UINT, MVT::i16, Promote); |
| 280 | setOperationAction(ISD::FP_TO_UINT, MVT::i32, Custom); |
| 281 | setOperationAction(ISD::STRICT_FP_TO_UINT, MVT::i32, Custom); |
| 282 | setOperationAction(ISD::FP_TO_UINT, MVT::i64, Custom); |
| 283 | setOperationAction(ISD::STRICT_FP_TO_UINT, MVT::i64, Custom); |
| 284 | |
| 285 | setOperationAction(ISD::LRINT, MVT::f32, Custom); |
| 286 | setOperationAction(ISD::LRINT, MVT::f64, Custom); |
| 287 | setOperationAction(ISD::LLRINT, MVT::f32, Custom); |
| 288 | setOperationAction(ISD::LLRINT, MVT::f64, Custom); |
| 289 | |
| 290 | if (!Subtarget.is64Bit()) { |
| 291 | setOperationAction(ISD::LRINT, MVT::i64, Custom); |
| 292 | setOperationAction(ISD::LLRINT, MVT::i64, Custom); |
| 293 | } |
| 294 | } |
| 295 | |
| 296 | if (Subtarget.hasSSE2()) { |
| 297 | // Custom lowering for saturating float to int conversions. |
| 298 | // We handle promotion to larger result types manually. |
| 299 | for (MVT VT : { MVT::i8, MVT::i16, MVT::i32 }) { |
| 300 | setOperationAction(ISD::FP_TO_UINT_SAT, VT, Custom); |
| 301 | setOperationAction(ISD::FP_TO_SINT_SAT, VT, Custom); |
| 302 | } |
| 303 | if (Subtarget.is64Bit()) { |
| 304 | setOperationAction(ISD::FP_TO_UINT_SAT, MVT::i64, Custom); |
| 305 | setOperationAction(ISD::FP_TO_SINT_SAT, MVT::i64, Custom); |
| 306 | } |
| 307 | } |
| 308 | |
| 309 | // Handle address space casts between mixed sized pointers. |
| 310 | setOperationAction(ISD::ADDRSPACECAST, MVT::i32, Custom); |
| 311 | setOperationAction(ISD::ADDRSPACECAST, MVT::i64, Custom); |
| 312 | |
| 313 | // TODO: when we have SSE, these could be more efficient, by using movd/movq. |
| 314 | if (!Subtarget.hasSSE2()) { |
| 315 | setOperationAction(ISD::BITCAST , MVT::f32 , Expand); |
| 316 | setOperationAction(ISD::BITCAST , MVT::i32 , Expand); |
| 317 | if (Subtarget.is64Bit()) { |
| 318 | setOperationAction(ISD::BITCAST , MVT::f64 , Expand); |
| 319 | // Without SSE, i64->f64 goes through memory. |
| 320 | setOperationAction(ISD::BITCAST , MVT::i64 , Expand); |
| 321 | } |
| 322 | } else if (!Subtarget.is64Bit()) |
| 323 | setOperationAction(ISD::BITCAST , MVT::i64 , Custom); |
| 324 | |
| 325 | // Scalar integer divide and remainder are lowered to use operations that |
| 326 | // produce two results, to match the available instructions. This exposes |
| 327 | // the two-result form to trivial CSE, which is able to combine x/y and x%y |
| 328 | // into a single instruction. |
| 329 | // |
| 330 | // Scalar integer multiply-high is also lowered to use two-result |
| 331 | // operations, to match the available instructions. However, plain multiply |
| 332 | // (low) operations are left as Legal, as there are single-result |
| 333 | // instructions for this in x86. Using the two-result multiply instructions |
| 334 | // when both high and low results are needed must be arranged by dagcombine. |
| 335 | for (auto VT : { MVT::i8, MVT::i16, MVT::i32, MVT::i64 }) { |
| 336 | setOperationAction(ISD::MULHS, VT, Expand); |
| 337 | setOperationAction(ISD::MULHU, VT, Expand); |
| 338 | setOperationAction(ISD::SDIV, VT, Expand); |
| 339 | setOperationAction(ISD::UDIV, VT, Expand); |
| 340 | setOperationAction(ISD::SREM, VT, Expand); |
| 341 | setOperationAction(ISD::UREM, VT, Expand); |
| 342 | } |
| 343 | |
| 344 | setOperationAction(ISD::BR_JT , MVT::Other, Expand); |
| 345 | setOperationAction(ISD::BRCOND , MVT::Other, Custom); |
| 346 | for (auto VT : { MVT::f32, MVT::f64, MVT::f80, MVT::f128, |
| 347 | MVT::i8, MVT::i16, MVT::i32, MVT::i64 }) { |
| 348 | setOperationAction(ISD::BR_CC, VT, Expand); |
| 349 | setOperationAction(ISD::SELECT_CC, VT, Expand); |
| 350 | } |
| 351 | if (Subtarget.is64Bit()) |
| 352 | setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i32, Legal); |
| 353 | setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i16 , Legal); |
| 354 | setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i8 , Legal); |
| 355 | setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i1 , Expand); |
| 356 | |
| 357 | setOperationAction(ISD::FREM , MVT::f32 , Expand); |
| 358 | setOperationAction(ISD::FREM , MVT::f64 , Expand); |
| 359 | setOperationAction(ISD::FREM , MVT::f80 , Expand); |
| 360 | setOperationAction(ISD::FREM , MVT::f128 , Expand); |
| 361 | |
| 362 | if (!Subtarget.useSoftFloat() && Subtarget.hasX87()) { |
| 363 | setOperationAction(ISD::FLT_ROUNDS_ , MVT::i32 , Custom); |
| 364 | setOperationAction(ISD::SET_ROUNDING , MVT::Other, Custom); |
| 365 | } |
| 366 | |
| 367 | // Promote the i8 variants and force them on up to i32 which has a shorter |
| 368 | // encoding. |
| 369 | setOperationPromotedToType(ISD::CTTZ , MVT::i8 , MVT::i32); |
| 370 | setOperationPromotedToType(ISD::CTTZ_ZERO_UNDEF, MVT::i8 , MVT::i32); |
| 371 | |
| 372 | if (Subtarget.hasBMI()) { |
| 373 | // Promote the i16 zero undef variant and force it on up to i32 when tzcnt |
| 374 | // is enabled. |
| 375 | setOperationPromotedToType(ISD::CTTZ_ZERO_UNDEF, MVT::i16, MVT::i32); |
| 376 | } else { |
| 377 | setOperationAction(ISD::CTTZ, MVT::i16, Custom); |
| 378 | setOperationAction(ISD::CTTZ , MVT::i32 , Custom); |
| 379 | setOperationAction(ISD::CTTZ_ZERO_UNDEF, MVT::i16 , Legal); |
| 380 | setOperationAction(ISD::CTTZ_ZERO_UNDEF, MVT::i32 , Legal); |
| 381 | if (Subtarget.is64Bit()) { |
| 382 | setOperationAction(ISD::CTTZ , MVT::i64 , Custom); |
| 383 | setOperationAction(ISD::CTTZ_ZERO_UNDEF, MVT::i64, Legal); |
| 384 | } |
| 385 | } |
| 386 | |
| 387 | if (Subtarget.hasLZCNT()) { |
| 388 | // When promoting the i8 variants, force them to i32 for a shorter |
| 389 | // encoding. |
| 390 | setOperationPromotedToType(ISD::CTLZ , MVT::i8 , MVT::i32); |
| 391 | setOperationPromotedToType(ISD::CTLZ_ZERO_UNDEF, MVT::i8 , MVT::i32); |
| 392 | } else { |
| 393 | for (auto VT : {MVT::i8, MVT::i16, MVT::i32, MVT::i64}) { |
| 394 | if (VT == MVT::i64 && !Subtarget.is64Bit()) |
| 395 | continue; |
| 396 | setOperationAction(ISD::CTLZ , VT, Custom); |
| 397 | setOperationAction(ISD::CTLZ_ZERO_UNDEF, VT, Custom); |
| 398 | } |
| 399 | } |
| 400 | |
| 401 | for (auto Op : {ISD::FP16_TO_FP, ISD::STRICT_FP16_TO_FP, ISD::FP_TO_FP16, |
| 402 | ISD::STRICT_FP_TO_FP16}) { |
| 403 | // Special handling for half-precision floating point conversions. |
| 404 | // If we don't have F16C support, then lower half float conversions |
| 405 | // into library calls. |
| 406 | setOperationAction( |
| 407 | Op, MVT::f32, |
| 408 | (!Subtarget.useSoftFloat() && Subtarget.hasF16C()) ? Custom : Expand); |
| 409 | // There's never any support for operations beyond MVT::f32. |
| 410 | setOperationAction(Op, MVT::f64, Expand); |
| 411 | setOperationAction(Op, MVT::f80, Expand); |
| 412 | setOperationAction(Op, MVT::f128, Expand); |
| 413 | } |
| 414 | |
| 415 | setLoadExtAction(ISD::EXTLOAD, MVT::f32, MVT::f16, Expand); |
| 416 | setLoadExtAction(ISD::EXTLOAD, MVT::f64, MVT::f16, Expand); |
| 417 | setLoadExtAction(ISD::EXTLOAD, MVT::f80, MVT::f16, Expand); |
| 418 | setLoadExtAction(ISD::EXTLOAD, MVT::f128, MVT::f16, Expand); |
| 419 | setTruncStoreAction(MVT::f32, MVT::f16, Expand); |
| 420 | setTruncStoreAction(MVT::f64, MVT::f16, Expand); |
| 421 | setTruncStoreAction(MVT::f80, MVT::f16, Expand); |
| 422 | setTruncStoreAction(MVT::f128, MVT::f16, Expand); |
| 423 | |
| 424 | setOperationAction(ISD::PARITY, MVT::i8, Custom); |
| 425 | setOperationAction(ISD::PARITY, MVT::i16, Custom); |
| 426 | setOperationAction(ISD::PARITY, MVT::i32, Custom); |
| 427 | if (Subtarget.is64Bit()) |
| 428 | setOperationAction(ISD::PARITY, MVT::i64, Custom); |
| 429 | if (Subtarget.hasPOPCNT()) { |
| 430 | setOperationPromotedToType(ISD::CTPOP, MVT::i8, MVT::i32); |
| 431 | // popcntw is longer to encode than popcntl and also has a false dependency |
| 432 | // on the dest that popcntl hasn't had since Cannon Lake. |
| 433 | setOperationPromotedToType(ISD::CTPOP, MVT::i16, MVT::i32); |
| 434 | } else { |
| 435 | setOperationAction(ISD::CTPOP , MVT::i8 , Expand); |
| 436 | setOperationAction(ISD::CTPOP , MVT::i16 , Expand); |
| 437 | setOperationAction(ISD::CTPOP , MVT::i32 , Expand); |
| 438 | if (Subtarget.is64Bit()) |
| 439 | setOperationAction(ISD::CTPOP , MVT::i64 , Expand); |
| 440 | else |
| 441 | setOperationAction(ISD::CTPOP , MVT::i64 , Custom); |
| 442 | } |
| 443 | |
| 444 | setOperationAction(ISD::READCYCLECOUNTER , MVT::i64 , Custom); |
| 445 | |
| 446 | if (!Subtarget.hasMOVBE()) |
| 447 | setOperationAction(ISD::BSWAP , MVT::i16 , Expand); |
| 448 | |
| 449 | // X86 wants to expand cmov itself. |
| 450 | for (auto VT : { MVT::f32, MVT::f64, MVT::f80, MVT::f128 }) { |
| 451 | setOperationAction(ISD::SELECT, VT, Custom); |
| 452 | setOperationAction(ISD::SETCC, VT, Custom); |
| 453 | setOperationAction(ISD::STRICT_FSETCC, VT, Custom); |
| 454 | setOperationAction(ISD::STRICT_FSETCCS, VT, Custom); |
| 455 | } |
| 456 | for (auto VT : { MVT::i8, MVT::i16, MVT::i32, MVT::i64 }) { |
| 457 | if (VT == MVT::i64 && !Subtarget.is64Bit()) |
| 458 | continue; |
| 459 | setOperationAction(ISD::SELECT, VT, Custom); |
| 460 | setOperationAction(ISD::SETCC, VT, Custom); |
| 461 | } |
| 462 | |
| 463 | // Custom action for SELECT MMX and expand action for SELECT_CC MMX |
| 464 | setOperationAction(ISD::SELECT, MVT::x86mmx, Custom); |
| 465 | setOperationAction(ISD::SELECT_CC, MVT::x86mmx, Expand); |
| 466 | |
| 467 | setOperationAction(ISD::EH_RETURN , MVT::Other, Custom); |
| 468 | // NOTE: EH_SJLJ_SETJMP/_LONGJMP are not recommended, since |
| 469 | // LLVM/Clang supports zero-cost DWARF and SEH exception handling. |
| 470 | setOperationAction(ISD::EH_SJLJ_SETJMP, MVT::i32, Custom); |
| 471 | setOperationAction(ISD::EH_SJLJ_LONGJMP, MVT::Other, Custom); |
| 472 | setOperationAction(ISD::EH_SJLJ_SETUP_DISPATCH, MVT::Other, Custom); |
| 473 | if (TM.Options.ExceptionModel == ExceptionHandling::SjLj) |
| 474 | setLibcallName(RTLIB::UNWIND_RESUME, "_Unwind_SjLj_Resume"); |
| 475 | |
| 476 | // Darwin ABI issue. |
| 477 | for (auto VT : { MVT::i32, MVT::i64 }) { |
| 478 | if (VT == MVT::i64 && !Subtarget.is64Bit()) |
| 479 | continue; |
| 480 | setOperationAction(ISD::ConstantPool , VT, Custom); |
| 481 | setOperationAction(ISD::JumpTable , VT, Custom); |
| 482 | setOperationAction(ISD::GlobalAddress , VT, Custom); |
| 483 | setOperationAction(ISD::GlobalTLSAddress, VT, Custom); |
| 484 | setOperationAction(ISD::ExternalSymbol , VT, Custom); |
| 485 | setOperationAction(ISD::BlockAddress , VT, Custom); |
| 486 | } |
| 487 | |
| 488 | // 64-bit shl, sra, srl (iff 32-bit x86) |
| 489 | for (auto VT : { MVT::i32, MVT::i64 }) { |
| 490 | if (VT == MVT::i64 && !Subtarget.is64Bit()) |
| 491 | continue; |
| 492 | setOperationAction(ISD::SHL_PARTS, VT, Custom); |
| 493 | setOperationAction(ISD::SRA_PARTS, VT, Custom); |
| 494 | setOperationAction(ISD::SRL_PARTS, VT, Custom); |
| 495 | } |
| 496 | |
| 497 | if (Subtarget.hasSSEPrefetch() || Subtarget.hasThreeDNow()) |
| 498 | setOperationAction(ISD::PREFETCH , MVT::Other, Legal); |
| 499 | |
| 500 | setOperationAction(ISD::ATOMIC_FENCE , MVT::Other, Custom); |
| 501 | |
| 502 | // Expand certain atomics |
| 503 | for (auto VT : { MVT::i8, MVT::i16, MVT::i32, MVT::i64 }) { |
| 504 | setOperationAction(ISD::ATOMIC_CMP_SWAP_WITH_SUCCESS, VT, Custom); |
| 505 | setOperationAction(ISD::ATOMIC_LOAD_SUB, VT, Custom); |
| 506 | setOperationAction(ISD::ATOMIC_LOAD_ADD, VT, Custom); |
| 507 | setOperationAction(ISD::ATOMIC_LOAD_OR, VT, Custom); |
| 508 | setOperationAction(ISD::ATOMIC_LOAD_XOR, VT, Custom); |
| 509 | setOperationAction(ISD::ATOMIC_LOAD_AND, VT, Custom); |
| 510 | setOperationAction(ISD::ATOMIC_STORE, VT, Custom); |
| 511 | } |
| 512 | |
| 513 | if (!Subtarget.is64Bit()) |
| 514 | setOperationAction(ISD::ATOMIC_LOAD, MVT::i64, Custom); |
| 515 | |
| 516 | if (Subtarget.canUseCMPXCHG16B()) |
| 517 | setOperationAction(ISD::ATOMIC_CMP_SWAP_WITH_SUCCESS, MVT::i128, Custom); |
| 518 | |
| 519 | // FIXME - use subtarget debug flags |
| 520 | if (!Subtarget.isTargetDarwin() && !Subtarget.isTargetELF() && |
| 521 | !Subtarget.isTargetCygMing() && !Subtarget.isTargetWin64() && |
| 522 | TM.Options.ExceptionModel != ExceptionHandling::SjLj) { |
| 523 | setOperationAction(ISD::EH_LABEL, MVT::Other, Expand); |
| 524 | } |
| 525 | |
| 526 | setOperationAction(ISD::FRAME_TO_ARGS_OFFSET, MVT::i32, Custom); |
| 527 | setOperationAction(ISD::FRAME_TO_ARGS_OFFSET, MVT::i64, Custom); |
| 528 | |
| 529 | setOperationAction(ISD::INIT_TRAMPOLINE, MVT::Other, Custom); |
| 530 | setOperationAction(ISD::ADJUST_TRAMPOLINE, MVT::Other, Custom); |
| 531 | |
| 532 | setOperationAction(ISD::TRAP, MVT::Other, Legal); |
| 533 | setOperationAction(ISD::DEBUGTRAP, MVT::Other, Legal); |
| 534 | if (Subtarget.getTargetTriple().isPS4()) |
| 535 | setOperationAction(ISD::UBSANTRAP, MVT::Other, Expand); |
| 536 | else |
| 537 | setOperationAction(ISD::UBSANTRAP, MVT::Other, Legal); |
| 538 | |
| 539 | // VASTART needs to be custom lowered to use the VarArgsFrameIndex |
| 540 | setOperationAction(ISD::VASTART , MVT::Other, Custom); |
| 541 | setOperationAction(ISD::VAEND , MVT::Other, Expand); |
| 542 | bool Is64Bit = Subtarget.is64Bit(); |
| 543 | setOperationAction(ISD::VAARG, MVT::Other, Is64Bit ? Custom : Expand); |
| 544 | setOperationAction(ISD::VACOPY, MVT::Other, Is64Bit ? Custom : Expand); |
| 545 | |
| 546 | setOperationAction(ISD::STACKSAVE, MVT::Other, Expand); |
| 547 | setOperationAction(ISD::STACKRESTORE, MVT::Other, Expand); |
| 548 | |
| 549 | setOperationAction(ISD::DYNAMIC_STACKALLOC, PtrVT, Custom); |
| 550 | |
| 551 | // GC_TRANSITION_START and GC_TRANSITION_END need custom lowering. |
| 552 | setOperationAction(ISD::GC_TRANSITION_START, MVT::Other, Custom); |
| 553 | setOperationAction(ISD::GC_TRANSITION_END, MVT::Other, Custom); |
| 554 | |
| 555 | if (!Subtarget.useSoftFloat() && Subtarget.hasSSE2()) { |
| 556 | // f32 and f64 use SSE. |
| 557 | // Set up the FP register classes. |
| 558 | addRegisterClass(MVT::f32, Subtarget.hasAVX512() ? &X86::FR32XRegClass |
| 559 | : &X86::FR32RegClass); |
| 560 | addRegisterClass(MVT::f64, Subtarget.hasAVX512() ? &X86::FR64XRegClass |
| 561 | : &X86::FR64RegClass); |
| 562 | |
| 563 | // Disable f32->f64 extload as we can only generate this in one instruction |
| 564 | // under optsize. So its easier to pattern match (fpext (load)) for that |
| 565 | // case instead of needing to emit 2 instructions for extload in the |
| 566 | // non-optsize case. |
| 567 | setLoadExtAction(ISD::EXTLOAD, MVT::f64, MVT::f32, Expand); |
| 568 | |
| 569 | for (auto VT : { MVT::f32, MVT::f64 }) { |
| 570 | // Use ANDPD to simulate FABS. |
| 571 | setOperationAction(ISD::FABS, VT, Custom); |
| 572 | |
| 573 | // Use XORP to simulate FNEG. |
| 574 | setOperationAction(ISD::FNEG, VT, Custom); |
| 575 | |
| 576 | // Use ANDPD and ORPD to simulate FCOPYSIGN. |
| 577 | setOperationAction(ISD::FCOPYSIGN, VT, Custom); |
| 578 | |
| 579 | // These might be better off as horizontal vector ops. |
| 580 | setOperationAction(ISD::FADD, VT, Custom); |
| 581 | setOperationAction(ISD::FSUB, VT, Custom); |
| 582 | |
| 583 | // We don't support sin/cos/fmod |
| 584 | setOperationAction(ISD::FSIN , VT, Expand); |
| 585 | setOperationAction(ISD::FCOS , VT, Expand); |
| 586 | setOperationAction(ISD::FSINCOS, VT, Expand); |
| 587 | } |
| 588 | |
| 589 | // Lower this to MOVMSK plus an AND. |
| 590 | setOperationAction(ISD::FGETSIGN, MVT::i64, Custom); |
| 591 | setOperationAction(ISD::FGETSIGN, MVT::i32, Custom); |
| 592 | |
| 593 | } else if (!Subtarget.useSoftFloat() && Subtarget.hasSSE1() && |
| 594 | (UseX87 || Is64Bit)) { |
| 595 | // Use SSE for f32, x87 for f64. |
| 596 | // Set up the FP register classes. |
| 597 | addRegisterClass(MVT::f32, &X86::FR32RegClass); |
| 598 | if (UseX87) |
| 599 | addRegisterClass(MVT::f64, &X86::RFP64RegClass); |
| 600 | |
| 601 | // Use ANDPS to simulate FABS. |
| 602 | setOperationAction(ISD::FABS , MVT::f32, Custom); |
| 603 | |
| 604 | // Use XORP to simulate FNEG. |
| 605 | setOperationAction(ISD::FNEG , MVT::f32, Custom); |
| 606 | |
| 607 | if (UseX87) |
| 608 | setOperationAction(ISD::UNDEF, MVT::f64, Expand); |
| 609 | |
| 610 | // Use ANDPS and ORPS to simulate FCOPYSIGN. |
| 611 | if (UseX87) |
| 612 | setOperationAction(ISD::FCOPYSIGN, MVT::f64, Expand); |
| 613 | setOperationAction(ISD::FCOPYSIGN, MVT::f32, Custom); |
| 614 | |
| 615 | // We don't support sin/cos/fmod |
| 616 | setOperationAction(ISD::FSIN , MVT::f32, Expand); |
| 617 | setOperationAction(ISD::FCOS , MVT::f32, Expand); |
| 618 | setOperationAction(ISD::FSINCOS, MVT::f32, Expand); |
| 619 | |
| 620 | if (UseX87) { |
| 621 | // Always expand sin/cos functions even though x87 has an instruction. |
| 622 | setOperationAction(ISD::FSIN, MVT::f64, Expand); |
| 623 | setOperationAction(ISD::FCOS, MVT::f64, Expand); |
| 624 | setOperationAction(ISD::FSINCOS, MVT::f64, Expand); |
| 625 | } |
| 626 | } else if (UseX87) { |
| 627 | // f32 and f64 in x87. |
| 628 | // Set up the FP register classes. |
| 629 | addRegisterClass(MVT::f64, &X86::RFP64RegClass); |
| 630 | addRegisterClass(MVT::f32, &X86::RFP32RegClass); |
| 631 | |
| 632 | for (auto VT : { MVT::f32, MVT::f64 }) { |
| 633 | setOperationAction(ISD::UNDEF, VT, Expand); |
| 634 | setOperationAction(ISD::FCOPYSIGN, VT, Expand); |
| 635 | |
| 636 | // Always expand sin/cos functions even though x87 has an instruction. |
| 637 | setOperationAction(ISD::FSIN , VT, Expand); |
| 638 | setOperationAction(ISD::FCOS , VT, Expand); |
| 639 | setOperationAction(ISD::FSINCOS, VT, Expand); |
| 640 | } |
| 641 | } |
| 642 | |
| 643 | // Expand FP32 immediates into loads from the stack, save special cases. |
| 644 | if (isTypeLegal(MVT::f32)) { |
| 645 | if (UseX87 && (getRegClassFor(MVT::f32) == &X86::RFP32RegClass)) { |
| 646 | addLegalFPImmediate(APFloat(+0.0f)); // FLD0 |
| 647 | addLegalFPImmediate(APFloat(+1.0f)); // FLD1 |
| 648 | addLegalFPImmediate(APFloat(-0.0f)); // FLD0/FCHS |
| 649 | addLegalFPImmediate(APFloat(-1.0f)); // FLD1/FCHS |
| 650 | } else // SSE immediates. |
| 651 | addLegalFPImmediate(APFloat(+0.0f)); // xorps |
| 652 | } |
| 653 | // Expand FP64 immediates into loads from the stack, save special cases. |
| 654 | if (isTypeLegal(MVT::f64)) { |
| 655 | if (UseX87 && getRegClassFor(MVT::f64) == &X86::RFP64RegClass) { |
| 656 | addLegalFPImmediate(APFloat(+0.0)); // FLD0 |
| 657 | addLegalFPImmediate(APFloat(+1.0)); // FLD1 |
| 658 | addLegalFPImmediate(APFloat(-0.0)); // FLD0/FCHS |
| 659 | addLegalFPImmediate(APFloat(-1.0)); // FLD1/FCHS |
| 660 | } else // SSE immediates. |
| 661 | addLegalFPImmediate(APFloat(+0.0)); // xorpd |
| 662 | } |
| 663 | // Handle constrained floating-point operations of scalar. |
| 664 | setOperationAction(ISD::STRICT_FADD, MVT::f32, Legal); |
| 665 | setOperationAction(ISD::STRICT_FADD, MVT::f64, Legal); |
| 666 | setOperationAction(ISD::STRICT_FSUB, MVT::f32, Legal); |
| 667 | setOperationAction(ISD::STRICT_FSUB, MVT::f64, Legal); |
| 668 | setOperationAction(ISD::STRICT_FMUL, MVT::f32, Legal); |
| 669 | setOperationAction(ISD::STRICT_FMUL, MVT::f64, Legal); |
| 670 | setOperationAction(ISD::STRICT_FDIV, MVT::f32, Legal); |
| 671 | setOperationAction(ISD::STRICT_FDIV, MVT::f64, Legal); |
| 672 | setOperationAction(ISD::STRICT_FP_EXTEND, MVT::f64, Legal); |
| 673 | setOperationAction(ISD::STRICT_FP_ROUND, MVT::f32, Legal); |
| 674 | setOperationAction(ISD::STRICT_FP_ROUND, MVT::f64, Legal); |
| 675 | setOperationAction(ISD::STRICT_FSQRT, MVT::f32, Legal); |
| 676 | setOperationAction(ISD::STRICT_FSQRT, MVT::f64, Legal); |
| 677 | |
| 678 | // We don't support FMA. |
| 679 | setOperationAction(ISD::FMA, MVT::f64, Expand); |
| 680 | setOperationAction(ISD::FMA, MVT::f32, Expand); |
| 681 | |
| 682 | // f80 always uses X87. |
| 683 | if (UseX87) { |
| 684 | addRegisterClass(MVT::f80, &X86::RFP80RegClass); |
| 685 | setOperationAction(ISD::UNDEF, MVT::f80, Expand); |
| 686 | setOperationAction(ISD::FCOPYSIGN, MVT::f80, Expand); |
| 687 | { |
| 688 | APFloat TmpFlt = APFloat::getZero(APFloat::x87DoubleExtended()); |
| 689 | addLegalFPImmediate(TmpFlt); // FLD0 |
| 690 | TmpFlt.changeSign(); |
| 691 | addLegalFPImmediate(TmpFlt); // FLD0/FCHS |
| 692 | |
| 693 | bool ignored; |
| 694 | APFloat TmpFlt2(+1.0); |
| 695 | TmpFlt2.convert(APFloat::x87DoubleExtended(), APFloat::rmNearestTiesToEven, |
| 696 | &ignored); |
| 697 | addLegalFPImmediate(TmpFlt2); // FLD1 |
| 698 | TmpFlt2.changeSign(); |
| 699 | addLegalFPImmediate(TmpFlt2); // FLD1/FCHS |
| 700 | } |
| 701 | |
| 702 | // Always expand sin/cos functions even though x87 has an instruction. |
| 703 | setOperationAction(ISD::FSIN , MVT::f80, Expand); |
| 704 | setOperationAction(ISD::FCOS , MVT::f80, Expand); |
| 705 | setOperationAction(ISD::FSINCOS, MVT::f80, Expand); |
| 706 | |
| 707 | setOperationAction(ISD::FFLOOR, MVT::f80, Expand); |
| 708 | setOperationAction(ISD::FCEIL, MVT::f80, Expand); |
| 709 | setOperationAction(ISD::FTRUNC, MVT::f80, Expand); |
| 710 | setOperationAction(ISD::FRINT, MVT::f80, Expand); |
| 711 | setOperationAction(ISD::FNEARBYINT, MVT::f80, Expand); |
| 712 | setOperationAction(ISD::FMA, MVT::f80, Expand); |
| 713 | setOperationAction(ISD::LROUND, MVT::f80, Expand); |
| 714 | setOperationAction(ISD::LLROUND, MVT::f80, Expand); |
| 715 | setOperationAction(ISD::LRINT, MVT::f80, Custom); |
| 716 | setOperationAction(ISD::LLRINT, MVT::f80, Custom); |
| 717 | |
| 718 | // Handle constrained floating-point operations of scalar. |
| 719 | setOperationAction(ISD::STRICT_FADD , MVT::f80, Legal); |
| 720 | setOperationAction(ISD::STRICT_FSUB , MVT::f80, Legal); |
| 721 | setOperationAction(ISD::STRICT_FMUL , MVT::f80, Legal); |
| 722 | setOperationAction(ISD::STRICT_FDIV , MVT::f80, Legal); |
| 723 | setOperationAction(ISD::STRICT_FSQRT , MVT::f80, Legal); |
| 724 | setOperationAction(ISD::STRICT_FP_EXTEND, MVT::f80, Legal); |
| 725 | // FIXME: When the target is 64-bit, STRICT_FP_ROUND will be overwritten |
| 726 | // as Custom. |
| 727 | setOperationAction(ISD::STRICT_FP_ROUND, MVT::f80, Legal); |
| 728 | } |
| 729 | |
| 730 | // f128 uses xmm registers, but most operations require libcalls. |
| 731 | if (!Subtarget.useSoftFloat() && Subtarget.is64Bit() && Subtarget.hasSSE1()) { |
| 732 | addRegisterClass(MVT::f128, Subtarget.hasVLX() ? &X86::VR128XRegClass |
| 733 | : &X86::VR128RegClass); |
| 734 | |
| 735 | addLegalFPImmediate(APFloat::getZero(APFloat::IEEEquad())); // xorps |
| 736 | |
| 737 | setOperationAction(ISD::FADD, MVT::f128, LibCall); |
| 738 | setOperationAction(ISD::STRICT_FADD, MVT::f128, LibCall); |
| 739 | setOperationAction(ISD::FSUB, MVT::f128, LibCall); |
| 740 | setOperationAction(ISD::STRICT_FSUB, MVT::f128, LibCall); |
| 741 | setOperationAction(ISD::FDIV, MVT::f128, LibCall); |
| 742 | setOperationAction(ISD::STRICT_FDIV, MVT::f128, LibCall); |
| 743 | setOperationAction(ISD::FMUL, MVT::f128, LibCall); |
| 744 | setOperationAction(ISD::STRICT_FMUL, MVT::f128, LibCall); |
| 745 | setOperationAction(ISD::FMA, MVT::f128, LibCall); |
| 746 | setOperationAction(ISD::STRICT_FMA, MVT::f128, LibCall); |
| 747 | |
| 748 | setOperationAction(ISD::FABS, MVT::f128, Custom); |
| 749 | setOperationAction(ISD::FNEG, MVT::f128, Custom); |
| 750 | setOperationAction(ISD::FCOPYSIGN, MVT::f128, Custom); |
| 751 | |
| 752 | setOperationAction(ISD::FSIN, MVT::f128, LibCall); |
| 753 | setOperationAction(ISD::STRICT_FSIN, MVT::f128, LibCall); |
| 754 | setOperationAction(ISD::FCOS, MVT::f128, LibCall); |
| 755 | setOperationAction(ISD::STRICT_FCOS, MVT::f128, LibCall); |
| 756 | setOperationAction(ISD::FSINCOS, MVT::f128, LibCall); |
| 757 | // No STRICT_FSINCOS |
| 758 | setOperationAction(ISD::FSQRT, MVT::f128, LibCall); |
| 759 | setOperationAction(ISD::STRICT_FSQRT, MVT::f128, LibCall); |
| 760 | |
| 761 | setOperationAction(ISD::FP_EXTEND, MVT::f128, Custom); |
| 762 | setOperationAction(ISD::STRICT_FP_EXTEND, MVT::f128, Custom); |
| 763 | // We need to custom handle any FP_ROUND with an f128 input, but |
| 764 | // LegalizeDAG uses the result type to know when to run a custom handler. |
| 765 | // So we have to list all legal floating point result types here. |
| 766 | if (isTypeLegal(MVT::f32)) { |
| 767 | setOperationAction(ISD::FP_ROUND, MVT::f32, Custom); |
| 768 | setOperationAction(ISD::STRICT_FP_ROUND, MVT::f32, Custom); |
| 769 | } |
| 770 | if (isTypeLegal(MVT::f64)) { |
| 771 | setOperationAction(ISD::FP_ROUND, MVT::f64, Custom); |
| 772 | setOperationAction(ISD::STRICT_FP_ROUND, MVT::f64, Custom); |
| 773 | } |
| 774 | if (isTypeLegal(MVT::f80)) { |
| 775 | setOperationAction(ISD::FP_ROUND, MVT::f80, Custom); |
| 776 | setOperationAction(ISD::STRICT_FP_ROUND, MVT::f80, Custom); |
| 777 | } |
| 778 | |
| 779 | setOperationAction(ISD::SETCC, MVT::f128, Custom); |
| 780 | |
| 781 | setLoadExtAction(ISD::EXTLOAD, MVT::f128, MVT::f32, Expand); |
| 782 | setLoadExtAction(ISD::EXTLOAD, MVT::f128, MVT::f64, Expand); |
| 783 | setLoadExtAction(ISD::EXTLOAD, MVT::f128, MVT::f80, Expand); |
| 784 | setTruncStoreAction(MVT::f128, MVT::f32, Expand); |
| 785 | setTruncStoreAction(MVT::f128, MVT::f64, Expand); |
| 786 | setTruncStoreAction(MVT::f128, MVT::f80, Expand); |
| 787 | } |
| 788 | |
| 789 | // Always use a library call for pow. |
| 790 | setOperationAction(ISD::FPOW , MVT::f32 , Expand); |
| 791 | setOperationAction(ISD::FPOW , MVT::f64 , Expand); |
| 792 | setOperationAction(ISD::FPOW , MVT::f80 , Expand); |
| 793 | setOperationAction(ISD::FPOW , MVT::f128 , Expand); |
| 794 | |
| 795 | setOperationAction(ISD::FLOG, MVT::f80, Expand); |
| 796 | setOperationAction(ISD::FLOG2, MVT::f80, Expand); |
| 797 | setOperationAction(ISD::FLOG10, MVT::f80, Expand); |
| 798 | setOperationAction(ISD::FEXP, MVT::f80, Expand); |
| 799 | setOperationAction(ISD::FEXP2, MVT::f80, Expand); |
| 800 | setOperationAction(ISD::FMINNUM, MVT::f80, Expand); |
| 801 | setOperationAction(ISD::FMAXNUM, MVT::f80, Expand); |
| 802 | |
| 803 | // Some FP actions are always expanded for vector types. |
| 804 | for (auto VT : { MVT::v8f16, MVT::v16f16, MVT::v32f16, |
| 805 | MVT::v4f32, MVT::v8f32, MVT::v16f32, |
| 806 | MVT::v2f64, MVT::v4f64, MVT::v8f64 }) { |
| 807 | setOperationAction(ISD::FSIN, VT, Expand); |
| 808 | setOperationAction(ISD::FSINCOS, VT, Expand); |
| 809 | setOperationAction(ISD::FCOS, VT, Expand); |
| 810 | setOperationAction(ISD::FREM, VT, Expand); |
| 811 | setOperationAction(ISD::FCOPYSIGN, VT, Expand); |
| 812 | setOperationAction(ISD::FPOW, VT, Expand); |
| 813 | setOperationAction(ISD::FLOG, VT, Expand); |
| 814 | setOperationAction(ISD::FLOG2, VT, Expand); |
| 815 | setOperationAction(ISD::FLOG10, VT, Expand); |
| 816 | setOperationAction(ISD::FEXP, VT, Expand); |
| 817 | setOperationAction(ISD::FEXP2, VT, Expand); |
| 818 | } |
| 819 | |
| 820 | // First set operation action for all vector types to either promote |
| 821 | // (for widening) or expand (for scalarization). Then we will selectively |
| 822 | // turn on ones that can be effectively codegen'd. |
| 823 | for (MVT VT : MVT::fixedlen_vector_valuetypes()) { |
| 824 | setOperationAction(ISD::SDIV, VT, Expand); |
| 825 | setOperationAction(ISD::UDIV, VT, Expand); |
| 826 | setOperationAction(ISD::SREM, VT, Expand); |
| 827 | setOperationAction(ISD::UREM, VT, Expand); |
| 828 | setOperationAction(ISD::EXTRACT_VECTOR_ELT, VT,Expand); |
| 829 | setOperationAction(ISD::INSERT_VECTOR_ELT, VT, Expand); |
| 830 | setOperationAction(ISD::EXTRACT_SUBVECTOR, VT,Expand); |
| 831 | setOperationAction(ISD::INSERT_SUBVECTOR, VT,Expand); |
| 832 | setOperationAction(ISD::FMA, VT, Expand); |
| 833 | setOperationAction(ISD::FFLOOR, VT, Expand); |
| 834 | setOperationAction(ISD::FCEIL, VT, Expand); |
| 835 | setOperationAction(ISD::FTRUNC, VT, Expand); |
| 836 | setOperationAction(ISD::FRINT, VT, Expand); |
| 837 | setOperationAction(ISD::FNEARBYINT, VT, Expand); |
| 838 | setOperationAction(ISD::SMUL_LOHI, VT, Expand); |
| 839 | setOperationAction(ISD::MULHS, VT, Expand); |
| 840 | setOperationAction(ISD::UMUL_LOHI, VT, Expand); |
| 841 | setOperationAction(ISD::MULHU, VT, Expand); |
| 842 | setOperationAction(ISD::SDIVREM, VT, Expand); |
| 843 | setOperationAction(ISD::UDIVREM, VT, Expand); |
| 844 | setOperationAction(ISD::CTPOP, VT, Expand); |
| 845 | setOperationAction(ISD::CTTZ, VT, Expand); |
| 846 | setOperationAction(ISD::CTLZ, VT, Expand); |
| 847 | setOperationAction(ISD::ROTL, VT, Expand); |
| 848 | setOperationAction(ISD::ROTR, VT, Expand); |
| 849 | setOperationAction(ISD::BSWAP, VT, Expand); |
| 850 | setOperationAction(ISD::SETCC, VT, Expand); |
| 851 | setOperationAction(ISD::FP_TO_UINT, VT, Expand); |
| 852 | setOperationAction(ISD::FP_TO_SINT, VT, Expand); |
| 853 | setOperationAction(ISD::UINT_TO_FP, VT, Expand); |
| 854 | setOperationAction(ISD::SINT_TO_FP, VT, Expand); |
| 855 | setOperationAction(ISD::SIGN_EXTEND_INREG, VT,Expand); |
| 856 | setOperationAction(ISD::TRUNCATE, VT, Expand); |
| 857 | setOperationAction(ISD::SIGN_EXTEND, VT, Expand); |
| 858 | setOperationAction(ISD::ZERO_EXTEND, VT, Expand); |
| 859 | setOperationAction(ISD::ANY_EXTEND, VT, Expand); |
| 860 | setOperationAction(ISD::SELECT_CC, VT, Expand); |
| 861 | for (MVT InnerVT : MVT::fixedlen_vector_valuetypes()) { |
| 862 | setTruncStoreAction(InnerVT, VT, Expand); |
| 863 | |
| 864 | setLoadExtAction(ISD::SEXTLOAD, InnerVT, VT, Expand); |
| 865 | setLoadExtAction(ISD::ZEXTLOAD, InnerVT, VT, Expand); |
| 866 | |
| 867 | // N.b. ISD::EXTLOAD legality is basically ignored except for i1-like |
| 868 | // types, we have to deal with them whether we ask for Expansion or not. |
| 869 | // Setting Expand causes its own optimisation problems though, so leave |
| 870 | // them legal. |
| 871 | if (VT.getVectorElementType() == MVT::i1) |
| 872 | setLoadExtAction(ISD::EXTLOAD, InnerVT, VT, Expand); |
| 873 | |
| 874 | // EXTLOAD for MVT::f16 vectors is not legal because f16 vectors are |
| 875 | // split/scalarized right now. |
| 876 | if (VT.getVectorElementType() == MVT::f16) |
| 877 | setLoadExtAction(ISD::EXTLOAD, InnerVT, VT, Expand); |
| 878 | } |
| 879 | } |
| 880 | |
| 881 | // FIXME: In order to prevent SSE instructions being expanded to MMX ones |
| 882 | // with -msoft-float, disable use of MMX as well. |
| 883 | if (!Subtarget.useSoftFloat() && Subtarget.hasMMX()) { |
| 884 | addRegisterClass(MVT::x86mmx, &X86::VR64RegClass); |
| 885 | // No operations on x86mmx supported, everything uses intrinsics. |
| 886 | } |
| 887 | |
| 888 | if (!Subtarget.useSoftFloat() && Subtarget.hasSSE1()) { |
| 889 | addRegisterClass(MVT::v4f32, Subtarget.hasVLX() ? &X86::VR128XRegClass |
| 890 | : &X86::VR128RegClass); |
| 891 | |
| 892 | setOperationAction(ISD::FNEG, MVT::v4f32, Custom); |
| 893 | setOperationAction(ISD::FABS, MVT::v4f32, Custom); |
| 894 | setOperationAction(ISD::FCOPYSIGN, MVT::v4f32, Custom); |
| 895 | setOperationAction(ISD::BUILD_VECTOR, MVT::v4f32, Custom); |
| 896 | setOperationAction(ISD::VECTOR_SHUFFLE, MVT::v4f32, Custom); |
| 897 | setOperationAction(ISD::VSELECT, MVT::v4f32, Custom); |
| 898 | setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v4f32, Custom); |
| 899 | setOperationAction(ISD::SELECT, MVT::v4f32, Custom); |
| 900 | |
| 901 | setOperationAction(ISD::LOAD, MVT::v2f32, Custom); |
| 902 | setOperationAction(ISD::STORE, MVT::v2f32, Custom); |
| 903 | |
| 904 | setOperationAction(ISD::STRICT_FADD, MVT::v4f32, Legal); |
| 905 | setOperationAction(ISD::STRICT_FSUB, MVT::v4f32, Legal); |
| 906 | setOperationAction(ISD::STRICT_FMUL, MVT::v4f32, Legal); |
| 907 | setOperationAction(ISD::STRICT_FDIV, MVT::v4f32, Legal); |
| 908 | setOperationAction(ISD::STRICT_FSQRT, MVT::v4f32, Legal); |
| 909 | } |
| 910 | |
| 911 | if (!Subtarget.useSoftFloat() && Subtarget.hasSSE2()) { |
| 912 | addRegisterClass(MVT::v2f64, Subtarget.hasVLX() ? &X86::VR128XRegClass |
| 913 | : &X86::VR128RegClass); |
| 914 | |
| 915 | // FIXME: Unfortunately, -soft-float and -no-implicit-float mean XMM |
| 916 | // registers cannot be used even for integer operations. |
| 917 | addRegisterClass(MVT::v16i8, Subtarget.hasVLX() ? &X86::VR128XRegClass |
| 918 | : &X86::VR128RegClass); |
| 919 | addRegisterClass(MVT::v8i16, Subtarget.hasVLX() ? &X86::VR128XRegClass |
| 920 | : &X86::VR128RegClass); |
| 921 | addRegisterClass(MVT::v4i32, Subtarget.hasVLX() ? &X86::VR128XRegClass |
| 922 | : &X86::VR128RegClass); |
| 923 | addRegisterClass(MVT::v2i64, Subtarget.hasVLX() ? &X86::VR128XRegClass |
| 924 | : &X86::VR128RegClass); |
| 925 | |
| 926 | for (auto VT : { MVT::v2i8, MVT::v4i8, MVT::v8i8, |
| 927 | MVT::v2i16, MVT::v4i16, MVT::v2i32 }) { |
| 928 | setOperationAction(ISD::SDIV, VT, Custom); |
| 929 | setOperationAction(ISD::SREM, VT, Custom); |
| 930 | setOperationAction(ISD::UDIV, VT, Custom); |
| 931 | setOperationAction(ISD::UREM, VT, Custom); |
| 932 | } |
| 933 | |
| 934 | setOperationAction(ISD::MUL, MVT::v2i8, Custom); |
| 935 | setOperationAction(ISD::MUL, MVT::v4i8, Custom); |
| 936 | setOperationAction(ISD::MUL, MVT::v8i8, Custom); |
| 937 | |
| 938 | setOperationAction(ISD::MUL, MVT::v16i8, Custom); |
| 939 | setOperationAction(ISD::MUL, MVT::v4i32, Custom); |
| 940 | setOperationAction(ISD::MUL, MVT::v2i64, Custom); |
| 941 | setOperationAction(ISD::MULHU, MVT::v4i32, Custom); |
| 942 | setOperationAction(ISD::MULHS, MVT::v4i32, Custom); |
| 943 | setOperationAction(ISD::MULHU, MVT::v16i8, Custom); |
| 944 | setOperationAction(ISD::MULHS, MVT::v16i8, Custom); |
| 945 | setOperationAction(ISD::MULHU, MVT::v8i16, Legal); |
| 946 | setOperationAction(ISD::MULHS, MVT::v8i16, Legal); |
| 947 | setOperationAction(ISD::MUL, MVT::v8i16, Legal); |
| 948 | setOperationAction(ISD::AVGCEILU, MVT::v16i8, Legal); |
| 949 | setOperationAction(ISD::AVGCEILU, MVT::v8i16, Legal); |
| 950 | |
| 951 | setOperationAction(ISD::SMULO, MVT::v16i8, Custom); |
| 952 | setOperationAction(ISD::UMULO, MVT::v16i8, Custom); |
| 953 | |
| 954 | setOperationAction(ISD::FNEG, MVT::v2f64, Custom); |
| 955 | setOperationAction(ISD::FABS, MVT::v2f64, Custom); |
| 956 | setOperationAction(ISD::FCOPYSIGN, MVT::v2f64, Custom); |
| 957 | |
| 958 | for (auto VT : { MVT::v16i8, MVT::v8i16, MVT::v4i32, MVT::v2i64 }) { |
| 959 | setOperationAction(ISD::SMAX, VT, VT == MVT::v8i16 ? Legal : Custom); |
| 960 | setOperationAction(ISD::SMIN, VT, VT == MVT::v8i16 ? Legal : Custom); |
| 961 | setOperationAction(ISD::UMAX, VT, VT == MVT::v16i8 ? Legal : Custom); |
| 962 | setOperationAction(ISD::UMIN, VT, VT == MVT::v16i8 ? Legal : Custom); |
| 963 | } |
| 964 | |
| 965 | setOperationAction(ISD::UADDSAT, MVT::v16i8, Legal); |
| 966 | setOperationAction(ISD::SADDSAT, MVT::v16i8, Legal); |
| 967 | setOperationAction(ISD::USUBSAT, MVT::v16i8, Legal); |
| 968 | setOperationAction(ISD::SSUBSAT, MVT::v16i8, Legal); |
| 969 | setOperationAction(ISD::UADDSAT, MVT::v8i16, Legal); |
| 970 | setOperationAction(ISD::SADDSAT, MVT::v8i16, Legal); |
| 971 | setOperationAction(ISD::USUBSAT, MVT::v8i16, Legal); |
| 972 | setOperationAction(ISD::SSUBSAT, MVT::v8i16, Legal); |
| 973 | setOperationAction(ISD::USUBSAT, MVT::v4i32, Custom); |
| 974 | setOperationAction(ISD::USUBSAT, MVT::v2i64, Custom); |
| 975 | |
| 976 | setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v16i8, Custom); |
| 977 | setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v8i16, Custom); |
| 978 | setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v4i32, Custom); |
| 979 | setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v4f32, Custom); |
| 980 | |
| 981 | for (auto VT : { MVT::v16i8, MVT::v8i16, MVT::v4i32, MVT::v2i64 }) { |
| 982 | setOperationAction(ISD::SETCC, VT, Custom); |
| 983 | setOperationAction(ISD::STRICT_FSETCC, VT, Custom); |
| 984 | setOperationAction(ISD::STRICT_FSETCCS, VT, Custom); |
| 985 | setOperationAction(ISD::CTPOP, VT, Custom); |
| 986 | setOperationAction(ISD::ABS, VT, Custom); |
| 987 | |
| 988 | // The condition codes aren't legal in SSE/AVX and under AVX512 we use |
| 989 | // setcc all the way to isel and prefer SETGT in some isel patterns. |
| 990 | setCondCodeAction(ISD::SETLT, VT, Custom); |
| 991 | setCondCodeAction(ISD::SETLE, VT, Custom); |
| 992 | } |
| 993 | |
| 994 | for (auto VT : { MVT::v16i8, MVT::v8i16, MVT::v4i32 }) { |
| 995 | setOperationAction(ISD::SCALAR_TO_VECTOR, VT, Custom); |
| 996 | setOperationAction(ISD::BUILD_VECTOR, VT, Custom); |
| 997 | setOperationAction(ISD::VECTOR_SHUFFLE, VT, Custom); |
| 998 | setOperationAction(ISD::VSELECT, VT, Custom); |
| 999 | setOperationAction(ISD::EXTRACT_VECTOR_ELT, VT, Custom); |
| 1000 | } |
| 1001 | |
| 1002 | for (auto VT : { MVT::v2f64, MVT::v2i64 }) { |
| 1003 | setOperationAction(ISD::BUILD_VECTOR, VT, Custom); |
| 1004 | setOperationAction(ISD::VECTOR_SHUFFLE, VT, Custom); |
| 1005 | setOperationAction(ISD::VSELECT, VT, Custom); |
| 1006 | |
| 1007 | if (VT == MVT::v2i64 && !Subtarget.is64Bit()) |
| 1008 | continue; |
| 1009 | |
| 1010 | setOperationAction(ISD::INSERT_VECTOR_ELT, VT, Custom); |
| 1011 | setOperationAction(ISD::EXTRACT_VECTOR_ELT, VT, Custom); |
| 1012 | } |
| 1013 | |
| 1014 | // Custom lower v2i64 and v2f64 selects. |
| 1015 | setOperationAction(ISD::SELECT, MVT::v2f64, Custom); |
| 1016 | setOperationAction(ISD::SELECT, MVT::v2i64, Custom); |
| 1017 | setOperationAction(ISD::SELECT, MVT::v4i32, Custom); |
| 1018 | setOperationAction(ISD::SELECT, MVT::v8i16, Custom); |
| 1019 | setOperationAction(ISD::SELECT, MVT::v16i8, Custom); |
| 1020 | |
| 1021 | setOperationAction(ISD::FP_TO_SINT, MVT::v4i32, Legal); |
| 1022 | setOperationAction(ISD::FP_TO_UINT, MVT::v4i32, Custom); |
| 1023 | setOperationAction(ISD::FP_TO_SINT, MVT::v2i32, Custom); |
| 1024 | setOperationAction(ISD::FP_TO_UINT, MVT::v2i32, Custom); |
| 1025 | setOperationAction(ISD::STRICT_FP_TO_SINT, MVT::v4i32, Legal); |
| 1026 | setOperationAction(ISD::STRICT_FP_TO_SINT, MVT::v2i32, Custom); |
| 1027 | |
| 1028 | // Custom legalize these to avoid over promotion or custom promotion. |
| 1029 | for (auto VT : {MVT::v2i8, MVT::v4i8, MVT::v8i8, MVT::v2i16, MVT::v4i16}) { |
| 1030 | setOperationAction(ISD::FP_TO_SINT, VT, Custom); |
| 1031 | setOperationAction(ISD::FP_TO_UINT, VT, Custom); |
| 1032 | setOperationAction(ISD::STRICT_FP_TO_SINT, VT, Custom); |
| 1033 | setOperationAction(ISD::STRICT_FP_TO_UINT, VT, Custom); |
| 1034 | } |
| 1035 | |
| 1036 | setOperationAction(ISD::SINT_TO_FP, MVT::v4i32, Legal); |
| 1037 | setOperationAction(ISD::STRICT_SINT_TO_FP, MVT::v4i32, Legal); |
| 1038 | setOperationAction(ISD::SINT_TO_FP, MVT::v2i32, Custom); |
| 1039 | setOperationAction(ISD::STRICT_SINT_TO_FP, MVT::v2i32, Custom); |
| 1040 | |
| 1041 | setOperationAction(ISD::UINT_TO_FP, MVT::v2i32, Custom); |
| 1042 | setOperationAction(ISD::STRICT_UINT_TO_FP, MVT::v2i32, Custom); |
| 1043 | |
| 1044 | setOperationAction(ISD::UINT_TO_FP, MVT::v4i32, Custom); |
| 1045 | setOperationAction(ISD::STRICT_UINT_TO_FP, MVT::v4i32, Custom); |
| 1046 | |
| 1047 | // Fast v2f32 UINT_TO_FP( v2i32 ) custom conversion. |
| 1048 | setOperationAction(ISD::SINT_TO_FP, MVT::v2f32, Custom); |
| 1049 | setOperationAction(ISD::STRICT_SINT_TO_FP, MVT::v2f32, Custom); |
| 1050 | setOperationAction(ISD::UINT_TO_FP, MVT::v2f32, Custom); |
| 1051 | setOperationAction(ISD::STRICT_UINT_TO_FP, MVT::v2f32, Custom); |
| 1052 | |
| 1053 | setOperationAction(ISD::FP_EXTEND, MVT::v2f32, Custom); |
| 1054 | setOperationAction(ISD::STRICT_FP_EXTEND, MVT::v2f32, Custom); |
| 1055 | setOperationAction(ISD::FP_ROUND, MVT::v2f32, Custom); |
| 1056 | setOperationAction(ISD::STRICT_FP_ROUND, MVT::v2f32, Custom); |
| 1057 | |
| 1058 | // We want to legalize this to an f64 load rather than an i64 load on |
| 1059 | // 64-bit targets and two 32-bit loads on a 32-bit target. Similar for |
| 1060 | // store. |
| 1061 | setOperationAction(ISD::LOAD, MVT::v2i32, Custom); |
| 1062 | setOperationAction(ISD::LOAD, MVT::v4i16, Custom); |
| 1063 | setOperationAction(ISD::LOAD, MVT::v8i8, Custom); |
| 1064 | setOperationAction(ISD::STORE, MVT::v2i32, Custom); |
| 1065 | setOperationAction(ISD::STORE, MVT::v4i16, Custom); |
| 1066 | setOperationAction(ISD::STORE, MVT::v8i8, Custom); |
| 1067 | |
| 1068 | setOperationAction(ISD::BITCAST, MVT::v2i32, Custom); |
| 1069 | setOperationAction(ISD::BITCAST, MVT::v4i16, Custom); |
| 1070 | setOperationAction(ISD::BITCAST, MVT::v8i8, Custom); |
| 1071 | if (!Subtarget.hasAVX512()) |
| 1072 | setOperationAction(ISD::BITCAST, MVT::v16i1, Custom); |
| 1073 | |
| 1074 | setOperationAction(ISD::SIGN_EXTEND_VECTOR_INREG, MVT::v2i64, Custom); |
| 1075 | setOperationAction(ISD::SIGN_EXTEND_VECTOR_INREG, MVT::v4i32, Custom); |
| 1076 | setOperationAction(ISD::SIGN_EXTEND_VECTOR_INREG, MVT::v8i16, Custom); |
| 1077 | |
| 1078 | setOperationAction(ISD::SIGN_EXTEND, MVT::v4i64, Custom); |
| 1079 | |
| 1080 | setOperationAction(ISD::TRUNCATE, MVT::v2i8, Custom); |
| 1081 | setOperationAction(ISD::TRUNCATE, MVT::v2i16, Custom); |
| 1082 | setOperationAction(ISD::TRUNCATE, MVT::v2i32, Custom); |
| 1083 | setOperationAction(ISD::TRUNCATE, MVT::v4i8, Custom); |
| 1084 | setOperationAction(ISD::TRUNCATE, MVT::v4i16, Custom); |
| 1085 | setOperationAction(ISD::TRUNCATE, MVT::v8i8, Custom); |
| 1086 | |
| 1087 | // In the customized shift lowering, the legal v4i32/v2i64 cases |
| 1088 | // in AVX2 will be recognized. |
| 1089 | for (auto VT : { MVT::v16i8, MVT::v8i16, MVT::v4i32, MVT::v2i64 }) { |
| 1090 | setOperationAction(ISD::SRL, VT, Custom); |
| 1091 | setOperationAction(ISD::SHL, VT, Custom); |
| 1092 | setOperationAction(ISD::SRA, VT, Custom); |
| 1093 | if (VT == MVT::v2i64) continue; |
| 1094 | setOperationAction(ISD::ROTL, VT, Custom); |
| 1095 | setOperationAction(ISD::ROTR, VT, Custom); |
| 1096 | setOperationAction(ISD::FSHL, VT, Custom); |
| 1097 | setOperationAction(ISD::FSHR, VT, Custom); |
| 1098 | } |
| 1099 | |
| 1100 | setOperationAction(ISD::STRICT_FSQRT, MVT::v2f64, Legal); |
| 1101 | setOperationAction(ISD::STRICT_FADD, MVT::v2f64, Legal); |
| 1102 | setOperationAction(ISD::STRICT_FSUB, MVT::v2f64, Legal); |
| 1103 | setOperationAction(ISD::STRICT_FMUL, MVT::v2f64, Legal); |
| 1104 | setOperationAction(ISD::STRICT_FDIV, MVT::v2f64, Legal); |
| 1105 | } |
| 1106 | |
| 1107 | if (!Subtarget.useSoftFloat() && Subtarget.hasSSSE3()) { |
| 1108 | setOperationAction(ISD::ABS, MVT::v16i8, Legal); |
| 1109 | setOperationAction(ISD::ABS, MVT::v8i16, Legal); |
| 1110 | setOperationAction(ISD::ABS, MVT::v4i32, Legal); |
| 1111 | setOperationAction(ISD::BITREVERSE, MVT::v16i8, Custom); |
| 1112 | setOperationAction(ISD::CTLZ, MVT::v16i8, Custom); |
| 1113 | setOperationAction(ISD::CTLZ, MVT::v8i16, Custom); |
| 1114 | setOperationAction(ISD::CTLZ, MVT::v4i32, Custom); |
| 1115 | setOperationAction(ISD::CTLZ, MVT::v2i64, Custom); |
| 1116 | |
| 1117 | // These might be better off as horizontal vector ops. |
| 1118 | setOperationAction(ISD::ADD, MVT::i16, Custom); |
| 1119 | setOperationAction(ISD::ADD, MVT::i32, Custom); |
| 1120 | setOperationAction(ISD::SUB, MVT::i16, Custom); |
| 1121 | setOperationAction(ISD::SUB, MVT::i32, Custom); |
| 1122 | } |
| 1123 | |
| 1124 | if (!Subtarget.useSoftFloat() && Subtarget.hasSSE41()) { |
| 1125 | for (MVT RoundedTy : {MVT::f32, MVT::f64, MVT::v4f32, MVT::v2f64}) { |
| 1126 | setOperationAction(ISD::FFLOOR, RoundedTy, Legal); |
| 1127 | setOperationAction(ISD::STRICT_FFLOOR, RoundedTy, Legal); |
| 1128 | setOperationAction(ISD::FCEIL, RoundedTy, Legal); |
| 1129 | setOperationAction(ISD::STRICT_FCEIL, RoundedTy, Legal); |
| 1130 | setOperationAction(ISD::FTRUNC, RoundedTy, Legal); |
| 1131 | setOperationAction(ISD::STRICT_FTRUNC, RoundedTy, Legal); |
| 1132 | setOperationAction(ISD::FRINT, RoundedTy, Legal); |
| 1133 | setOperationAction(ISD::STRICT_FRINT, RoundedTy, Legal); |
| 1134 | setOperationAction(ISD::FNEARBYINT, RoundedTy, Legal); |
| 1135 | setOperationAction(ISD::STRICT_FNEARBYINT, RoundedTy, Legal); |
| 1136 | setOperationAction(ISD::FROUNDEVEN, RoundedTy, Legal); |
| 1137 | setOperationAction(ISD::STRICT_FROUNDEVEN, RoundedTy, Legal); |
| 1138 | |
| 1139 | setOperationAction(ISD::FROUND, RoundedTy, Custom); |
| 1140 | } |
| 1141 | |
| 1142 | setOperationAction(ISD::SMAX, MVT::v16i8, Legal); |
| 1143 | setOperationAction(ISD::SMAX, MVT::v4i32, Legal); |
| 1144 | setOperationAction(ISD::UMAX, MVT::v8i16, Legal); |
| 1145 | setOperationAction(ISD::UMAX, MVT::v4i32, Legal); |
| 1146 | setOperationAction(ISD::SMIN, MVT::v16i8, Legal); |
| 1147 | setOperationAction(ISD::SMIN, MVT::v4i32, Legal); |
| 1148 | setOperationAction(ISD::UMIN, MVT::v8i16, Legal); |
| 1149 | setOperationAction(ISD::UMIN, MVT::v4i32, Legal); |
| 1150 | |
| 1151 | setOperationAction(ISD::UADDSAT, MVT::v4i32, Custom); |
| 1152 | setOperationAction(ISD::SADDSAT, MVT::v2i64, Custom); |
| 1153 | setOperationAction(ISD::SSUBSAT, MVT::v2i64, Custom); |
| 1154 | |
| 1155 | // FIXME: Do we need to handle scalar-to-vector here? |
| 1156 | setOperationAction(ISD::MUL, MVT::v4i32, Legal); |
| 1157 | |
| 1158 | // We directly match byte blends in the backend as they match the VSELECT |
| 1159 | // condition form. |
| 1160 | setOperationAction(ISD::VSELECT, MVT::v16i8, Legal); |
| 1161 | |
| 1162 | // SSE41 brings specific instructions for doing vector sign extend even in |
| 1163 | // cases where we don't have SRA. |
| 1164 | for (auto VT : { MVT::v8i16, MVT::v4i32, MVT::v2i64 }) { |
| 1165 | setOperationAction(ISD::SIGN_EXTEND_VECTOR_INREG, VT, Legal); |
| 1166 | setOperationAction(ISD::ZERO_EXTEND_VECTOR_INREG, VT, Legal); |
| 1167 | } |
| 1168 | |
| 1169 | // SSE41 also has vector sign/zero extending loads, PMOV[SZ]X |
| 1170 | for (auto LoadExtOp : { ISD::SEXTLOAD, ISD::ZEXTLOAD }) { |
| 1171 | setLoadExtAction(LoadExtOp, MVT::v8i16, MVT::v8i8, Legal); |
| 1172 | setLoadExtAction(LoadExtOp, MVT::v4i32, MVT::v4i8, Legal); |
| 1173 | setLoadExtAction(LoadExtOp, MVT::v2i64, MVT::v2i8, Legal); |
| 1174 | setLoadExtAction(LoadExtOp, MVT::v4i32, MVT::v4i16, Legal); |
| 1175 | setLoadExtAction(LoadExtOp, MVT::v2i64, MVT::v2i16, Legal); |
| 1176 | setLoadExtAction(LoadExtOp, MVT::v2i64, MVT::v2i32, Legal); |
| 1177 | } |
| 1178 | |
| 1179 | if (Subtarget.is64Bit() && !Subtarget.hasAVX512()) { |
| 1180 | // We need to scalarize v4i64->v432 uint_to_fp using cvtsi2ss, but we can |
| 1181 | // do the pre and post work in the vector domain. |
| 1182 | setOperationAction(ISD::UINT_TO_FP, MVT::v4i64, Custom); |
| 1183 | setOperationAction(ISD::STRICT_UINT_TO_FP, MVT::v4i64, Custom); |
| 1184 | // We need to mark SINT_TO_FP as Custom even though we want to expand it |
| 1185 | // so that DAG combine doesn't try to turn it into uint_to_fp. |
| 1186 | setOperationAction(ISD::SINT_TO_FP, MVT::v4i64, Custom); |
| 1187 | setOperationAction(ISD::STRICT_SINT_TO_FP, MVT::v4i64, Custom); |
| 1188 | } |
| 1189 | } |
| 1190 | |
| 1191 | if (!Subtarget.useSoftFloat() && Subtarget.hasSSE42()) { |
| 1192 | setOperationAction(ISD::UADDSAT, MVT::v2i64, Custom); |
| 1193 | } |
| 1194 | |
| 1195 | if (!Subtarget.useSoftFloat() && Subtarget.hasXOP()) { |
| 1196 | for (auto VT : { MVT::v16i8, MVT::v8i16, MVT::v4i32, MVT::v2i64, |
| 1197 | MVT::v32i8, MVT::v16i16, MVT::v8i32, MVT::v4i64 }) { |
| 1198 | setOperationAction(ISD::ROTL, VT, Custom); |
| 1199 | setOperationAction(ISD::ROTR, VT, Custom); |
| 1200 | } |
| 1201 | |
| 1202 | // XOP can efficiently perform BITREVERSE with VPPERM. |
| 1203 | for (auto VT : { MVT::i8, MVT::i16, MVT::i32, MVT::i64 }) |
| 1204 | setOperationAction(ISD::BITREVERSE, VT, Custom); |
| 1205 | |
| 1206 | for (auto VT : { MVT::v16i8, MVT::v8i16, MVT::v4i32, MVT::v2i64, |
| 1207 | MVT::v32i8, MVT::v16i16, MVT::v8i32, MVT::v4i64 }) |
| 1208 | setOperationAction(ISD::BITREVERSE, VT, Custom); |
| 1209 | } |
| 1210 | |
| 1211 | if (!Subtarget.useSoftFloat() && Subtarget.hasAVX()) { |
| 1212 | bool HasInt256 = Subtarget.hasInt256(); |
| 1213 | |
| 1214 | addRegisterClass(MVT::v32i8, Subtarget.hasVLX() ? &X86::VR256XRegClass |
| 1215 | : &X86::VR256RegClass); |
| 1216 | addRegisterClass(MVT::v16i16, Subtarget.hasVLX() ? &X86::VR256XRegClass |
| 1217 | : &X86::VR256RegClass); |
| 1218 | addRegisterClass(MVT::v8i32, Subtarget.hasVLX() ? &X86::VR256XRegClass |
| 1219 | : &X86::VR256RegClass); |
| 1220 | addRegisterClass(MVT::v8f32, Subtarget.hasVLX() ? &X86::VR256XRegClass |
| 1221 | : &X86::VR256RegClass); |
| 1222 | addRegisterClass(MVT::v4i64, Subtarget.hasVLX() ? &X86::VR256XRegClass |
| 1223 | : &X86::VR256RegClass); |
| 1224 | addRegisterClass(MVT::v4f64, Subtarget.hasVLX() ? &X86::VR256XRegClass |
| 1225 | : &X86::VR256RegClass); |
| 1226 | |
| 1227 | for (auto VT : { MVT::v8f32, MVT::v4f64 }) { |
| 1228 | setOperationAction(ISD::FFLOOR, VT, Legal); |
| 1229 | setOperationAction(ISD::STRICT_FFLOOR, VT, Legal); |
| 1230 | setOperationAction(ISD::FCEIL, VT, Legal); |
| 1231 | setOperationAction(ISD::STRICT_FCEIL, VT, Legal); |
| 1232 | setOperationAction(ISD::FTRUNC, VT, Legal); |
| 1233 | setOperationAction(ISD::STRICT_FTRUNC, VT, Legal); |
| 1234 | setOperationAction(ISD::FRINT, VT, Legal); |
| 1235 | setOperationAction(ISD::STRICT_FRINT, VT, Legal); |
| 1236 | setOperationAction(ISD::FNEARBYINT, VT, Legal); |
| 1237 | setOperationAction(ISD::STRICT_FNEARBYINT, VT, Legal); |
| 1238 | setOperationAction(ISD::FROUNDEVEN, VT, Legal); |
| 1239 | setOperationAction(ISD::STRICT_FROUNDEVEN, VT, Legal); |
| 1240 | |
| 1241 | setOperationAction(ISD::FROUND, VT, Custom); |
| 1242 | |
| 1243 | setOperationAction(ISD::FNEG, VT, Custom); |
| 1244 | setOperationAction(ISD::FABS, VT, Custom); |
| 1245 | setOperationAction(ISD::FCOPYSIGN, VT, Custom); |
| 1246 | } |
| 1247 | |
| 1248 | // (fp_to_int:v8i16 (v8f32 ..)) requires the result type to be promoted |
| 1249 | // even though v8i16 is a legal type. |
| 1250 | setOperationPromotedToType(ISD::FP_TO_SINT, MVT::v8i16, MVT::v8i32); |
| 1251 | setOperationPromotedToType(ISD::FP_TO_UINT, MVT::v8i16, MVT::v8i32); |
| 1252 | setOperationPromotedToType(ISD::STRICT_FP_TO_SINT, MVT::v8i16, MVT::v8i32); |
| 1253 | setOperationPromotedToType(ISD::STRICT_FP_TO_UINT, MVT::v8i16, MVT::v8i32); |
| 1254 | setOperationAction(ISD::FP_TO_SINT, MVT::v8i32, Legal); |
| 1255 | setOperationAction(ISD::FP_TO_UINT, MVT::v8i32, Custom); |
| 1256 | setOperationAction(ISD::STRICT_FP_TO_SINT, MVT::v8i32, Legal); |
| 1257 | |
| 1258 | setOperationAction(ISD::SINT_TO_FP, MVT::v8i32, Legal); |
| 1259 | setOperationAction(ISD::STRICT_SINT_TO_FP, MVT::v8i32, Legal); |
| 1260 | |
| 1261 | setOperationAction(ISD::STRICT_FP_ROUND, MVT::v4f32, Legal); |
| 1262 | setOperationAction(ISD::STRICT_FADD, MVT::v8f32, Legal); |
| 1263 | setOperationAction(ISD::STRICT_FADD, MVT::v4f64, Legal); |
| 1264 | setOperationAction(ISD::STRICT_FSUB, MVT::v8f32, Legal); |
| 1265 | setOperationAction(ISD::STRICT_FSUB, MVT::v4f64, Legal); |
| 1266 | setOperationAction(ISD::STRICT_FMUL, MVT::v8f32, Legal); |
| 1267 | setOperationAction(ISD::STRICT_FMUL, MVT::v4f64, Legal); |
| 1268 | setOperationAction(ISD::STRICT_FDIV, MVT::v8f32, Legal); |
| 1269 | setOperationAction(ISD::STRICT_FDIV, MVT::v4f64, Legal); |
| 1270 | setOperationAction(ISD::STRICT_FP_EXTEND, MVT::v4f64, Legal); |
| 1271 | setOperationAction(ISD::STRICT_FSQRT, MVT::v8f32, Legal); |
| 1272 | setOperationAction(ISD::STRICT_FSQRT, MVT::v4f64, Legal); |
| 1273 | |
| 1274 | if (!Subtarget.hasAVX512()) |
| 1275 | setOperationAction(ISD::BITCAST, MVT::v32i1, Custom); |
| 1276 | |
| 1277 | // In the customized shift lowering, the legal v8i32/v4i64 cases |
| 1278 | // in AVX2 will be recognized. |
| 1279 | for (auto VT : { MVT::v32i8, MVT::v16i16, MVT::v8i32, MVT::v4i64 }) { |
| 1280 | setOperationAction(ISD::SRL, VT, Custom); |
| 1281 | setOperationAction(ISD::SHL, VT, Custom); |
| 1282 | setOperationAction(ISD::SRA, VT, Custom); |
| 1283 | if (VT == MVT::v4i64) continue; |
| 1284 | setOperationAction(ISD::ROTL, VT, Custom); |
| 1285 | setOperationAction(ISD::ROTR, VT, Custom); |
| 1286 | setOperationAction(ISD::FSHL, VT, Custom); |
| 1287 | setOperationAction(ISD::FSHR, VT, Custom); |
| 1288 | } |
| 1289 | |
| 1290 | // These types need custom splitting if their input is a 128-bit vector. |
| 1291 | setOperationAction(ISD::SIGN_EXTEND, MVT::v8i64, Custom); |
| 1292 | setOperationAction(ISD::SIGN_EXTEND, MVT::v16i32, Custom); |
| 1293 | setOperationAction(ISD::ZERO_EXTEND, MVT::v8i64, Custom); |
| 1294 | setOperationAction(ISD::ZERO_EXTEND, MVT::v16i32, Custom); |
| 1295 | |
| 1296 | setOperationAction(ISD::SELECT, MVT::v4f64, Custom); |
| 1297 | setOperationAction(ISD::SELECT, MVT::v4i64, Custom); |
| 1298 | setOperationAction(ISD::SELECT, MVT::v8i32, Custom); |
| 1299 | setOperationAction(ISD::SELECT, MVT::v16i16, Custom); |
| 1300 | setOperationAction(ISD::SELECT, MVT::v32i8, Custom); |
| 1301 | setOperationAction(ISD::SELECT, MVT::v8f32, Custom); |
| 1302 | |
| 1303 | for (auto VT : { MVT::v16i16, MVT::v8i32, MVT::v4i64 }) { |
| 1304 | setOperationAction(ISD::SIGN_EXTEND, VT, Custom); |
| 1305 | setOperationAction(ISD::ZERO_EXTEND, VT, Custom); |
| 1306 | setOperationAction(ISD::ANY_EXTEND, VT, Custom); |
| 1307 | } |
| 1308 | |
| 1309 | setOperationAction(ISD::TRUNCATE, MVT::v16i8, Custom); |
| 1310 | setOperationAction(ISD::TRUNCATE, MVT::v8i16, Custom); |
| 1311 | setOperationAction(ISD::TRUNCATE, MVT::v4i32, Custom); |
| 1312 | setOperationAction(ISD::BITREVERSE, MVT::v32i8, Custom); |
| 1313 | |
| 1314 | for (auto VT : { MVT::v32i8, MVT::v16i16, MVT::v8i32, MVT::v4i64 }) { |
| 1315 | setOperationAction(ISD::SETCC, VT, Custom); |
| 1316 | setOperationAction(ISD::STRICT_FSETCC, VT, Custom); |
| 1317 | setOperationAction(ISD::STRICT_FSETCCS, VT, Custom); |
| 1318 | setOperationAction(ISD::CTPOP, VT, Custom); |
| 1319 | setOperationAction(ISD::CTLZ, VT, Custom); |
| 1320 | |
| 1321 | // The condition codes aren't legal in SSE/AVX and under AVX512 we use |
| 1322 | // setcc all the way to isel and prefer SETGT in some isel patterns. |
| 1323 | setCondCodeAction(ISD::SETLT, VT, Custom); |
| 1324 | setCondCodeAction(ISD::SETLE, VT, Custom); |
| 1325 | } |
| 1326 | |
| 1327 | if (Subtarget.hasAnyFMA()) { |
| 1328 | for (auto VT : { MVT::f32, MVT::f64, MVT::v4f32, MVT::v8f32, |
| 1329 | MVT::v2f64, MVT::v4f64 }) { |
| 1330 | setOperationAction(ISD::FMA, VT, Legal); |
| 1331 | setOperationAction(ISD::STRICT_FMA, VT, Legal); |
| 1332 | } |
| 1333 | } |
| 1334 | |
| 1335 | for (auto VT : { MVT::v32i8, MVT::v16i16, MVT::v8i32, MVT::v4i64 }) { |
| 1336 | setOperationAction(ISD::ADD, VT, HasInt256 ? Legal : Custom); |
| 1337 | setOperationAction(ISD::SUB, VT, HasInt256 ? Legal : Custom); |
| 1338 | } |
| 1339 | |
| 1340 | setOperationAction(ISD::MUL, MVT::v4i64, Custom); |
| 1341 | setOperationAction(ISD::MUL, MVT::v8i32, HasInt256 ? Legal : Custom); |
| 1342 | setOperationAction(ISD::MUL, MVT::v16i16, HasInt256 ? Legal : Custom); |
| 1343 | setOperationAction(ISD::MUL, MVT::v32i8, Custom); |
| 1344 | |
| 1345 | setOperationAction(ISD::MULHU, MVT::v8i32, Custom); |
| 1346 | setOperationAction(ISD::MULHS, MVT::v8i32, Custom); |
| 1347 | setOperationAction(ISD::MULHU, MVT::v16i16, HasInt256 ? Legal : Custom); |
| 1348 | setOperationAction(ISD::MULHS, MVT::v16i16, HasInt256 ? Legal : Custom); |
| 1349 | setOperationAction(ISD::MULHU, MVT::v32i8, Custom); |
| 1350 | setOperationAction(ISD::MULHS, MVT::v32i8, Custom); |
| 1351 | setOperationAction(ISD::AVGCEILU, MVT::v16i16, HasInt256 ? Legal : Custom); |
| 1352 | setOperationAction(ISD::AVGCEILU, MVT::v32i8, HasInt256 ? Legal : Custom); |
| 1353 | |
| 1354 | setOperationAction(ISD::SMULO, MVT::v32i8, Custom); |
| 1355 | setOperationAction(ISD::UMULO, MVT::v32i8, Custom); |
| 1356 | |
| 1357 | setOperationAction(ISD::ABS, MVT::v4i64, Custom); |
| 1358 | setOperationAction(ISD::SMAX, MVT::v4i64, Custom); |
| 1359 | setOperationAction(ISD::UMAX, MVT::v4i64, Custom); |
| 1360 | setOperationAction(ISD::SMIN, MVT::v4i64, Custom); |
| 1361 | setOperationAction(ISD::UMIN, MVT::v4i64, Custom); |
| 1362 | |
| 1363 | setOperationAction(ISD::UADDSAT, MVT::v32i8, HasInt256 ? Legal : Custom); |
| 1364 | setOperationAction(ISD::SADDSAT, MVT::v32i8, HasInt256 ? Legal : Custom); |
| 1365 | setOperationAction(ISD::USUBSAT, MVT::v32i8, HasInt256 ? Legal : Custom); |
| 1366 | setOperationAction(ISD::SSUBSAT, MVT::v32i8, HasInt256 ? Legal : Custom); |
| 1367 | setOperationAction(ISD::UADDSAT, MVT::v16i16, HasInt256 ? Legal : Custom); |
| 1368 | setOperationAction(ISD::SADDSAT, MVT::v16i16, HasInt256 ? Legal : Custom); |
| 1369 | setOperationAction(ISD::USUBSAT, MVT::v16i16, HasInt256 ? Legal : Custom); |
| 1370 | setOperationAction(ISD::SSUBSAT, MVT::v16i16, HasInt256 ? Legal : Custom); |
| 1371 | setOperationAction(ISD::UADDSAT, MVT::v8i32, Custom); |
| 1372 | setOperationAction(ISD::USUBSAT, MVT::v8i32, Custom); |
| 1373 | setOperationAction(ISD::UADDSAT, MVT::v4i64, Custom); |
| 1374 | setOperationAction(ISD::USUBSAT, MVT::v4i64, Custom); |
| 1375 | |
| 1376 | for (auto VT : { MVT::v32i8, MVT::v16i16, MVT::v8i32 }) { |
| 1377 | setOperationAction(ISD::ABS, VT, HasInt256 ? Legal : Custom); |
| 1378 | setOperationAction(ISD::SMAX, VT, HasInt256 ? Legal : Custom); |
| 1379 | setOperationAction(ISD::UMAX, VT, HasInt256 ? Legal : Custom); |
| 1380 | setOperationAction(ISD::SMIN, VT, HasInt256 ? Legal : Custom); |
| 1381 | setOperationAction(ISD::UMIN, VT, HasInt256 ? Legal : Custom); |
| 1382 | } |
| 1383 | |
| 1384 | for (auto VT : {MVT::v16i16, MVT::v8i32, MVT::v4i64}) { |
| 1385 | setOperationAction(ISD::SIGN_EXTEND_VECTOR_INREG, VT, Custom); |
| 1386 | setOperationAction(ISD::ZERO_EXTEND_VECTOR_INREG, VT, Custom); |
| 1387 | } |
| 1388 | |
| 1389 | if (HasInt256) { |
| 1390 | // The custom lowering for UINT_TO_FP for v8i32 becomes interesting |
| 1391 | // when we have a 256bit-wide blend with immediate. |
| 1392 | setOperationAction(ISD::UINT_TO_FP, MVT::v8i32, Custom); |
| 1393 | setOperationAction(ISD::STRICT_UINT_TO_FP, MVT::v8i32, Custom); |
| 1394 | |
| 1395 | // AVX2 also has wider vector sign/zero extending loads, VPMOV[SZ]X |
| 1396 | for (auto LoadExtOp : { ISD::SEXTLOAD, ISD::ZEXTLOAD }) { |
| 1397 | setLoadExtAction(LoadExtOp, MVT::v16i16, MVT::v16i8, Legal); |
| 1398 | setLoadExtAction(LoadExtOp, MVT::v8i32, MVT::v8i8, Legal); |
| 1399 | setLoadExtAction(LoadExtOp, MVT::v4i64, MVT::v4i8, Legal); |
| 1400 | setLoadExtAction(LoadExtOp, MVT::v8i32, MVT::v8i16, Legal); |
| 1401 | setLoadExtAction(LoadExtOp, MVT::v4i64, MVT::v4i16, Legal); |
| 1402 | setLoadExtAction(LoadExtOp, MVT::v4i64, MVT::v4i32, Legal); |
| 1403 | } |
| 1404 | } |
| 1405 | |
| 1406 | for (auto VT : { MVT::v4i32, MVT::v8i32, MVT::v2i64, MVT::v4i64, |
| 1407 | MVT::v4f32, MVT::v8f32, MVT::v2f64, MVT::v4f64 }) { |
| 1408 | setOperationAction(ISD::MLOAD, VT, Subtarget.hasVLX() ? Legal : Custom); |
| 1409 | setOperationAction(ISD::MSTORE, VT, Legal); |
| 1410 | } |
| 1411 | |
| 1412 | // Extract subvector is special because the value type |
| 1413 | // (result) is 128-bit but the source is 256-bit wide. |
| 1414 | for (auto VT : { MVT::v16i8, MVT::v8i16, MVT::v4i32, MVT::v2i64, |
| 1415 | MVT::v4f32, MVT::v2f64 }) { |
| 1416 | setOperationAction(ISD::EXTRACT_SUBVECTOR, VT, Legal); |
| 1417 | } |
| 1418 | |
| 1419 | // Custom lower several nodes for 256-bit types. |
| 1420 | for (MVT VT : { MVT::v32i8, MVT::v16i16, MVT::v8i32, MVT::v4i64, |
| 1421 | MVT::v8f32, MVT::v4f64 }) { |
| 1422 | setOperationAction(ISD::BUILD_VECTOR, VT, Custom); |
| 1423 | setOperationAction(ISD::VECTOR_SHUFFLE, VT, Custom); |
| 1424 | setOperationAction(ISD::VSELECT, VT, Custom); |
| 1425 | setOperationAction(ISD::INSERT_VECTOR_ELT, VT, Custom); |
| 1426 | setOperationAction(ISD::EXTRACT_VECTOR_ELT, VT, Custom); |
| 1427 | setOperationAction(ISD::SCALAR_TO_VECTOR, VT, Custom); |
| 1428 | setOperationAction(ISD::INSERT_SUBVECTOR, VT, Legal); |
| 1429 | setOperationAction(ISD::CONCAT_VECTORS, VT, Custom); |
| 1430 | setOperationAction(ISD::STORE, VT, Custom); |
| 1431 | } |
| 1432 | |
| 1433 | if (HasInt256) { |
| 1434 | setOperationAction(ISD::VSELECT, MVT::v32i8, Legal); |
| 1435 | |
| 1436 | // Custom legalize 2x32 to get a little better code. |
| 1437 | setOperationAction(ISD::MGATHER, MVT::v2f32, Custom); |
| 1438 | setOperationAction(ISD::MGATHER, MVT::v2i32, Custom); |
| 1439 | |
| 1440 | for (auto VT : { MVT::v4i32, MVT::v8i32, MVT::v2i64, MVT::v4i64, |
| 1441 | MVT::v4f32, MVT::v8f32, MVT::v2f64, MVT::v4f64 }) |
| 1442 | setOperationAction(ISD::MGATHER, VT, Custom); |
| 1443 | } |
| 1444 | } |
| 1445 | |
| 1446 | // This block controls legalization of the mask vector sizes that are |
| 1447 | // available with AVX512. 512-bit vectors are in a separate block controlled |
| 1448 | // by useAVX512Regs. |
| 1449 | if (!Subtarget.useSoftFloat() && Subtarget.hasAVX512()) { |
| 1450 | addRegisterClass(MVT::v1i1, &X86::VK1RegClass); |
| 1451 | addRegisterClass(MVT::v2i1, &X86::VK2RegClass); |
| 1452 | addRegisterClass(MVT::v4i1, &X86::VK4RegClass); |
| 1453 | addRegisterClass(MVT::v8i1, &X86::VK8RegClass); |
| 1454 | addRegisterClass(MVT::v16i1, &X86::VK16RegClass); |
| 1455 | |
| 1456 | setOperationAction(ISD::SELECT, MVT::v1i1, Custom); |
| 1457 | setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v1i1, Custom); |
| 1458 | setOperationAction(ISD::BUILD_VECTOR, MVT::v1i1, Custom); |
| 1459 | |
| 1460 | setOperationPromotedToType(ISD::FP_TO_SINT, MVT::v8i1, MVT::v8i32); |
| 1461 | setOperationPromotedToType(ISD::FP_TO_UINT, MVT::v8i1, MVT::v8i32); |
| 1462 | setOperationPromotedToType(ISD::FP_TO_SINT, MVT::v4i1, MVT::v4i32); |
| 1463 | setOperationPromotedToType(ISD::FP_TO_UINT, MVT::v4i1, MVT::v4i32); |
| 1464 | setOperationPromotedToType(ISD::STRICT_FP_TO_SINT, MVT::v8i1, MVT::v8i32); |
| 1465 | setOperationPromotedToType(ISD::STRICT_FP_TO_UINT, MVT::v8i1, MVT::v8i32); |
| 1466 | setOperationPromotedToType(ISD::STRICT_FP_TO_SINT, MVT::v4i1, MVT::v4i32); |
| 1467 | setOperationPromotedToType(ISD::STRICT_FP_TO_UINT, MVT::v4i1, MVT::v4i32); |
| 1468 | setOperationAction(ISD::FP_TO_SINT, MVT::v2i1, Custom); |
| 1469 | setOperationAction(ISD::FP_TO_UINT, MVT::v2i1, Custom); |
| 1470 | setOperationAction(ISD::STRICT_FP_TO_SINT, MVT::v2i1, Custom); |
| 1471 | setOperationAction(ISD::STRICT_FP_TO_UINT, MVT::v2i1, Custom); |
| 1472 | |
| 1473 | // There is no byte sized k-register load or store without AVX512DQ. |
| 1474 | if (!Subtarget.hasDQI()) { |
| 1475 | setOperationAction(ISD::LOAD, MVT::v1i1, Custom); |
| 1476 | setOperationAction(ISD::LOAD, MVT::v2i1, Custom); |
| 1477 | setOperationAction(ISD::LOAD, MVT::v4i1, Custom); |
| 1478 | setOperationAction(ISD::LOAD, MVT::v8i1, Custom); |
| 1479 | |
| 1480 | setOperationAction(ISD::STORE, MVT::v1i1, Custom); |
| 1481 | setOperationAction(ISD::STORE, MVT::v2i1, Custom); |
| 1482 | setOperationAction(ISD::STORE, MVT::v4i1, Custom); |
| 1483 | setOperationAction(ISD::STORE, MVT::v8i1, Custom); |
| 1484 | } |
| 1485 | |
| 1486 | // Extends of v16i1/v8i1/v4i1/v2i1 to 128-bit vectors. |
| 1487 | for (auto VT : { MVT::v16i8, MVT::v8i16, MVT::v4i32, MVT::v2i64 }) { |
| 1488 | setOperationAction(ISD::SIGN_EXTEND, VT, Custom); |
| 1489 | setOperationAction(ISD::ZERO_EXTEND, VT, Custom); |
| 1490 | setOperationAction(ISD::ANY_EXTEND, VT, Custom); |
| 1491 | } |
| 1492 | |
| 1493 | for (auto VT : { MVT::v1i1, MVT::v2i1, MVT::v4i1, MVT::v8i1, MVT::v16i1 }) |
| 1494 | setOperationAction(ISD::VSELECT, VT, Expand); |
| 1495 | |
| 1496 | for (auto VT : { MVT::v2i1, MVT::v4i1, MVT::v8i1, MVT::v16i1 }) { |
| 1497 | setOperationAction(ISD::SETCC, VT, Custom); |
| 1498 | setOperationAction(ISD::STRICT_FSETCC, VT, Custom); |
| 1499 | setOperationAction(ISD::STRICT_FSETCCS, VT, Custom); |
| 1500 | setOperationAction(ISD::SELECT, VT, Custom); |
| 1501 | setOperationAction(ISD::TRUNCATE, VT, Custom); |
| 1502 | |
| 1503 | setOperationAction(ISD::BUILD_VECTOR, VT, Custom); |
| 1504 | setOperationAction(ISD::CONCAT_VECTORS, VT, Custom); |
| 1505 | setOperationAction(ISD::EXTRACT_VECTOR_ELT, VT, Custom); |
| 1506 | setOperationAction(ISD::INSERT_SUBVECTOR, VT, Custom); |
| 1507 | setOperationAction(ISD::INSERT_VECTOR_ELT, VT, Custom); |
| 1508 | setOperationAction(ISD::VECTOR_SHUFFLE, VT, Custom); |
| 1509 | } |
| 1510 | |
| 1511 | for (auto VT : { MVT::v1i1, MVT::v2i1, MVT::v4i1, MVT::v8i1 }) |
| 1512 | setOperationAction(ISD::EXTRACT_SUBVECTOR, VT, Custom); |
| 1513 | } |
| 1514 | |
| 1515 | // This block controls legalization for 512-bit operations with 32/64 bit |
| 1516 | // elements. 512-bits can be disabled based on prefer-vector-width and |
| 1517 | // required-vector-width function attributes. |
| 1518 | if (!Subtarget.useSoftFloat() && Subtarget.useAVX512Regs()) { |
| 1519 | bool HasBWI = Subtarget.hasBWI(); |
| 1520 | |
| 1521 | addRegisterClass(MVT::v16i32, &X86::VR512RegClass); |
| 1522 | addRegisterClass(MVT::v16f32, &X86::VR512RegClass); |
| 1523 | addRegisterClass(MVT::v8i64, &X86::VR512RegClass); |
| 1524 | addRegisterClass(MVT::v8f64, &X86::VR512RegClass); |
| 1525 | addRegisterClass(MVT::v32i16, &X86::VR512RegClass); |
| 1526 | addRegisterClass(MVT::v64i8, &X86::VR512RegClass); |
| 1527 | |
| 1528 | for (auto ExtType : {ISD::ZEXTLOAD, ISD::SEXTLOAD}) { |
| 1529 | setLoadExtAction(ExtType, MVT::v16i32, MVT::v16i8, Legal); |
| 1530 | setLoadExtAction(ExtType, MVT::v16i32, MVT::v16i16, Legal); |
| 1531 | setLoadExtAction(ExtType, MVT::v8i64, MVT::v8i8, Legal); |
| 1532 | setLoadExtAction(ExtType, MVT::v8i64, MVT::v8i16, Legal); |
| 1533 | setLoadExtAction(ExtType, MVT::v8i64, MVT::v8i32, Legal); |
| 1534 | if (HasBWI) |
| 1535 | setLoadExtAction(ExtType, MVT::v32i16, MVT::v32i8, Legal); |
| 1536 | } |
| 1537 | |
| 1538 | for (MVT VT : { MVT::v16f32, MVT::v8f64 }) { |
| 1539 | setOperationAction(ISD::FNEG, VT, Custom); |
| 1540 | setOperationAction(ISD::FABS, VT, Custom); |
| 1541 | setOperationAction(ISD::FMA, VT, Legal); |
| 1542 | setOperationAction(ISD::STRICT_FMA, VT, Legal); |
| 1543 | setOperationAction(ISD::FCOPYSIGN, VT, Custom); |
| 1544 | } |
| 1545 | |
| 1546 | for (MVT VT : { MVT::v16i1, MVT::v16i8, MVT::v16i16 }) { |
| 1547 | setOperationPromotedToType(ISD::FP_TO_SINT , VT, MVT::v16i32); |
| 1548 | setOperationPromotedToType(ISD::FP_TO_UINT , VT, MVT::v16i32); |
| 1549 | setOperationPromotedToType(ISD::STRICT_FP_TO_SINT, VT, MVT::v16i32); |
| 1550 | setOperationPromotedToType(ISD::STRICT_FP_TO_UINT, VT, MVT::v16i32); |
| 1551 | } |
| 1552 | setOperationAction(ISD::FP_TO_SINT, MVT::v16i32, Legal); |
| 1553 | setOperationAction(ISD::FP_TO_UINT, MVT::v16i32, Legal); |
| 1554 | setOperationAction(ISD::STRICT_FP_TO_SINT, MVT::v16i32, Legal); |
| 1555 | setOperationAction(ISD::STRICT_FP_TO_UINT, MVT::v16i32, Legal); |
| 1556 | setOperationAction(ISD::SINT_TO_FP, MVT::v16i32, Legal); |
| 1557 | setOperationAction(ISD::UINT_TO_FP, MVT::v16i32, Legal); |
| 1558 | setOperationAction(ISD::STRICT_SINT_TO_FP, MVT::v16i32, Legal); |
| 1559 | setOperationAction(ISD::STRICT_UINT_TO_FP, MVT::v16i32, Legal); |
| 1560 | |
| 1561 | setOperationAction(ISD::STRICT_FADD, MVT::v16f32, Legal); |
| 1562 | setOperationAction(ISD::STRICT_FADD, MVT::v8f64, Legal); |
| 1563 | setOperationAction(ISD::STRICT_FSUB, MVT::v16f32, Legal); |
| 1564 | setOperationAction(ISD::STRICT_FSUB, MVT::v8f64, Legal); |
| 1565 | setOperationAction(ISD::STRICT_FMUL, MVT::v16f32, Legal); |
| 1566 | setOperationAction(ISD::STRICT_FMUL, MVT::v8f64, Legal); |
| 1567 | setOperationAction(ISD::STRICT_FDIV, MVT::v16f32, Legal); |
| 1568 | setOperationAction(ISD::STRICT_FDIV, MVT::v8f64, Legal); |
| 1569 | setOperationAction(ISD::STRICT_FSQRT, MVT::v16f32, Legal); |
| 1570 | setOperationAction(ISD::STRICT_FSQRT, MVT::v8f64, Legal); |
| 1571 | setOperationAction(ISD::STRICT_FP_EXTEND, MVT::v8f64, Legal); |
| 1572 | setOperationAction(ISD::STRICT_FP_ROUND, MVT::v8f32, Legal); |
| 1573 | |
| 1574 | setTruncStoreAction(MVT::v8i64, MVT::v8i8, Legal); |
| 1575 | setTruncStoreAction(MVT::v8i64, MVT::v8i16, Legal); |
| 1576 | setTruncStoreAction(MVT::v8i64, MVT::v8i32, Legal); |
| 1577 | setTruncStoreAction(MVT::v16i32, MVT::v16i8, Legal); |
| 1578 | setTruncStoreAction(MVT::v16i32, MVT::v16i16, Legal); |
| 1579 | if (HasBWI) |
| 1580 | setTruncStoreAction(MVT::v32i16, MVT::v32i8, Legal); |
| 1581 | |
| 1582 | // With 512-bit vectors and no VLX, we prefer to widen MLOAD/MSTORE |
| 1583 | // to 512-bit rather than use the AVX2 instructions so that we can use |
| 1584 | // k-masks. |
| 1585 | if (!Subtarget.hasVLX()) { |
| 1586 | for (auto VT : {MVT::v4i32, MVT::v8i32, MVT::v2i64, MVT::v4i64, |
| 1587 | MVT::v4f32, MVT::v8f32, MVT::v2f64, MVT::v4f64}) { |
| 1588 | setOperationAction(ISD::MLOAD, VT, Custom); |
| 1589 | setOperationAction(ISD::MSTORE, VT, Custom); |
| 1590 | } |
| 1591 | } |
| 1592 | |
| 1593 | setOperationAction(ISD::TRUNCATE, MVT::v8i32, Legal); |
| 1594 | setOperationAction(ISD::TRUNCATE, MVT::v16i16, Legal); |
| 1595 | setOperationAction(ISD::TRUNCATE, MVT::v32i8, HasBWI ? Legal : Custom); |
| 1596 | setOperationAction(ISD::TRUNCATE, MVT::v16i64, Custom); |
| 1597 | setOperationAction(ISD::ZERO_EXTEND, MVT::v32i16, Custom); |
| 1598 | setOperationAction(ISD::ZERO_EXTEND, MVT::v16i32, Custom); |
| 1599 | setOperationAction(ISD::ZERO_EXTEND, MVT::v8i64, Custom); |
| 1600 | setOperationAction(ISD::ANY_EXTEND, MVT::v32i16, Custom); |
| 1601 | setOperationAction(ISD::ANY_EXTEND, MVT::v16i32, Custom); |
| 1602 | setOperationAction(ISD::ANY_EXTEND, MVT::v8i64, Custom); |
| 1603 | setOperationAction(ISD::SIGN_EXTEND, MVT::v32i16, Custom); |
| 1604 | setOperationAction(ISD::SIGN_EXTEND, MVT::v16i32, Custom); |
| 1605 | setOperationAction(ISD::SIGN_EXTEND, MVT::v8i64, Custom); |
| 1606 | |
| 1607 | if (HasBWI) { |
| 1608 | // Extends from v64i1 masks to 512-bit vectors. |
| 1609 | setOperationAction(ISD::SIGN_EXTEND, MVT::v64i8, Custom); |
| 1610 | setOperationAction(ISD::ZERO_EXTEND, MVT::v64i8, Custom); |
| 1611 | setOperationAction(ISD::ANY_EXTEND, MVT::v64i8, Custom); |
| 1612 | } |
| 1613 | |
| 1614 | for (auto VT : { MVT::v16f32, MVT::v8f64 }) { |
| 1615 | setOperationAction(ISD::FFLOOR, VT, Legal); |
| 1616 | setOperationAction(ISD::STRICT_FFLOOR, VT, Legal); |
| 1617 | setOperationAction(ISD::FCEIL, VT, Legal); |
| 1618 | setOperationAction(ISD::STRICT_FCEIL, VT, Legal); |
| 1619 | setOperationAction(ISD::FTRUNC, VT, Legal); |
| 1620 | setOperationAction(ISD::STRICT_FTRUNC, VT, Legal); |
| 1621 | setOperationAction(ISD::FRINT, VT, Legal); |
| 1622 | setOperationAction(ISD::STRICT_FRINT, VT, Legal); |
| 1623 | setOperationAction(ISD::FNEARBYINT, VT, Legal); |
| 1624 | setOperationAction(ISD::STRICT_FNEARBYINT, VT, Legal); |
| 1625 | setOperationAction(ISD::FROUNDEVEN, VT, Legal); |
| 1626 | setOperationAction(ISD::STRICT_FROUNDEVEN, VT, Legal); |
| 1627 | |
| 1628 | setOperationAction(ISD::FROUND, VT, Custom); |
| 1629 | } |
| 1630 | |
| 1631 | for (auto VT : {MVT::v32i16, MVT::v16i32, MVT::v8i64}) { |
| 1632 | setOperationAction(ISD::SIGN_EXTEND_VECTOR_INREG, VT, Custom); |
| 1633 | setOperationAction(ISD::ZERO_EXTEND_VECTOR_INREG, VT, Custom); |
| 1634 | } |
| 1635 | |
| 1636 | setOperationAction(ISD::ADD, MVT::v32i16, HasBWI ? Legal : Custom); |
| 1637 | setOperationAction(ISD::SUB, MVT::v32i16, HasBWI ? Legal : Custom); |
| 1638 | setOperationAction(ISD::ADD, MVT::v64i8, HasBWI ? Legal : Custom); |
| 1639 | setOperationAction(ISD::SUB, MVT::v64i8, HasBWI ? Legal : Custom); |
| 1640 | |
| 1641 | setOperationAction(ISD::MUL, MVT::v8i64, Custom); |
| 1642 | setOperationAction(ISD::MUL, MVT::v16i32, Legal); |
| 1643 | setOperationAction(ISD::MUL, MVT::v32i16, HasBWI ? Legal : Custom); |
| 1644 | setOperationAction(ISD::MUL, MVT::v64i8, Custom); |
| 1645 | |
| 1646 | setOperationAction(ISD::MULHU, MVT::v16i32, Custom); |
| 1647 | setOperationAction(ISD::MULHS, MVT::v16i32, Custom); |
| 1648 | setOperationAction(ISD::MULHS, MVT::v32i16, HasBWI ? Legal : Custom); |
| 1649 | setOperationAction(ISD::MULHU, MVT::v32i16, HasBWI ? Legal : Custom); |
| 1650 | setOperationAction(ISD::MULHS, MVT::v64i8, Custom); |
| 1651 | setOperationAction(ISD::MULHU, MVT::v64i8, Custom); |
| 1652 | setOperationAction(ISD::AVGCEILU, MVT::v32i16, HasBWI ? Legal : Custom); |
| 1653 | setOperationAction(ISD::AVGCEILU, MVT::v64i8, HasBWI ? Legal : Custom); |
| 1654 | |
| 1655 | setOperationAction(ISD::SMULO, MVT::v64i8, Custom); |
| 1656 | setOperationAction(ISD::UMULO, MVT::v64i8, Custom); |
| 1657 | |
| 1658 | setOperationAction(ISD::BITREVERSE, MVT::v64i8, Custom); |
| 1659 | |
| 1660 | for (auto VT : { MVT::v64i8, MVT::v32i16, MVT::v16i32, MVT::v8i64 }) { |
| 1661 | setOperationAction(ISD::SRL, VT, Custom); |
| 1662 | setOperationAction(ISD::SHL, VT, Custom); |
| 1663 | setOperationAction(ISD::SRA, VT, Custom); |
| 1664 | setOperationAction(ISD::ROTL, VT, Custom); |
| 1665 | setOperationAction(ISD::ROTR, VT, Custom); |
| 1666 | setOperationAction(ISD::SETCC, VT, Custom); |
| 1667 | |
| 1668 | // The condition codes aren't legal in SSE/AVX and under AVX512 we use |
| 1669 | // setcc all the way to isel and prefer SETGT in some isel patterns. |
| 1670 | setCondCodeAction(ISD::SETLT, VT, Custom); |
| 1671 | setCondCodeAction(ISD::SETLE, VT, Custom); |
| 1672 | } |
| 1673 | for (auto VT : { MVT::v16i32, MVT::v8i64 }) { |
| 1674 | setOperationAction(ISD::SMAX, VT, Legal); |
| 1675 | setOperationAction(ISD::UMAX, VT, Legal); |
| 1676 | setOperationAction(ISD::SMIN, VT, Legal); |
| 1677 | setOperationAction(ISD::UMIN, VT, Legal); |
| 1678 | setOperationAction(ISD::ABS, VT, Legal); |
| 1679 | setOperationAction(ISD::CTPOP, VT, Custom); |
| 1680 | setOperationAction(ISD::STRICT_FSETCC, VT, Custom); |
| 1681 | setOperationAction(ISD::STRICT_FSETCCS, VT, Custom); |
| 1682 | } |
| 1683 | |
| 1684 | for (auto VT : { MVT::v64i8, MVT::v32i16 }) { |
| 1685 | setOperationAction(ISD::ABS, VT, HasBWI ? Legal : Custom); |
| 1686 | setOperationAction(ISD::CTPOP, VT, Subtarget.hasBITALG() ? Legal : Custom); |
| 1687 | setOperationAction(ISD::CTLZ, VT, Custom); |
| 1688 | setOperationAction(ISD::SMAX, VT, HasBWI ? Legal : Custom); |
| 1689 | setOperationAction(ISD::UMAX, VT, HasBWI ? Legal : Custom); |
| 1690 | setOperationAction(ISD::SMIN, VT, HasBWI ? Legal : Custom); |
| 1691 | setOperationAction(ISD::UMIN, VT, HasBWI ? Legal : Custom); |
| 1692 | setOperationAction(ISD::UADDSAT, VT, HasBWI ? Legal : Custom); |
| 1693 | setOperationAction(ISD::SADDSAT, VT, HasBWI ? Legal : Custom); |
| 1694 | setOperationAction(ISD::USUBSAT, VT, HasBWI ? Legal : Custom); |
| 1695 | setOperationAction(ISD::SSUBSAT, VT, HasBWI ? Legal : Custom); |
| 1696 | } |
| 1697 | |
| 1698 | setOperationAction(ISD::FSHL, MVT::v64i8, Custom); |
| 1699 | setOperationAction(ISD::FSHR, MVT::v64i8, Custom); |
| 1700 | setOperationAction(ISD::FSHL, MVT::v32i16, Custom); |
| 1701 | setOperationAction(ISD::FSHR, MVT::v32i16, Custom); |
| 1702 | setOperationAction(ISD::FSHL, MVT::v16i32, Custom); |
| 1703 | setOperationAction(ISD::FSHR, MVT::v16i32, Custom); |
| 1704 | |
| 1705 | if (Subtarget.hasDQI()) { |
| 1706 | setOperationAction(ISD::SINT_TO_FP, MVT::v8i64, Legal); |
| 1707 | setOperationAction(ISD::UINT_TO_FP, MVT::v8i64, Legal); |
| 1708 | setOperationAction(ISD::STRICT_SINT_TO_FP, MVT::v8i64, Legal); |
| 1709 | setOperationAction(ISD::STRICT_UINT_TO_FP, MVT::v8i64, Legal); |
| 1710 | setOperationAction(ISD::FP_TO_SINT, MVT::v8i64, Legal); |
| 1711 | setOperationAction(ISD::FP_TO_UINT, MVT::v8i64, Legal); |
| 1712 | setOperationAction(ISD::STRICT_FP_TO_SINT, MVT::v8i64, Legal); |
| 1713 | setOperationAction(ISD::STRICT_FP_TO_UINT, MVT::v8i64, Legal); |
| 1714 | |
| 1715 | setOperationAction(ISD::MUL, MVT::v8i64, Legal); |
| 1716 | } |
| 1717 | |
| 1718 | if (Subtarget.hasCDI()) { |
| 1719 | // NonVLX sub-targets extend 128/256 vectors to use the 512 version. |
| 1720 | for (auto VT : { MVT::v16i32, MVT::v8i64} ) { |
| 1721 | setOperationAction(ISD::CTLZ, VT, Legal); |
| 1722 | } |
| 1723 | } // Subtarget.hasCDI() |
| 1724 | |
| 1725 | if (Subtarget.hasVPOPCNTDQ()) { |
| 1726 | for (auto VT : { MVT::v16i32, MVT::v8i64 }) |
| 1727 | setOperationAction(ISD::CTPOP, VT, Legal); |
| 1728 | } |
| 1729 | |
| 1730 | // Extract subvector is special because the value type |
| 1731 | // (result) is 256-bit but the source is 512-bit wide. |
| 1732 | // 128-bit was made Legal under AVX1. |
| 1733 | for (auto VT : { MVT::v32i8, MVT::v16i16, MVT::v8i32, MVT::v4i64, |
| 1734 | MVT::v8f32, MVT::v4f64 }) |
| 1735 | setOperationAction(ISD::EXTRACT_SUBVECTOR, VT, Legal); |
| 1736 | |
| 1737 | for (auto VT : { MVT::v64i8, MVT::v32i16, MVT::v16i32, MVT::v8i64, |
| 1738 | MVT::v16f32, MVT::v8f64 }) { |
| 1739 | setOperationAction(ISD::CONCAT_VECTORS, VT, Custom); |
| 1740 | setOperationAction(ISD::INSERT_SUBVECTOR, VT, Legal); |
| 1741 | setOperationAction(ISD::SELECT, VT, Custom); |
| 1742 | setOperationAction(ISD::VSELECT, VT, Custom); |
| 1743 | setOperationAction(ISD::BUILD_VECTOR, VT, Custom); |
| 1744 | setOperationAction(ISD::EXTRACT_VECTOR_ELT, VT, Custom); |
| 1745 | setOperationAction(ISD::VECTOR_SHUFFLE, VT, Custom); |
| 1746 | setOperationAction(ISD::SCALAR_TO_VECTOR, VT, Custom); |
| 1747 | setOperationAction(ISD::INSERT_VECTOR_ELT, VT, Custom); |
| 1748 | } |
| 1749 | |
| 1750 | for (auto VT : { MVT::v16i32, MVT::v8i64, MVT::v16f32, MVT::v8f64 }) { |
| 1751 | setOperationAction(ISD::MLOAD, VT, Legal); |
| 1752 | setOperationAction(ISD::MSTORE, VT, Legal); |
| 1753 | setOperationAction(ISD::MGATHER, VT, Custom); |
| 1754 | setOperationAction(ISD::MSCATTER, VT, Custom); |
| 1755 | } |
| 1756 | if (HasBWI) { |
| 1757 | for (auto VT : { MVT::v64i8, MVT::v32i16 }) { |
| 1758 | setOperationAction(ISD::MLOAD, VT, Legal); |
| 1759 | setOperationAction(ISD::MSTORE, VT, Legal); |
| 1760 | } |
| 1761 | } else { |
| 1762 | setOperationAction(ISD::STORE, MVT::v32i16, Custom); |
| 1763 | setOperationAction(ISD::STORE, MVT::v64i8, Custom); |
| 1764 | } |
| 1765 | |
| 1766 | if (Subtarget.hasVBMI2()) { |
| 1767 | for (auto VT : { MVT::v8i16, MVT::v4i32, MVT::v2i64, |
| 1768 | MVT::v16i16, MVT::v8i32, MVT::v4i64, |
| 1769 | MVT::v32i16, MVT::v16i32, MVT::v8i64 }) { |
| 1770 | setOperationAction(ISD::FSHL, VT, Custom); |
| 1771 | setOperationAction(ISD::FSHR, VT, Custom); |
| 1772 | } |
| 1773 | |
| 1774 | setOperationAction(ISD::ROTL, MVT::v32i16, Custom); |
| 1775 | setOperationAction(ISD::ROTR, MVT::v8i16, Custom); |
| 1776 | setOperationAction(ISD::ROTR, MVT::v16i16, Custom); |
| 1777 | setOperationAction(ISD::ROTR, MVT::v32i16, Custom); |
| 1778 | } |
| 1779 | }// useAVX512Regs |
| 1780 | |
| 1781 | // This block controls legalization for operations that don't have |
| 1782 | // pre-AVX512 equivalents. Without VLX we use 512-bit operations for |
| 1783 | // narrower widths. |
| 1784 | if (!Subtarget.useSoftFloat() && Subtarget.hasAVX512()) { |
| 1785 | // These operations are handled on non-VLX by artificially widening in |
| 1786 | // isel patterns. |
| 1787 | |
| 1788 | setOperationAction(ISD::FP_TO_UINT, MVT::v8i32, |
| 1789 | Subtarget.hasVLX() ? Legal : Custom); |
| 1790 | setOperationAction(ISD::FP_TO_UINT, MVT::v4i32, |
| 1791 | Subtarget.hasVLX() ? Legal : Custom); |
| 1792 | setOperationAction(ISD::STRICT_FP_TO_UINT, MVT::v8i32, |
| 1793 | Subtarget.hasVLX() ? Legal : Custom); |
| 1794 | setOperationAction(ISD::STRICT_FP_TO_UINT, MVT::v4i32, |
| 1795 | Subtarget.hasVLX() ? Legal : Custom); |
| 1796 | setOperationAction(ISD::STRICT_FP_TO_UINT, MVT::v2i32, Custom); |
| 1797 | setOperationAction(ISD::UINT_TO_FP, MVT::v8i32, |
| 1798 | Subtarget.hasVLX() ? Legal : Custom); |
| 1799 | setOperationAction(ISD::UINT_TO_FP, MVT::v4i32, |
| 1800 | Subtarget.hasVLX() ? Legal : Custom); |
| 1801 | setOperationAction(ISD::STRICT_UINT_TO_FP, MVT::v8i32, |
| 1802 | Subtarget.hasVLX() ? Legal : Custom); |
| 1803 | setOperationAction(ISD::STRICT_UINT_TO_FP, MVT::v4i32, |
| 1804 | Subtarget.hasVLX() ? Legal : Custom); |
| 1805 | |
| 1806 | if (Subtarget.hasDQI()) { |
| 1807 | // Fast v2f32 SINT_TO_FP( v2i64 ) custom conversion. |
| 1808 | // v2f32 UINT_TO_FP is already custom under SSE2. |
| 1809 | assert(isOperationCustom(ISD::UINT_TO_FP, MVT::v2f32) &&(static_cast <bool> (isOperationCustom(ISD::UINT_TO_FP, MVT::v2f32) && isOperationCustom(ISD::STRICT_UINT_TO_FP , MVT::v2f32) && "Unexpected operation action!") ? void (0) : __assert_fail ("isOperationCustom(ISD::UINT_TO_FP, MVT::v2f32) && isOperationCustom(ISD::STRICT_UINT_TO_FP, MVT::v2f32) && \"Unexpected operation action!\"" , "llvm/lib/Target/X86/X86ISelLowering.cpp", 1811, __extension__ __PRETTY_FUNCTION__)) |
| 1810 | isOperationCustom(ISD::STRICT_UINT_TO_FP, MVT::v2f32) &&(static_cast <bool> (isOperationCustom(ISD::UINT_TO_FP, MVT::v2f32) && isOperationCustom(ISD::STRICT_UINT_TO_FP , MVT::v2f32) && "Unexpected operation action!") ? void (0) : __assert_fail ("isOperationCustom(ISD::UINT_TO_FP, MVT::v2f32) && isOperationCustom(ISD::STRICT_UINT_TO_FP, MVT::v2f32) && \"Unexpected operation action!\"" , "llvm/lib/Target/X86/X86ISelLowering.cpp", 1811, __extension__ __PRETTY_FUNCTION__)) |
| 1811 | "Unexpected operation action!")(static_cast <bool> (isOperationCustom(ISD::UINT_TO_FP, MVT::v2f32) && isOperationCustom(ISD::STRICT_UINT_TO_FP , MVT::v2f32) && "Unexpected operation action!") ? void (0) : __assert_fail ("isOperationCustom(ISD::UINT_TO_FP, MVT::v2f32) && isOperationCustom(ISD::STRICT_UINT_TO_FP, MVT::v2f32) && \"Unexpected operation action!\"" , "llvm/lib/Target/X86/X86ISelLowering.cpp", 1811, __extension__ __PRETTY_FUNCTION__)); |
| 1812 | // v2i64 FP_TO_S/UINT(v2f32) custom conversion. |
| 1813 | setOperationAction(ISD::FP_TO_SINT, MVT::v2f32, Custom); |
| 1814 | setOperationAction(ISD::FP_TO_UINT, MVT::v2f32, Custom); |
| 1815 | setOperationAction(ISD::STRICT_FP_TO_SINT, MVT::v2f32, Custom); |
| 1816 | setOperationAction(ISD::STRICT_FP_TO_UINT, MVT::v2f32, Custom); |
| 1817 | } |
| 1818 | |
| 1819 | for (auto VT : { MVT::v2i64, MVT::v4i64 }) { |
| 1820 | setOperationAction(ISD::SMAX, VT, Legal); |
| 1821 | setOperationAction(ISD::UMAX, VT, Legal); |
| 1822 | setOperationAction(ISD::SMIN, VT, Legal); |
| 1823 | setOperationAction(ISD::UMIN, VT, Legal); |
| 1824 | setOperationAction(ISD::ABS, VT, Legal); |
| 1825 | } |
| 1826 | |
| 1827 | for (auto VT : { MVT::v4i32, MVT::v8i32, MVT::v2i64, MVT::v4i64 }) { |
| 1828 | setOperationAction(ISD::ROTL, VT, Custom); |
| 1829 | setOperationAction(ISD::ROTR, VT, Custom); |
| 1830 | } |
| 1831 | |
| 1832 | // Custom legalize 2x32 to get a little better code. |
| 1833 | setOperationAction(ISD::MSCATTER, MVT::v2f32, Custom); |
| 1834 | setOperationAction(ISD::MSCATTER, MVT::v2i32, Custom); |
| 1835 | |
| 1836 | for (auto VT : { MVT::v4i32, MVT::v8i32, MVT::v2i64, MVT::v4i64, |
| 1837 | MVT::v4f32, MVT::v8f32, MVT::v2f64, MVT::v4f64 }) |
| 1838 | setOperationAction(ISD::MSCATTER, VT, Custom); |
| 1839 | |
| 1840 | if (Subtarget.hasDQI()) { |
| 1841 | for (auto VT : { MVT::v2i64, MVT::v4i64 }) { |
| 1842 | setOperationAction(ISD::SINT_TO_FP, VT, |
| 1843 | Subtarget.hasVLX() ? Legal : Custom); |
| 1844 | setOperationAction(ISD::UINT_TO_FP, VT, |
| 1845 | Subtarget.hasVLX() ? Legal : Custom); |
| 1846 | setOperationAction(ISD::STRICT_SINT_TO_FP, VT, |
| 1847 | Subtarget.hasVLX() ? Legal : Custom); |
| 1848 | setOperationAction(ISD::STRICT_UINT_TO_FP, VT, |
| 1849 | Subtarget.hasVLX() ? Legal : Custom); |
| 1850 | setOperationAction(ISD::FP_TO_SINT, VT, |
| 1851 | Subtarget.hasVLX() ? Legal : Custom); |
| 1852 | setOperationAction(ISD::FP_TO_UINT, VT, |
| 1853 | Subtarget.hasVLX() ? Legal : Custom); |
| 1854 | setOperationAction(ISD::STRICT_FP_TO_SINT, VT, |
| 1855 | Subtarget.hasVLX() ? Legal : Custom); |
| 1856 | setOperationAction(ISD::STRICT_FP_TO_UINT, VT, |
| 1857 | Subtarget.hasVLX() ? Legal : Custom); |
| 1858 | setOperationAction(ISD::MUL, VT, Legal); |
| 1859 | } |
| 1860 | } |
| 1861 | |
| 1862 | if (Subtarget.hasCDI()) { |
| 1863 | for (auto VT : { MVT::v4i32, MVT::v8i32, MVT::v2i64, MVT::v4i64 }) { |
| 1864 | setOperationAction(ISD::CTLZ, VT, Legal); |
| 1865 | } |
| 1866 | } // Subtarget.hasCDI() |
| 1867 | |
| 1868 | if (Subtarget.hasVPOPCNTDQ()) { |
| 1869 | for (auto VT : { MVT::v4i32, MVT::v8i32, MVT::v2i64, MVT::v4i64 }) |
| 1870 | setOperationAction(ISD::CTPOP, VT, Legal); |
| 1871 | } |
| 1872 | } |
| 1873 | |
| 1874 | // This block control legalization of v32i1/v64i1 which are available with |
| 1875 | // AVX512BW. 512-bit v32i16 and v64i8 vector legalization is controlled with |
| 1876 | // useBWIRegs. |
| 1877 | if (!Subtarget.useSoftFloat() && Subtarget.hasBWI()) { |
| 1878 | addRegisterClass(MVT::v32i1, &X86::VK32RegClass); |
| 1879 | addRegisterClass(MVT::v64i1, &X86::VK64RegClass); |
| 1880 | |
| 1881 | for (auto VT : { MVT::v32i1, MVT::v64i1 }) { |
| 1882 | setOperationAction(ISD::VSELECT, VT, Expand); |
| 1883 | setOperationAction(ISD::TRUNCATE, VT, Custom); |
| 1884 | setOperationAction(ISD::SETCC, VT, Custom); |
| 1885 | setOperationAction(ISD::EXTRACT_VECTOR_ELT, VT, Custom); |
| 1886 | setOperationAction(ISD::INSERT_VECTOR_ELT, VT, Custom); |
| 1887 | setOperationAction(ISD::SELECT, VT, Custom); |
| 1888 | setOperationAction(ISD::BUILD_VECTOR, VT, Custom); |
| 1889 | setOperationAction(ISD::VECTOR_SHUFFLE, VT, Custom); |
| 1890 | setOperationAction(ISD::CONCAT_VECTORS, VT, Custom); |
| 1891 | setOperationAction(ISD::INSERT_SUBVECTOR, VT, Custom); |
| 1892 | } |
| 1893 | |
| 1894 | for (auto VT : { MVT::v16i1, MVT::v32i1 }) |
| 1895 | setOperationAction(ISD::EXTRACT_SUBVECTOR, VT, Custom); |
| 1896 | |
| 1897 | // Extends from v32i1 masks to 256-bit vectors. |
| 1898 | setOperationAction(ISD::SIGN_EXTEND, MVT::v32i8, Custom); |
| 1899 | setOperationAction(ISD::ZERO_EXTEND, MVT::v32i8, Custom); |
| 1900 | setOperationAction(ISD::ANY_EXTEND, MVT::v32i8, Custom); |
| 1901 | |
| 1902 | for (auto VT : { MVT::v32i8, MVT::v16i8, MVT::v16i16, MVT::v8i16 }) { |
| 1903 | setOperationAction(ISD::MLOAD, VT, Subtarget.hasVLX() ? Legal : Custom); |
| 1904 | setOperationAction(ISD::MSTORE, VT, Subtarget.hasVLX() ? Legal : Custom); |
| 1905 | } |
| 1906 | |
| 1907 | // These operations are handled on non-VLX by artificially widening in |
| 1908 | // isel patterns. |
| 1909 | // TODO: Custom widen in lowering on non-VLX and drop the isel patterns? |
| 1910 | |
| 1911 | if (Subtarget.hasBITALG()) { |
| 1912 | for (auto VT : { MVT::v16i8, MVT::v32i8, MVT::v8i16, MVT::v16i16 }) |
| 1913 | setOperationAction(ISD::CTPOP, VT, Legal); |
| 1914 | } |
| 1915 | } |
| 1916 | |
| 1917 | if (!Subtarget.useSoftFloat() && Subtarget.hasFP16()) { |
| 1918 | auto setGroup = [&] (MVT VT) { |
| 1919 | setOperationAction(ISD::FADD, VT, Legal); |
| 1920 | setOperationAction(ISD::STRICT_FADD, VT, Legal); |
| 1921 | setOperationAction(ISD::FSUB, VT, Legal); |
| 1922 | setOperationAction(ISD::STRICT_FSUB, VT, Legal); |
| 1923 | setOperationAction(ISD::FMUL, VT, Legal); |
| 1924 | setOperationAction(ISD::STRICT_FMUL, VT, Legal); |
| 1925 | setOperationAction(ISD::FDIV, VT, Legal); |
| 1926 | setOperationAction(ISD::STRICT_FDIV, VT, Legal); |
| 1927 | setOperationAction(ISD::FSQRT, VT, Legal); |
| 1928 | setOperationAction(ISD::STRICT_FSQRT, VT, Legal); |
| 1929 | |
| 1930 | setOperationAction(ISD::FFLOOR, VT, Legal); |
| 1931 | setOperationAction(ISD::STRICT_FFLOOR, VT, Legal); |
| 1932 | setOperationAction(ISD::FCEIL, VT, Legal); |
| 1933 | setOperationAction(ISD::STRICT_FCEIL, VT, Legal); |
| 1934 | setOperationAction(ISD::FTRUNC, VT, Legal); |
| 1935 | setOperationAction(ISD::STRICT_FTRUNC, VT, Legal); |
| 1936 | setOperationAction(ISD::FRINT, VT, Legal); |
| 1937 | setOperationAction(ISD::STRICT_FRINT, VT, Legal); |
| 1938 | setOperationAction(ISD::FNEARBYINT, VT, Legal); |
| 1939 | setOperationAction(ISD::STRICT_FNEARBYINT, VT, Legal); |
| 1940 | |
| 1941 | setOperationAction(ISD::LOAD, VT, Legal); |
| 1942 | setOperationAction(ISD::STORE, VT, Legal); |
| 1943 | |
| 1944 | setOperationAction(ISD::FMA, VT, Legal); |
| 1945 | setOperationAction(ISD::STRICT_FMA, VT, Legal); |
| 1946 | setOperationAction(ISD::VSELECT, VT, Legal); |
| 1947 | setOperationAction(ISD::BUILD_VECTOR, VT, Custom); |
| 1948 | setOperationAction(ISD::SELECT, VT, Custom); |
| 1949 | |
| 1950 | setOperationAction(ISD::FNEG, VT, Custom); |
| 1951 | setOperationAction(ISD::FABS, VT, Custom); |
| 1952 | setOperationAction(ISD::FCOPYSIGN, VT, Custom); |
| 1953 | setOperationAction(ISD::EXTRACT_VECTOR_ELT, VT, Custom); |
| 1954 | setOperationAction(ISD::VECTOR_SHUFFLE, VT, Custom); |
| 1955 | }; |
| 1956 | |
| 1957 | // AVX512_FP16 scalar operations |
| 1958 | setGroup(MVT::f16); |
| 1959 | addRegisterClass(MVT::f16, &X86::FR16XRegClass); |
| 1960 | setOperationAction(ISD::FREM, MVT::f16, Promote); |
| 1961 | setOperationAction(ISD::STRICT_FREM, MVT::f16, Promote); |
| 1962 | setOperationAction(ISD::SELECT_CC, MVT::f16, Expand); |
| 1963 | setOperationAction(ISD::BR_CC, MVT::f16, Expand); |
| 1964 | setOperationAction(ISD::SETCC, MVT::f16, Custom); |
| 1965 | setOperationAction(ISD::STRICT_FSETCC, MVT::f16, Custom); |
| 1966 | setOperationAction(ISD::STRICT_FSETCCS, MVT::f16, Custom); |
| 1967 | setOperationAction(ISD::FROUND, MVT::f16, Custom); |
| 1968 | setOperationAction(ISD::STRICT_FROUND, MVT::f16, Promote); |
| 1969 | setOperationAction(ISD::FROUNDEVEN, MVT::f16, Legal); |
| 1970 | setOperationAction(ISD::STRICT_FROUNDEVEN, MVT::f16, Legal); |
| 1971 | setOperationAction(ISD::FP_ROUND, MVT::f16, Custom); |
| 1972 | setOperationAction(ISD::STRICT_FP_ROUND, MVT::f16, Custom); |
| 1973 | setOperationAction(ISD::STRICT_FP_EXTEND, MVT::f32, Legal); |
| 1974 | if (isTypeLegal(MVT::f80)) { |
| 1975 | setOperationAction(ISD::FP_EXTEND, MVT::f80, Custom); |
| 1976 | setOperationAction(ISD::STRICT_FP_EXTEND, MVT::f80, Custom); |
| 1977 | } |
| 1978 | |
| 1979 | setCondCodeAction(ISD::SETOEQ, MVT::f16, Expand); |
| 1980 | setCondCodeAction(ISD::SETUNE, MVT::f16, Expand); |
| 1981 | |
| 1982 | if (Subtarget.useAVX512Regs()) { |
| 1983 | setGroup(MVT::v32f16); |
| 1984 | addRegisterClass(MVT::v32f16, &X86::VR512RegClass); |
| 1985 | setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v32f16, Custom); |
| 1986 | setOperationAction(ISD::SINT_TO_FP, MVT::v32i16, Legal); |
| 1987 | setOperationAction(ISD::STRICT_SINT_TO_FP, MVT::v32i16, Legal); |
| 1988 | setOperationAction(ISD::UINT_TO_FP, MVT::v32i16, Legal); |
| 1989 | setOperationAction(ISD::STRICT_UINT_TO_FP, MVT::v32i16, Legal); |
| 1990 | setOperationAction(ISD::STRICT_FP_ROUND, MVT::v16f16, Legal); |
| 1991 | setOperationAction(ISD::STRICT_FP_EXTEND, MVT::v16f32, Legal); |
| 1992 | setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v32f16, Custom); |
| 1993 | |
| 1994 | setOperationAction(ISD::FP_TO_SINT, MVT::v32i16, Custom); |
| 1995 | setOperationAction(ISD::STRICT_FP_TO_SINT, MVT::v32i16, Custom); |
| 1996 | setOperationAction(ISD::FP_TO_UINT, MVT::v32i16, Custom); |
| 1997 | setOperationAction(ISD::STRICT_FP_TO_UINT, MVT::v32i16, Custom); |
| 1998 | setOperationPromotedToType(ISD::FP_TO_SINT, MVT::v32i8, MVT::v32i16); |
| 1999 | setOperationPromotedToType(ISD::STRICT_FP_TO_SINT, MVT::v32i8, |
| 2000 | MVT::v32i16); |
| 2001 | setOperationPromotedToType(ISD::FP_TO_UINT, MVT::v32i8, MVT::v32i16); |
| 2002 | setOperationPromotedToType(ISD::STRICT_FP_TO_UINT, MVT::v32i8, |
| 2003 | MVT::v32i16); |
| 2004 | setOperationPromotedToType(ISD::FP_TO_SINT, MVT::v32i1, MVT::v32i16); |
| 2005 | setOperationPromotedToType(ISD::STRICT_FP_TO_SINT, MVT::v32i1, |
| 2006 | MVT::v32i16); |
| 2007 | setOperationPromotedToType(ISD::FP_TO_UINT, MVT::v32i1, MVT::v32i16); |
| 2008 | setOperationPromotedToType(ISD::STRICT_FP_TO_UINT, MVT::v32i1, |
| 2009 | MVT::v32i16); |
| 2010 | |
| 2011 | setOperationAction(ISD::EXTRACT_SUBVECTOR, MVT::v16f16, Legal); |
| 2012 | setOperationAction(ISD::INSERT_SUBVECTOR, MVT::v32f16, Legal); |
| 2013 | setOperationAction(ISD::CONCAT_VECTORS, MVT::v32f16, Custom); |
| 2014 | |
| 2015 | setLoadExtAction(ISD::EXTLOAD, MVT::v8f64, MVT::v8f16, Legal); |
| 2016 | setLoadExtAction(ISD::EXTLOAD, MVT::v16f32, MVT::v16f16, Legal); |
| 2017 | |
| 2018 | setOperationAction(ISD::STRICT_FSETCC, MVT::v32i1, Custom); |
| 2019 | setOperationAction(ISD::STRICT_FSETCCS, MVT::v32i1, Custom); |
| 2020 | } |
| 2021 | |
| 2022 | if (Subtarget.hasVLX()) { |
| 2023 | addRegisterClass(MVT::v8f16, &X86::VR128XRegClass); |
| 2024 | addRegisterClass(MVT::v16f16, &X86::VR256XRegClass); |
| 2025 | setGroup(MVT::v8f16); |
| 2026 | setGroup(MVT::v16f16); |
| 2027 | |
| 2028 | setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v8f16, Legal); |
| 2029 | setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v16f16, Custom); |
| 2030 | setOperationAction(ISD::SINT_TO_FP, MVT::v16i16, Legal); |
| 2031 | setOperationAction(ISD::STRICT_SINT_TO_FP, MVT::v16i16, Legal); |
| 2032 | setOperationAction(ISD::SINT_TO_FP, MVT::v8i16, Legal); |
| 2033 | setOperationAction(ISD::STRICT_SINT_TO_FP, MVT::v8i16, Legal); |
| 2034 | setOperationAction(ISD::UINT_TO_FP, MVT::v16i16, Legal); |
| 2035 | setOperationAction(ISD::STRICT_UINT_TO_FP, MVT::v16i16, Legal); |
| 2036 | setOperationAction(ISD::UINT_TO_FP, MVT::v8i16, Legal); |
| 2037 | setOperationAction(ISD::STRICT_UINT_TO_FP, MVT::v8i16, Legal); |
| 2038 | |
| 2039 | setOperationAction(ISD::FP_TO_SINT, MVT::v8i16, Custom); |
| 2040 | setOperationAction(ISD::STRICT_FP_TO_SINT, MVT::v8i16, Custom); |
| 2041 | setOperationAction(ISD::FP_TO_UINT, MVT::v8i16, Custom); |
| 2042 | setOperationAction(ISD::STRICT_FP_TO_UINT, MVT::v8i16, Custom); |
| 2043 | setOperationAction(ISD::STRICT_FP_ROUND, MVT::v8f16, Legal); |
| 2044 | setOperationAction(ISD::STRICT_FP_EXTEND, MVT::v8f32, Legal); |
| 2045 | |
| 2046 | // INSERT_VECTOR_ELT v8f16 extended to VECTOR_SHUFFLE |
| 2047 | setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v8f16, Custom); |
| 2048 | setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v16f16, Custom); |
| 2049 | |
| 2050 | setOperationAction(ISD::EXTRACT_SUBVECTOR, MVT::v8f16, Legal); |
| 2051 | setOperationAction(ISD::INSERT_SUBVECTOR, MVT::v16f16, Legal); |
| 2052 | setOperationAction(ISD::CONCAT_VECTORS, MVT::v16f16, Custom); |
| 2053 | |
| 2054 | setLoadExtAction(ISD::EXTLOAD, MVT::v4f64, MVT::v4f16, Legal); |
| 2055 | setLoadExtAction(ISD::EXTLOAD, MVT::v2f64, MVT::v2f16, Legal); |
| 2056 | setLoadExtAction(ISD::EXTLOAD, MVT::v8f32, MVT::v8f16, Legal); |
| 2057 | setLoadExtAction(ISD::EXTLOAD, MVT::v4f32, MVT::v4f16, Legal); |
| 2058 | |
| 2059 | // Need to custom widen these to prevent scalarization. |
| 2060 | setOperationAction(ISD::LOAD, MVT::v4f16, Custom); |
| 2061 | setOperationAction(ISD::STORE, MVT::v4f16, Custom); |
| 2062 | } |
| 2063 | |
| 2064 | // Support fp16 0 immediate |
| 2065 | addLegalFPImmediate(APFloat::getZero(APFloat::IEEEhalf())); |
| 2066 | } |
| 2067 | |
| 2068 | if (!Subtarget.useSoftFloat() && Subtarget.hasVLX()) { |
| 2069 | setTruncStoreAction(MVT::v4i64, MVT::v4i8, Legal); |
| 2070 | setTruncStoreAction(MVT::v4i64, MVT::v4i16, Legal); |
| 2071 | setTruncStoreAction(MVT::v4i64, MVT::v4i32, Legal); |
| 2072 | setTruncStoreAction(MVT::v8i32, MVT::v8i8, Legal); |
| 2073 | setTruncStoreAction(MVT::v8i32, MVT::v8i16, Legal); |
| 2074 | |
| 2075 | setTruncStoreAction(MVT::v2i64, MVT::v2i8, Legal); |
| 2076 | setTruncStoreAction(MVT::v2i64, MVT::v2i16, Legal); |
| 2077 | setTruncStoreAction(MVT::v2i64, MVT::v2i32, Legal); |
| 2078 | setTruncStoreAction(MVT::v4i32, MVT::v4i8, Legal); |
| 2079 | setTruncStoreAction(MVT::v4i32, MVT::v4i16, Legal); |
| 2080 | |
| 2081 | if (Subtarget.hasBWI()) { |
| 2082 | setTruncStoreAction(MVT::v16i16, MVT::v16i8, Legal); |
| 2083 | setTruncStoreAction(MVT::v8i16, MVT::v8i8, Legal); |
| 2084 | } |
| 2085 | |
| 2086 | if (Subtarget.hasFP16()) { |
| 2087 | // vcvttph2[u]dq v4f16 -> v4i32/64, v2f16 -> v2i32/64 |
| 2088 | setOperationAction(ISD::FP_TO_SINT, MVT::v2f16, Custom); |
| 2089 | setOperationAction(ISD::STRICT_FP_TO_SINT, MVT::v2f16, Custom); |
| 2090 | setOperationAction(ISD::FP_TO_UINT, MVT::v2f16, Custom); |
| 2091 | setOperationAction(ISD::STRICT_FP_TO_UINT, MVT::v2f16, Custom); |
| 2092 | setOperationAction(ISD::FP_TO_SINT, MVT::v4f16, Custom); |
| 2093 | setOperationAction(ISD::STRICT_FP_TO_SINT, MVT::v4f16, Custom); |
| 2094 | setOperationAction(ISD::FP_TO_UINT, MVT::v4f16, Custom); |
| 2095 | setOperationAction(ISD::STRICT_FP_TO_UINT, MVT::v4f16, Custom); |
| 2096 | // vcvt[u]dq2ph v4i32/64 -> v4f16, v2i32/64 -> v2f16 |
| 2097 | setOperationAction(ISD::SINT_TO_FP, MVT::v2f16, Custom); |
| 2098 | setOperationAction(ISD::STRICT_SINT_TO_FP, MVT::v2f16, Custom); |
| 2099 | setOperationAction(ISD::UINT_TO_FP, MVT::v2f16, Custom); |
| 2100 | setOperationAction(ISD::STRICT_UINT_TO_FP, MVT::v2f16, Custom); |
| 2101 | setOperationAction(ISD::SINT_TO_FP, MVT::v4f16, Custom); |
| 2102 | setOperationAction(ISD::STRICT_SINT_TO_FP, MVT::v4f16, Custom); |
| 2103 | setOperationAction(ISD::UINT_TO_FP, MVT::v4f16, Custom); |
| 2104 | setOperationAction(ISD::STRICT_UINT_TO_FP, MVT::v4f16, Custom); |
| 2105 | // vcvtps2phx v4f32 -> v4f16, v2f32 -> v2f16 |
| 2106 | setOperationAction(ISD::FP_ROUND, MVT::v2f16, Custom); |
| 2107 | setOperationAction(ISD::STRICT_FP_ROUND, MVT::v2f16, Custom); |
| 2108 | setOperationAction(ISD::FP_ROUND, MVT::v4f16, Custom); |
| 2109 | setOperationAction(ISD::STRICT_FP_ROUND, MVT::v4f16, Custom); |
| 2110 | // vcvtph2psx v4f16 -> v4f32, v2f16 -> v2f32 |
| 2111 | setOperationAction(ISD::FP_EXTEND, MVT::v2f16, Custom); |
| 2112 | setOperationAction(ISD::STRICT_FP_EXTEND, MVT::v2f16, Custom); |
| 2113 | setOperationAction(ISD::FP_EXTEND, MVT::v4f16, Custom); |
| 2114 | setOperationAction(ISD::STRICT_FP_EXTEND, MVT::v4f16, Custom); |
| 2115 | } |
| 2116 | |
| 2117 | setOperationAction(ISD::TRUNCATE, MVT::v16i32, Custom); |
| 2118 | setOperationAction(ISD::TRUNCATE, MVT::v8i64, Custom); |
| 2119 | setOperationAction(ISD::TRUNCATE, MVT::v16i64, Custom); |
| 2120 | } |
| 2121 | |
| 2122 | if (Subtarget.hasAMXTILE()) { |
| 2123 | addRegisterClass(MVT::x86amx, &X86::TILERegClass); |
| 2124 | } |
| 2125 | |
| 2126 | // We want to custom lower some of our intrinsics. |
| 2127 | setOperationAction(ISD::INTRINSIC_WO_CHAIN, MVT::Other, Custom); |
| 2128 | setOperationAction(ISD::INTRINSIC_W_CHAIN, MVT::Other, Custom); |
| 2129 | setOperationAction(ISD::INTRINSIC_VOID, MVT::Other, Custom); |
| 2130 | if (!Subtarget.is64Bit()) { |
| 2131 | setOperationAction(ISD::INTRINSIC_W_CHAIN, MVT::i64, Custom); |
| 2132 | } |
| 2133 | |
| 2134 | // Only custom-lower 64-bit SADDO and friends on 64-bit because we don't |
| 2135 | // handle type legalization for these operations here. |
| 2136 | // |
| 2137 | // FIXME: We really should do custom legalization for addition and |
| 2138 | // subtraction on x86-32 once PR3203 is fixed. We really can't do much better |
| 2139 | // than generic legalization for 64-bit multiplication-with-overflow, though. |
| 2140 | for (auto VT : { MVT::i8, MVT::i16, MVT::i32, MVT::i64 }) { |
| 2141 | if (VT == MVT::i64 && !Subtarget.is64Bit()) |
| 2142 | continue; |
| 2143 | // Add/Sub/Mul with overflow operations are custom lowered. |
| 2144 | setOperationAction(ISD::SADDO, VT, Custom); |
| 2145 | setOperationAction(ISD::UADDO, VT, Custom); |
| 2146 | setOperationAction(ISD::SSUBO, VT, Custom); |
| 2147 | setOperationAction(ISD::USUBO, VT, Custom); |
| 2148 | setOperationAction(ISD::SMULO, VT, Custom); |
| 2149 | setOperationAction(ISD::UMULO, VT, Custom); |
| 2150 | |
| 2151 | // Support carry in as value rather than glue. |
| 2152 | setOperationAction(ISD::ADDCARRY, VT, Custom); |
| 2153 | setOperationAction(ISD::SUBCARRY, VT, Custom); |
| 2154 | setOperationAction(ISD::SETCCCARRY, VT, Custom); |
| 2155 | setOperationAction(ISD::SADDO_CARRY, VT, Custom); |
| 2156 | setOperationAction(ISD::SSUBO_CARRY, VT, Custom); |
| 2157 | } |
| 2158 | |
| 2159 | if (!Subtarget.is64Bit()) { |
| 2160 | // These libcalls are not available in 32-bit. |
| 2161 | setLibcallName(RTLIB::SHL_I128, nullptr); |
| 2162 | setLibcallName(RTLIB::SRL_I128, nullptr); |
| 2163 | setLibcallName(RTLIB::SRA_I128, nullptr); |
| 2164 | setLibcallName(RTLIB::MUL_I128, nullptr); |
| 2165 | // The MULO libcall is not part of libgcc, only compiler-rt. |
| 2166 | setLibcallName(RTLIB::MULO_I64, nullptr); |
| 2167 | } |
| 2168 | // The MULO libcall is not part of libgcc, only compiler-rt. |
| 2169 | setLibcallName(RTLIB::MULO_I128, nullptr); |
| 2170 | |
| 2171 | // Combine sin / cos into _sincos_stret if it is available. |
| 2172 | if (getLibcallName(RTLIB::SINCOS_STRET_F32) != nullptr && |
| 2173 | getLibcallName(RTLIB::SINCOS_STRET_F64) != nullptr) { |
| 2174 | setOperationAction(ISD::FSINCOS, MVT::f64, Custom); |
| 2175 | setOperationAction(ISD::FSINCOS, MVT::f32, Custom); |
| 2176 | } |
| 2177 | |
| 2178 | if (Subtarget.isTargetWin64()) { |
| 2179 | setOperationAction(ISD::SDIV, MVT::i128, Custom); |
| 2180 | setOperationAction(ISD::UDIV, MVT::i128, Custom); |
| 2181 | setOperationAction(ISD::SREM, MVT::i128, Custom); |
| 2182 | setOperationAction(ISD::UREM, MVT::i128, Custom); |
| 2183 | setOperationAction(ISD::FP_TO_SINT, MVT::i128, Custom); |
| 2184 | setOperationAction(ISD::FP_TO_UINT, MVT::i128, Custom); |
| 2185 | setOperationAction(ISD::SINT_TO_FP, MVT::i128, Custom); |
| 2186 | setOperationAction(ISD::UINT_TO_FP, MVT::i128, Custom); |
| 2187 | setOperationAction(ISD::STRICT_FP_TO_SINT, MVT::i128, Custom); |
| 2188 | setOperationAction(ISD::STRICT_FP_TO_UINT, MVT::i128, Custom); |
| 2189 | setOperationAction(ISD::STRICT_SINT_TO_FP, MVT::i128, Custom); |
| 2190 | setOperationAction(ISD::STRICT_UINT_TO_FP, MVT::i128, Custom); |
| 2191 | } |
| 2192 | |
| 2193 | // On 32 bit MSVC, `fmodf(f32)` is not defined - only `fmod(f64)` |
| 2194 | // is. We should promote the value to 64-bits to solve this. |
| 2195 | // This is what the CRT headers do - `fmodf` is an inline header |
| 2196 | // function casting to f64 and calling `fmod`. |
| 2197 | if (Subtarget.is32Bit() && |
| 2198 | (Subtarget.isTargetWindowsMSVC() || Subtarget.isTargetWindowsItanium())) |
| 2199 | for (ISD::NodeType Op : |
| 2200 | {ISD::FCEIL, ISD::STRICT_FCEIL, |
| 2201 | ISD::FCOS, ISD::STRICT_FCOS, |
| 2202 | ISD::FEXP, ISD::STRICT_FEXP, |
| 2203 | ISD::FFLOOR, ISD::STRICT_FFLOOR, |
| 2204 | ISD::FREM, ISD::STRICT_FREM, |
| 2205 | ISD::FLOG, ISD::STRICT_FLOG, |
| 2206 | ISD::FLOG10, ISD::STRICT_FLOG10, |
| 2207 | ISD::FPOW, ISD::STRICT_FPOW, |
| 2208 | ISD::FSIN, ISD::STRICT_FSIN}) |
| 2209 | if (isOperationExpand(Op, MVT::f32)) |
| 2210 | setOperationAction(Op, MVT::f32, Promote); |
| 2211 | |
| 2212 | // We have target-specific dag combine patterns for the following nodes: |
| 2213 | setTargetDAGCombine({ISD::VECTOR_SHUFFLE, |
| 2214 | ISD::SCALAR_TO_VECTOR, |
| 2215 | ISD::INSERT_VECTOR_ELT, |
| 2216 | ISD::EXTRACT_VECTOR_ELT, |
| 2217 | ISD::CONCAT_VECTORS, |
| 2218 | ISD::INSERT_SUBVECTOR, |
| 2219 | ISD::EXTRACT_SUBVECTOR, |
| 2220 | ISD::BITCAST, |
| 2221 | ISD::VSELECT, |
| 2222 | ISD::SELECT, |
| 2223 | ISD::SHL, |
| 2224 | ISD::SRA, |
| 2225 | ISD::SRL, |
| 2226 | ISD::OR, |
| 2227 | ISD::AND, |
| 2228 | ISD::ADD, |
| 2229 | ISD::FADD, |
| 2230 | ISD::FSUB, |
| 2231 | ISD::FNEG, |
| 2232 | ISD::FMA, |
| 2233 | ISD::STRICT_FMA, |
| 2234 | ISD::FMINNUM, |
| 2235 | ISD::FMAXNUM, |
| 2236 | ISD::SUB, |
| 2237 | ISD::LOAD, |
| 2238 | ISD::MLOAD, |
| 2239 | ISD::STORE, |
| 2240 | ISD::MSTORE, |
| 2241 | ISD::TRUNCATE, |
| 2242 | ISD::ZERO_EXTEND, |
| 2243 | ISD::ANY_EXTEND, |
| 2244 | ISD::SIGN_EXTEND, |
| 2245 | ISD::SIGN_EXTEND_INREG, |
| 2246 | ISD::ANY_EXTEND_VECTOR_INREG, |
| 2247 | ISD::SIGN_EXTEND_VECTOR_INREG, |
| 2248 | ISD::ZERO_EXTEND_VECTOR_INREG, |
| 2249 | ISD::SINT_TO_FP, |
| 2250 | ISD::UINT_TO_FP, |
| 2251 | ISD::STRICT_SINT_TO_FP, |
| 2252 | ISD::STRICT_UINT_TO_FP, |
| 2253 | ISD::SETCC, |
| 2254 | ISD::MUL, |
| 2255 | ISD::XOR, |
| 2256 | ISD::MSCATTER, |
| 2257 | ISD::MGATHER, |
| 2258 | ISD::FP16_TO_FP, |
| 2259 | ISD::FP_EXTEND, |
| 2260 | ISD::STRICT_FP_EXTEND, |
| 2261 | ISD::FP_ROUND}); |
| 2262 | |
| 2263 | computeRegisterProperties(Subtarget.getRegisterInfo()); |
| 2264 | |
| 2265 | MaxStoresPerMemset = 16; // For @llvm.memset -> sequence of stores |
| 2266 | MaxStoresPerMemsetOptSize = 8; |
| 2267 | MaxStoresPerMemcpy = 8; // For @llvm.memcpy -> sequence of stores |
| 2268 | MaxStoresPerMemcpyOptSize = 4; |
| 2269 | MaxStoresPerMemmove = 8; // For @llvm.memmove -> sequence of stores |
| 2270 | MaxStoresPerMemmoveOptSize = 4; |
| 2271 | |
| 2272 | // TODO: These control memcmp expansion in CGP and could be raised higher, but |
| 2273 | // that needs to benchmarked and balanced with the potential use of vector |
| 2274 | // load/store types (PR33329, PR33914). |
| 2275 | MaxLoadsPerMemcmp = 2; |
| 2276 | MaxLoadsPerMemcmpOptSize = 2; |
| 2277 | |
| 2278 | // Default loop alignment, which can be overridden by -align-loops. |
| 2279 | setPrefLoopAlignment(Align(16)); |
| 2280 | |
| 2281 | // An out-of-order CPU can speculatively execute past a predictable branch, |
| 2282 | // but a conditional move could be stalled by an expensive earlier operation. |
| 2283 | PredictableSelectIsExpensive = Subtarget.getSchedModel().isOutOfOrder(); |
| 2284 | EnableExtLdPromotion = true; |
| 2285 | setPrefFunctionAlignment(Align(16)); |
| 2286 | |
| 2287 | verifyIntrinsicTables(); |
| 2288 | |
| 2289 | // Default to having -disable-strictnode-mutation on |
| 2290 | IsStrictFPEnabled = true; |
| 2291 | } |
| 2292 | |
| 2293 | // This has so far only been implemented for 64-bit MachO. |
| 2294 | bool X86TargetLowering::useLoadStackGuardNode() const { |
| 2295 | return Subtarget.isTargetMachO() && Subtarget.is64Bit(); |
| 2296 | } |
| 2297 | |
| 2298 | bool X86TargetLowering::useStackGuardXorFP() const { |
| 2299 | // Currently only MSVC CRTs XOR the frame pointer into the stack guard value. |
| 2300 | return Subtarget.getTargetTriple().isOSMSVCRT() && !Subtarget.isTargetMachO(); |
| 2301 | } |
| 2302 | |
| 2303 | SDValue X86TargetLowering::emitStackGuardXorFP(SelectionDAG &DAG, SDValue Val, |
| 2304 | const SDLoc &DL) const { |
| 2305 | EVT PtrTy = getPointerTy(DAG.getDataLayout()); |
| 2306 | unsigned XorOp = Subtarget.is64Bit() ? X86::XOR64_FP : X86::XOR32_FP; |
| 2307 | MachineSDNode *Node = DAG.getMachineNode(XorOp, DL, PtrTy, Val); |
| 2308 | return SDValue(Node, 0); |
| 2309 | } |
| 2310 | |
| 2311 | TargetLoweringBase::LegalizeTypeAction |
| 2312 | X86TargetLowering::getPreferredVectorAction(MVT VT) const { |
| 2313 | if ((VT == MVT::v32i1 || VT == MVT::v64i1) && Subtarget.hasAVX512() && |
| 2314 | !Subtarget.hasBWI()) |
| 2315 | return TypeSplitVector; |
| 2316 | |
| 2317 | if (!VT.isScalableVector() && VT.getVectorNumElements() != 1 && |
| 2318 | VT.getVectorElementType() != MVT::i1) |
| 2319 | return TypeWidenVector; |
| 2320 | |
| 2321 | return TargetLoweringBase::getPreferredVectorAction(VT); |
| 2322 | } |
| 2323 | |
| 2324 | static std::pair<MVT, unsigned> |
| 2325 | handleMaskRegisterForCallingConv(unsigned NumElts, CallingConv::ID CC, |
| 2326 | const X86Subtarget &Subtarget) { |
| 2327 | // v2i1/v4i1/v8i1/v16i1 all pass in xmm registers unless the calling |
| 2328 | // convention is one that uses k registers. |
| 2329 | if (NumElts == 2) |
| 2330 | return {MVT::v2i64, 1}; |
| 2331 | if (NumElts == 4) |
| 2332 | return {MVT::v4i32, 1}; |
| 2333 | if (NumElts == 8 && CC != CallingConv::X86_RegCall && |
| 2334 | CC != CallingConv::Intel_OCL_BI) |
| 2335 | return {MVT::v8i16, 1}; |
| 2336 | if (NumElts == 16 && CC != CallingConv::X86_RegCall && |
| 2337 | CC != CallingConv::Intel_OCL_BI) |
| 2338 | return {MVT::v16i8, 1}; |
| 2339 | // v32i1 passes in ymm unless we have BWI and the calling convention is |
| 2340 | // regcall. |
| 2341 | if (NumElts == 32 && (!Subtarget.hasBWI() || CC != CallingConv::X86_RegCall)) |
| 2342 | return {MVT::v32i8, 1}; |
| 2343 | // Split v64i1 vectors if we don't have v64i8 available. |
| 2344 | if (NumElts == 64 && Subtarget.hasBWI() && CC != CallingConv::X86_RegCall) { |
| 2345 | if (Subtarget.useAVX512Regs()) |
| 2346 | return {MVT::v64i8, 1}; |
| 2347 | return {MVT::v32i8, 2}; |
| 2348 | } |
| 2349 | |
| 2350 | // Break wide or odd vXi1 vectors into scalars to match avx2 behavior. |
| 2351 | if (!isPowerOf2_32(NumElts) || (NumElts == 64 && !Subtarget.hasBWI()) || |
| 2352 | NumElts > 64) |
| 2353 | return {MVT::i8, NumElts}; |
| 2354 | |
| 2355 | return {MVT::INVALID_SIMPLE_VALUE_TYPE, 0}; |
| 2356 | } |
| 2357 | |
| 2358 | MVT X86TargetLowering::getRegisterTypeForCallingConv(LLVMContext &Context, |
| 2359 | CallingConv::ID CC, |
| 2360 | EVT VT) const { |
| 2361 | if (VT.isVector() && VT.getVectorElementType() == MVT::i1 && |
| 2362 | Subtarget.hasAVX512()) { |
| 2363 | unsigned NumElts = VT.getVectorNumElements(); |
| 2364 | |
| 2365 | MVT RegisterVT; |
| 2366 | unsigned NumRegisters; |
| 2367 | std::tie(RegisterVT, NumRegisters) = |
| 2368 | handleMaskRegisterForCallingConv(NumElts, CC, Subtarget); |
| 2369 | if (RegisterVT != MVT::INVALID_SIMPLE_VALUE_TYPE) |
| 2370 | return RegisterVT; |
| 2371 | } |
| 2372 | |
| 2373 | // v3f16 will be widen to v4f16. But we don't assign register class for v4f16. |
| 2374 | // So its default register type is f16. We override the type to v8f16 here. |
| 2375 | if (VT == MVT::v3f16 && Subtarget.hasFP16()) |
| 2376 | return MVT::v8f16; |
| 2377 | |
| 2378 | // We will use more GPRs for f64 and f80 on 32 bits when x87 is disabled. |
| 2379 | if ((VT == MVT::f64 || VT == MVT::f80) && !Subtarget.is64Bit() && |
| 2380 | !Subtarget.hasX87()) |
| 2381 | return MVT::i32; |
| 2382 | |
| 2383 | return TargetLowering::getRegisterTypeForCallingConv(Context, CC, VT); |
| 2384 | } |
| 2385 | |
| 2386 | unsigned X86TargetLowering::getNumRegistersForCallingConv(LLVMContext &Context, |
| 2387 | CallingConv::ID CC, |
| 2388 | EVT VT) const { |
| 2389 | if (VT.isVector() && VT.getVectorElementType() == MVT::i1 && |
| 2390 | Subtarget.hasAVX512()) { |
| 2391 | unsigned NumElts = VT.getVectorNumElements(); |
| 2392 | |
| 2393 | MVT RegisterVT; |
| 2394 | unsigned NumRegisters; |
| 2395 | std::tie(RegisterVT, NumRegisters) = |
| 2396 | handleMaskRegisterForCallingConv(NumElts, CC, Subtarget); |
| 2397 | if (RegisterVT != MVT::INVALID_SIMPLE_VALUE_TYPE) |
| 2398 | return NumRegisters; |
| 2399 | } |
| 2400 | |
| 2401 | // v3f16 will be widen to v4f16. But we don't assign register class for v4f16. |
| 2402 | // So its default register number is 3. We override the number to 1 here. |
| 2403 | if (VT == MVT::v3f16 && Subtarget.hasFP16()) |
| 2404 | return 1; |
| 2405 | |
| 2406 | // We have to split f64 to 2 registers and f80 to 3 registers on 32 bits if |
| 2407 | // x87 is disabled. |
| 2408 | if (!Subtarget.is64Bit() && !Subtarget.hasX87()) { |
| 2409 | if (VT == MVT::f64) |
| 2410 | return 2; |
| 2411 | if (VT == MVT::f80) |
| 2412 | return 3; |
| 2413 | } |
| 2414 | |
| 2415 | return TargetLowering::getNumRegistersForCallingConv(Context, CC, VT); |
| 2416 | } |
| 2417 | |
| 2418 | unsigned X86TargetLowering::getVectorTypeBreakdownForCallingConv( |
| 2419 | LLVMContext &Context, CallingConv::ID CC, EVT VT, EVT &IntermediateVT, |
| 2420 | unsigned &NumIntermediates, MVT &RegisterVT) const { |
| 2421 | // Break wide or odd vXi1 vectors into scalars to match avx2 behavior. |
| 2422 | if (VT.isVector() && VT.getVectorElementType() == MVT::i1 && |
| 2423 | Subtarget.hasAVX512() && |
| 2424 | (!isPowerOf2_32(VT.getVectorNumElements()) || |
| 2425 | (VT.getVectorNumElements() == 64 && !Subtarget.hasBWI()) || |
| 2426 | VT.getVectorNumElements() > 64)) { |
| 2427 | RegisterVT = MVT::i8; |
| 2428 | IntermediateVT = MVT::i1; |
| 2429 | NumIntermediates = VT.getVectorNumElements(); |
| 2430 | return NumIntermediates; |
| 2431 | } |
| 2432 | |
| 2433 | // Split v64i1 vectors if we don't have v64i8 available. |
| 2434 | if (VT == MVT::v64i1 && Subtarget.hasBWI() && !Subtarget.useAVX512Regs() && |
| 2435 | CC != CallingConv::X86_RegCall) { |
| 2436 | RegisterVT = MVT::v32i8; |
| 2437 | IntermediateVT = MVT::v32i1; |
| 2438 | NumIntermediates = 2; |
| 2439 | return 2; |
| 2440 | } |
| 2441 | |
| 2442 | return TargetLowering::getVectorTypeBreakdownForCallingConv(Context, CC, VT, IntermediateVT, |
| 2443 | NumIntermediates, RegisterVT); |
| 2444 | } |
| 2445 | |
| 2446 | EVT X86TargetLowering::getSetCCResultType(const DataLayout &DL, |
| 2447 | LLVMContext& Context, |
| 2448 | EVT VT) const { |
| 2449 | if (!VT.isVector()) |
| 2450 | return MVT::i8; |
| 2451 | |
| 2452 | if (Subtarget.hasAVX512()) { |
| 2453 | // Figure out what this type will be legalized to. |
| 2454 | EVT LegalVT = VT; |
| 2455 | while (getTypeAction(Context, LegalVT) != TypeLegal) |
| 2456 | LegalVT = getTypeToTransformTo(Context, LegalVT); |
| 2457 | |
| 2458 | // If we got a 512-bit vector then we'll definitely have a vXi1 compare. |
| 2459 | if (LegalVT.getSimpleVT().is512BitVector()) |
| 2460 | return EVT::getVectorVT(Context, MVT::i1, VT.getVectorElementCount()); |
| 2461 | |
| 2462 | if (LegalVT.getSimpleVT().isVector() && Subtarget.hasVLX()) { |
| 2463 | // If we legalized to less than a 512-bit vector, then we will use a vXi1 |
| 2464 | // compare for vXi32/vXi64 for sure. If we have BWI we will also support |
| 2465 | // vXi16/vXi8. |
| 2466 | MVT EltVT = LegalVT.getSimpleVT().getVectorElementType(); |
| 2467 | if (Subtarget.hasBWI() || EltVT.getSizeInBits() >= 32) |
| 2468 | return EVT::getVectorVT(Context, MVT::i1, VT.getVectorElementCount()); |
| 2469 | } |
| 2470 | } |
| 2471 | |
| 2472 | return VT.changeVectorElementTypeToInteger(); |
| 2473 | } |
| 2474 | |
| 2475 | /// Helper for getByValTypeAlignment to determine |
| 2476 | /// the desired ByVal argument alignment. |
| 2477 | static void getMaxByValAlign(Type *Ty, Align &MaxAlign) { |
| 2478 | if (MaxAlign == 16) |
| 2479 | return; |
| 2480 | if (VectorType *VTy = dyn_cast<VectorType>(Ty)) { |
| 2481 | if (VTy->getPrimitiveSizeInBits().getFixedSize() == 128) |
| 2482 | MaxAlign = Align(16); |
| 2483 | } else if (ArrayType *ATy = dyn_cast<ArrayType>(Ty)) { |
| 2484 | Align EltAlign; |
| 2485 | getMaxByValAlign(ATy->getElementType(), EltAlign); |
| 2486 | if (EltAlign > MaxAlign) |
| 2487 | MaxAlign = EltAlign; |
| 2488 | } else if (StructType *STy = dyn_cast<StructType>(Ty)) { |
| 2489 | for (auto *EltTy : STy->elements()) { |
| 2490 | Align EltAlign; |
| 2491 | getMaxByValAlign(EltTy, EltAlign); |
| 2492 | if (EltAlign > MaxAlign) |
| 2493 | MaxAlign = EltAlign; |
| 2494 | if (MaxAlign == 16) |
| 2495 | break; |
| 2496 | } |
| 2497 | } |
| 2498 | } |
| 2499 | |
| 2500 | /// Return the desired alignment for ByVal aggregate |
| 2501 | /// function arguments in the caller parameter area. For X86, aggregates |
| 2502 | /// that contain SSE vectors are placed at 16-byte boundaries while the rest |
| 2503 | /// are at 4-byte boundaries. |
| 2504 | uint64_t X86TargetLowering::getByValTypeAlignment(Type *Ty, |
| 2505 | const DataLayout &DL) const { |
| 2506 | if (Subtarget.is64Bit()) { |
| 2507 | // Max of 8 and alignment of type. |
| 2508 | Align TyAlign = DL.getABITypeAlign(Ty); |
| 2509 | if (TyAlign > 8) |
| 2510 | return TyAlign.value(); |
| 2511 | return 8; |
| 2512 | } |
| 2513 | |
| 2514 | Align Alignment(4); |
| 2515 | if (Subtarget.hasSSE1()) |
| 2516 | getMaxByValAlign(Ty, Alignment); |
| 2517 | return Alignment.value(); |
| 2518 | } |
| 2519 | |
| 2520 | /// It returns EVT::Other if the type should be determined using generic |
| 2521 | /// target-independent logic. |
| 2522 | /// For vector ops we check that the overall size isn't larger than our |
| 2523 | /// preferred vector width. |
| 2524 | EVT X86TargetLowering::getOptimalMemOpType( |
| 2525 | const MemOp &Op, const AttributeList &FuncAttributes) const { |
| 2526 | if (!FuncAttributes.hasFnAttr(Attribute::NoImplicitFloat)) { |
| 2527 | if (Op.size() >= 16 && |
| 2528 | (!Subtarget.isUnalignedMem16Slow() || Op.isAligned(Align(16)))) { |
| 2529 | // FIXME: Check if unaligned 64-byte accesses are slow. |
| 2530 | if (Op.size() >= 64 && Subtarget.hasAVX512() && |
| 2531 | (Subtarget.getPreferVectorWidth() >= 512)) { |
| 2532 | return Subtarget.hasBWI() ? MVT::v64i8 : MVT::v16i32; |
| 2533 | } |
| 2534 | // FIXME: Check if unaligned 32-byte accesses are slow. |
| 2535 | if (Op.size() >= 32 && Subtarget.hasAVX() && |
| 2536 | (Subtarget.getPreferVectorWidth() >= 256)) { |
| 2537 | // Although this isn't a well-supported type for AVX1, we'll let |
| 2538 | // legalization and shuffle lowering produce the optimal codegen. If we |
| 2539 | // choose an optimal type with a vector element larger than a byte, |
| 2540 | // getMemsetStores() may create an intermediate splat (using an integer |
| 2541 | // multiply) before we splat as a vector. |
| 2542 | return MVT::v32i8; |
| 2543 | } |
| 2544 | if (Subtarget.hasSSE2() && (Subtarget.getPreferVectorWidth() >= 128)) |
| 2545 | return MVT::v16i8; |
| 2546 | // TODO: Can SSE1 handle a byte vector? |
| 2547 | // If we have SSE1 registers we should be able to use them. |
| 2548 | if (Subtarget.hasSSE1() && (Subtarget.is64Bit() || Subtarget.hasX87()) && |
| 2549 | (Subtarget.getPreferVectorWidth() >= 128)) |
| 2550 | return MVT::v4f32; |
| 2551 | } else if (((Op.isMemcpy() && !Op.isMemcpyStrSrc()) || Op.isZeroMemset()) && |
| 2552 | Op.size() >= 8 && !Subtarget.is64Bit() && Subtarget.hasSSE2()) { |
| 2553 | // Do not use f64 to lower memcpy if source is string constant. It's |
| 2554 | // better to use i32 to avoid the loads. |
| 2555 | // Also, do not use f64 to lower memset unless this is a memset of zeros. |
| 2556 | // The gymnastics of splatting a byte value into an XMM register and then |
| 2557 | // only using 8-byte stores (because this is a CPU with slow unaligned |
| 2558 | // 16-byte accesses) makes that a loser. |
| 2559 | return MVT::f64; |
| 2560 | } |
| 2561 | } |
| 2562 | // This is a compromise. If we reach here, unaligned accesses may be slow on |
| 2563 | // this target. However, creating smaller, aligned accesses could be even |
| 2564 | // slower and would certainly be a lot more code. |
| 2565 | if (Subtarget.is64Bit() && Op.size() >= 8) |
| 2566 | return MVT::i64; |
| 2567 | return MVT::i32; |
| 2568 | } |
| 2569 | |
| 2570 | bool X86TargetLowering::isSafeMemOpType(MVT VT) const { |
| 2571 | if (VT == MVT::f32) |
| 2572 | return Subtarget.hasSSE1(); |
| 2573 | if (VT == MVT::f64) |
| 2574 | return Subtarget.hasSSE2(); |
| 2575 | return true; |
| 2576 | } |
| 2577 | |
| 2578 | bool X86TargetLowering::allowsMisalignedMemoryAccesses( |
| 2579 | EVT VT, unsigned, Align Alignment, MachineMemOperand::Flags Flags, |
| 2580 | bool *Fast) const { |
| 2581 | if (Fast) { |
| 2582 | switch (VT.getSizeInBits()) { |
| 2583 | default: |
| 2584 | // 8-byte and under are always assumed to be fast. |
| 2585 | *Fast = true; |
| 2586 | break; |
| 2587 | case 128: |
| 2588 | *Fast = !Subtarget.isUnalignedMem16Slow(); |
| 2589 | break; |
| 2590 | case 256: |
| 2591 | *Fast = !Subtarget.isUnalignedMem32Slow(); |
| 2592 | break; |
| 2593 | // TODO: What about AVX-512 (512-bit) accesses? |
| 2594 | } |
| 2595 | } |
| 2596 | // NonTemporal vector memory ops must be aligned. |
| 2597 | if (!!(Flags & MachineMemOperand::MONonTemporal) && VT.isVector()) { |
| 2598 | // NT loads can only be vector aligned, so if its less aligned than the |
| 2599 | // minimum vector size (which we can split the vector down to), we might as |
| 2600 | // well use a regular unaligned vector load. |
| 2601 | // We don't have any NT loads pre-SSE41. |
| 2602 | if (!!(Flags & MachineMemOperand::MOLoad)) |
| 2603 | return (Alignment < 16 || !Subtarget.hasSSE41()); |
| 2604 | return false; |
| 2605 | } |
| 2606 | // Misaligned accesses of any size are always allowed. |
| 2607 | return true; |
| 2608 | } |
| 2609 | |
| 2610 | /// Return the entry encoding for a jump table in the |
| 2611 | /// current function. The returned value is a member of the |
| 2612 | /// MachineJumpTableInfo::JTEntryKind enum. |
| 2613 | unsigned X86TargetLowering::getJumpTableEncoding() const { |
| 2614 | // In GOT pic mode, each entry in the jump table is emitted as a @GOTOFF |
| 2615 | // symbol. |
| 2616 | if (isPositionIndependent() && Subtarget.isPICStyleGOT()) |
| 2617 | return MachineJumpTableInfo::EK_Custom32; |
| 2618 | |
| 2619 | // Otherwise, use the normal jump table encoding heuristics. |
| 2620 | return TargetLowering::getJumpTableEncoding(); |
| 2621 | } |
| 2622 | |
| 2623 | bool X86TargetLowering::useSoftFloat() const { |
| 2624 | return Subtarget.useSoftFloat(); |
| 2625 | } |
| 2626 | |
| 2627 | void X86TargetLowering::markLibCallAttributes(MachineFunction *MF, unsigned CC, |
| 2628 | ArgListTy &Args) const { |
| 2629 | |
| 2630 | // Only relabel X86-32 for C / Stdcall CCs. |
| 2631 | if (Subtarget.is64Bit()) |
| 2632 | return; |
| 2633 | if (CC != CallingConv::C && CC != CallingConv::X86_StdCall) |
| 2634 | return; |
| 2635 | unsigned ParamRegs = 0; |
| 2636 | if (auto *M = MF->getFunction().getParent()) |
| 2637 | ParamRegs = M->getNumberRegisterParameters(); |
| 2638 | |
| 2639 | // Mark the first N int arguments as having reg |
| 2640 | for (auto &Arg : Args) { |
| 2641 | Type *T = Arg.Ty; |
| 2642 | if (T->isIntOrPtrTy()) |
| 2643 | if (MF->getDataLayout().getTypeAllocSize(T) <= 8) { |
| 2644 | unsigned numRegs = 1; |
| 2645 | if (MF->getDataLayout().getTypeAllocSize(T) > 4) |
| 2646 | numRegs = 2; |
| 2647 | if (ParamRegs < numRegs) |
| 2648 | return; |
| 2649 | ParamRegs -= numRegs; |
| 2650 | Arg.IsInReg = true; |
| 2651 | } |
| 2652 | } |
| 2653 | } |
| 2654 | |
| 2655 | const MCExpr * |
| 2656 | X86TargetLowering::LowerCustomJumpTableEntry(const MachineJumpTableInfo *MJTI, |
| 2657 | const MachineBasicBlock *MBB, |
| 2658 | unsigned uid,MCContext &Ctx) const{ |
| 2659 | assert(isPositionIndependent() && Subtarget.isPICStyleGOT())(static_cast <bool> (isPositionIndependent() && Subtarget.isPICStyleGOT()) ? void (0) : __assert_fail ("isPositionIndependent() && Subtarget.isPICStyleGOT()" , "llvm/lib/Target/X86/X86ISelLowering.cpp", 2659, __extension__ __PRETTY_FUNCTION__)); |
| 2660 | // In 32-bit ELF systems, our jump table entries are formed with @GOTOFF |
| 2661 | // entries. |
| 2662 | return MCSymbolRefExpr::create(MBB->getSymbol(), |
| 2663 | MCSymbolRefExpr::VK_GOTOFF, Ctx); |
| 2664 | } |
| 2665 | |
| 2666 | /// Returns relocation base for the given PIC jumptable. |
| 2667 | SDValue X86TargetLowering::getPICJumpTableRelocBase(SDValue Table, |
| 2668 | SelectionDAG &DAG) const { |
| 2669 | if (!Subtarget.is64Bit()) |
| 2670 | // This doesn't have SDLoc associated with it, but is not really the |
| 2671 | // same as a Register. |
| 2672 | return DAG.getNode(X86ISD::GlobalBaseReg, SDLoc(), |
| 2673 | getPointerTy(DAG.getDataLayout())); |
| 2674 | return Table; |
| 2675 | } |
| 2676 | |
| 2677 | /// This returns the relocation base for the given PIC jumptable, |
| 2678 | /// the same as getPICJumpTableRelocBase, but as an MCExpr. |
| 2679 | const MCExpr *X86TargetLowering:: |
| 2680 | getPICJumpTableRelocBaseExpr(const MachineFunction *MF, unsigned JTI, |
| 2681 | MCContext &Ctx) const { |
| 2682 | // X86-64 uses RIP relative addressing based on the jump table label. |
| 2683 | if (Subtarget.isPICStyleRIPRel()) |
| 2684 | return TargetLowering::getPICJumpTableRelocBaseExpr(MF, JTI, Ctx); |
| 2685 | |
| 2686 | // Otherwise, the reference is relative to the PIC base. |
| 2687 | return MCSymbolRefExpr::create(MF->getPICBaseSymbol(), Ctx); |
| 2688 | } |
| 2689 | |
| 2690 | std::pair<const TargetRegisterClass *, uint8_t> |
| 2691 | X86TargetLowering::findRepresentativeClass(const TargetRegisterInfo *TRI, |
| 2692 | MVT VT) const { |
| 2693 | const TargetRegisterClass *RRC = nullptr; |
| 2694 | uint8_t Cost = 1; |
| 2695 | switch (VT.SimpleTy) { |
| 2696 | default: |
| 2697 | return TargetLowering::findRepresentativeClass(TRI, VT); |
| 2698 | case MVT::i8: case MVT::i16: case MVT::i32: case MVT::i64: |
| 2699 | RRC = Subtarget.is64Bit() ? &X86::GR64RegClass : &X86::GR32RegClass; |
| 2700 | break; |
| 2701 | case MVT::x86mmx: |
| 2702 | RRC = &X86::VR64RegClass; |
| 2703 | break; |
| 2704 | case MVT::f32: case MVT::f64: |
| 2705 | case MVT::v16i8: case MVT::v8i16: case MVT::v4i32: case MVT::v2i64: |
| 2706 | case MVT::v4f32: case MVT::v2f64: |
| 2707 | case MVT::v32i8: case MVT::v16i16: case MVT::v8i32: case MVT::v4i64: |
| 2708 | case MVT::v8f32: case MVT::v4f64: |
| 2709 | case MVT::v64i8: case MVT::v32i16: case MVT::v16i32: case MVT::v8i64: |
| 2710 | case MVT::v16f32: case MVT::v8f64: |
| 2711 | RRC = &X86::VR128XRegClass; |
| 2712 | break; |
| 2713 | } |
| 2714 | return std::make_pair(RRC, Cost); |
| 2715 | } |
| 2716 | |
| 2717 | unsigned X86TargetLowering::getAddressSpace() const { |
| 2718 | if (Subtarget.is64Bit()) |
| 2719 | return (getTargetMachine().getCodeModel() == CodeModel::Kernel) ? 256 : 257; |
| 2720 | return 256; |
| 2721 | } |
| 2722 | |
| 2723 | static bool hasStackGuardSlotTLS(const Triple &TargetTriple) { |
| 2724 | return TargetTriple.isOSGlibc() || TargetTriple.isOSFuchsia() || |
| 2725 | (TargetTriple.isAndroid() && !TargetTriple.isAndroidVersionLT(17)); |
| 2726 | } |
| 2727 | |
| 2728 | static Constant* SegmentOffset(IRBuilderBase &IRB, |
| 2729 | int Offset, unsigned AddressSpace) { |
| 2730 | return ConstantExpr::getIntToPtr( |
| 2731 | ConstantInt::get(Type::getInt32Ty(IRB.getContext()), Offset), |
| 2732 | Type::getInt8PtrTy(IRB.getContext())->getPointerTo(AddressSpace)); |
| 2733 | } |
| 2734 | |
| 2735 | Value *X86TargetLowering::getIRStackGuard(IRBuilderBase &IRB) const { |
| 2736 | // glibc, bionic, and Fuchsia have a special slot for the stack guard in |
| 2737 | // tcbhead_t; use it instead of the usual global variable (see |
| 2738 | // sysdeps/{i386,x86_64}/nptl/tls.h) |
| 2739 | if (hasStackGuardSlotTLS(Subtarget.getTargetTriple())) { |
| 2740 | if (Subtarget.isTargetFuchsia()) { |
| 2741 | // <zircon/tls.h> defines ZX_TLS_STACK_GUARD_OFFSET with this value. |
| 2742 | return SegmentOffset(IRB, 0x10, getAddressSpace()); |
| 2743 | } else { |
| 2744 | unsigned AddressSpace = getAddressSpace(); |
| 2745 | Module *M = IRB.GetInsertBlock()->getParent()->getParent(); |
| 2746 | // Specially, some users may customize the base reg and offset. |
| 2747 | int Offset = M->getStackProtectorGuardOffset(); |
| 2748 | // If we don't set -stack-protector-guard-offset value: |
| 2749 | // %fs:0x28, unless we're using a Kernel code model, in which case |
| 2750 | // it's %gs:0x28. gs:0x14 on i386. |
| 2751 | if (Offset == INT_MAX2147483647) |
| 2752 | Offset = (Subtarget.is64Bit()) ? 0x28 : 0x14; |
| 2753 | |
| 2754 | StringRef GuardReg = M->getStackProtectorGuardReg(); |
| 2755 | if (GuardReg == "fs") |
| 2756 | AddressSpace = X86AS::FS; |
| 2757 | else if (GuardReg == "gs") |
| 2758 | AddressSpace = X86AS::GS; |
| 2759 | return SegmentOffset(IRB, Offset, AddressSpace); |
| 2760 | } |
| 2761 | } |
| 2762 | return TargetLowering::getIRStackGuard(IRB); |
| 2763 | } |
| 2764 | |
| 2765 | void X86TargetLowering::insertSSPDeclarations(Module &M) const { |
| 2766 | // MSVC CRT provides functionalities for stack protection. |
| 2767 | if (Subtarget.getTargetTriple().isWindowsMSVCEnvironment() || |
| 2768 | Subtarget.getTargetTriple().isWindowsItaniumEnvironment()) { |
| 2769 | // MSVC CRT has a global variable holding security cookie. |
| 2770 | M.getOrInsertGlobal("__security_cookie", |
| 2771 | Type::getInt8PtrTy(M.getContext())); |
| 2772 | |
| 2773 | // MSVC CRT has a function to validate security cookie. |
| 2774 | FunctionCallee SecurityCheckCookie = M.getOrInsertFunction( |
| 2775 | "__security_check_cookie", Type::getVoidTy(M.getContext()), |
| 2776 | Type::getInt8PtrTy(M.getContext())); |
| 2777 | if (Function *F = dyn_cast<Function>(SecurityCheckCookie.getCallee())) { |
| 2778 | F->setCallingConv(CallingConv::X86_FastCall); |
| 2779 | F->addParamAttr(0, Attribute::AttrKind::InReg); |
| 2780 | } |
| 2781 | return; |
| 2782 | } |
| 2783 | |
| 2784 | StringRef GuardMode = M.getStackProtectorGuard(); |
| 2785 | |
| 2786 | // glibc, bionic, and Fuchsia have a special slot for the stack guard. |
| 2787 | if ((GuardMode == "tls" || GuardMode.empty()) && |
| 2788 | hasStackGuardSlotTLS(Subtarget.getTargetTriple())) |
| 2789 | return; |
| 2790 | TargetLowering::insertSSPDeclarations(M); |
| 2791 | } |
| 2792 | |
| 2793 | Value *X86TargetLowering::getSDagStackGuard(const Module &M) const { |
| 2794 | // MSVC CRT has a global variable holding security cookie. |
| 2795 | if (Subtarget.getTargetTriple().isWindowsMSVCEnvironment() || |
| 2796 | Subtarget.getTargetTriple().isWindowsItaniumEnvironment()) { |
| 2797 | return M.getGlobalVariable("__security_cookie"); |
| 2798 | } |
| 2799 | return TargetLowering::getSDagStackGuard(M); |
| 2800 | } |
| 2801 | |
| 2802 | Function *X86TargetLowering::getSSPStackGuardCheck(const Module &M) const { |
| 2803 | // MSVC CRT has a function to validate security cookie. |
| 2804 | if (Subtarget.getTargetTriple().isWindowsMSVCEnvironment() || |
| 2805 | Subtarget.getTargetTriple().isWindowsItaniumEnvironment()) { |
| 2806 | return M.getFunction("__security_check_cookie"); |
| 2807 | } |
| 2808 | return TargetLowering::getSSPStackGuardCheck(M); |
| 2809 | } |
| 2810 | |
| 2811 | Value * |
| 2812 | X86TargetLowering::getSafeStackPointerLocation(IRBuilderBase &IRB) const { |
| 2813 | if (Subtarget.getTargetTriple().isOSContiki()) |
| 2814 | return getDefaultSafeStackPointerLocation(IRB, false); |
| 2815 | |
| 2816 | // Android provides a fixed TLS slot for the SafeStack pointer. See the |
| 2817 | // definition of TLS_SLOT_SAFESTACK in |
| 2818 | // https://android.googlesource.com/platform/bionic/+/master/libc/private/bionic_tls.h |
| 2819 | if (Subtarget.isTargetAndroid()) { |
| 2820 | // %fs:0x48, unless we're using a Kernel code model, in which case it's %gs: |
| 2821 | // %gs:0x24 on i386 |
| 2822 | int Offset = (Subtarget.is64Bit()) ? 0x48 : 0x24; |
| 2823 | return SegmentOffset(IRB, Offset, getAddressSpace()); |
| 2824 | } |
| 2825 | |
| 2826 | // Fuchsia is similar. |
| 2827 | if (Subtarget.isTargetFuchsia()) { |
| 2828 | // <zircon/tls.h> defines ZX_TLS_UNSAFE_SP_OFFSET with this value. |
| 2829 | return SegmentOffset(IRB, 0x18, getAddressSpace()); |
| 2830 | } |
| 2831 | |
| 2832 | return TargetLowering::getSafeStackPointerLocation(IRB); |
| 2833 | } |
| 2834 | |
| 2835 | //===----------------------------------------------------------------------===// |
| 2836 | // Return Value Calling Convention Implementation |
| 2837 | //===----------------------------------------------------------------------===// |
| 2838 | |
| 2839 | bool X86TargetLowering::CanLowerReturn( |
| 2840 | CallingConv::ID CallConv, MachineFunction &MF, bool isVarArg, |
| 2841 | const SmallVectorImpl<ISD::OutputArg> &Outs, LLVMContext &Context) const { |
| 2842 | SmallVector<CCValAssign, 16> RVLocs; |
| 2843 | CCState CCInfo(CallConv, isVarArg, MF, RVLocs, Context); |
| 2844 | return CCInfo.CheckReturn(Outs, RetCC_X86); |
| 2845 | } |
| 2846 | |
| 2847 | const MCPhysReg *X86TargetLowering::getScratchRegisters(CallingConv::ID) const { |
| 2848 | static const MCPhysReg ScratchRegs[] = { X86::R11, 0 }; |
| 2849 | return ScratchRegs; |
| 2850 | } |
| 2851 | |
| 2852 | /// Lowers masks values (v*i1) to the local register values |
| 2853 | /// \returns DAG node after lowering to register type |
| 2854 | static SDValue lowerMasksToReg(const SDValue &ValArg, const EVT &ValLoc, |
| 2855 | const SDLoc &Dl, SelectionDAG &DAG) { |
| 2856 | EVT ValVT = ValArg.getValueType(); |
| 2857 | |
| 2858 | if (ValVT == MVT::v1i1) |
| 2859 | return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, Dl, ValLoc, ValArg, |
| 2860 | DAG.getIntPtrConstant(0, Dl)); |
| 2861 | |
| 2862 | if ((ValVT == MVT::v8i1 && (ValLoc == MVT::i8 || ValLoc == MVT::i32)) || |
| 2863 | (ValVT == MVT::v16i1 && (ValLoc == MVT::i16 || ValLoc == MVT::i32))) { |
| 2864 | // Two stage lowering might be required |
| 2865 | // bitcast: v8i1 -> i8 / v16i1 -> i16 |
| 2866 | // anyextend: i8 -> i32 / i16 -> i32 |
| 2867 | EVT TempValLoc = ValVT == MVT::v8i1 ? MVT::i8 : MVT::i16; |
| 2868 | SDValue ValToCopy = DAG.getBitcast(TempValLoc, ValArg); |
| 2869 | if (ValLoc == MVT::i32) |
| 2870 | ValToCopy = DAG.getNode(ISD::ANY_EXTEND, Dl, ValLoc, ValToCopy); |
| 2871 | return ValToCopy; |
| 2872 | } |
| 2873 | |
| 2874 | if ((ValVT == MVT::v32i1 && ValLoc == MVT::i32) || |
| 2875 | (ValVT == MVT::v64i1 && ValLoc == MVT::i64)) { |
| 2876 | // One stage lowering is required |
| 2877 | // bitcast: v32i1 -> i32 / v64i1 -> i64 |
| 2878 | return DAG.getBitcast(ValLoc, ValArg); |
| 2879 | } |
| 2880 | |
| 2881 | return DAG.getNode(ISD::ANY_EXTEND, Dl, ValLoc, ValArg); |
| 2882 | } |
| 2883 | |
| 2884 | /// Breaks v64i1 value into two registers and adds the new node to the DAG |
| 2885 | static void Passv64i1ArgInRegs( |
| 2886 | const SDLoc &Dl, SelectionDAG &DAG, SDValue &Arg, |
| 2887 | SmallVectorImpl<std::pair<Register, SDValue>> &RegsToPass, CCValAssign &VA, |
| 2888 | CCValAssign &NextVA, const X86Subtarget &Subtarget) { |
| 2889 | assert(Subtarget.hasBWI() && "Expected AVX512BW target!")(static_cast <bool> (Subtarget.hasBWI() && "Expected AVX512BW target!" ) ? void (0) : __assert_fail ("Subtarget.hasBWI() && \"Expected AVX512BW target!\"" , "llvm/lib/Target/X86/X86ISelLowering.cpp", 2889, __extension__ __PRETTY_FUNCTION__)); |
| 2890 | assert(Subtarget.is32Bit() && "Expecting 32 bit target")(static_cast <bool> (Subtarget.is32Bit() && "Expecting 32 bit target" ) ? void (0) : __assert_fail ("Subtarget.is32Bit() && \"Expecting 32 bit target\"" , "llvm/lib/Target/X86/X86ISelLowering.cpp", 2890, __extension__ __PRETTY_FUNCTION__)); |
| 2891 | assert(Arg.getValueType() == MVT::i64 && "Expecting 64 bit value")(static_cast <bool> (Arg.getValueType() == MVT::i64 && "Expecting 64 bit value") ? void (0) : __assert_fail ("Arg.getValueType() == MVT::i64 && \"Expecting 64 bit value\"" , "llvm/lib/Target/X86/X86ISelLowering.cpp", 2891, __extension__ __PRETTY_FUNCTION__)); |
| 2892 | assert(VA.isRegLoc() && NextVA.isRegLoc() &&(static_cast <bool> (VA.isRegLoc() && NextVA.isRegLoc () && "The value should reside in two registers") ? void (0) : __assert_fail ("VA.isRegLoc() && NextVA.isRegLoc() && \"The value should reside in two registers\"" , "llvm/lib/Target/X86/X86ISelLowering.cpp", 2893, __extension__ __PRETTY_FUNCTION__)) |
| 2893 | "The value should reside in two registers")(static_cast <bool> (VA.isRegLoc() && NextVA.isRegLoc () && "The value should reside in two registers") ? void (0) : __assert_fail ("VA.isRegLoc() && NextVA.isRegLoc() && \"The value should reside in two registers\"" , "llvm/lib/Target/X86/X86ISelLowering.cpp", 2893, __extension__ __PRETTY_FUNCTION__)); |
| 2894 | |
| 2895 | // Before splitting the value we cast it to i64 |
| 2896 | Arg = DAG.getBitcast(MVT::i64, Arg); |
| 2897 | |
| 2898 | // Splitting the value into two i32 types |
| 2899 | SDValue Lo, Hi; |
| 2900 | Lo = DAG.getNode(ISD::EXTRACT_ELEMENT, Dl, MVT::i32, Arg, |
| 2901 | DAG.getConstant(0, Dl, MVT::i32)); |
| 2902 | Hi = DAG.getNode(ISD::EXTRACT_ELEMENT, Dl, MVT::i32, Arg, |
| 2903 | DAG.getConstant(1, Dl, MVT::i32)); |
| 2904 | |
| 2905 | // Attach the two i32 types into corresponding registers |
| 2906 | RegsToPass.push_back(std::make_pair(VA.getLocReg(), Lo)); |
| 2907 | RegsToPass.push_back(std::make_pair(NextVA.getLocReg(), Hi)); |
| 2908 | } |
| 2909 | |
| 2910 | SDValue |
| 2911 | X86TargetLowering::LowerReturn(SDValue Chain, CallingConv::ID CallConv, |
| 2912 | bool isVarArg, |
| 2913 | const SmallVectorImpl<ISD::OutputArg> &Outs, |
| 2914 | const SmallVectorImpl<SDValue> &OutVals, |
| 2915 | const SDLoc &dl, SelectionDAG &DAG) const { |
| 2916 | MachineFunction &MF = DAG.getMachineFunction(); |
| 2917 | X86MachineFunctionInfo *FuncInfo = MF.getInfo<X86MachineFunctionInfo>(); |
| 2918 | |
| 2919 | // In some cases we need to disable registers from the default CSR list. |
| 2920 | // For example, when they are used for argument passing. |
| 2921 | bool ShouldDisableCalleeSavedRegister = |
| 2922 | CallConv == CallingConv::X86_RegCall || |
| 2923 | MF.getFunction().hasFnAttribute("no_caller_saved_registers"); |
| 2924 | |
| 2925 | if (CallConv == CallingConv::X86_INTR && !Outs.empty()) |
| 2926 | report_fatal_error("X86 interrupts may not return any value"); |
| 2927 | |
| 2928 | SmallVector<CCValAssign, 16> RVLocs; |
| 2929 | CCState CCInfo(CallConv, isVarArg, MF, RVLocs, *DAG.getContext()); |
| 2930 | CCInfo.AnalyzeReturn(Outs, RetCC_X86); |
| 2931 | |
| 2932 | SmallVector<std::pair<Register, SDValue>, 4> RetVals; |
| 2933 | for (unsigned I = 0, OutsIndex = 0, E = RVLocs.size(); I != E; |
| 2934 | ++I, ++OutsIndex) { |
| 2935 | CCValAssign &VA = RVLocs[I]; |
| 2936 | assert(VA.isRegLoc() && "Can only return in registers!")(static_cast <bool> (VA.isRegLoc() && "Can only return in registers!" ) ? void (0) : __assert_fail ("VA.isRegLoc() && \"Can only return in registers!\"" , "llvm/lib/Target/X86/X86ISelLowering.cpp", 2936, __extension__ __PRETTY_FUNCTION__)); |
| 2937 | |
| 2938 | // Add the register to the CalleeSaveDisableRegs list. |
| 2939 | if (ShouldDisableCalleeSavedRegister) |
| 2940 | MF.getRegInfo().disableCalleeSavedRegister(VA.getLocReg()); |
| 2941 | |
| 2942 | SDValue ValToCopy = OutVals[OutsIndex]; |
| 2943 | EVT ValVT = ValToCopy.getValueType(); |
| 2944 | |
| 2945 | // Promote values to the appropriate types. |
| 2946 | if (VA.getLocInfo() == CCValAssign::SExt) |
| 2947 | ValToCopy = DAG.getNode(ISD::SIGN_EXTEND, dl, VA.getLocVT(), ValToCopy); |
| 2948 | else if (VA.getLocInfo() == CCValAssign::ZExt) |
| 2949 | ValToCopy = DAG.getNode(ISD::ZERO_EXTEND, dl, VA.getLocVT(), ValToCopy); |
| 2950 | else if (VA.getLocInfo() == CCValAssign::AExt) { |
| 2951 | if (ValVT.isVector() && ValVT.getVectorElementType() == MVT::i1) |
| 2952 | ValToCopy = lowerMasksToReg(ValToCopy, VA.getLocVT(), dl, DAG); |
| 2953 | else |
| 2954 | ValToCopy = DAG.getNode(ISD::ANY_EXTEND, dl, VA.getLocVT(), ValToCopy); |
| 2955 | } |
| 2956 | else if (VA.getLocInfo() == CCValAssign::BCvt) |
| 2957 | ValToCopy = DAG.getBitcast(VA.getLocVT(), ValToCopy); |
| 2958 | |
| 2959 | assert(VA.getLocInfo() != CCValAssign::FPExt &&(static_cast <bool> (VA.getLocInfo() != CCValAssign::FPExt && "Unexpected FP-extend for return value.") ? void ( 0) : __assert_fail ("VA.getLocInfo() != CCValAssign::FPExt && \"Unexpected FP-extend for return value.\"" , "llvm/lib/Target/X86/X86ISelLowering.cpp", 2960, __extension__ __PRETTY_FUNCTION__)) |
| 2960 | "Unexpected FP-extend for return value.")(static_cast <bool> (VA.getLocInfo() != CCValAssign::FPExt && "Unexpected FP-extend for return value.") ? void ( 0) : __assert_fail ("VA.getLocInfo() != CCValAssign::FPExt && \"Unexpected FP-extend for return value.\"" , "llvm/lib/Target/X86/X86ISelLowering.cpp", 2960, __extension__ __PRETTY_FUNCTION__)); |
| 2961 | |
| 2962 | // Report an error if we have attempted to return a value via an XMM |
| 2963 | // register and SSE was disabled. |
| 2964 | if (!Subtarget.hasSSE1() && X86::FR32XRegClass.contains(VA.getLocReg())) { |
| 2965 | errorUnsupported(DAG, dl, "SSE register return with SSE disabled"); |
| 2966 | VA.convertToReg(X86::FP0); // Set reg to FP0, avoid hitting asserts. |
| 2967 | } else if (!Subtarget.hasSSE2() && |
| 2968 | X86::FR64XRegClass.contains(VA.getLocReg()) && |
| 2969 | ValVT == MVT::f64) { |
| 2970 | // When returning a double via an XMM register, report an error if SSE2 is |
| 2971 | // not enabled. |
| 2972 | errorUnsupported(DAG, dl, "SSE2 register return with SSE2 disabled"); |
| 2973 | VA.convertToReg(X86::FP0); // Set reg to FP0, avoid hitting asserts. |
| 2974 | } |
| 2975 | |
| 2976 | // Returns in ST0/ST1 are handled specially: these are pushed as operands to |
| 2977 | // the RET instruction and handled by the FP Stackifier. |
| 2978 | if (VA.getLocReg() == X86::FP0 || |
| 2979 | VA.getLocReg() == X86::FP1) { |
| 2980 | // If this is a copy from an xmm register to ST(0), use an FPExtend to |
| 2981 | // change the value to the FP stack register class. |
| 2982 | if (isScalarFPTypeInSSEReg(VA.getValVT())) |
| 2983 | ValToCopy = DAG.getNode(ISD::FP_EXTEND, dl, MVT::f80, ValToCopy); |
| 2984 | RetVals.push_back(std::make_pair(VA.getLocReg(), ValToCopy)); |
| 2985 | // Don't emit a copytoreg. |
| 2986 | continue; |
| 2987 | } |
| 2988 | |
| 2989 | // 64-bit vector (MMX) values are returned in XMM0 / XMM1 except for v1i64 |
| 2990 | // which is returned in RAX / RDX. |
| 2991 | if (Subtarget.is64Bit()) { |
| 2992 | if (ValVT == MVT::x86mmx) { |
| 2993 | if (VA.getLocReg() == X86::XMM0 || VA.getLocReg() == X86::XMM1) { |
| 2994 | ValToCopy = DAG.getBitcast(MVT::i64, ValToCopy); |
| 2995 | ValToCopy = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v2i64, |
| 2996 | ValToCopy); |
| 2997 | // If we don't have SSE2 available, convert to v4f32 so the generated |
| 2998 | // register is legal. |
| 2999 | if (!Subtarget.hasSSE2()) |
| 3000 | ValToCopy = DAG.getBitcast(MVT::v4f32, ValToCopy); |
| 3001 | } |
| 3002 | } |
| 3003 | } |
| 3004 | |
| 3005 | if (VA.needsCustom()) { |
| 3006 | assert(VA.getValVT() == MVT::v64i1 &&(static_cast <bool> (VA.getValVT() == MVT::v64i1 && "Currently the only custom case is when we split v64i1 to 2 regs" ) ? void (0) : __assert_fail ("VA.getValVT() == MVT::v64i1 && \"Currently the only custom case is when we split v64i1 to 2 regs\"" , "llvm/lib/Target/X86/X86ISelLowering.cpp", 3007, __extension__ __PRETTY_FUNCTION__)) |
| 3007 | "Currently the only custom case is when we split v64i1 to 2 regs")(static_cast <bool> (VA.getValVT() == MVT::v64i1 && "Currently the only custom case is when we split v64i1 to 2 regs" ) ? void (0) : __assert_fail ("VA.getValVT() == MVT::v64i1 && \"Currently the only custom case is when we split v64i1 to 2 regs\"" , "llvm/lib/Target/X86/X86ISelLowering.cpp", 3007, __extension__ __PRETTY_FUNCTION__)); |
| 3008 | |
| 3009 | Passv64i1ArgInRegs(dl, DAG, ValToCopy, RetVals, VA, RVLocs[++I], |
| 3010 | Subtarget); |
| 3011 | |
| 3012 | // Add the second register to the CalleeSaveDisableRegs list. |
| 3013 | if (ShouldDisableCalleeSavedRegister) |
| 3014 | MF.getRegInfo().disableCalleeSavedRegister(RVLocs[I].getLocReg()); |
| 3015 | } else { |
| 3016 | RetVals.push_back(std::make_pair(VA.getLocReg(), ValToCopy)); |
| 3017 | } |
| 3018 | } |
| 3019 | |
| 3020 | SDValue Flag; |
| 3021 | SmallVector<SDValue, 6> RetOps; |
| 3022 | RetOps.push_back(Chain); // Operand #0 = Chain (updated below) |
| 3023 | // Operand #1 = Bytes To Pop |
| 3024 | RetOps.push_back(DAG.getTargetConstant(FuncInfo->getBytesToPopOnReturn(), dl, |
| 3025 | MVT::i32)); |
| 3026 | |
| 3027 | // Copy the result values into the output registers. |
| 3028 | for (auto &RetVal : RetVals) { |
| 3029 | if (RetVal.first == X86::FP0 || RetVal.first == X86::FP1) { |
| 3030 | RetOps.push_back(RetVal.second); |
| 3031 | continue; // Don't emit a copytoreg. |
| 3032 | } |
| 3033 | |
| 3034 | Chain = DAG.getCopyToReg(Chain, dl, RetVal.first, RetVal.second, Flag); |
| 3035 | Flag = Chain.getValue(1); |
| 3036 | RetOps.push_back( |
| 3037 | DAG.getRegister(RetVal.first, RetVal.second.getValueType())); |
| 3038 | } |
| 3039 | |
| 3040 | // Swift calling convention does not require we copy the sret argument |
| 3041 | // into %rax/%eax for the return, and SRetReturnReg is not set for Swift. |
| 3042 | |
| 3043 | // All x86 ABIs require that for returning structs by value we copy |
| 3044 | // the sret argument into %rax/%eax (depending on ABI) for the return. |
| 3045 | // We saved the argument into a virtual register in the entry block, |
| 3046 | // so now we copy the value out and into %rax/%eax. |
| 3047 | // |
| 3048 | // Checking Function.hasStructRetAttr() here is insufficient because the IR |
| 3049 | // may not have an explicit sret argument. If FuncInfo.CanLowerReturn is |
| 3050 | // false, then an sret argument may be implicitly inserted in the SelDAG. In |
| 3051 | // either case FuncInfo->setSRetReturnReg() will have been called. |
| 3052 | if (Register SRetReg = FuncInfo->getSRetReturnReg()) { |
| 3053 | // When we have both sret and another return value, we should use the |
| 3054 | // original Chain stored in RetOps[0], instead of the current Chain updated |
| 3055 | // in the above loop. If we only have sret, RetOps[0] equals to Chain. |
| 3056 | |
| 3057 | // For the case of sret and another return value, we have |
| 3058 | // Chain_0 at the function entry |
| 3059 | // Chain_1 = getCopyToReg(Chain_0) in the above loop |
| 3060 | // If we use Chain_1 in getCopyFromReg, we will have |
| 3061 | // Val = getCopyFromReg(Chain_1) |
| 3062 | // Chain_2 = getCopyToReg(Chain_1, Val) from below |
| 3063 | |
| 3064 | // getCopyToReg(Chain_0) will be glued together with |
| 3065 | // getCopyToReg(Chain_1, Val) into Unit A, getCopyFromReg(Chain_1) will be |
| 3066 | // in Unit B, and we will have cyclic dependency between Unit A and Unit B: |
| 3067 | // Data dependency from Unit B to Unit A due to usage of Val in |
| 3068 | // getCopyToReg(Chain_1, Val) |
| 3069 | // Chain dependency from Unit A to Unit B |
| 3070 | |
| 3071 | // So here, we use RetOps[0] (i.e Chain_0) for getCopyFromReg. |
| 3072 | SDValue Val = DAG.getCopyFromReg(RetOps[0], dl, SRetReg, |
| 3073 | getPointerTy(MF.getDataLayout())); |
| 3074 | |
| 3075 | Register RetValReg |
| 3076 | = (Subtarget.is64Bit() && !Subtarget.isTarget64BitILP32()) ? |
| 3077 | X86::RAX : X86::EAX; |
| 3078 | Chain = DAG.getCopyToReg(Chain, dl, RetValReg, Val, Flag); |
| 3079 | Flag = Chain.getValue(1); |
| 3080 | |
| 3081 | // RAX/EAX now acts like a return value. |
| 3082 | RetOps.push_back( |
| 3083 | DAG.getRegister(RetValReg, getPointerTy(DAG.getDataLayout()))); |
| 3084 | |
| 3085 | // Add the returned register to the CalleeSaveDisableRegs list. |
| 3086 | if (ShouldDisableCalleeSavedRegister) |
| 3087 | MF.getRegInfo().disableCalleeSavedRegister(RetValReg); |
| 3088 | } |
| 3089 | |
| 3090 | const X86RegisterInfo *TRI = Subtarget.getRegisterInfo(); |
| 3091 | const MCPhysReg *I = |
| 3092 | TRI->getCalleeSavedRegsViaCopy(&DAG.getMachineFunction()); |
| 3093 | if (I) { |
| 3094 | for (; *I; ++I) { |
| 3095 | if (X86::GR64RegClass.contains(*I)) |
| 3096 | RetOps.push_back(DAG.getRegister(*I, MVT::i64)); |
| 3097 | else |
| 3098 | llvm_unreachable("Unexpected register class in CSRsViaCopy!")::llvm::llvm_unreachable_internal("Unexpected register class in CSRsViaCopy!" , "llvm/lib/Target/X86/X86ISelLowering.cpp", 3098); |
| 3099 | } |
| 3100 | } |
| 3101 | |
| 3102 | RetOps[0] = Chain; // Update chain. |
| 3103 | |
| 3104 | // Add the flag if we have it. |
| 3105 | if (Flag.getNode()) |
| 3106 | RetOps.push_back(Flag); |
| 3107 | |
| 3108 | X86ISD::NodeType opcode = X86ISD::RET_FLAG; |
| 3109 | if (CallConv == CallingConv::X86_INTR) |
| 3110 | opcode = X86ISD::IRET; |
| 3111 | return DAG.getNode(opcode, dl, MVT::Other, RetOps); |
| 3112 | } |
| 3113 | |
| 3114 | bool X86TargetLowering::isUsedByReturnOnly(SDNode *N, SDValue &Chain) const { |
| 3115 | if (N->getNumValues() != 1 || !N->hasNUsesOfValue(1, 0)) |
| 3116 | return false; |
| 3117 | |
| 3118 | SDValue TCChain = Chain; |
| 3119 | SDNode *Copy = *N->use_begin(); |
| 3120 | if (Copy->getOpcode() == ISD::CopyToReg) { |
| 3121 | // If the copy has a glue operand, we conservatively assume it isn't safe to |
| 3122 | // perform a tail call. |
| 3123 | if (Copy->getOperand(Copy->getNumOperands()-1).getValueType() == MVT::Glue) |
| 3124 | return false; |
| 3125 | TCChain = Copy->getOperand(0); |
| 3126 | } else if (Copy->getOpcode() != ISD::FP_EXTEND) |
| 3127 | return false; |
| 3128 | |
| 3129 | bool HasRet = false; |
| 3130 | for (const SDNode *U : Copy->uses()) { |
| 3131 | if (U->getOpcode() != X86ISD::RET_FLAG) |
| 3132 | return false; |
| 3133 | // If we are returning more than one value, we can definitely |
| 3134 | // not make a tail call see PR19530 |
| 3135 | if (U->getNumOperands() > 4) |
| 3136 | return false; |
| 3137 | if (U->getNumOperands() == 4 && |
| 3138 | U->getOperand(U->getNumOperands() - 1).getValueType() != MVT::Glue) |
| 3139 | return false; |
| 3140 | HasRet = true; |
| 3141 | } |
| 3142 | |
| 3143 | if (!HasRet) |
| 3144 | return false; |
| 3145 | |
| 3146 | Chain = TCChain; |
| 3147 | return true; |
| 3148 | } |
| 3149 | |
| 3150 | EVT X86TargetLowering::getTypeForExtReturn(LLVMContext &Context, EVT VT, |
| 3151 | ISD::NodeType ExtendKind) const { |
| 3152 | MVT ReturnMVT = MVT::i32; |
| 3153 | |
| 3154 | bool Darwin = Subtarget.getTargetTriple().isOSDarwin(); |
| 3155 | if (VT == MVT::i1 || (!Darwin && (VT == MVT::i8 || VT == MVT::i16))) { |
| 3156 | // The ABI does not require i1, i8 or i16 to be extended. |
| 3157 | // |
| 3158 | // On Darwin, there is code in the wild relying on Clang's old behaviour of |
| 3159 | // always extending i8/i16 return values, so keep doing that for now. |
| 3160 | // (PR26665). |
| 3161 | ReturnMVT = MVT::i8; |
| 3162 | } |
| 3163 | |
| 3164 | EVT MinVT = getRegisterType(Context, ReturnMVT); |
| 3165 | return VT.bitsLT(MinVT) ? MinVT : VT; |
| 3166 | } |
| 3167 | |
| 3168 | /// Reads two 32 bit registers and creates a 64 bit mask value. |
| 3169 | /// \param VA The current 32 bit value that need to be assigned. |
| 3170 | /// \param NextVA The next 32 bit value that need to be assigned. |
| 3171 | /// \param Root The parent DAG node. |
| 3172 | /// \param [in,out] InFlag Represents SDvalue in the parent DAG node for |
| 3173 | /// glue purposes. In the case the DAG is already using |
| 3174 | /// physical register instead of virtual, we should glue |
| 3175 | /// our new SDValue to InFlag SDvalue. |
| 3176 | /// \return a new SDvalue of size 64bit. |
| 3177 | static SDValue getv64i1Argument(CCValAssign &VA, CCValAssign &NextVA, |
| 3178 | SDValue &Root, SelectionDAG &DAG, |
| 3179 | const SDLoc &Dl, const X86Subtarget &Subtarget, |
| 3180 | SDValue *InFlag = nullptr) { |
| 3181 | assert((Subtarget.hasBWI()) && "Expected AVX512BW target!")(static_cast <bool> ((Subtarget.hasBWI()) && "Expected AVX512BW target!" ) ? void (0) : __assert_fail ("(Subtarget.hasBWI()) && \"Expected AVX512BW target!\"" , "llvm/lib/Target/X86/X86ISelLowering.cpp", 3181, __extension__ __PRETTY_FUNCTION__)); |
| 3182 | assert(Subtarget.is32Bit() && "Expecting 32 bit target")(static_cast <bool> (Subtarget.is32Bit() && "Expecting 32 bit target" ) ? void (0) : __assert_fail ("Subtarget.is32Bit() && \"Expecting 32 bit target\"" , "llvm/lib/Target/X86/X86ISelLowering.cpp", 3182, __extension__ __PRETTY_FUNCTION__)); |
| 3183 | assert(VA.getValVT() == MVT::v64i1 &&(static_cast <bool> (VA.getValVT() == MVT::v64i1 && "Expecting first location of 64 bit width type") ? void (0) : __assert_fail ("VA.getValVT() == MVT::v64i1 && \"Expecting first location of 64 bit width type\"" , "llvm/lib/Target/X86/X86ISelLowering.cpp", 3184, __extension__ __PRETTY_FUNCTION__)) |
| 3184 | "Expecting first location of 64 bit width type")(static_cast <bool> (VA.getValVT() == MVT::v64i1 && "Expecting first location of 64 bit width type") ? void (0) : __assert_fail ("VA.getValVT() == MVT::v64i1 && \"Expecting first location of 64 bit width type\"" , "llvm/lib/Target/X86/X86ISelLowering.cpp", 3184, __extension__ __PRETTY_FUNCTION__)); |
| 3185 | assert(NextVA.getValVT() == VA.getValVT() &&(static_cast <bool> (NextVA.getValVT() == VA.getValVT() && "The locations should have the same type") ? void (0) : __assert_fail ("NextVA.getValVT() == VA.getValVT() && \"The locations should have the same type\"" , "llvm/lib/Target/X86/X86ISelLowering.cpp", 3186, __extension__ __PRETTY_FUNCTION__)) |
| 3186 | "The locations should have the same type")(static_cast <bool> (NextVA.getValVT() == VA.getValVT() && "The locations should have the same type") ? void (0) : __assert_fail ("NextVA.getValVT() == VA.getValVT() && \"The locations should have the same type\"" , "llvm/lib/Target/X86/X86ISelLowering.cpp", 3186, __extension__ __PRETTY_FUNCTION__)); |
| 3187 | assert(VA.isRegLoc() && NextVA.isRegLoc() &&(static_cast <bool> (VA.isRegLoc() && NextVA.isRegLoc () && "The values should reside in two registers") ? void (0) : __assert_fail ("VA.isRegLoc() && NextVA.isRegLoc() && \"The values should reside in two registers\"" , "llvm/lib/Target/X86/X86ISelLowering.cpp", 3188, __extension__ __PRETTY_FUNCTION__)) |
| 3188 | "The values should reside in two registers")(static_cast <bool> (VA.isRegLoc() && NextVA.isRegLoc () && "The values should reside in two registers") ? void (0) : __assert_fail ("VA.isRegLoc() && NextVA.isRegLoc() && \"The values should reside in two registers\"" , "llvm/lib/Target/X86/X86ISelLowering.cpp", 3188, __extension__ __PRETTY_FUNCTION__)); |
| 3189 | |
| 3190 | SDValue Lo, Hi; |
| 3191 | SDValue ArgValueLo, ArgValueHi; |
| 3192 | |
| 3193 | MachineFunction &MF = DAG.getMachineFunction(); |
| 3194 | const TargetRegisterClass *RC = &X86::GR32RegClass; |
| 3195 | |
| 3196 | // Read a 32 bit value from the registers. |
| 3197 | if (nullptr == InFlag) { |
| 3198 | // When no physical register is present, |
| 3199 | // create an intermediate virtual register. |
| 3200 | Register Reg = MF.addLiveIn(VA.getLocReg(), RC); |
| 3201 | ArgValueLo = DAG.getCopyFromReg(Root, Dl, Reg, MVT::i32); |
| 3202 | Reg = MF.addLiveIn(NextVA.getLocReg(), RC); |
| 3203 | ArgValueHi = DAG.getCopyFromReg(Root, Dl, Reg, MVT::i32); |
| 3204 | } else { |
| 3205 | // When a physical register is available read the value from it and glue |
| 3206 | // the reads together. |
| 3207 | ArgValueLo = |
| 3208 | DAG.getCopyFromReg(Root, Dl, VA.getLocReg(), MVT::i32, *InFlag); |
| 3209 | *InFlag = ArgValueLo.getValue(2); |
| 3210 | ArgValueHi = |
| 3211 | DAG.getCopyFromReg(Root, Dl, NextVA.getLocReg(), MVT::i32, *InFlag); |
| 3212 | *InFlag = ArgValueHi.getValue(2); |
| 3213 | } |
| 3214 | |
| 3215 | // Convert the i32 type into v32i1 type. |
| 3216 | Lo = DAG.getBitcast(MVT::v32i1, ArgValueLo); |
| 3217 | |
| 3218 | // Convert the i32 type into v32i1 type. |
| 3219 | Hi = DAG.getBitcast(MVT::v32i1, ArgValueHi); |
| 3220 | |
| 3221 | // Concatenate the two values together. |
| 3222 | return DAG.getNode(ISD::CONCAT_VECTORS, Dl, MVT::v64i1, Lo, Hi); |
| 3223 | } |
| 3224 | |
| 3225 | /// The function will lower a register of various sizes (8/16/32/64) |
| 3226 | /// to a mask value of the expected size (v8i1/v16i1/v32i1/v64i1) |
| 3227 | /// \returns a DAG node contains the operand after lowering to mask type. |
| 3228 | static SDValue lowerRegToMasks(const SDValue &ValArg, const EVT &ValVT, |
| 3229 | const EVT &ValLoc, const SDLoc &Dl, |
| 3230 | SelectionDAG &DAG) { |
| 3231 | SDValue ValReturned = ValArg; |
| 3232 | |
| 3233 | if (ValVT == MVT::v1i1) |
| 3234 | return DAG.getNode(ISD::SCALAR_TO_VECTOR, Dl, MVT::v1i1, ValReturned); |
| 3235 | |
| 3236 | if (ValVT == MVT::v64i1) { |
| 3237 | // In 32 bit machine, this case is handled by getv64i1Argument |
| 3238 | assert(ValLoc == MVT::i64 && "Expecting only i64 locations")(static_cast <bool> (ValLoc == MVT::i64 && "Expecting only i64 locations" ) ? void (0) : __assert_fail ("ValLoc == MVT::i64 && \"Expecting only i64 locations\"" , "llvm/lib/Target/X86/X86ISelLowering.cpp", 3238, __extension__ __PRETTY_FUNCTION__)); |
| 3239 | // In 64 bit machine, There is no need to truncate the value only bitcast |
| 3240 | } else { |
| 3241 | MVT maskLen; |
| 3242 | switch (ValVT.getSimpleVT().SimpleTy) { |
| 3243 | case MVT::v8i1: |
| 3244 | maskLen = MVT::i8; |
| 3245 | break; |
| 3246 | case MVT::v16i1: |
| 3247 | maskLen = MVT::i16; |
| 3248 | break; |
| 3249 | case MVT::v32i1: |
| 3250 | maskLen = MVT::i32; |
| 3251 | break; |
| 3252 | default: |
| 3253 | llvm_unreachable("Expecting a vector of i1 types")::llvm::llvm_unreachable_internal("Expecting a vector of i1 types" , "llvm/lib/Target/X86/X86ISelLowering.cpp", 3253); |
| 3254 | } |
| 3255 | |
| 3256 | ValReturned = DAG.getNode(ISD::TRUNCATE, Dl, maskLen, ValReturned); |
| 3257 | } |
| 3258 | return DAG.getBitcast(ValVT, ValReturned); |
| 3259 | } |
| 3260 | |
| 3261 | /// Lower the result values of a call into the |
| 3262 | /// appropriate copies out of appropriate physical registers. |
| 3263 | /// |
| 3264 | SDValue X86TargetLowering::LowerCallResult( |
| 3265 | SDValue Chain, SDValue InFlag, CallingConv::ID CallConv, bool isVarArg, |
| 3266 | const SmallVectorImpl<ISD::InputArg> &Ins, const SDLoc &dl, |
| 3267 | SelectionDAG &DAG, SmallVectorImpl<SDValue> &InVals, |
| 3268 | uint32_t *RegMask) const { |
| 3269 | |
| 3270 | const TargetRegisterInfo *TRI = Subtarget.getRegisterInfo(); |
| 3271 | // Assign locations to each value returned by this call. |
| 3272 | SmallVector<CCValAssign, 16> RVLocs; |
| 3273 | CCState CCInfo(CallConv, isVarArg, DAG.getMachineFunction(), RVLocs, |
| 3274 | *DAG.getContext()); |
| 3275 | CCInfo.AnalyzeCallResult(Ins, RetCC_X86); |
| 3276 | |
| 3277 | // Copy all of the result registers out of their specified physreg. |
| 3278 | for (unsigned I = 0, InsIndex = 0, E = RVLocs.size(); I != E; |
| 3279 | ++I, ++InsIndex) { |
| 3280 | CCValAssign &VA = RVLocs[I]; |
| 3281 | EVT CopyVT = VA.getLocVT(); |
| 3282 | |
| 3283 | // In some calling conventions we need to remove the used registers |
| 3284 | // from the register mask. |
| 3285 | if (RegMask) { |
| 3286 | for (MCSubRegIterator SubRegs(VA.getLocReg(), TRI, /*IncludeSelf=*/true); |
| 3287 | SubRegs.isValid(); ++SubRegs) |
| 3288 | RegMask[*SubRegs / 32] &= ~(1u << (*SubRegs % 32)); |
| 3289 | } |
| 3290 | |
| 3291 | // Report an error if there was an attempt to return FP values via XMM |
| 3292 | // registers. |
| 3293 | if (!Subtarget.hasSSE1() && X86::FR32XRegClass.contains(VA.getLocReg())) { |
| 3294 | errorUnsupported(DAG, dl, "SSE register return with SSE disabled"); |
| 3295 | if (VA.getLocReg() == X86::XMM1) |
| 3296 | VA.convertToReg(X86::FP1); // Set reg to FP1, avoid hitting asserts. |
| 3297 | else |
| 3298 | VA.convertToReg(X86::FP0); // Set reg to FP0, avoid hitting asserts. |
| 3299 | } else if (!Subtarget.hasSSE2() && |
| 3300 | X86::FR64XRegClass.contains(VA.getLocReg()) && |
| 3301 | CopyVT == MVT::f64) { |
| 3302 | errorUnsupported(DAG, dl, "SSE2 register return with SSE2 disabled"); |
| 3303 | if (VA.getLocReg() == X86::XMM1) |
| 3304 | VA.convertToReg(X86::FP1); // Set reg to FP1, avoid hitting asserts. |
| 3305 | else |
| 3306 | VA.convertToReg(X86::FP0); // Set reg to FP0, avoid hitting asserts. |
| 3307 | } |
| 3308 | |
| 3309 | // If we prefer to use the value in xmm registers, copy it out as f80 and |
| 3310 | // use a truncate to move it from fp stack reg to xmm reg. |
| 3311 | bool RoundAfterCopy = false; |
| 3312 | if ((VA.getLocReg() == X86::FP0 || VA.getLocReg() == X86::FP1) && |
| 3313 | isScalarFPTypeInSSEReg(VA.getValVT())) { |
| 3314 | if (!Subtarget.hasX87()) |
| 3315 | report_fatal_error("X87 register return with X87 disabled"); |
| 3316 | CopyVT = MVT::f80; |
| 3317 | RoundAfterCopy = (CopyVT != VA.getLocVT()); |
| 3318 | } |
| 3319 | |
| 3320 | SDValue Val; |
| 3321 | if (VA.needsCustom()) { |
| 3322 | assert(VA.getValVT() == MVT::v64i1 &&(static_cast <bool> (VA.getValVT() == MVT::v64i1 && "Currently the only custom case is when we split v64i1 to 2 regs" ) ? void (0) : __assert_fail ("VA.getValVT() == MVT::v64i1 && \"Currently the only custom case is when we split v64i1 to 2 regs\"" , "llvm/lib/Target/X86/X86ISelLowering.cpp", 3323, __extension__ __PRETTY_FUNCTION__)) |
| 3323 | "Currently the only custom case is when we split v64i1 to 2 regs")(static_cast <bool> (VA.getValVT() == MVT::v64i1 && "Currently the only custom case is when we split v64i1 to 2 regs" ) ? void (0) : __assert_fail ("VA.getValVT() == MVT::v64i1 && \"Currently the only custom case is when we split v64i1 to 2 regs\"" , "llvm/lib/Target/X86/X86ISelLowering.cpp", 3323, __extension__ __PRETTY_FUNCTION__)); |
| 3324 | Val = |
| 3325 | getv64i1Argument(VA, RVLocs[++I], Chain, DAG, dl, Subtarget, &InFlag); |
| 3326 | } else { |
| 3327 | Chain = DAG.getCopyFromReg(Chain, dl, VA.getLocReg(), CopyVT, InFlag) |
| 3328 | .getValue(1); |
| 3329 | Val = Chain.getValue(0); |
| 3330 | InFlag = Chain.getValue(2); |
| 3331 | } |
| 3332 | |
| 3333 | if (RoundAfterCopy) |
| 3334 | Val = DAG.getNode(ISD::FP_ROUND, dl, VA.getValVT(), Val, |
| 3335 | // This truncation won't change the value. |
| 3336 | DAG.getIntPtrConstant(1, dl)); |
| 3337 | |
| 3338 | if (VA.isExtInLoc()) { |
| 3339 | if (VA.getValVT().isVector() && |
| 3340 | VA.getValVT().getScalarType() == MVT::i1 && |
| 3341 | ((VA.getLocVT() == MVT::i64) || (VA.getLocVT() == MVT::i32) || |
| 3342 | (VA.getLocVT() == MVT::i16) || (VA.getLocVT() == MVT::i8))) { |
| 3343 | // promoting a mask type (v*i1) into a register of type i64/i32/i16/i8 |
| 3344 | Val = lowerRegToMasks(Val, VA.getValVT(), VA.getLocVT(), dl, DAG); |
| 3345 | } else |
| 3346 | Val = DAG.getNode(ISD::TRUNCATE, dl, VA.getValVT(), Val); |
| 3347 | } |
| 3348 | |
| 3349 | if (VA.getLocInfo() == CCValAssign::BCvt) |
| 3350 | Val = DAG.getBitcast(VA.getValVT(), Val); |
| 3351 | |
| 3352 | InVals.push_back(Val); |
| 3353 | } |
| 3354 | |
| 3355 | return Chain; |
| 3356 | } |
| 3357 | |
| 3358 | //===----------------------------------------------------------------------===// |
| 3359 | // C & StdCall & Fast Calling Convention implementation |
| 3360 | //===----------------------------------------------------------------------===// |
| 3361 | // StdCall calling convention seems to be standard for many Windows' API |
| 3362 | // routines and around. It differs from C calling convention just a little: |
| 3363 | // callee should clean up the stack, not caller. Symbols should be also |
| 3364 | // decorated in some fancy way :) It doesn't support any vector arguments. |
| 3365 | // For info on fast calling convention see Fast Calling Convention (tail call) |
| 3366 | // implementation LowerX86_32FastCCCallTo. |
| 3367 | |
| 3368 | /// Determines whether Args, either a set of outgoing arguments to a call, or a |
| 3369 | /// set of incoming args of a call, contains an sret pointer that the callee |
| 3370 | /// pops |
| 3371 | template <typename T> |
| 3372 | static bool hasCalleePopSRet(const SmallVectorImpl<T> &Args, |
| 3373 | const X86Subtarget &Subtarget) { |
| 3374 | // Not C++20 (yet), so no concepts available. |
| 3375 | static_assert(std::is_same<T, ISD::OutputArg>::value || |
| 3376 | std::is_same<T, ISD::InputArg>::value, |
| 3377 | "requires ISD::OutputArg or ISD::InputArg"); |
| 3378 | |
| 3379 | // Only 32-bit pops the sret. It's a 64-bit world these days, so early-out |
| 3380 | // for most compilations. |
| 3381 | if (!Subtarget.is32Bit()) |
| 3382 | return false; |
| 3383 | |
| 3384 | if (Args.empty()) |
| 3385 | return false; |
| 3386 | |
| 3387 | // Most calls do not have an sret argument, check the arg next. |
| 3388 | const ISD::ArgFlagsTy &Flags = Args[0].Flags; |
| 3389 | if (!Flags.isSRet() || Flags.isInReg()) |
| 3390 | return false; |
| 3391 | |
| 3392 | // The MSVCabi does not pop the sret. |
| 3393 | if (Subtarget.getTargetTriple().isOSMSVCRT()) |
| 3394 | return false; |
| 3395 | |
| 3396 | // MCUs don't pop the sret |
| 3397 | if (Subtarget.isTargetMCU()) |
| 3398 | return false; |
| 3399 | |
| 3400 | // Callee pops argument |
| 3401 | return true; |
| 3402 | } |
| 3403 | |
| 3404 | /// Make a copy of an aggregate at address specified by "Src" to address |
| 3405 | /// "Dst" with size and alignment information specified by the specific |
| 3406 | /// parameter attribute. The copy will be passed as a byval function parameter. |
| 3407 | static SDValue CreateCopyOfByValArgument(SDValue Src, SDValue Dst, |
| 3408 | SDValue Chain, ISD::ArgFlagsTy Flags, |
| 3409 | SelectionDAG &DAG, const SDLoc &dl) { |
| 3410 | SDValue SizeNode = DAG.getIntPtrConstant(Flags.getByValSize(), dl); |
| 3411 | |
| 3412 | return DAG.getMemcpy( |
| 3413 | Chain, dl, Dst, Src, SizeNode, Flags.getNonZeroByValAlign(), |
| 3414 | /*isVolatile*/ false, /*AlwaysInline=*/true, |
| 3415 | /*isTailCall*/ false, MachinePointerInfo(), MachinePointerInfo()); |
| 3416 | } |
| 3417 | |
| 3418 | /// Return true if the calling convention is one that we can guarantee TCO for. |
| 3419 | static bool canGuaranteeTCO(CallingConv::ID CC) { |
| 3420 | return (CC == CallingConv::Fast || CC == CallingConv::GHC || |
| 3421 | CC == CallingConv::X86_RegCall || CC == CallingConv::HiPE || |
| 3422 | CC == CallingConv::HHVM || CC == CallingConv::Tail || |
| 3423 | CC == CallingConv::SwiftTail); |
| 3424 | } |
| 3425 | |
| 3426 | /// Return true if we might ever do TCO for calls with this calling convention. |
| 3427 | static bool mayTailCallThisCC(CallingConv::ID CC) { |
| 3428 | switch (CC) { |
| 3429 | // C calling conventions: |
| 3430 | case CallingConv::C: |
| 3431 | case CallingConv::Win64: |
| 3432 | case CallingConv::X86_64_SysV: |
| 3433 | // Callee pop conventions: |
| 3434 | case CallingConv::X86_ThisCall: |
| 3435 | case CallingConv::X86_StdCall: |
| 3436 | case CallingConv::X86_VectorCall: |
| 3437 | case CallingConv::X86_FastCall: |
| 3438 | // Swift: |
| 3439 | case CallingConv::Swift: |
| 3440 | return true; |
| 3441 | default: |
| 3442 | return canGuaranteeTCO(CC); |
| 3443 | } |
| 3444 | } |
| 3445 | |
| 3446 | /// Return true if the function is being made into a tailcall target by |
| 3447 | /// changing its ABI. |
| 3448 | static bool shouldGuaranteeTCO(CallingConv::ID CC, bool GuaranteedTailCallOpt) { |
| 3449 | return (GuaranteedTailCallOpt && canGuaranteeTCO(CC)) || |
| 3450 | CC == CallingConv::Tail || CC == CallingConv::SwiftTail; |
| 3451 | } |
| 3452 | |
| 3453 | bool X86TargetLowering::mayBeEmittedAsTailCall(const CallInst *CI) const { |
| 3454 | if (!CI->isTailCall()) |
| 3455 | return false; |
| 3456 | |
| 3457 | CallingConv::ID CalleeCC = CI->getCallingConv(); |
| 3458 | if (!mayTailCallThisCC(CalleeCC)) |
| 3459 | return false; |
| 3460 | |
| 3461 | return true; |
| 3462 | } |
| 3463 | |
| 3464 | SDValue |
| 3465 | X86TargetLowering::LowerMemArgument(SDValue Chain, CallingConv::ID CallConv, |
| 3466 | const SmallVectorImpl<ISD::InputArg> &Ins, |
| 3467 | const SDLoc &dl, SelectionDAG &DAG, |
| 3468 | const CCValAssign &VA, |
| 3469 | MachineFrameInfo &MFI, unsigned i) const { |
| 3470 | // Create the nodes corresponding to a load from this parameter slot. |
| 3471 | ISD::ArgFlagsTy Flags = Ins[i].Flags; |
| 3472 | bool AlwaysUseMutable = shouldGuaranteeTCO( |
| 3473 | CallConv, DAG.getTarget().Options.GuaranteedTailCallOpt); |
| 3474 | bool isImmutable = !AlwaysUseMutable && !Flags.isByVal(); |
| 3475 | EVT ValVT; |
| 3476 | MVT PtrVT = getPointerTy(DAG.getDataLayout()); |
| 3477 | |
| 3478 | // If value is passed by pointer we have address passed instead of the value |
| 3479 | // itself. No need to extend if the mask value and location share the same |
| 3480 | // absolute size. |
| 3481 | bool ExtendedInMem = |
| 3482 | VA.isExtInLoc() && VA.getValVT().getScalarType() == MVT::i1 && |
| 3483 | VA.getValVT().getSizeInBits() != VA.getLocVT().getSizeInBits(); |
| 3484 | |
| 3485 | if (VA.getLocInfo() == CCValAssign::Indirect || ExtendedInMem) |
| 3486 | ValVT = VA.getLocVT(); |
| 3487 | else |
| 3488 | ValVT = VA.getValVT(); |
| 3489 | |
| 3490 | // FIXME: For now, all byval parameter objects are marked mutable. This can be |
| 3491 | // changed with more analysis. |
| 3492 | // In case of tail call optimization mark all arguments mutable. Since they |
| 3493 | // could be overwritten by lowering of arguments in case of a tail call. |
| 3494 | if (Flags.isByVal()) { |
| 3495 | unsigned Bytes = Flags.getByValSize(); |
| 3496 | if (Bytes == 0) Bytes = 1; // Don't create zero-sized stack objects. |
| 3497 | |
| 3498 | // FIXME: For now, all byval parameter objects are marked as aliasing. This |
| 3499 | // can be improved with deeper analysis. |
| 3500 | int FI = MFI.CreateFixedObject(Bytes, VA.getLocMemOffset(), isImmutable, |
| 3501 | /*isAliased=*/true); |
| 3502 | return DAG.getFrameIndex(FI, PtrVT); |
| 3503 | } |
| 3504 | |
| 3505 | EVT ArgVT = Ins[i].ArgVT; |
| 3506 | |
| 3507 | // If this is a vector that has been split into multiple parts, and the |
| 3508 | // scalar size of the parts don't match the vector element size, then we can't |
| 3509 | // elide the copy. The parts will have padding between them instead of being |
| 3510 | // packed like a vector. |
| 3511 | bool ScalarizedAndExtendedVector = |
| 3512 | ArgVT.isVector() && !VA.getLocVT().isVector() && |
| 3513 | VA.getLocVT().getSizeInBits() != ArgVT.getScalarSizeInBits(); |
| 3514 | |
| 3515 | // This is an argument in memory. We might be able to perform copy elision. |
| 3516 | // If the argument is passed directly in memory without any extension, then we |
| 3517 | // can perform copy elision. Large vector types, for example, may be passed |
| 3518 | // indirectly by pointer. |
| 3519 | if (Flags.isCopyElisionCandidate() && |
| 3520 | VA.getLocInfo() != CCValAssign::Indirect && !ExtendedInMem && |
| 3521 | !ScalarizedAndExtendedVector) { |
| 3522 | SDValue PartAddr; |
| 3523 | if (Ins[i].PartOffset == 0) { |
| 3524 | // If this is a one-part value or the first part of a multi-part value, |
| 3525 | // create a stack object for the entire argument value type and return a |
| 3526 | // load from our portion of it. This assumes that if the first part of an |
| 3527 | // argument is in memory, the rest will also be in memory. |
| 3528 | int FI = MFI.CreateFixedObject(ArgVT.getStoreSize(), VA.getLocMemOffset(), |
| 3529 | /*IsImmutable=*/false); |
| 3530 | PartAddr = DAG.getFrameIndex(FI, PtrVT); |
| 3531 | return DAG.getLoad( |
| 3532 | ValVT, dl, Chain, PartAddr, |
| 3533 | MachinePointerInfo::getFixedStack(DAG.getMachineFunction(), FI)); |
| 3534 | } else { |
| 3535 | // This is not the first piece of an argument in memory. See if there is |
| 3536 | // already a fixed stack object including this offset. If so, assume it |
| 3537 | // was created by the PartOffset == 0 branch above and create a load from |
| 3538 | // the appropriate offset into it. |
| 3539 | int64_t PartBegin = VA.getLocMemOffset(); |
| 3540 | int64_t PartEnd = PartBegin + ValVT.getSizeInBits() / 8; |
| 3541 | int FI = MFI.getObjectIndexBegin(); |
| 3542 | for (; MFI.isFixedObjectIndex(FI); ++FI) { |
| 3543 | int64_t ObjBegin = MFI.getObjectOffset(FI); |
| 3544 | int64_t ObjEnd = ObjBegin + MFI.getObjectSize(FI); |
| 3545 | if (ObjBegin <= PartBegin && PartEnd <= ObjEnd) |
| 3546 | break; |
| 3547 | } |
| 3548 | if (MFI.isFixedObjectIndex(FI)) { |
| 3549 | SDValue Addr = |
| 3550 | DAG.getNode(ISD::ADD, dl, PtrVT, DAG.getFrameIndex(FI, PtrVT), |
| 3551 | DAG.getIntPtrConstant(Ins[i].PartOffset, dl)); |
| 3552 | return DAG.getLoad( |
| 3553 | ValVT, dl, Chain, Addr, |
| 3554 | MachinePointerInfo::getFixedStack(DAG.getMachineFunction(), FI, |
| 3555 | Ins[i].PartOffset)); |
| 3556 | } |
| 3557 | } |
| 3558 | } |
| 3559 | |
| 3560 | int FI = MFI.CreateFixedObject(ValVT.getSizeInBits() / 8, |
| 3561 | VA.getLocMemOffset(), isImmutable); |
| 3562 | |
| 3563 | // Set SExt or ZExt flag. |
| 3564 | if (VA.getLocInfo() == CCValAssign::ZExt) { |
| 3565 | MFI.setObjectZExt(FI, true); |
| 3566 | } else if (VA.getLocInfo() == CCValAssign::SExt) { |
| 3567 | MFI.setObjectSExt(FI, true); |
| 3568 | } |
| 3569 | |
| 3570 | MaybeAlign Alignment; |
| 3571 | if (Subtarget.isTargetWindowsMSVC() && !Subtarget.is64Bit() && |
| 3572 | ValVT != MVT::f80) |
| 3573 | Alignment = MaybeAlign(4); |
| 3574 | SDValue FIN = DAG.getFrameIndex(FI, PtrVT); |
| 3575 | SDValue Val = DAG.getLoad( |
| 3576 | ValVT, dl, Chain, FIN, |
| 3577 | MachinePointerInfo::getFixedStack(DAG.getMachineFunction(), FI), |
| 3578 | Alignment); |
| 3579 | return ExtendedInMem |
| 3580 | ? (VA.getValVT().isVector() |
| 3581 | ? DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VA.getValVT(), Val) |
| 3582 | : DAG.getNode(ISD::TRUNCATE, dl, VA.getValVT(), Val)) |
| 3583 | : Val; |
| 3584 | } |
| 3585 | |
| 3586 | // FIXME: Get this from tablegen. |
| 3587 | static ArrayRef<MCPhysReg> get64BitArgumentGPRs(CallingConv::ID CallConv, |
| 3588 | const X86Subtarget &Subtarget) { |
| 3589 | assert(Subtarget.is64Bit())(static_cast <bool> (Subtarget.is64Bit()) ? void (0) : __assert_fail ("Subtarget.is64Bit()", "llvm/lib/Target/X86/X86ISelLowering.cpp" , 3589, __extension__ __PRETTY_FUNCTION__)); |
| 3590 | |
| 3591 | if (Subtarget.isCallingConvWin64(CallConv)) { |
| 3592 | static const MCPhysReg GPR64ArgRegsWin64[] = { |
| 3593 | X86::RCX, X86::RDX, X86::R8, X86::R9 |
| 3594 | }; |
| 3595 | return makeArrayRef(std::begin(GPR64ArgRegsWin64), std::end(GPR64ArgRegsWin64)); |
| 3596 | } |
| 3597 | |
| 3598 | static const MCPhysReg GPR64ArgRegs64Bit[] = { |
| 3599 | X86::RDI, X86::RSI, X86::RDX, X86::RCX, X86::R8, X86::R9 |
| 3600 | }; |
| 3601 | return makeArrayRef(std::begin(GPR64ArgRegs64Bit), std::end(GPR64ArgRegs64Bit)); |
| 3602 | } |
| 3603 | |
| 3604 | // FIXME: Get this from tablegen. |
| 3605 | static ArrayRef<MCPhysReg> get64BitArgumentXMMs(MachineFunction &MF, |
| 3606 | CallingConv::ID CallConv, |
| 3607 | const X86Subtarget &Subtarget) { |
| 3608 | assert(Subtarget.is64Bit())(static_cast <bool> (Subtarget.is64Bit()) ? void (0) : __assert_fail ("Subtarget.is64Bit()", "llvm/lib/Target/X86/X86ISelLowering.cpp" , 3608, __extension__ __PRETTY_FUNCTION__)); |
| 3609 | if (Subtarget.isCallingConvWin64(CallConv)) { |
| 3610 | // The XMM registers which might contain var arg parameters are shadowed |
| 3611 | // in their paired GPR. So we only need to save the GPR to their home |
| 3612 | // slots. |
| 3613 | // TODO: __vectorcall will change this. |
| 3614 | return None; |
| 3615 | } |
| 3616 | |
| 3617 | bool isSoftFloat = Subtarget.useSoftFloat(); |
| 3618 | if (isSoftFloat || !Subtarget.hasSSE1()) |
| 3619 | // Kernel mode asks for SSE to be disabled, so there are no XMM argument |
| 3620 | // registers. |
| 3621 | return None; |
| 3622 | |
| 3623 | static const MCPhysReg XMMArgRegs64Bit[] = { |
| 3624 | X86::XMM0, X86::XMM1, X86::XMM2, X86::XMM3, |
| 3625 | X86::XMM4, X86::XMM5, X86::XMM6, X86::XMM7 |
| 3626 | }; |
| 3627 | return makeArrayRef(std::begin(XMMArgRegs64Bit), std::end(XMMArgRegs64Bit)); |
| 3628 | } |
| 3629 | |
| 3630 | #ifndef NDEBUG |
| 3631 | static bool isSortedByValueNo(ArrayRef<CCValAssign> ArgLocs) { |
| 3632 | return llvm::is_sorted( |
| 3633 | ArgLocs, [](const CCValAssign &A, const CCValAssign &B) -> bool { |
| 3634 | return A.getValNo() < B.getValNo(); |
| 3635 | }); |
| 3636 | } |
| 3637 | #endif |
| 3638 | |
| 3639 | namespace { |
| 3640 | /// This is a helper class for lowering variable arguments parameters. |
| 3641 | class VarArgsLoweringHelper { |
| 3642 | public: |
| 3643 | VarArgsLoweringHelper(X86MachineFunctionInfo *FuncInfo, const SDLoc &Loc, |
| 3644 | SelectionDAG &DAG, const X86Subtarget &Subtarget, |
| 3645 | CallingConv::ID CallConv, CCState &CCInfo) |
| 3646 | : FuncInfo(FuncInfo), DL(Loc), DAG(DAG), Subtarget(Subtarget), |
| 3647 | TheMachineFunction(DAG.getMachineFunction()), |
| 3648 | TheFunction(TheMachineFunction.getFunction()), |
| 3649 | FrameInfo(TheMachineFunction.getFrameInfo()), |
| 3650 | FrameLowering(*Subtarget.getFrameLowering()), |
| 3651 | TargLowering(DAG.getTargetLoweringInfo()), CallConv(CallConv), |
| 3652 | CCInfo(CCInfo) {} |
| 3653 | |
| 3654 | // Lower variable arguments parameters. |
| 3655 | void lowerVarArgsParameters(SDValue &Chain, unsigned StackSize); |
| 3656 | |
| 3657 | private: |
| 3658 | void createVarArgAreaAndStoreRegisters(SDValue &Chain, unsigned StackSize); |
| 3659 | |
| 3660 | void forwardMustTailParameters(SDValue &Chain); |
| 3661 | |
| 3662 | bool is64Bit() const { return Subtarget.is64Bit(); } |
| 3663 | bool isWin64() const { return Subtarget.isCallingConvWin64(CallConv); } |
| 3664 | |
| 3665 | X86MachineFunctionInfo *FuncInfo; |
| 3666 | const SDLoc &DL; |
| 3667 | SelectionDAG &DAG; |
| 3668 | const X86Subtarget &Subtarget; |
| 3669 | MachineFunction &TheMachineFunction; |
| 3670 | const Function &TheFunction; |
| 3671 | MachineFrameInfo &FrameInfo; |
| 3672 | const TargetFrameLowering &FrameLowering; |
| 3673 | const TargetLowering &TargLowering; |
| 3674 | CallingConv::ID CallConv; |
| 3675 | CCState &CCInfo; |
| 3676 | }; |
| 3677 | } // namespace |
| 3678 | |
| 3679 | void VarArgsLoweringHelper::createVarArgAreaAndStoreRegisters( |
| 3680 | SDValue &Chain, unsigned StackSize) { |
| 3681 | // If the function takes variable number of arguments, make a frame index for |
| 3682 | // the start of the first vararg value... for expansion of llvm.va_start. We |
| 3683 | // can skip this if there are no va_start calls. |
| 3684 | if (is64Bit() || (CallConv != CallingConv::X86_FastCall && |
| 3685 | CallConv != CallingConv::X86_ThisCall)) { |
| 3686 | FuncInfo->setVarArgsFrameIndex( |
| 3687 | FrameInfo.CreateFixedObject(1, StackSize, true)); |
| 3688 | } |
| 3689 | |
| 3690 | // 64-bit calling conventions support varargs and register parameters, so we |
| 3691 | // have to do extra work to spill them in the prologue. |
| 3692 | if (is64Bit()) { |
| 3693 | // Find the first unallocated argument registers. |
| 3694 | ArrayRef<MCPhysReg> ArgGPRs = get64BitArgumentGPRs(CallConv, Subtarget); |
| 3695 | ArrayRef<MCPhysReg> ArgXMMs = |
| 3696 | get64BitArgumentXMMs(TheMachineFunction, CallConv, Subtarget); |
| 3697 | unsigned NumIntRegs = CCInfo.getFirstUnallocated(ArgGPRs); |
| 3698 | unsigned NumXMMRegs = CCInfo.getFirstUnallocated(ArgXMMs); |
| 3699 | |
| 3700 | assert(!(NumXMMRegs && !Subtarget.hasSSE1()) &&(static_cast <bool> (!(NumXMMRegs && !Subtarget .hasSSE1()) && "SSE register cannot be used when SSE is disabled!" ) ? void (0) : __assert_fail ("!(NumXMMRegs && !Subtarget.hasSSE1()) && \"SSE register cannot be used when SSE is disabled!\"" , "llvm/lib/Target/X86/X86ISelLowering.cpp", 3701, __extension__ __PRETTY_FUNCTION__)) |
| 3701 | "SSE register cannot be used when SSE is disabled!")(static_cast <bool> (!(NumXMMRegs && !Subtarget .hasSSE1()) && "SSE register cannot be used when SSE is disabled!" ) ? void (0) : __assert_fail ("!(NumXMMRegs && !Subtarget.hasSSE1()) && \"SSE register cannot be used when SSE is disabled!\"" , "llvm/lib/Target/X86/X86ISelLowering.cpp", 3701, __extension__ __PRETTY_FUNCTION__)); |
| 3702 | |
| 3703 | if (isWin64()) { |
| 3704 | // Get to the caller-allocated home save location. Add 8 to account |
| 3705 | // for the return address. |
| 3706 | int HomeOffset = FrameLowering.getOffsetOfLocalArea() + 8; |
| 3707 | FuncInfo->setRegSaveFrameIndex( |
| 3708 | FrameInfo.CreateFixedObject(1, NumIntRegs * 8 + HomeOffset, false)); |
| 3709 | // Fixup to set vararg frame on shadow area (4 x i64). |
| 3710 | if (NumIntRegs < 4) |
| 3711 | FuncInfo->setVarArgsFrameIndex(FuncInfo->getRegSaveFrameIndex()); |
| 3712 | } else { |
| 3713 | // For X86-64, if there are vararg parameters that are passed via |
| 3714 | // registers, then we must store them to their spots on the stack so |
| 3715 | // they may be loaded by dereferencing the result of va_next. |
| 3716 | FuncInfo->setVarArgsGPOffset(NumIntRegs * 8); |
| 3717 | FuncInfo->setVarArgsFPOffset(ArgGPRs.size() * 8 + NumXMMRegs * 16); |
| 3718 | FuncInfo->setRegSaveFrameIndex(FrameInfo.CreateStackObject( |
| 3719 | ArgGPRs.size() * 8 + ArgXMMs.size() * 16, Align(16), false)); |
| 3720 | } |
| 3721 | |
| 3722 | SmallVector<SDValue, 6> |
| 3723 | LiveGPRs; // list of SDValue for GPR registers keeping live input value |
| 3724 | SmallVector<SDValue, 8> LiveXMMRegs; // list of SDValue for XMM registers |
| 3725 | // keeping live input value |
| 3726 | SDValue ALVal; // if applicable keeps SDValue for %al register |
| 3727 | |
| 3728 | // Gather all the live in physical registers. |
| 3729 | for (MCPhysReg Reg : ArgGPRs.slice(NumIntRegs)) { |
| 3730 | Register GPR = TheMachineFunction.addLiveIn(Reg, &X86::GR64RegClass); |
| 3731 | LiveGPRs.push_back(DAG.getCopyFromReg(Chain, DL, GPR, MVT::i64)); |
| 3732 | } |
| 3733 | const auto &AvailableXmms = ArgXMMs.slice(NumXMMRegs); |
| 3734 | if (!AvailableXmms.empty()) { |
| 3735 | Register AL = TheMachineFunction.addLiveIn(X86::AL, &X86::GR8RegClass); |
| 3736 | ALVal = DAG.getCopyFromReg(Chain, DL, AL, MVT::i8); |
| 3737 | for (MCPhysReg Reg : AvailableXmms) { |
| 3738 | // FastRegisterAllocator spills virtual registers at basic |
| 3739 | // block boundary. That leads to usages of xmm registers |
| 3740 | // outside of check for %al. Pass physical registers to |
| 3741 | // VASTART_SAVE_XMM_REGS to avoid unneccessary spilling. |
| 3742 | TheMachineFunction.getRegInfo().addLiveIn(Reg); |
| 3743 | LiveXMMRegs.push_back(DAG.getRegister(Reg, MVT::v4f32)); |
| 3744 | } |
| 3745 | } |
| 3746 | |
| 3747 | // Store the integer parameter registers. |
| 3748 | SmallVector<SDValue, 8> MemOps; |
| 3749 | SDValue RSFIN = |
| 3750 | DAG.getFrameIndex(FuncInfo->getRegSaveFrameIndex(), |
| 3751 | TargLowering.getPointerTy(DAG.getDataLayout())); |
| 3752 | unsigned Offset = FuncInfo->getVarArgsGPOffset(); |
| 3753 | for (SDValue Val : LiveGPRs) { |
| 3754 | SDValue FIN = DAG.getNode(ISD::ADD, DL, |
| 3755 | TargLowering.getPointerTy(DAG.getDataLayout()), |
| 3756 | RSFIN, DAG.getIntPtrConstant(Offset, DL)); |
| 3757 | SDValue Store = |
| 3758 | DAG.getStore(Val.getValue(1), DL, Val, FIN, |
| 3759 | MachinePointerInfo::getFixedStack( |
| 3760 | DAG.getMachineFunction(), |
| 3761 | FuncInfo->getRegSaveFrameIndex(), Offset)); |
| 3762 | MemOps.push_back(Store); |
| 3763 | Offset += 8; |
| 3764 | } |
| 3765 | |
| 3766 | // Now store the XMM (fp + vector) parameter registers. |
| 3767 | if (!LiveXMMRegs.empty()) { |
| 3768 | SmallVector<SDValue, 12> SaveXMMOps; |
| 3769 | SaveXMMOps.push_back(Chain); |
| 3770 | SaveXMMOps.push_back(ALVal); |
| 3771 | SaveXMMOps.push_back(RSFIN); |
| 3772 | SaveXMMOps.push_back( |
| 3773 | DAG.getTargetConstant(FuncInfo->getVarArgsFPOffset(), DL, MVT::i32)); |
| 3774 | llvm::append_range(SaveXMMOps, LiveXMMRegs); |
| 3775 | MachineMemOperand *StoreMMO = |
| 3776 | DAG.getMachineFunction().getMachineMemOperand( |
| 3777 | MachinePointerInfo::getFixedStack( |
| 3778 | DAG.getMachineFunction(), FuncInfo->getRegSaveFrameIndex(), |
| 3779 | Offset), |
| 3780 | MachineMemOperand::MOStore, 128, Align(16)); |
| 3781 | MemOps.push_back(DAG.getMemIntrinsicNode(X86ISD::VASTART_SAVE_XMM_REGS, |
| 3782 | DL, DAG.getVTList(MVT::Other), |
| 3783 | SaveXMMOps, MVT::i8, StoreMMO)); |
| 3784 | } |
| 3785 | |
| 3786 | if (!MemOps.empty()) |
| 3787 | Chain = DAG.getNode(ISD::TokenFactor, DL, MVT::Other, MemOps); |
| 3788 | } |
| 3789 | } |
| 3790 | |
| 3791 | void VarArgsLoweringHelper::forwardMustTailParameters(SDValue &Chain) { |
| 3792 | // Find the largest legal vector type. |
| 3793 | MVT VecVT = MVT::Other; |
| 3794 | // FIXME: Only some x86_32 calling conventions support AVX512. |
| 3795 | if (Subtarget.useAVX512Regs() && |
| 3796 | (is64Bit() || (CallConv == CallingConv::X86_VectorCall || |
| 3797 | CallConv == CallingConv::Intel_OCL_BI))) |
| 3798 | VecVT = MVT::v16f32; |
| 3799 | else if (Subtarget.hasAVX()) |
| 3800 | VecVT = MVT::v8f32; |
| 3801 | else if (Subtarget.hasSSE2()) |
| 3802 | VecVT = MVT::v4f32; |
| 3803 | |
| 3804 | // We forward some GPRs and some vector types. |
| 3805 | SmallVector<MVT, 2> RegParmTypes; |
| 3806 | MVT IntVT = is64Bit() ? MVT::i64 : MVT::i32; |
| 3807 | RegParmTypes.push_back(IntVT); |
| 3808 | if (VecVT != MVT::Other) |
| 3809 | RegParmTypes.push_back(VecVT); |
| 3810 | |
| 3811 | // Compute the set of forwarded registers. The rest are scratch. |
| 3812 | SmallVectorImpl<ForwardedRegister> &Forwards = |
| 3813 | FuncInfo->getForwardedMustTailRegParms(); |
| 3814 | CCInfo.analyzeMustTailForwardedRegisters(Forwards, RegParmTypes, CC_X86); |
| 3815 | |
| 3816 | // Forward AL for SysV x86_64 targets, since it is used for varargs. |
| 3817 | if (is64Bit() && !isWin64() && !CCInfo.isAllocated(X86::AL)) { |
| 3818 | Register ALVReg = TheMachineFunction.addLiveIn(X86::AL, &X86::GR8RegClass); |
| 3819 | Forwards.push_back(ForwardedRegister(ALVReg, X86::AL, MVT::i8)); |
| 3820 | } |
| 3821 | |
| 3822 | // Copy all forwards from physical to virtual registers. |
| 3823 | for (ForwardedRegister &FR : Forwards) { |
| 3824 | // FIXME: Can we use a less constrained schedule? |
| 3825 | SDValue RegVal = DAG.getCopyFromReg(Chain, DL, FR.VReg, FR.VT); |
| 3826 | FR.VReg = TheMachineFunction.getRegInfo().createVirtualRegister( |
| 3827 | TargLowering.getRegClassFor(FR.VT)); |
| 3828 | Chain = DAG.getCopyToReg(Chain, DL, FR.VReg, RegVal); |
| 3829 | } |
| 3830 | } |
| 3831 | |
| 3832 | void VarArgsLoweringHelper::lowerVarArgsParameters(SDValue &Chain, |
| 3833 | unsigned StackSize) { |
| 3834 | // Set FrameIndex to the 0xAAAAAAA value to mark unset state. |
| 3835 | // If necessary, it would be set into the correct value later. |
| 3836 | FuncInfo->setVarArgsFrameIndex(0xAAAAAAA); |
| 3837 | FuncInfo->setRegSaveFrameIndex(0xAAAAAAA); |
| 3838 | |
| 3839 | if (FrameInfo.hasVAStart()) |
| 3840 | createVarArgAreaAndStoreRegisters(Chain, StackSize); |
| 3841 | |
| 3842 | if (FrameInfo.hasMustTailInVarArgFunc()) |
| 3843 | forwardMustTailParameters(Chain); |
| 3844 | } |
| 3845 | |
| 3846 | SDValue X86TargetLowering::LowerFormalArguments( |
| 3847 | SDValue Chain, CallingConv::ID CallConv, bool IsVarArg, |
| 3848 | const SmallVectorImpl<ISD::InputArg> &Ins, const SDLoc &dl, |
| 3849 | SelectionDAG &DAG, SmallVectorImpl<SDValue> &InVals) const { |
| 3850 | MachineFunction &MF = DAG.getMachineFunction(); |
| 3851 | X86MachineFunctionInfo *FuncInfo = MF.getInfo<X86MachineFunctionInfo>(); |
| 3852 | |
| 3853 | const Function &F = MF.getFunction(); |
| 3854 | if (F.hasExternalLinkage() && Subtarget.isTargetCygMing() && |
| 3855 | F.getName() == "main") |
| 3856 | FuncInfo->setForceFramePointer(true); |
| 3857 | |
| 3858 | MachineFrameInfo &MFI = MF.getFrameInfo(); |
| 3859 | bool Is64Bit = Subtarget.is64Bit(); |
| 3860 | bool IsWin64 = Subtarget.isCallingConvWin64(CallConv); |
| 3861 | |
| 3862 | assert((static_cast <bool> (!(IsVarArg && canGuaranteeTCO (CallConv)) && "Var args not supported with calling conv' regcall, fastcc, ghc or hipe" ) ? void (0) : __assert_fail ("!(IsVarArg && canGuaranteeTCO(CallConv)) && \"Var args not supported with calling conv' regcall, fastcc, ghc or hipe\"" , "llvm/lib/Target/X86/X86ISelLowering.cpp", 3864, __extension__ __PRETTY_FUNCTION__)) |
| 3863 | !(IsVarArg && canGuaranteeTCO(CallConv)) &&(static_cast <bool> (!(IsVarArg && canGuaranteeTCO (CallConv)) && "Var args not supported with calling conv' regcall, fastcc, ghc or hipe" ) ? void (0) : __assert_fail ("!(IsVarArg && canGuaranteeTCO(CallConv)) && \"Var args not supported with calling conv' regcall, fastcc, ghc or hipe\"" , "llvm/lib/Target/X86/X86ISelLowering.cpp", 3864, __extension__ __PRETTY_FUNCTION__)) |
| 3864 | "Var args not supported with calling conv' regcall, fastcc, ghc or hipe")(static_cast <bool> (!(IsVarArg && canGuaranteeTCO (CallConv)) && "Var args not supported with calling conv' regcall, fastcc, ghc or hipe" ) ? void (0) : __assert_fail ("!(IsVarArg && canGuaranteeTCO(CallConv)) && \"Var args not supported with calling conv' regcall, fastcc, ghc or hipe\"" , "llvm/lib/Target/X86/X86ISelLowering.cpp", 3864, __extension__ __PRETTY_FUNCTION__)); |
| 3865 | |
| 3866 | // Assign locations to all of the incoming arguments. |
| 3867 | SmallVector<CCValAssign, 16> ArgLocs; |
| 3868 | CCState CCInfo(CallConv, IsVarArg, MF, ArgLocs, *DAG.getContext()); |
| 3869 | |
| 3870 | // Allocate shadow area for Win64. |
| 3871 | if (IsWin64) |
| 3872 | CCInfo.AllocateStack(32, Align(8)); |
| 3873 | |
| 3874 | CCInfo.AnalyzeArguments(Ins, CC_X86); |
| 3875 | |
| 3876 | // In vectorcall calling convention a second pass is required for the HVA |
| 3877 | // types. |
| 3878 | if (CallingConv::X86_VectorCall == CallConv) { |
| 3879 | CCInfo.AnalyzeArgumentsSecondPass(Ins, CC_X86); |
| 3880 | } |
| 3881 | |
| 3882 | // The next loop assumes that the locations are in the same order of the |
| 3883 | // input arguments. |
| 3884 | assert(isSortedByValueNo(ArgLocs) &&(static_cast <bool> (isSortedByValueNo(ArgLocs) && "Argument Location list must be sorted before lowering") ? void (0) : __assert_fail ("isSortedByValueNo(ArgLocs) && \"Argument Location list must be sorted before lowering\"" , "llvm/lib/Target/X86/X86ISelLowering.cpp", 3885, __extension__ __PRETTY_FUNCTION__)) |
| 3885 | "Argument Location list must be sorted before lowering")(static_cast <bool> (isSortedByValueNo(ArgLocs) && "Argument Location list must be sorted before lowering") ? void (0) : __assert_fail ("isSortedByValueNo(ArgLocs) && \"Argument Location list must be sorted before lowering\"" , "llvm/lib/Target/X86/X86ISelLowering.cpp", 3885, __extension__ __PRETTY_FUNCTION__)); |
| 3886 | |
| 3887 | SDValue ArgValue; |
| 3888 | for (unsigned I = 0, InsIndex = 0, E = ArgLocs.size(); I != E; |
| 3889 | ++I, ++InsIndex) { |
| 3890 | assert(InsIndex < Ins.size() && "Invalid Ins index")(static_cast <bool> (InsIndex < Ins.size() && "Invalid Ins index") ? void (0) : __assert_fail ("InsIndex < Ins.size() && \"Invalid Ins index\"" , "llvm/lib/Target/X86/X86ISelLowering.cpp", 3890, __extension__ __PRETTY_FUNCTION__)); |
| 3891 | CCValAssign &VA = ArgLocs[I]; |
| 3892 | |
| 3893 | if (VA.isRegLoc()) { |
| 3894 | EVT RegVT = VA.getLocVT(); |
| 3895 | if (VA.needsCustom()) { |
| 3896 | assert((static_cast <bool> (VA.getValVT() == MVT::v64i1 && "Currently the only custom case is when we split v64i1 to 2 regs" ) ? void (0) : __assert_fail ("VA.getValVT() == MVT::v64i1 && \"Currently the only custom case is when we split v64i1 to 2 regs\"" , "llvm/lib/Target/X86/X86ISelLowering.cpp", 3898, __extension__ __PRETTY_FUNCTION__)) |
| 3897 | VA.getValVT() == MVT::v64i1 &&(static_cast <bool> (VA.getValVT() == MVT::v64i1 && "Currently the only custom case is when we split v64i1 to 2 regs" ) ? void (0) : __assert_fail ("VA.getValVT() == MVT::v64i1 && \"Currently the only custom case is when we split v64i1 to 2 regs\"" , "llvm/lib/Target/X86/X86ISelLowering.cpp", 3898, __extension__ __PRETTY_FUNCTION__)) |
| 3898 | "Currently the only custom case is when we split v64i1 to 2 regs")(static_cast <bool> (VA.getValVT() == MVT::v64i1 && "Currently the only custom case is when we split v64i1 to 2 regs" ) ? void (0) : __assert_fail ("VA.getValVT() == MVT::v64i1 && \"Currently the only custom case is when we split v64i1 to 2 regs\"" , "llvm/lib/Target/X86/X86ISelLowering.cpp", 3898, __extension__ __PRETTY_FUNCTION__)); |
| 3899 | |
| 3900 | // v64i1 values, in regcall calling convention, that are |
| 3901 | // compiled to 32 bit arch, are split up into two registers. |
| 3902 | ArgValue = |
| 3903 | getv64i1Argument(VA, ArgLocs[++I], Chain, DAG, dl, Subtarget); |
| 3904 | } else { |
| 3905 | const TargetRegisterClass *RC; |
| 3906 | if (RegVT == MVT::i8) |
| 3907 | RC = &X86::GR8RegClass; |
| 3908 | else if (RegVT == MVT::i16) |
| 3909 | RC = &X86::GR16RegClass; |
| 3910 | else if (RegVT == MVT::i32) |
| 3911 | RC = &X86::GR32RegClass; |
| 3912 | else if (Is64Bit && RegVT == MVT::i64) |
| 3913 | RC = &X86::GR64RegClass; |
| 3914 | else if (RegVT == MVT::f16) |
| 3915 | RC = &X86::FR16XRegClass; |
| 3916 | else if (RegVT == MVT::f32) |
| 3917 | RC = Subtarget.hasAVX512() ? &X86::FR32XRegClass : &X86::FR32RegClass; |
| 3918 | else if (RegVT == MVT::f64) |
| 3919 | RC = Subtarget.hasAVX512() ? &X86::FR64XRegClass : &X86::FR64RegClass; |
| 3920 | else if (RegVT == MVT::f80) |
| 3921 | RC = &X86::RFP80RegClass; |
| 3922 | else if (RegVT == MVT::f128) |
| 3923 | RC = &X86::VR128RegClass; |
| 3924 | else if (RegVT.is512BitVector()) |
| 3925 | RC = &X86::VR512RegClass; |
| 3926 | else if (RegVT.is256BitVector()) |
| 3927 | RC = Subtarget.hasVLX() ? &X86::VR256XRegClass : &X86::VR256RegClass; |
| 3928 | else if (RegVT.is128BitVector()) |
| 3929 | RC = Subtarget.hasVLX() ? &X86::VR128XRegClass : &X86::VR128RegClass; |
| 3930 | else if (RegVT == MVT::x86mmx) |
| 3931 | RC = &X86::VR64RegClass; |
| 3932 | else if (RegVT == MVT::v1i1) |
| 3933 | RC = &X86::VK1RegClass; |
| 3934 | else if (RegVT == MVT::v8i1) |
| 3935 | RC = &X86::VK8RegClass; |
| 3936 | else if (RegVT == MVT::v16i1) |
| 3937 | RC = &X86::VK16RegClass; |
| 3938 | else if (RegVT == MVT::v32i1) |
| 3939 | RC = &X86::VK32RegClass; |
| 3940 | else if (RegVT == MVT::v64i1) |
| 3941 | RC = &X86::VK64RegClass; |
| 3942 | else |
| 3943 | llvm_unreachable("Unknown argument type!")::llvm::llvm_unreachable_internal("Unknown argument type!", "llvm/lib/Target/X86/X86ISelLowering.cpp" , 3943); |
| 3944 | |
| 3945 | Register Reg = MF.addLiveIn(VA.getLocReg(), RC); |
| 3946 | ArgValue = DAG.getCopyFromReg(Chain, dl, Reg, RegVT); |
| 3947 | } |
| 3948 | |
| 3949 | // If this is an 8 or 16-bit value, it is really passed promoted to 32 |
| 3950 | // bits. Insert an assert[sz]ext to capture this, then truncate to the |
| 3951 | // right size. |
| 3952 | if (VA.getLocInfo() == CCValAssign::SExt) |
| 3953 | ArgValue = DAG.getNode(ISD::AssertSext, dl, RegVT, ArgValue, |
| 3954 | DAG.getValueType(VA.getValVT())); |
| 3955 | else if (VA.getLocInfo() == CCValAssign::ZExt) |
| 3956 | ArgValue = DAG.getNode(ISD::AssertZext, dl, RegVT, ArgValue, |
| 3957 | DAG.getValueType(VA.getValVT())); |
| 3958 | else if (VA.getLocInfo() == CCValAssign::BCvt) |
| 3959 | ArgValue = DAG.getBitcast(VA.getValVT(), ArgValue); |
| 3960 | |
| 3961 | if (VA.isExtInLoc()) { |
| 3962 | // Handle MMX values passed in XMM regs. |
| 3963 | if (RegVT.isVector() && VA.getValVT().getScalarType() != MVT::i1) |
| 3964 | ArgValue = DAG.getNode(X86ISD::MOVDQ2Q, dl, VA.getValVT(), ArgValue); |
| 3965 | else if (VA.getValVT().isVector() && |
| 3966 | VA.getValVT().getScalarType() == MVT::i1 && |
| 3967 | ((VA.getLocVT() == MVT::i64) || (VA.getLocVT() == MVT::i32) || |
| 3968 | (VA.getLocVT() == MVT::i16) || (VA.getLocVT() == MVT::i8))) { |
| 3969 | // Promoting a mask type (v*i1) into a register of type i64/i32/i16/i8 |
| 3970 | ArgValue = lowerRegToMasks(ArgValue, VA.getValVT(), RegVT, dl, DAG); |
| 3971 | } else |
| 3972 | ArgValue = DAG.getNode(ISD::TRUNCATE, dl, VA.getValVT(), ArgValue); |
| 3973 | } |
| 3974 | } else { |
| 3975 | assert(VA.isMemLoc())(static_cast <bool> (VA.isMemLoc()) ? void (0) : __assert_fail ("VA.isMemLoc()", "llvm/lib/Target/X86/X86ISelLowering.cpp", 3975, __extension__ __PRETTY_FUNCTION__)); |
| 3976 | ArgValue = |
| 3977 | LowerMemArgument(Chain, CallConv, Ins, dl, DAG, VA, MFI, InsIndex); |
| 3978 | } |
| 3979 | |
| 3980 | // If value is passed via pointer - do a load. |
| 3981 | if (VA.getLocInfo() == CCValAssign::Indirect && !Ins[I].Flags.isByVal()) |
| 3982 | ArgValue = |
| 3983 | DAG.getLoad(VA.getValVT(), dl, Chain, ArgValue, MachinePointerInfo()); |
| 3984 | |
| 3985 | InVals.push_back(ArgValue); |
| 3986 | } |
| 3987 | |
| 3988 | for (unsigned I = 0, E = Ins.size(); I != E; ++I) { |
| 3989 | if (Ins[I].Flags.isSwiftAsync()) { |
| 3990 | auto X86FI = MF.getInfo<X86MachineFunctionInfo>(); |
| 3991 | if (Subtarget.is64Bit()) |
| 3992 | X86FI->setHasSwiftAsyncContext(true); |
| 3993 | else { |
| 3994 | int FI = MF.getFrameInfo().CreateStackObject(4, Align(4), false); |
| 3995 | X86FI->setSwiftAsyncContextFrameIdx(FI); |
| 3996 | SDValue St = DAG.getStore(DAG.getEntryNode(), dl, InVals[I], |
| 3997 | DAG.getFrameIndex(FI, MVT::i32), |
| 3998 | MachinePointerInfo::getFixedStack(MF, FI)); |
| 3999 | Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, St, Chain); |
| 4000 | } |
| 4001 | } |
| 4002 | |
| 4003 | // Swift calling convention does not require we copy the sret argument |
| 4004 | // into %rax/%eax for the return. We don't set SRetReturnReg for Swift. |
| 4005 | if (CallConv == CallingConv::Swift || CallConv == CallingConv::SwiftTail) |
| 4006 | continue; |
| 4007 | |
| 4008 | // All x86 ABIs require that for returning structs by value we copy the |
| 4009 | // sret argument into %rax/%eax (depending on ABI) for the return. Save |
| 4010 | // the argument into a virtual register so that we can access it from the |
| 4011 | // return points. |
| 4012 | if (Ins[I].Flags.isSRet()) { |
| 4013 | assert(!FuncInfo->getSRetReturnReg() &&(static_cast <bool> (!FuncInfo->getSRetReturnReg() && "SRet return has already been set") ? void (0) : __assert_fail ("!FuncInfo->getSRetReturnReg() && \"SRet return has already been set\"" , "llvm/lib/Target/X86/X86ISelLowering.cpp", 4014, __extension__ __PRETTY_FUNCTION__)) |
| 4014 | "SRet return has already been set")(static_cast <bool> (!FuncInfo->getSRetReturnReg() && "SRet return has already been set") ? void (0) : __assert_fail ("!FuncInfo->getSRetReturnReg() && \"SRet return has already been set\"" , "llvm/lib/Target/X86/X86ISelLowering.cpp", 4014, __extension__ __PRETTY_FUNCTION__)); |
| 4015 | MVT PtrTy = getPointerTy(DAG.getDataLayout()); |
| 4016 | Register Reg = |
| 4017 | MF.getRegInfo().createVirtualRegister(getRegClassFor(PtrTy)); |
| 4018 | FuncInfo->setSRetReturnReg(Reg); |
| 4019 | SDValue Copy = DAG.getCopyToReg(DAG.getEntryNode(), dl, Reg, InVals[I]); |
| 4020 | Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, Copy, Chain); |
| 4021 | break; |
| 4022 | } |
| 4023 | } |
| 4024 | |
| 4025 | unsigned StackSize = CCInfo.getNextStackOffset(); |
| 4026 | // Align stack specially for tail calls. |
| 4027 | if (shouldGuaranteeTCO(CallConv, |
| 4028 | MF.getTarget().Options.GuaranteedTailCallOpt)) |
| 4029 | StackSize = GetAlignedArgumentStackSize(StackSize, DAG); |
| 4030 | |
| 4031 | if (IsVarArg) |
| 4032 | VarArgsLoweringHelper(FuncInfo, dl, DAG, Subtarget, CallConv, CCInfo) |
| 4033 | .lowerVarArgsParameters(Chain, StackSize); |
| 4034 | |
| 4035 | // Some CCs need callee pop. |
| 4036 | if (X86::isCalleePop(CallConv, Is64Bit, IsVarArg, |
| 4037 | MF.getTarget().Options.GuaranteedTailCallOpt)) { |
| 4038 | FuncInfo->setBytesToPopOnReturn(StackSize); // Callee pops everything. |
| 4039 | } else if (CallConv == CallingConv::X86_INTR && Ins.size() == 2) { |
| 4040 | // X86 interrupts must pop the error code (and the alignment padding) if |
| 4041 | // present. |
| 4042 | FuncInfo->setBytesToPopOnReturn(Is64Bit ? 16 : 4); |
| 4043 | } else { |
| 4044 | FuncInfo->setBytesToPopOnReturn(0); // Callee pops nothing. |
| 4045 | // If this is an sret function, the return should pop the hidden pointer. |
| 4046 | if (!canGuaranteeTCO(CallConv) && hasCalleePopSRet(Ins, Subtarget)) |
| 4047 | FuncInfo->setBytesToPopOnReturn(4); |
| 4048 | } |
| 4049 | |
| 4050 | if (!Is64Bit) { |
| 4051 | // RegSaveFrameIndex is X86-64 only. |
| 4052 | FuncInfo->setRegSaveFrameIndex(0xAAAAAAA); |
| 4053 | } |
| 4054 | |
| 4055 | FuncInfo->setArgumentStackSize(StackSize); |
| 4056 | |
| 4057 | if (WinEHFuncInfo *EHInfo = MF.getWinEHFuncInfo()) { |
| 4058 | EHPersonality Personality = classifyEHPersonality(F.getPersonalityFn()); |
| 4059 | if (Personality == EHPersonality::CoreCLR) { |
| 4060 | assert(Is64Bit)(static_cast <bool> (Is64Bit) ? void (0) : __assert_fail ("Is64Bit", "llvm/lib/Target/X86/X86ISelLowering.cpp", 4060, __extension__ __PRETTY_FUNCTION__)); |
| 4061 | // TODO: Add a mechanism to frame lowering that will allow us to indicate |
| 4062 | // that we'd prefer this slot be allocated towards the bottom of the frame |
| 4063 | // (i.e. near the stack pointer after allocating the frame). Every |
| 4064 | // funclet needs a copy of this slot in its (mostly empty) frame, and the |
| 4065 | // offset from the bottom of this and each funclet's frame must be the |
| 4066 | // same, so the size of funclets' (mostly empty) frames is dictated by |
| 4067 | // how far this slot is from the bottom (since they allocate just enough |
| 4068 | // space to accommodate holding this slot at the correct offset). |
| 4069 | int PSPSymFI = MFI.CreateStackObject(8, Align(8), /*isSpillSlot=*/false); |
| 4070 | EHInfo->PSPSymFrameIdx = PSPSymFI; |
| 4071 | } |
| 4072 | } |
| 4073 | |
| 4074 | if (CallConv == CallingConv::X86_RegCall || |
| 4075 | F.hasFnAttribute("no_caller_saved_registers")) { |
| 4076 | MachineRegisterInfo &MRI = MF.getRegInfo(); |
| 4077 | for (std::pair<Register, Register> Pair : MRI.liveins()) |
| 4078 | MRI.disableCalleeSavedRegister(Pair.first); |
| 4079 | } |
| 4080 | |
| 4081 | return Chain; |
| 4082 | } |
| 4083 | |
| 4084 | SDValue X86TargetLowering::LowerMemOpCallTo(SDValue Chain, SDValue StackPtr, |
| 4085 | SDValue Arg, const SDLoc &dl, |
| 4086 | SelectionDAG &DAG, |
| 4087 | const CCValAssign &VA, |
| 4088 | ISD::ArgFlagsTy Flags, |
| 4089 | bool isByVal) const { |
| 4090 | unsigned LocMemOffset = VA.getLocMemOffset(); |
| 4091 | SDValue PtrOff = DAG.getIntPtrConstant(LocMemOffset, dl); |
| 4092 | PtrOff = DAG.getNode(ISD::ADD, dl, getPointerTy(DAG.getDataLayout()), |
| 4093 | StackPtr, PtrOff); |
| 4094 | if (isByVal) |
| 4095 | return CreateCopyOfByValArgument(Arg, PtrOff, Chain, Flags, DAG, dl); |
| 4096 | |
| 4097 | MaybeAlign Alignment; |
| 4098 | if (Subtarget.isTargetWindowsMSVC() && !Subtarget.is64Bit() && |
| 4099 | Arg.getSimpleValueType() != MVT::f80) |
| 4100 | Alignment = MaybeAlign(4); |
| 4101 | return DAG.getStore( |
| 4102 | Chain, dl, Arg, PtrOff, |
| 4103 | MachinePointerInfo::getStack(DAG.getMachineFunction(), LocMemOffset), |
| 4104 | Alignment); |
| 4105 | } |
| 4106 | |
| 4107 | /// Emit a load of return address if tail call |
| 4108 | /// optimization is performed and it is required. |
| 4109 | SDValue X86TargetLowering::EmitTailCallLoadRetAddr( |
| 4110 | SelectionDAG &DAG, SDValue &OutRetAddr, SDValue Chain, bool IsTailCall, |
| 4111 | bool Is64Bit, int FPDiff, const SDLoc &dl) const { |
| 4112 | // Adjust the Return address stack slot. |
| 4113 | EVT VT = getPointerTy(DAG.getDataLayout()); |
| 4114 | OutRetAddr = getReturnAddressFrameIndex(DAG); |
| 4115 | |
| 4116 | // Load the "old" Return address. |
| 4117 | OutRetAddr = DAG.getLoad(VT, dl, Chain, OutRetAddr, MachinePointerInfo()); |
| 4118 | return SDValue(OutRetAddr.getNode(), 1); |
| 4119 | } |
| 4120 | |
| 4121 | /// Emit a store of the return address if tail call |
| 4122 | /// optimization is performed and it is required (FPDiff!=0). |
| 4123 | static SDValue EmitTailCallStoreRetAddr(SelectionDAG &DAG, MachineFunction &MF, |
| 4124 | SDValue Chain, SDValue RetAddrFrIdx, |
| 4125 | EVT PtrVT, unsigned SlotSize, |
| 4126 | int FPDiff, const SDLoc &dl) { |
| 4127 | // Store the return address to the appropriate stack slot. |
| 4128 | if (!FPDiff) return Chain; |
| 4129 | // Calculate the new stack slot for the return address. |
| 4130 | int NewReturnAddrFI = |
| 4131 | MF.getFrameInfo().CreateFixedObject(SlotSize, (int64_t)FPDiff - SlotSize, |
| 4132 | false); |
| 4133 | SDValue NewRetAddrFrIdx = DAG.getFrameIndex(NewReturnAddrFI, PtrVT); |
| 4134 | Chain = DAG.getStore(Chain, dl, RetAddrFrIdx, NewRetAddrFrIdx, |
| 4135 | MachinePointerInfo::getFixedStack( |
| 4136 | DAG.getMachineFunction(), NewReturnAddrFI)); |
| 4137 | return Chain; |
| 4138 | } |
| 4139 | |
| 4140 | /// Returns a vector_shuffle mask for an movs{s|d}, movd |
| 4141 | /// operation of specified width. |
| 4142 | static SDValue getMOVL(SelectionDAG &DAG, const SDLoc &dl, MVT VT, SDValue V1, |
| 4143 | SDValue V2) { |
| 4144 | unsigned NumElems = VT.getVectorNumElements(); |
| 4145 | SmallVector<int, 8> Mask; |
| 4146 | Mask.push_back(NumElems); |
| 4147 | for (unsigned i = 1; i != NumElems; ++i) |
| 4148 | Mask.push_back(i); |
| 4149 | return DAG.getVectorShuffle(VT, dl, V1, V2, Mask); |
| 4150 | } |
| 4151 | |
| 4152 | SDValue |
| 4153 | X86TargetLowering::LowerCall(TargetLowering::CallLoweringInfo &CLI, |
| 4154 | SmallVectorImpl<SDValue> &InVals) const { |
| 4155 | SelectionDAG &DAG = CLI.DAG; |
| 4156 | SDLoc &dl = CLI.DL; |
| 4157 | SmallVectorImpl<ISD::OutputArg> &Outs = CLI.Outs; |
| 4158 | SmallVectorImpl<SDValue> &OutVals = CLI.OutVals; |
| 4159 | SmallVectorImpl<ISD::InputArg> &Ins = CLI.Ins; |
| 4160 | SDValue Chain = CLI.Chain; |
| 4161 | SDValue Callee = CLI.Callee; |
| 4162 | CallingConv::ID CallConv = CLI.CallConv; |
| 4163 | bool &isTailCall = CLI.IsTailCall; |
| 4164 | bool isVarArg = CLI.IsVarArg; |
| 4165 | const auto *CB = CLI.CB; |
| 4166 | |
| 4167 | MachineFunction &MF = DAG.getMachineFunction(); |
| 4168 | bool Is64Bit = Subtarget.is64Bit(); |
| 4169 | bool IsWin64 = Subtarget.isCallingConvWin64(CallConv); |
| 4170 | bool IsSibcall = false; |
| 4171 | bool IsGuaranteeTCO = MF.getTarget().Options.GuaranteedTailCallOpt || |
| 4172 | CallConv == CallingConv::Tail || CallConv == CallingConv::SwiftTail; |
| 4173 | bool IsCalleePopSRet = !IsGuaranteeTCO && hasCalleePopSRet(Outs, Subtarget); |
| 4174 | X86MachineFunctionInfo *X86Info = MF.getInfo<X86MachineFunctionInfo>(); |
| 4175 | bool HasNCSR = (CB && isa<CallInst>(CB) && |
| 4176 | CB->hasFnAttr("no_caller_saved_registers")); |
| 4177 | bool HasNoCfCheck = (CB && CB->doesNoCfCheck()); |
| 4178 | bool IsIndirectCall = (CB && isa<CallInst>(CB) && CB->isIndirectCall()); |
| 4179 | const Module *M = MF.getMMI().getModule(); |
| 4180 | Metadata *IsCFProtectionSupported = M->getModuleFlag("cf-protection-branch"); |
| 4181 | |
| 4182 | MachineFunction::CallSiteInfo CSInfo; |
| 4183 | if (CallConv == CallingConv::X86_INTR) |
| 4184 | report_fatal_error("X86 interrupts may not be called directly"); |
| 4185 | |
| 4186 | bool IsMustTail = CLI.CB && CLI.CB->isMustTailCall(); |
| 4187 | if (Subtarget.isPICStyleGOT() && !IsGuaranteeTCO && !IsMustTail) { |
| 4188 | // If we are using a GOT, disable tail calls to external symbols with |
| 4189 | // default visibility. Tail calling such a symbol requires using a GOT |
| 4190 | // relocation, which forces early binding of the symbol. This breaks code |
| 4191 | // that require lazy function symbol resolution. Using musttail or |
| 4192 | // GuaranteedTailCallOpt will override this. |
| 4193 | GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee); |
| 4194 | if (!G || (!G->getGlobal()->hasLocalLinkage() && |
| 4195 | G->getGlobal()->hasDefaultVisibility())) |
| 4196 | isTailCall = false; |
| 4197 | } |
| 4198 | |
| 4199 | if (isTailCall && !IsMustTail) { |
| 4200 | // Check if it's really possible to do a tail call. |
| 4201 | isTailCall = IsEligibleForTailCallOptimization( |
| 4202 | Callee, CallConv, IsCalleePopSRet, isVarArg, CLI.RetTy, Outs, OutVals, |
| 4203 | Ins, DAG); |
| 4204 | |
| 4205 | // Sibcalls are automatically detected tailcalls which do not require |
| 4206 | // ABI changes. |
| 4207 | if (!IsGuaranteeTCO && isTailCall) |
| 4208 | IsSibcall = true; |
| 4209 | |
| 4210 | if (isTailCall) |
| 4211 | ++NumTailCalls; |
| 4212 | } |
| 4213 | |
| 4214 | if (IsMustTail && !isTailCall) |
| 4215 | report_fatal_error("failed to perform tail call elimination on a call " |
| 4216 | "site marked musttail"); |
| 4217 | |
| 4218 | assert(!(isVarArg && canGuaranteeTCO(CallConv)) &&(static_cast <bool> (!(isVarArg && canGuaranteeTCO (CallConv)) && "Var args not supported with calling convention fastcc, ghc or hipe" ) ? void (0) : __assert_fail ("!(isVarArg && canGuaranteeTCO(CallConv)) && \"Var args not supported with calling convention fastcc, ghc or hipe\"" , "llvm/lib/Target/X86/X86ISelLowering.cpp", 4219, __extension__ __PRETTY_FUNCTION__)) |
| 4219 | "Var args not supported with calling convention fastcc, ghc or hipe")(static_cast <bool> (!(isVarArg && canGuaranteeTCO (CallConv)) && "Var args not supported with calling convention fastcc, ghc or hipe" ) ? void (0) : __assert_fail ("!(isVarArg && canGuaranteeTCO(CallConv)) && \"Var args not supported with calling convention fastcc, ghc or hipe\"" , "llvm/lib/Target/X86/X86ISelLowering.cpp", 4219, __extension__ __PRETTY_FUNCTION__)); |
| 4220 | |
| 4221 | // Analyze operands of the call, assigning locations to each operand. |
| 4222 | SmallVector<CCValAssign, 16> ArgLocs; |
| 4223 | CCState CCInfo(CallConv, isVarArg, MF, ArgLocs, *DAG.getContext()); |
| 4224 | |
| 4225 | // Allocate shadow area for Win64. |
| 4226 | if (IsWin64) |
| 4227 | CCInfo.AllocateStack(32, Align(8)); |
| 4228 | |
| 4229 | CCInfo.AnalyzeArguments(Outs, CC_X86); |
| 4230 | |
| 4231 | // In vectorcall calling convention a second pass is required for the HVA |
| 4232 | // types. |
| 4233 | if (CallingConv::X86_VectorCall == CallConv) { |
| 4234 | CCInfo.AnalyzeArgumentsSecondPass(Outs, CC_X86); |
| 4235 | } |
| 4236 | |
| 4237 | // Get a count of how many bytes are to be pushed on the stack. |
| 4238 | unsigned NumBytes = CCInfo.getAlignedCallFrameSize(); |
| 4239 | if (IsSibcall) |
| 4240 | // This is a sibcall. The memory operands are available in caller's |
| 4241 | // own caller's stack. |
| 4242 | NumBytes = 0; |
| 4243 | else if (IsGuaranteeTCO && canGuaranteeTCO(CallConv)) |
| 4244 | NumBytes = GetAlignedArgumentStackSize(NumBytes, DAG); |
| 4245 | |
| 4246 | int FPDiff = 0; |
| 4247 | if (isTailCall && |
| 4248 | shouldGuaranteeTCO(CallConv, |
| 4249 | MF.getTarget().Options.GuaranteedTailCallOpt)) { |
| 4250 | // Lower arguments at fp - stackoffset + fpdiff. |
| 4251 | unsigned NumBytesCallerPushed = X86Info->getBytesToPopOnReturn(); |
| 4252 | |
| 4253 | FPDiff = NumBytesCallerPushed - NumBytes; |
| 4254 | |
| 4255 | // Set the delta of movement of the returnaddr stackslot. |
| 4256 | // But only set if delta is greater than previous delta. |
| 4257 | if (FPDiff < X86Info->getTCReturnAddrDelta()) |
| 4258 | X86Info->setTCReturnAddrDelta(FPDiff); |
| 4259 | } |
| 4260 | |
| 4261 | unsigned NumBytesToPush = NumBytes; |
| 4262 | unsigned NumBytesToPop = NumBytes; |
| 4263 | |
| 4264 | // If we have an inalloca argument, all stack space has already been allocated |
| 4265 | // for us and be right at the top of the stack. We don't support multiple |
| 4266 | // arguments passed in memory when using inalloca. |
| 4267 | if (!Outs.empty() && Outs.back().Flags.isInAlloca()) { |
| 4268 | NumBytesToPush = 0; |
| 4269 | if (!ArgLocs.back().isMemLoc()) |
| 4270 | report_fatal_error("cannot use inalloca attribute on a register " |
| 4271 | "parameter"); |
| 4272 | if (ArgLocs.back().getLocMemOffset() != 0) |
| 4273 | report_fatal_error("any parameter with the inalloca attribute must be " |
| 4274 | "the only memory argument"); |
| 4275 | } else if (CLI.IsPreallocated) { |
| 4276 | assert(ArgLocs.back().isMemLoc() &&(static_cast <bool> (ArgLocs.back().isMemLoc() && "cannot use preallocated attribute on a register " "parameter" ) ? void (0) : __assert_fail ("ArgLocs.back().isMemLoc() && \"cannot use preallocated attribute on a register \" \"parameter\"" , "llvm/lib/Target/X86/X86ISelLowering.cpp", 4278, __extension__ __PRETTY_FUNCTION__)) |
| 4277 | "cannot use preallocated attribute on a register "(static_cast <bool> (ArgLocs.back().isMemLoc() && "cannot use preallocated attribute on a register " "parameter" ) ? void (0) : __assert_fail ("ArgLocs.back().isMemLoc() && \"cannot use preallocated attribute on a register \" \"parameter\"" , "llvm/lib/Target/X86/X86ISelLowering.cpp", 4278, __extension__ __PRETTY_FUNCTION__)) |
| 4278 | "parameter")(static_cast <bool> (ArgLocs.back().isMemLoc() && "cannot use preallocated attribute on a register " "parameter" ) ? void (0) : __assert_fail ("ArgLocs.back().isMemLoc() && \"cannot use preallocated attribute on a register \" \"parameter\"" , "llvm/lib/Target/X86/X86ISelLowering.cpp", 4278, __extension__ __PRETTY_FUNCTION__)); |
| 4279 | SmallVector<size_t, 4> PreallocatedOffsets; |
| 4280 | for (size_t i = 0; i < CLI.OutVals.size(); ++i) { |
| 4281 | if (CLI.CB->paramHasAttr(i, Attribute::Preallocated)) { |
| 4282 | PreallocatedOffsets.push_back(ArgLocs[i].getLocMemOffset()); |
| 4283 | } |
| 4284 | } |
| 4285 | auto *MFI = DAG.getMachineFunction().getInfo<X86MachineFunctionInfo>(); |
| 4286 | size_t PreallocatedId = MFI->getPreallocatedIdForCallSite(CLI.CB); |
| 4287 | MFI->setPreallocatedStackSize(PreallocatedId, NumBytes); |
| 4288 | MFI->setPreallocatedArgOffsets(PreallocatedId, PreallocatedOffsets); |
| 4289 | NumBytesToPush = 0; |
| 4290 | } |
| 4291 | |
| 4292 | if (!IsSibcall && !IsMustTail) |
| 4293 | Chain = DAG.getCALLSEQ_START(Chain, NumBytesToPush, |
| 4294 | NumBytes - NumBytesToPush, dl); |
| 4295 | |
| 4296 | SDValue RetAddrFrIdx; |
| 4297 | // Load return address for tail calls. |
| 4298 | if (isTailCall && FPDiff) |
| 4299 | Chain = EmitTailCallLoadRetAddr(DAG, RetAddrFrIdx, Chain, isTailCall, |
| 4300 | Is64Bit, FPDiff, dl); |
| 4301 | |
| 4302 | SmallVector<std::pair<Register, SDValue>, 8> RegsToPass; |
| 4303 | SmallVector<SDValue, 8> MemOpChains; |
| 4304 | SDValue StackPtr; |
| 4305 | |
| 4306 | // The next loop assumes that the locations are in the same order of the |
| 4307 | // input arguments. |
| 4308 | assert(isSortedByValueNo(ArgLocs) &&(static_cast <bool> (isSortedByValueNo(ArgLocs) && "Argument Location list must be sorted before lowering") ? void (0) : __assert_fail ("isSortedByValueNo(ArgLocs) && \"Argument Location list must be sorted before lowering\"" , "llvm/lib/Target/X86/X86ISelLowering.cpp", 4309, __extension__ __PRETTY_FUNCTION__)) |
| 4309 | "Argument Location list must be sorted before lowering")(static_cast <bool> (isSortedByValueNo(ArgLocs) && "Argument Location list must be sorted before lowering") ? void (0) : __assert_fail ("isSortedByValueNo(ArgLocs) && \"Argument Location list must be sorted before lowering\"" , "llvm/lib/Target/X86/X86ISelLowering.cpp", 4309, __extension__ __PRETTY_FUNCTION__)); |
| 4310 | |
| 4311 | // Walk the register/memloc assignments, inserting copies/loads. In the case |
| 4312 | // of tail call optimization arguments are handle later. |
| 4313 | const X86RegisterInfo *RegInfo = Subtarget.getRegisterInfo(); |
| 4314 | for (unsigned I = 0, OutIndex = 0, E = ArgLocs.size(); I != E; |
| 4315 | ++I, ++OutIndex) { |
| 4316 | assert(OutIndex < Outs.size() && "Invalid Out index")(static_cast <bool> (OutIndex < Outs.size() && "Invalid Out index") ? void (0) : __assert_fail ("OutIndex < Outs.size() && \"Invalid Out index\"" , "llvm/lib/Target/X86/X86ISelLowering.cpp", 4316, __extension__ __PRETTY_FUNCTION__)); |
| 4317 | // Skip inalloca/preallocated arguments, they have already been written. |
| 4318 | ISD::ArgFlagsTy Flags = Outs[OutIndex].Flags; |
| 4319 | if (Flags.isInAlloca() || Flags.isPreallocated()) |
| 4320 | continue; |
| 4321 | |
| 4322 | CCValAssign &VA = ArgLocs[I]; |
| 4323 | EVT RegVT = VA.getLocVT(); |
| 4324 | SDValue Arg = OutVals[OutIndex]; |
| 4325 | bool isByVal = Flags.isByVal(); |
| 4326 | |
| 4327 | // Promote the value if needed. |
| 4328 | switch (VA.getLocInfo()) { |
| 4329 | default: llvm_unreachable("Unknown loc info!")::llvm::llvm_unreachable_internal("Unknown loc info!", "llvm/lib/Target/X86/X86ISelLowering.cpp" , 4329); |
| 4330 | case CCValAssign::Full: break; |
| 4331 | case CCValAssign::SExt: |
| 4332 | Arg = DAG.getNode(ISD::SIGN_EXTEND, dl, RegVT, Arg); |
| 4333 | break; |
| 4334 | case CCValAssign::ZExt: |
| 4335 | Arg = DAG.getNode(ISD::ZERO_EXTEND, dl, RegVT, Arg); |
| 4336 | break; |
| 4337 | case CCValAssign::AExt: |
| 4338 | if (Arg.getValueType().isVector() && |
| 4339 | Arg.getValueType().getVectorElementType() == MVT::i1) |
| 4340 | Arg = lowerMasksToReg(Arg, RegVT, dl, DAG); |
| 4341 | else if (RegVT.is128BitVector()) { |
| 4342 | // Special case: passing MMX values in XMM registers. |
| 4343 | Arg = DAG.getBitcast(MVT::i64, Arg); |
| 4344 | Arg = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v2i64, Arg); |
| 4345 | Arg = getMOVL(DAG, dl, MVT::v2i64, DAG.getUNDEF(MVT::v2i64), Arg); |
| 4346 | } else |
| 4347 | Arg = DAG.getNode(ISD::ANY_EXTEND, dl, RegVT, Arg); |
| 4348 | break; |
| 4349 | case CCValAssign::BCvt: |
| 4350 | Arg = DAG.getBitcast(RegVT, Arg); |
| 4351 | break; |
| 4352 | case CCValAssign::Indirect: { |
| 4353 | if (isByVal) { |
| 4354 | // Memcpy the argument to a temporary stack slot to prevent |
| 4355 | // the caller from seeing any modifications the callee may make |
| 4356 | // as guaranteed by the `byval` attribute. |
| 4357 | int FrameIdx = MF.getFrameInfo().CreateStackObject( |
| 4358 | Flags.getByValSize(), |
| 4359 | std::max(Align(16), Flags.getNonZeroByValAlign()), false); |
| 4360 | SDValue StackSlot = |
| 4361 | DAG.getFrameIndex(FrameIdx, getPointerTy(DAG.getDataLayout())); |
| 4362 | Chain = |
| 4363 | CreateCopyOfByValArgument(Arg, StackSlot, Chain, Flags, DAG, dl); |
| 4364 | // From now on treat this as a regular pointer |
| 4365 | Arg = StackSlot; |
| 4366 | isByVal = false; |
| 4367 | } else { |
| 4368 | // Store the argument. |
| 4369 | SDValue SpillSlot = DAG.CreateStackTemporary(VA.getValVT()); |
| 4370 | int FI = cast<FrameIndexSDNode>(SpillSlot)->getIndex(); |
| 4371 | Chain = DAG.getStore( |
| 4372 | Chain, dl, Arg, SpillSlot, |
| 4373 | MachinePointerInfo::getFixedStack(DAG.getMachineFunction(), FI)); |
| 4374 | Arg = SpillSlot; |
| 4375 | } |
| 4376 | break; |
| 4377 | } |
| 4378 | } |
| 4379 | |
| 4380 | if (VA.needsCustom()) { |
| 4381 | assert(VA.getValVT() == MVT::v64i1 &&(static_cast <bool> (VA.getValVT() == MVT::v64i1 && "Currently the only custom case is when we split v64i1 to 2 regs" ) ? void (0) : __assert_fail ("VA.getValVT() == MVT::v64i1 && \"Currently the only custom case is when we split v64i1 to 2 regs\"" , "llvm/lib/Target/X86/X86ISelLowering.cpp", 4382, __extension__ __PRETTY_FUNCTION__)) |
| 4382 | "Currently the only custom case is when we split v64i1 to 2 regs")(static_cast <bool> (VA.getValVT() == MVT::v64i1 && "Currently the only custom case is when we split v64i1 to 2 regs" ) ? void (0) : __assert_fail ("VA.getValVT() == MVT::v64i1 && \"Currently the only custom case is when we split v64i1 to 2 regs\"" , "llvm/lib/Target/X86/X86ISelLowering.cpp", 4382, __extension__ __PRETTY_FUNCTION__)); |
| 4383 | // Split v64i1 value into two registers |
| 4384 | Passv64i1ArgInRegs(dl, DAG, Arg, RegsToPass, VA, ArgLocs[++I], Subtarget); |
| 4385 | } else if (VA.isRegLoc()) { |
| 4386 | RegsToPass.push_back(std::make_pair(VA.getLocReg(), Arg)); |
| 4387 | const TargetOptions &Options = DAG.getTarget().Options; |
| 4388 | if (Options.EmitCallSiteInfo) |
| 4389 | CSInfo.emplace_back(VA.getLocReg(), I); |
| 4390 | if (isVarArg && IsWin64) { |
| 4391 | // Win64 ABI requires argument XMM reg to be copied to the corresponding |
| 4392 | // shadow reg if callee is a varargs function. |
| 4393 | Register ShadowReg; |
| 4394 | switch (VA.getLocReg()) { |
| 4395 | case X86::XMM0: ShadowReg = X86::RCX; break; |
| 4396 | case X86::XMM1: ShadowReg = X86::RDX; break; |
| 4397 | case X86::XMM2: ShadowReg = X86::R8; break; |
| 4398 | case X86::XMM3: ShadowReg = X86::R9; break; |
| 4399 | } |
| 4400 | if (ShadowReg) |
| 4401 | RegsToPass.push_back(std::make_pair(ShadowReg, Arg)); |
| 4402 | } |
| 4403 | } else if (!IsSibcall && (!isTailCall || isByVal)) { |
| 4404 | assert(VA.isMemLoc())(static_cast <bool> (VA.isMemLoc()) ? void (0) : __assert_fail ("VA.isMemLoc()", "llvm/lib/Target/X86/X86ISelLowering.cpp", 4404, __extension__ __PRETTY_FUNCTION__)); |
| 4405 | if (!StackPtr.getNode()) |
| 4406 | StackPtr = DAG.getCopyFromReg(Chain, dl, RegInfo->getStackRegister(), |
| 4407 | getPointerTy(DAG.getDataLayout())); |
| 4408 | MemOpChains.push_back(LowerMemOpCallTo(Chain, StackPtr, Arg, |
| 4409 | dl, DAG, VA, Flags, isByVal)); |
| 4410 | } |
| 4411 | } |
| 4412 | |
| 4413 | if (!MemOpChains.empty()) |
| 4414 | Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, MemOpChains); |
| 4415 | |
| 4416 | if (Subtarget.isPICStyleGOT()) { |
| 4417 | // ELF / PIC requires GOT in the EBX register before function calls via PLT |
| 4418 | // GOT pointer (except regcall). |
| 4419 | if (!isTailCall) { |
| 4420 | // Indirect call with RegCall calling convertion may use up all the |
| 4421 | // general registers, so it is not suitable to bind EBX reister for |
| 4422 | // GOT address, just let register allocator handle it. |
| 4423 | if (CallConv != CallingConv::X86_RegCall) |
| 4424 | RegsToPass.push_back(std::make_pair( |
| 4425 | Register(X86::EBX), DAG.getNode(X86ISD::GlobalBaseReg, SDLoc(), |
| 4426 | getPointerTy(DAG.getDataLayout())))); |
| 4427 | } else { |
| 4428 | // If we are tail calling and generating PIC/GOT style code load the |
| 4429 | // address of the callee into ECX. The value in ecx is used as target of |
| 4430 | // the tail jump. This is done to circumvent the ebx/callee-saved problem |
| 4431 | // for tail calls on PIC/GOT architectures. Normally we would just put the |
| 4432 | // address of GOT into ebx and then call target@PLT. But for tail calls |
| 4433 | // ebx would be restored (since ebx is callee saved) before jumping to the |
| 4434 | // target@PLT. |
| 4435 | |
| 4436 | // Note: The actual moving to ECX is done further down. |
| 4437 | GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee); |
| 4438 | if (G && !G->getGlobal()->hasLocalLinkage() && |
| 4439 | G->getGlobal()->hasDefaultVisibility()) |
| 4440 | Callee = LowerGlobalAddress(Callee, DAG); |
| 4441 | else if (isa<ExternalSymbolSDNode>(Callee)) |
| 4442 | Callee = LowerExternalSymbol(Callee, DAG); |
| 4443 | } |
| 4444 | } |
| 4445 | |
| 4446 | if (Is64Bit && isVarArg && !IsWin64 && !IsMustTail && |
| 4447 | (Subtarget.hasSSE1() || !M->getModuleFlag("SkipRaxSetup"))) { |
| 4448 | // From AMD64 ABI document: |
| 4449 | // For calls that may call functions that use varargs or stdargs |
| 4450 | // (prototype-less calls or calls to functions containing ellipsis (...) in |
| 4451 | // the declaration) %al is used as hidden argument to specify the number |
| 4452 | // of SSE registers used. The contents of %al do not need to match exactly |
| 4453 | // the number of registers, but must be an ubound on the number of SSE |
| 4454 | // registers used and is in the range 0 - 8 inclusive. |
| 4455 | |
| 4456 | // Count the number of XMM registers allocated. |
| 4457 | static const MCPhysReg XMMArgRegs[] = { |
| 4458 | X86::XMM0, X86::XMM1, X86::XMM2, X86::XMM3, |
| 4459 | X86::XMM4, X86::XMM5, X86::XMM6, X86::XMM7 |
| 4460 | }; |
| 4461 | unsigned NumXMMRegs = CCInfo.getFirstUnallocated(XMMArgRegs); |
| 4462 | assert((Subtarget.hasSSE1() || !NumXMMRegs)(static_cast <bool> ((Subtarget.hasSSE1() || !NumXMMRegs ) && "SSE registers cannot be used when SSE is disabled" ) ? void (0) : __assert_fail ("(Subtarget.hasSSE1() || !NumXMMRegs) && \"SSE registers cannot be used when SSE is disabled\"" , "llvm/lib/Target/X86/X86ISelLowering.cpp", 4463, __extension__ __PRETTY_FUNCTION__)) |
| 4463 | && "SSE registers cannot be used when SSE is disabled")(static_cast <bool> ((Subtarget.hasSSE1() || !NumXMMRegs ) && "SSE registers cannot be used when SSE is disabled" ) ? void (0) : __assert_fail ("(Subtarget.hasSSE1() || !NumXMMRegs) && \"SSE registers cannot be used when SSE is disabled\"" , "llvm/lib/Target/X86/X86ISelLowering.cpp", 4463, __extension__ __PRETTY_FUNCTION__)); |
| 4464 | RegsToPass.push_back(std::make_pair(Register(X86::AL), |
| 4465 | DAG.getConstant(NumXMMRegs, dl, |
| 4466 | MVT::i8))); |
| 4467 | } |
| 4468 | |
| 4469 | if (isVarArg && IsMustTail) { |
| 4470 | const auto &Forwards = X86Info->getForwardedMustTailRegParms(); |
| 4471 | for (const auto &F : Forwards) { |
| 4472 | SDValue Val = DAG.getCopyFromReg(Chain, dl, F.VReg, F.VT); |
| 4473 | RegsToPass.push_back(std::make_pair(F.PReg, Val)); |
| 4474 | } |
| 4475 | } |
| 4476 | |
| 4477 | // For tail calls lower the arguments to the 'real' stack slots. Sibcalls |
| 4478 | // don't need this because the eligibility check rejects calls that require |
| 4479 | // shuffling arguments passed in memory. |
| 4480 | if (!IsSibcall && isTailCall) { |
| 4481 | // Force all the incoming stack arguments to be loaded from the stack |
| 4482 | // before any new outgoing arguments are stored to the stack, because the |
| 4483 | // outgoing stack slots may alias the incoming argument stack slots, and |
| 4484 | // the alias isn't otherwise explicit. This is slightly more conservative |
| 4485 | // than necessary, because it means that each store effectively depends |
| 4486 | // on every argument instead of just those arguments it would clobber. |
| 4487 | SDValue ArgChain = DAG.getStackArgumentTokenFactor(Chain); |
| 4488 | |
| 4489 | SmallVector<SDValue, 8> MemOpChains2; |
| 4490 | SDValue FIN; |
| 4491 | int FI = 0; |
| 4492 | for (unsigned I = 0, OutsIndex = 0, E = ArgLocs.size(); I != E; |
| 4493 | ++I, ++OutsIndex) { |
| 4494 | CCValAssign &VA = ArgLocs[I]; |
| 4495 | |
| 4496 | if (VA.isRegLoc()) { |
| 4497 | if (VA.needsCustom()) { |
| 4498 | assert((CallConv == CallingConv::X86_RegCall) &&(static_cast <bool> ((CallConv == CallingConv::X86_RegCall ) && "Expecting custom case only in regcall calling convention" ) ? void (0) : __assert_fail ("(CallConv == CallingConv::X86_RegCall) && \"Expecting custom case only in regcall calling convention\"" , "llvm/lib/Target/X86/X86ISelLowering.cpp", 4499, __extension__ __PRETTY_FUNCTION__)) |
| 4499 | "Expecting custom case only in regcall calling convention")(static_cast <bool> ((CallConv == CallingConv::X86_RegCall ) && "Expecting custom case only in regcall calling convention" ) ? void (0) : __assert_fail ("(CallConv == CallingConv::X86_RegCall) && \"Expecting custom case only in regcall calling convention\"" , "llvm/lib/Target/X86/X86ISelLowering.cpp", 4499, __extension__ __PRETTY_FUNCTION__)); |
| 4500 | // This means that we are in special case where one argument was |
| 4501 | // passed through two register locations - Skip the next location |
| 4502 | ++I; |
| 4503 | } |
| 4504 | |
| 4505 | continue; |
| 4506 | } |
| 4507 | |
| 4508 | assert(VA.isMemLoc())(static_cast <bool> (VA.isMemLoc()) ? void (0) : __assert_fail ("VA.isMemLoc()", "llvm/lib/Target/X86/X86ISelLowering.cpp", 4508, __extension__ __PRETTY_FUNCTION__)); |
| 4509 | SDValue Arg = OutVals[OutsIndex]; |
| 4510 | ISD::ArgFlagsTy Flags = Outs[OutsIndex].Flags; |
| 4511 | // Skip inalloca/preallocated arguments. They don't require any work. |
| 4512 | if (Flags.isInAlloca() || Flags.isPreallocated()) |
| 4513 | continue; |
| 4514 | // Create frame index. |
| 4515 | int32_t Offset = VA.getLocMemOffset()+FPDiff; |
| 4516 | uint32_t OpSize = (VA.getLocVT().getSizeInBits()+7)/8; |
| 4517 | FI = MF.getFrameInfo().CreateFixedObject(OpSize, Offset, true); |
| 4518 | FIN = DAG.getFrameIndex(FI, getPointerTy(DAG.getDataLayout())); |
| 4519 | |
| 4520 | if (Flags.isByVal()) { |
| 4521 | // Copy relative to framepointer. |
| 4522 | SDValue Source = DAG.getIntPtrConstant(VA.getLocMemOffset(), dl); |
| 4523 | if (!StackPtr.getNode()) |
| 4524 | StackPtr = DAG.getCopyFromReg(Chain, dl, RegInfo->getStackRegister(), |
| 4525 | getPointerTy(DAG.getDataLayout())); |
| 4526 | Source = DAG.getNode(ISD::ADD, dl, getPointerTy(DAG.getDataLayout()), |
| 4527 | StackPtr, Source); |
| 4528 | |
| 4529 | MemOpChains2.push_back(CreateCopyOfByValArgument(Source, FIN, |
| 4530 | ArgChain, |
| 4531 | Flags, DAG, dl)); |
| 4532 | } else { |
| 4533 | // Store relative to framepointer. |
| 4534 | MemOpChains2.push_back(DAG.getStore( |
| 4535 | ArgChain, dl, Arg, FIN, |
| 4536 | MachinePointerInfo::getFixedStack(DAG.getMachineFunction(), FI))); |
| 4537 | } |
| 4538 | } |
| 4539 | |
| 4540 | if (!MemOpChains2.empty()) |
| 4541 | Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, MemOpChains2); |
| 4542 | |
| 4543 | // Store the return address to the appropriate stack slot. |
| 4544 | Chain = EmitTailCallStoreRetAddr(DAG, MF, Chain, RetAddrFrIdx, |
| 4545 | getPointerTy(DAG.getDataLayout()), |
| 4546 | RegInfo->getSlotSize(), FPDiff, dl); |
| 4547 | } |
| 4548 | |
| 4549 | // Build a sequence of copy-to-reg nodes chained together with token chain |
| 4550 | // and flag operands which copy the outgoing args into registers. |
| 4551 | SDValue InFlag; |
| 4552 | for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i) { |
| 4553 | Chain = DAG.getCopyToReg(Chain, dl, RegsToPass[i].first, |
| 4554 | RegsToPass[i].second, InFlag); |
| 4555 | InFlag = Chain.getValue(1); |
| 4556 | } |
| 4557 | |
| 4558 | if (DAG.getTarget().getCodeModel() == CodeModel::Large) { |
| 4559 | assert(Is64Bit && "Large code model is only legal in 64-bit mode.")(static_cast <bool> (Is64Bit && "Large code model is only legal in 64-bit mode." ) ? void (0) : __assert_fail ("Is64Bit && \"Large code model is only legal in 64-bit mode.\"" , "llvm/lib/Target/X86/X86ISelLowering.cpp", 4559, __extension__ __PRETTY_FUNCTION__)); |
| 4560 | // In the 64-bit large code model, we have to make all calls |
| 4561 | // through a register, since the call instruction's 32-bit |
| 4562 | // pc-relative offset may not be large enough to hold the whole |
| 4563 | // address. |
| 4564 | } else if (Callee->getOpcode() == ISD::GlobalAddress || |
| 4565 | Callee->getOpcode() == ISD::ExternalSymbol) { |
| 4566 | // Lower direct calls to global addresses and external symbols. Setting |
| 4567 | // ForCall to true here has the effect of removing WrapperRIP when possible |
| 4568 | // to allow direct calls to be selected without first materializing the |
| 4569 | // address into a register. |
| 4570 | Callee = LowerGlobalOrExternal(Callee, DAG, /*ForCall=*/true); |
| 4571 | } else if (Subtarget.isTarget64BitILP32() && |
| 4572 | Callee.getValueType() == MVT::i32) { |
| 4573 | // Zero-extend the 32-bit Callee address into a 64-bit according to x32 ABI |
| 4574 | Callee = DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::i64, Callee); |
| 4575 | } |
| 4576 | |
| 4577 | // Returns a chain & a flag for retval copy to use. |
| 4578 | SDVTList NodeTys = DAG.getVTList(MVT::Other, MVT::Glue); |
| 4579 | SmallVector<SDValue, 8> Ops; |
| 4580 | |
| 4581 | if (!IsSibcall && isTailCall && !IsMustTail) { |
| 4582 | Chain = DAG.getCALLSEQ_END(Chain, |
| 4583 | DAG.getIntPtrConstant(NumBytesToPop, dl, true), |
| 4584 | DAG.getIntPtrConstant(0, dl, true), InFlag, dl); |
| 4585 | InFlag = Chain.getValue(1); |
| 4586 | } |
| 4587 | |
| 4588 | Ops.push_back(Chain); |
| 4589 | Ops.push_back(Callee); |
| 4590 | |
| 4591 | if (isTailCall) |
| 4592 | Ops.push_back(DAG.getTargetConstant(FPDiff, dl, MVT::i32)); |
| 4593 | |
| 4594 | // Add argument registers to the end of the list so that they are known live |
| 4595 | // into the call. |
| 4596 | for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i) |
| 4597 | Ops.push_back(DAG.getRegister(RegsToPass[i].first, |
| 4598 | RegsToPass[i].second.getValueType())); |
| 4599 | |
| 4600 | // Add a register mask operand representing the call-preserved registers. |
| 4601 | const uint32_t *Mask = [&]() { |
| 4602 | auto AdaptedCC = CallConv; |
| 4603 | // If HasNCSR is asserted (attribute NoCallerSavedRegisters exists), |
| 4604 | // use X86_INTR calling convention because it has the same CSR mask |
| 4605 | // (same preserved registers). |
| 4606 | if (HasNCSR) |
| 4607 | AdaptedCC = (CallingConv::ID)CallingConv::X86_INTR; |
| 4608 | // If NoCalleeSavedRegisters is requested, than use GHC since it happens |
| 4609 | // to use the CSR_NoRegs_RegMask. |
| 4610 | if (CB && CB->hasFnAttr("no_callee_saved_registers")) |
| 4611 | AdaptedCC = (CallingConv::ID)CallingConv::GHC; |
| 4612 | return RegInfo->getCallPreservedMask(MF, AdaptedCC); |
| 4613 | }(); |
| 4614 | assert(Mask && "Missing call preserved mask for calling convention")(static_cast <bool> (Mask && "Missing call preserved mask for calling convention" ) ? void (0) : __assert_fail ("Mask && \"Missing call preserved mask for calling convention\"" , "llvm/lib/Target/X86/X86ISelLowering.cpp", 4614, __extension__ __PRETTY_FUNCTION__)); |
| 4615 | |
| 4616 | // If this is an invoke in a 32-bit function using a funclet-based |
| 4617 | // personality, assume the function clobbers all registers. If an exception |
| 4618 | // is thrown, the runtime will not restore CSRs. |
| 4619 | // FIXME: Model this more precisely so that we can register allocate across |
| 4620 | // the normal edge and spill and fill across the exceptional edge. |
| 4621 | if (!Is64Bit && CLI.CB && isa<InvokeInst>(CLI.CB)) { |
| 4622 | const Function &CallerFn = MF.getFunction(); |
| 4623 | EHPersonality Pers = |
| 4624 | CallerFn.hasPersonalityFn() |
| 4625 | ? classifyEHPersonality(CallerFn.getPersonalityFn()) |
| 4626 | : EHPersonality::Unknown; |
| 4627 | if (isFuncletEHPersonality(Pers)) |
| 4628 | Mask = RegInfo->getNoPreservedMask(); |
| 4629 | } |
| 4630 | |
| 4631 | // Define a new register mask from the existing mask. |
| 4632 | uint32_t *RegMask = nullptr; |
| 4633 | |
| 4634 | // In some calling conventions we need to remove the used physical registers |
| 4635 | // from the reg mask. |
| 4636 | if (CallConv == CallingConv::X86_RegCall || HasNCSR) { |
| 4637 | const TargetRegisterInfo *TRI = Subtarget.getRegisterInfo(); |
| 4638 | |
| 4639 | // Allocate a new Reg Mask and copy Mask. |
| 4640 | RegMask = MF.allocateRegMask(); |
| 4641 | unsigned RegMaskSize = MachineOperand::getRegMaskSize(TRI->getNumRegs()); |
| 4642 | memcpy(RegMask, Mask, sizeof(RegMask[0]) * RegMaskSize); |
| 4643 | |
| 4644 | // Make sure all sub registers of the argument registers are reset |
| 4645 | // in the RegMask. |
| 4646 | for (auto const &RegPair : RegsToPass) |
| 4647 | for (MCSubRegIterator SubRegs(RegPair.first, TRI, /*IncludeSelf=*/true); |
| 4648 | SubRegs.isValid(); ++SubRegs) |
| 4649 | RegMask[*SubRegs / 32] &= ~(1u << (*SubRegs % 32)); |
| 4650 | |
| 4651 | // Create the RegMask Operand according to our updated mask. |
| 4652 | Ops.push_back(DAG.getRegisterMask(RegMask)); |
| 4653 | } else { |
| 4654 | // Create the RegMask Operand according to the static mask. |
| 4655 | Ops.push_back(DAG.getRegisterMask(Mask)); |
| 4656 | } |
| 4657 | |
| 4658 | if (InFlag.getNode()) |
| 4659 | Ops.push_back(InFlag); |
| 4660 | |
| 4661 | if (isTailCall) { |
| 4662 | // We used to do: |
| 4663 | //// If this is the first return lowered for this function, add the regs |
| 4664 | //// to the liveout set for the function. |
| 4665 | // This isn't right, although it's probably harmless on x86; liveouts |
| 4666 | // should be computed from returns not tail calls. Consider a void |
| 4667 | // function making a tail call to a function returning int. |
| 4668 | MF.getFrameInfo().setHasTailCall(); |
| 4669 | SDValue Ret = DAG.getNode(X86ISD::TC_RETURN, dl, NodeTys, Ops); |
| 4670 | DAG.addCallSiteInfo(Ret.getNode(), std::move(CSInfo)); |
| 4671 | return Ret; |
| 4672 | } |
| 4673 | |
| 4674 | if (HasNoCfCheck && IsCFProtectionSupported && IsIndirectCall) { |
| 4675 | Chain = DAG.getNode(X86ISD::NT_CALL, dl, NodeTys, Ops); |
| 4676 | } else if (CLI.CB && objcarc::hasAttachedCallOpBundle(CLI.CB)) { |
| 4677 | // Calls with a "clang.arc.attachedcall" bundle are special. They should be |
| 4678 | // expanded to the call, directly followed by a special marker sequence and |
| 4679 | // a call to a ObjC library function. Use the CALL_RVMARKER to do that. |
| 4680 | assert(!isTailCall &&(static_cast <bool> (!isTailCall && "tail calls cannot be marked with clang.arc.attachedcall" ) ? void (0) : __assert_fail ("!isTailCall && \"tail calls cannot be marked with clang.arc.attachedcall\"" , "llvm/lib/Target/X86/X86ISelLowering.cpp", 4681, __extension__ __PRETTY_FUNCTION__)) |
| 4681 | "tail calls cannot be marked with clang.arc.attachedcall")(static_cast <bool> (!isTailCall && "tail calls cannot be marked with clang.arc.attachedcall" ) ? void (0) : __assert_fail ("!isTailCall && \"tail calls cannot be marked with clang.arc.attachedcall\"" , "llvm/lib/Target/X86/X86ISelLowering.cpp", 4681, __extension__ __PRETTY_FUNCTION__)); |
| 4682 | assert(Is64Bit && "clang.arc.attachedcall is only supported in 64bit mode")(static_cast <bool> (Is64Bit && "clang.arc.attachedcall is only supported in 64bit mode" ) ? void (0) : __assert_fail ("Is64Bit && \"clang.arc.attachedcall is only supported in 64bit mode\"" , "llvm/lib/Target/X86/X86ISelLowering.cpp", 4682, __extension__ __PRETTY_FUNCTION__)); |
| 4683 | |
| 4684 | // Add a target global address for the retainRV/claimRV runtime function |
| 4685 | // just before the call target. |
| 4686 | Function *ARCFn = *objcarc::getAttachedARCFunction(CLI.CB); |
| 4687 | auto PtrVT = getPointerTy(DAG.getDataLayout()); |
| 4688 | auto GA = DAG.getTargetGlobalAddress(ARCFn, dl, PtrVT); |
| 4689 | Ops.insert(Ops.begin() + 1, GA); |
| 4690 | Chain = DAG.getNode(X86ISD::CALL_RVMARKER, dl, NodeTys, Ops); |
| 4691 | } else { |
| 4692 | Chain = DAG.getNode(X86ISD::CALL, dl, NodeTys, Ops); |
| 4693 | } |
| 4694 | |
| 4695 | InFlag = Chain.getValue(1); |
| 4696 | DAG.addNoMergeSiteInfo(Chain.getNode(), CLI.NoMerge); |
| 4697 | DAG.addCallSiteInfo(Chain.getNode(), std::move(CSInfo)); |
| 4698 | |
| 4699 | // Save heapallocsite metadata. |
| 4700 | if (CLI.CB) |
| 4701 | if (MDNode *HeapAlloc = CLI.CB->getMetadata("heapallocsite")) |
| 4702 | DAG.addHeapAllocSite(Chain.getNode(), HeapAlloc); |
| 4703 | |
| 4704 | // Create the CALLSEQ_END node. |
| 4705 | unsigned NumBytesForCalleeToPop = 0; // Callee pops nothing. |
| 4706 | if (X86::isCalleePop(CallConv, Is64Bit, isVarArg, |
| 4707 | DAG.getTarget().Options.GuaranteedTailCallOpt)) |
| 4708 | NumBytesForCalleeToPop = NumBytes; // Callee pops everything |
| 4709 | else if (!canGuaranteeTCO(CallConv) && IsCalleePopSRet) |
| 4710 | // If this call passes a struct-return pointer, the callee |
| 4711 | // pops that struct pointer. |
| 4712 | NumBytesForCalleeToPop = 4; |
| 4713 | |
| 4714 | // Returns a flag for retval copy to use. |
| 4715 | if (!IsSibcall) { |
| 4716 | Chain = DAG.getCALLSEQ_END(Chain, |
| 4717 | DAG.getIntPtrConstant(NumBytesToPop, dl, true), |
| 4718 | DAG.getIntPtrConstant(NumBytesForCalleeToPop, dl, |
| 4719 | true), |
| 4720 | InFlag, dl); |
| 4721 | InFlag = Chain.getValue(1); |
| 4722 | } |
| 4723 | |
| 4724 | // Handle result values, copying them out of physregs into vregs that we |
| 4725 | // return. |
| 4726 | return LowerCallResult(Chain, InFlag, CallConv, isVarArg, Ins, dl, DAG, |
| 4727 | InVals, RegMask); |
| 4728 | } |
| 4729 | |
| 4730 | //===----------------------------------------------------------------------===// |
| 4731 | // Fast Calling Convention (tail call) implementation |
| 4732 | //===----------------------------------------------------------------------===// |
| 4733 | |
| 4734 | // Like std call, callee cleans arguments, convention except that ECX is |
| 4735 | // reserved for storing the tail called function address. Only 2 registers are |
| 4736 | // free for argument passing (inreg). Tail call optimization is performed |
| 4737 | // provided: |
| 4738 | // * tailcallopt is enabled |
| 4739 | // * caller/callee are fastcc |
| 4740 | // On X86_64 architecture with GOT-style position independent code only local |
| 4741 | // (within module) calls are supported at the moment. |
| 4742 | // To keep the stack aligned according to platform abi the function |
| 4743 | // GetAlignedArgumentStackSize ensures that argument delta is always multiples |
| 4744 | // of stack alignment. (Dynamic linkers need this - Darwin's dyld for example) |
| 4745 | // If a tail called function callee has more arguments than the caller the |
| 4746 | // caller needs to make sure that there is room to move the RETADDR to. This is |
| 4747 | // achieved by reserving an area the size of the argument delta right after the |
| 4748 | // original RETADDR, but before the saved framepointer or the spilled registers |
| 4749 | // e.g. caller(arg1, arg2) calls callee(arg1, arg2,arg3,arg4) |
| 4750 | // stack layout: |
| 4751 | // arg1 |
| 4752 | // arg2 |
| 4753 | // RETADDR |
| 4754 | // [ new RETADDR |
| 4755 | // move area ] |
| 4756 | // (possible EBP) |
| 4757 | // ESI |
| 4758 | // EDI |
| 4759 | // local1 .. |
| 4760 | |
| 4761 | /// Make the stack size align e.g 16n + 12 aligned for a 16-byte align |
| 4762 | /// requirement. |
| 4763 | unsigned |
| 4764 | X86TargetLowering::GetAlignedArgumentStackSize(const unsigned StackSize, |
| 4765 | SelectionDAG &DAG) const { |
| 4766 | const Align StackAlignment = Subtarget.getFrameLowering()->getStackAlign(); |
| 4767 | const uint64_t SlotSize = Subtarget.getRegisterInfo()->getSlotSize(); |
| 4768 | assert(StackSize % SlotSize == 0 &&(static_cast <bool> (StackSize % SlotSize == 0 && "StackSize must be a multiple of SlotSize") ? void (0) : __assert_fail ("StackSize % SlotSize == 0 && \"StackSize must be a multiple of SlotSize\"" , "llvm/lib/Target/X86/X86ISelLowering.cpp", 4769, __extension__ __PRETTY_FUNCTION__)) |
| 4769 | "StackSize must be a multiple of SlotSize")(static_cast <bool> (StackSize % SlotSize == 0 && "StackSize must be a multiple of SlotSize") ? void (0) : __assert_fail ("StackSize % SlotSize == 0 && \"StackSize must be a multiple of SlotSize\"" , "llvm/lib/Target/X86/X86ISelLowering.cpp", 4769, __extension__ __PRETTY_FUNCTION__)); |
| 4770 | return alignTo(StackSize + SlotSize, StackAlignment) - SlotSize; |
| 4771 | } |
| 4772 | |
| 4773 | /// Return true if the given stack call argument is already available in the |
| 4774 | /// same position (relatively) of the caller's incoming argument stack. |
| 4775 | static |
| 4776 | bool MatchingStackOffset(SDValue Arg, unsigned Offset, ISD::ArgFlagsTy Flags, |
| 4777 | MachineFrameInfo &MFI, const MachineRegisterInfo *MRI, |
| 4778 | const X86InstrInfo *TII, const CCValAssign &VA) { |
| 4779 | unsigned Bytes = Arg.getValueSizeInBits() / 8; |
| 4780 | |
| 4781 | for (;;) { |
| 4782 | // Look through nodes that don't alter the bits of the incoming value. |
| 4783 | unsigned Op = Arg.getOpcode(); |
| 4784 | if (Op == ISD::ZERO_EXTEND || Op == ISD::ANY_EXTEND || Op == ISD::BITCAST) { |
| 4785 | Arg = Arg.getOperand(0); |
| 4786 | continue; |
| 4787 | } |
| 4788 | if (Op == ISD::TRUNCATE) { |
| 4789 | const SDValue &TruncInput = Arg.getOperand(0); |
| 4790 | if (TruncInput.getOpcode() == ISD::AssertZext && |
| 4791 | cast<VTSDNode>(TruncInput.getOperand(1))->getVT() == |
| 4792 | Arg.getValueType()) { |
| 4793 | Arg = TruncInput.getOperand(0); |
| 4794 | continue; |
| 4795 | } |
| 4796 | } |
| 4797 | break; |
| 4798 | } |
| 4799 | |
| 4800 | int FI = INT_MAX2147483647; |
| 4801 | if (Arg.getOpcode() == ISD::CopyFromReg) { |
| 4802 | Register VR = cast<RegisterSDNode>(Arg.getOperand(1))->getReg(); |
| 4803 | if (!VR.isVirtual()) |
| 4804 | return false; |
| 4805 | MachineInstr *Def = MRI->getVRegDef(VR); |
| 4806 | if (!Def) |
| 4807 | return false; |
| 4808 | if (!Flags.isByVal()) { |
| 4809 | if (!TII->isLoadFromStackSlot(*Def, FI)) |
| 4810 | return false; |
| 4811 | } else { |
| 4812 | unsigned Opcode = Def->getOpcode(); |
| 4813 | if ((Opcode == X86::LEA32r || Opcode == X86::LEA64r || |
| 4814 | Opcode == X86::LEA64_32r) && |
| 4815 | Def->getOperand(1).isFI()) { |
| 4816 | FI = Def->getOperand(1).getIndex(); |
| 4817 | Bytes = Flags.getByValSize(); |
| 4818 | } else |
| 4819 | return false; |
| 4820 | } |
| 4821 | } else if (LoadSDNode *Ld = dyn_cast<LoadSDNode>(Arg)) { |
| 4822 | if (Flags.isByVal()) |
| 4823 | // ByVal argument is passed in as a pointer but it's now being |
| 4824 | // dereferenced. e.g. |
| 4825 | // define @foo(%struct.X* %A) { |
| 4826 | // tail call @bar(%struct.X* byval %A) |
| 4827 | // } |
| 4828 | return false; |
| 4829 | SDValue Ptr = Ld->getBasePtr(); |
| 4830 | FrameIndexSDNode *FINode = dyn_cast<FrameIndexSDNode>(Ptr); |
| 4831 | if (!FINode) |
| 4832 | return false; |
| 4833 | FI = FINode->getIndex(); |
| 4834 | } else if (Arg.getOpcode() == ISD::FrameIndex && Flags.isByVal()) { |
| 4835 | FrameIndexSDNode *FINode = cast<FrameIndexSDNode>(Arg); |
| 4836 | FI = FINode->getIndex(); |
| 4837 | Bytes = Flags.getByValSize(); |
| 4838 | } else |
| 4839 | return false; |
| 4840 | |
| 4841 | assert(FI != INT_MAX)(static_cast <bool> (FI != 2147483647) ? void (0) : __assert_fail ("FI != INT_MAX", "llvm/lib/Target/X86/X86ISelLowering.cpp", 4841, __extension__ __PRETTY_FUNCTION__)); |
| 4842 | if (!MFI.isFixedObjectIndex(FI)) |
| 4843 | return false; |
| 4844 | |
| 4845 | if (Offset != MFI.getObjectOffset(FI)) |
| 4846 | return false; |
| 4847 | |
| 4848 | // If this is not byval, check that the argument stack object is immutable. |
| 4849 | // inalloca and argument copy elision can create mutable argument stack |
| 4850 | // objects. Byval objects can be mutated, but a byval call intends to pass the |
| 4851 | // mutated memory. |
| 4852 | if (!Flags.isByVal() && !MFI.isImmutableObjectIndex(FI)) |
| 4853 | return false; |
| 4854 | |
| 4855 | if (VA.getLocVT().getFixedSizeInBits() > |
| 4856 | Arg.getValueSizeInBits().getFixedSize()) { |
| 4857 | // If the argument location is wider than the argument type, check that any |
| 4858 | // extension flags match. |
| 4859 | if (Flags.isZExt() != MFI.isObjectZExt(FI) || |
| 4860 | Flags.isSExt() != MFI.isObjectSExt(FI)) { |
| 4861 | return false; |
| 4862 | } |
| 4863 | } |
| 4864 | |
| 4865 | return Bytes == MFI.getObjectSize(FI); |
| 4866 | } |
| 4867 | |
| 4868 | /// Check whether the call is eligible for tail call optimization. Targets |
| 4869 | /// that want to do tail call optimization should implement this function. |
| 4870 | bool X86TargetLowering::IsEligibleForTailCallOptimization( |
| 4871 | SDValue Callee, CallingConv::ID CalleeCC, bool IsCalleePopSRet, |
| 4872 | bool isVarArg, Type *RetTy, const SmallVectorImpl<ISD::OutputArg> &Outs, |
| 4873 | const SmallVectorImpl<SDValue> &OutVals, |
| 4874 | const SmallVectorImpl<ISD::InputArg> &Ins, SelectionDAG &DAG) const { |
| 4875 | if (!mayTailCallThisCC(CalleeCC)) |
| 4876 | return false; |
| 4877 | |
| 4878 | // If -tailcallopt is specified, make fastcc functions tail-callable. |
| 4879 | MachineFunction &MF = DAG.getMachineFunction(); |
| 4880 | const Function &CallerF = MF.getFunction(); |
| 4881 | |
| 4882 | // If the function return type is x86_fp80 and the callee return type is not, |
| 4883 | // then the FP_EXTEND of the call result is not a nop. It's not safe to |
| 4884 | // perform a tailcall optimization here. |
| 4885 | if (CallerF.getReturnType()->isX86_FP80Ty() && !RetTy->isX86_FP80Ty()) |
| 4886 | return false; |
| 4887 | |
| 4888 | CallingConv::ID CallerCC = CallerF.getCallingConv(); |
| 4889 | bool CCMatch = CallerCC == CalleeCC; |
| 4890 | bool IsCalleeWin64 = Subtarget.isCallingConvWin64(CalleeCC); |
| 4891 | bool IsCallerWin64 = Subtarget.isCallingConvWin64(CallerCC); |
| 4892 | bool IsGuaranteeTCO = DAG.getTarget().Options.GuaranteedTailCallOpt || |
| 4893 | CalleeCC == CallingConv::Tail || CalleeCC == CallingConv::SwiftTail; |
| 4894 | |
| 4895 | // Win64 functions have extra shadow space for argument homing. Don't do the |
| 4896 | // sibcall if the caller and callee have mismatched expectations for this |
| 4897 | // space. |
| 4898 | if (IsCalleeWin64 != IsCallerWin64) |
| 4899 | return false; |
| 4900 | |
| 4901 | if (IsGuaranteeTCO) { |
| 4902 | if (canGuaranteeTCO(CalleeCC) && CCMatch) |
| 4903 | return true; |
| 4904 | return false; |
| 4905 | } |
| 4906 | |
| 4907 | // Look for obvious safe cases to perform tail call optimization that do not |
| 4908 | // require ABI changes. This is what gcc calls sibcall. |
| 4909 | |
| 4910 | // Can't do sibcall if stack needs to be dynamically re-aligned. PEI needs to |
| 4911 | // emit a special epilogue. |
| 4912 | const X86RegisterInfo *RegInfo = Subtarget.getRegisterInfo(); |
| 4913 | if (RegInfo->hasStackRealignment(MF)) |
| 4914 | return false; |
| 4915 | |
| 4916 | // Also avoid sibcall optimization if we're an sret return fn and the callee |
| 4917 | // is incompatible. See comment in LowerReturn about why hasStructRetAttr is |
| 4918 | // insufficient. |
| 4919 | if (MF.getInfo<X86MachineFunctionInfo>()->getSRetReturnReg()) { |
| 4920 | // For a compatible tail call the callee must return our sret pointer. So it |
| 4921 | // needs to be (a) an sret function itself and (b) we pass our sret as its |
| 4922 | // sret. Condition #b is harder to determine. |
| 4923 | return false; |
| 4924 | } else if (IsCalleePopSRet) |
| 4925 | // The callee pops an sret, so we cannot tail-call, as our caller doesn't |
| 4926 | // expect that. |
| 4927 | return false; |
| 4928 | |
| 4929 | // Do not sibcall optimize vararg calls unless all arguments are passed via |
| 4930 | // registers. |
| 4931 | LLVMContext &C = *DAG.getContext(); |
| 4932 | if (isVarArg && !Outs.empty()) { |
| 4933 | // Optimizing for varargs on Win64 is unlikely to be safe without |
| 4934 | // additional testing. |
| 4935 | if (IsCalleeWin64 || IsCallerWin64) |
| 4936 | return false; |
| 4937 | |
| 4938 | SmallVector<CCValAssign, 16> ArgLocs; |
| 4939 | CCState CCInfo(CalleeCC, isVarArg, MF, ArgLocs, C); |
| 4940 | |
| 4941 | CCInfo.AnalyzeCallOperands(Outs, CC_X86); |
| 4942 | for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) |
| 4943 | if (!ArgLocs[i].isRegLoc()) |
| 4944 | return false; |
| 4945 | } |
| 4946 | |
| 4947 | // If the call result is in ST0 / ST1, it needs to be popped off the x87 |
| 4948 | // stack. Therefore, if it's not used by the call it is not safe to optimize |
| 4949 | // this into a sibcall. |
| 4950 | bool Unused = false; |
| 4951 | for (unsigned i = 0, e = Ins.size(); i != e; ++i) { |
| 4952 | if (!Ins[i].Used) { |
| 4953 | Unused = true; |
| 4954 | break; |
| 4955 | } |
| 4956 | } |
| 4957 | if (Unused) { |
| 4958 | SmallVector<CCValAssign, 16> RVLocs; |
| 4959 | CCState CCInfo(CalleeCC, false, MF, RVLocs, C); |
| 4960 | CCInfo.AnalyzeCallResult(Ins, RetCC_X86); |
| 4961 | for (unsigned i = 0, e = RVLocs.size(); i != e; ++i) { |
| 4962 | CCValAssign &VA = RVLocs[i]; |
| 4963 | if (VA.getLocReg() == X86::FP0 || VA.getLocReg() == X86::FP1) |
| 4964 | return false; |
| 4965 | } |
| 4966 | } |
| 4967 | |
| 4968 | // Check that the call results are passed in the same way. |
| 4969 | if (!CCState::resultsCompatible(CalleeCC, CallerCC, MF, C, Ins, |
| 4970 | RetCC_X86, RetCC_X86)) |
| 4971 | return false; |
| 4972 | // The callee has to preserve all registers the caller needs to preserve. |
| 4973 | const X86RegisterInfo *TRI = Subtarget.getRegisterInfo(); |
| 4974 | const uint32_t *CallerPreserved = TRI->getCallPreservedMask(MF, CallerCC); |
| 4975 | if (!CCMatch) { |
| 4976 | const uint32_t *CalleePreserved = TRI->getCallPreservedMask(MF, CalleeCC); |
| 4977 | if (!TRI->regmaskSubsetEqual(CallerPreserved, CalleePreserved)) |
| 4978 | return false; |
| 4979 | } |
| 4980 | |
| 4981 | unsigned StackArgsSize = 0; |
| 4982 | |
| 4983 | // If the callee takes no arguments then go on to check the results of the |
| 4984 | // call. |
| 4985 | if (!Outs.empty()) { |
| 4986 | // Check if stack adjustment is needed. For now, do not do this if any |
| 4987 | // argument is passed on the stack. |
| 4988 | SmallVector<CCValAssign, 16> ArgLocs; |
| 4989 | CCState CCInfo(CalleeCC, isVarArg, MF, ArgLocs, C); |
| 4990 | |
| 4991 | // Allocate shadow area for Win64 |
| 4992 | if (IsCalleeWin64) |
| 4993 | CCInfo.AllocateStack(32, Align(8)); |
| 4994 | |
| 4995 | CCInfo.AnalyzeCallOperands(Outs, CC_X86); |
| 4996 | StackArgsSize = CCInfo.getNextStackOffset(); |
| 4997 | |
| 4998 | if (CCInfo.getNextStackOffset()) { |
| 4999 | // Check if the arguments are already laid out in the right way as |
| 5000 | // the caller's fixed stack objects. |
| 5001 | MachineFrameInfo &MFI = MF.getFrameInfo(); |
| 5002 | const MachineRegisterInfo *MRI = &MF.getRegInfo(); |
| 5003 | const X86InstrInfo *TII = Subtarget.getInstrInfo(); |
| 5004 | for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) { |
| 5005 | CCValAssign &VA = ArgLocs[i]; |
| 5006 | SDValue Arg = OutVals[i]; |
| 5007 | ISD::ArgFlagsTy Flags = Outs[i].Flags; |
| 5008 | if (VA.getLocInfo() == CCValAssign::Indirect) |
| 5009 | return false; |
| 5010 | if (!VA.isRegLoc()) { |
| 5011 | if (!MatchingStackOffset(Arg, VA.getLocMemOffset(), Flags, |
| 5012 | MFI, MRI, TII, VA)) |
| 5013 | return false; |
| 5014 | } |
| 5015 | } |
| 5016 | } |
| 5017 | |
| 5018 | bool PositionIndependent = isPositionIndependent(); |
| 5019 | // If the tailcall address may be in a register, then make sure it's |
| 5020 | // possible to register allocate for it. In 32-bit, the call address can |
| 5021 | // only target EAX, EDX, or ECX since the tail call must be scheduled after |
| 5022 | // callee-saved registers are restored. These happen to be the same |
| 5023 | // registers used to pass 'inreg' arguments so watch out for those. |
| 5024 | if (!Subtarget.is64Bit() && ((!isa<GlobalAddressSDNode>(Callee) && |
| 5025 | !isa<ExternalSymbolSDNode>(Callee)) || |
| 5026 | PositionIndependent)) { |
| 5027 | unsigned NumInRegs = 0; |
| 5028 | // In PIC we need an extra register to formulate the address computation |
| 5029 | // for the callee. |
| 5030 | unsigned MaxInRegs = PositionIndependent ? 2 : 3; |
| 5031 | |
| 5032 | for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) { |
| 5033 | CCValAssign &VA = ArgLocs[i]; |
| 5034 | if (!VA.isRegLoc()) |
| 5035 | continue; |
| 5036 | Register Reg = VA.getLocReg(); |
| 5037 | switch (Reg) { |
| 5038 | default: break; |
| 5039 | case X86::EAX: case X86::EDX: case X86::ECX: |
| 5040 | if (++NumInRegs == MaxInRegs) |
| 5041 | return false; |
| 5042 | break; |
| 5043 | } |
| 5044 | } |
| 5045 | } |
| 5046 | |
| 5047 | const MachineRegisterInfo &MRI = MF.getRegInfo(); |
| 5048 | if (!parametersInCSRMatch(MRI, CallerPreserved, ArgLocs, OutVals)) |
| 5049 | return false; |
| 5050 | } |
| 5051 | |
| 5052 | bool CalleeWillPop = |
| 5053 | X86::isCalleePop(CalleeCC, Subtarget.is64Bit(), isVarArg, |
| 5054 | MF.getTarget().Options.GuaranteedTailCallOpt); |
| 5055 | |
| 5056 | if (unsigned BytesToPop = |
| 5057 | MF.getInfo<X86MachineFunctionInfo>()->getBytesToPopOnReturn()) { |
| 5058 | // If we have bytes to pop, the callee must pop them. |
| 5059 | bool CalleePopMatches = CalleeWillPop && BytesToPop == StackArgsSize; |
| 5060 | if (!CalleePopMatches) |
| 5061 | return false; |
| 5062 | } else if (CalleeWillPop && StackArgsSize > 0) { |
| 5063 | // If we don't have bytes to pop, make sure the callee doesn't pop any. |
| 5064 | return false; |
| 5065 | } |
| 5066 | |
| 5067 | return true; |
| 5068 | } |
| 5069 | |
| 5070 | FastISel * |
| 5071 | X86TargetLowering::createFastISel(FunctionLoweringInfo &funcInfo, |
| 5072 | const TargetLibraryInfo *libInfo) const { |
| 5073 | return X86::createFastISel(funcInfo, libInfo); |
| 5074 | } |
| 5075 | |
| 5076 | //===----------------------------------------------------------------------===// |
| 5077 | // Other Lowering Hooks |
| 5078 | //===----------------------------------------------------------------------===// |
| 5079 | |
| 5080 | bool X86::mayFoldLoad(SDValue Op, const X86Subtarget &Subtarget, |
| 5081 | bool AssumeSingleUse) { |
| 5082 | if (!AssumeSingleUse && !Op.hasOneUse()) |
| 5083 | return false; |
| 5084 | if (!ISD::isNormalLoad(Op.getNode())) |
| 5085 | return false; |
| 5086 | |
| 5087 | // If this is an unaligned vector, make sure the target supports folding it. |
| 5088 | auto *Ld = cast<LoadSDNode>(Op.getNode()); |
| 5089 | if (!Subtarget.hasAVX() && !Subtarget.hasSSEUnalignedMem() && |
| 5090 | Ld->getValueSizeInBits(0) == 128 && Ld->getAlignment() < 16) |
| 5091 | return false; |
| 5092 | |
| 5093 | // TODO: If this is a non-temporal load and the target has an instruction |
| 5094 | // for it, it should not be folded. See "useNonTemporalLoad()". |
| 5095 | |
| 5096 | return true; |
| 5097 | } |
| 5098 | |
| 5099 | bool X86::mayFoldLoadIntoBroadcastFromMem(SDValue Op, MVT EltVT, |
| 5100 | const X86Subtarget &Subtarget, |
| 5101 | bool AssumeSingleUse) { |
| 5102 | assert(Subtarget.hasAVX() && "Expected AVX for broadcast from memory")(static_cast <bool> (Subtarget.hasAVX() && "Expected AVX for broadcast from memory" ) ? void (0) : __assert_fail ("Subtarget.hasAVX() && \"Expected AVX for broadcast from memory\"" , "llvm/lib/Target/X86/X86ISelLowering.cpp", 5102, __extension__ __PRETTY_FUNCTION__)); |
| 5103 | if (!X86::mayFoldLoad(Op, Subtarget, AssumeSingleUse)) |
| 5104 | return false; |
| 5105 | |
| 5106 | // We can not replace a wide volatile load with a broadcast-from-memory, |
| 5107 | // because that would narrow the load, which isn't legal for volatiles. |
| 5108 | auto *Ld = cast<LoadSDNode>(Op.getNode()); |
| 5109 | return !Ld->isVolatile() || |
| 5110 | Ld->getValueSizeInBits(0) == EltVT.getScalarSizeInBits(); |
| 5111 | } |
| 5112 | |
| 5113 | bool X86::mayFoldIntoStore(SDValue Op) { |
| 5114 | return Op.hasOneUse() && ISD::isNormalStore(*Op.getNode()->use_begin()); |
| 5115 | } |
| 5116 | |
| 5117 | bool X86::mayFoldIntoZeroExtend(SDValue Op) { |
| 5118 | if (Op.hasOneUse()) { |
| 5119 | unsigned Opcode = Op.getNode()->use_begin()->getOpcode(); |
| 5120 | return (ISD::ZERO_EXTEND == Opcode); |
| 5121 | } |
| 5122 | return false; |
| 5123 | } |
| 5124 | |
| 5125 | static bool isTargetShuffle(unsigned Opcode) { |
| 5126 | switch(Opcode) { |
| 5127 | default: return false; |
| 5128 | case X86ISD::BLENDI: |
| 5129 | case X86ISD::PSHUFB: |
| 5130 | case X86ISD::PSHUFD: |
| 5131 | case X86ISD::PSHUFHW: |
| 5132 | case X86ISD::PSHUFLW: |
| 5133 | case X86ISD::SHUFP: |
| 5134 | case X86ISD::INSERTPS: |
| 5135 | case X86ISD::EXTRQI: |
| 5136 | case X86ISD::INSERTQI: |
| 5137 | case X86ISD::VALIGN: |
| 5138 | case X86ISD::PALIGNR: |
| 5139 | case X86ISD::VSHLDQ: |
| 5140 | case X86ISD::VSRLDQ: |
| 5141 | case X86ISD::MOVLHPS: |
| 5142 | case X86ISD::MOVHLPS: |
| 5143 | case X86ISD::MOVSHDUP: |
| 5144 | case X86ISD::MOVSLDUP: |
| 5145 | case X86ISD::MOVDDUP: |
| 5146 | case X86ISD::MOVSS: |
| 5147 | case X86ISD::MOVSD: |
| 5148 | case X86ISD::MOVSH: |
| 5149 | case X86ISD::UNPCKL: |
| 5150 | case X86ISD::UNPCKH: |
| 5151 | case X86ISD::VBROADCAST: |
| 5152 | case X86ISD::VPERMILPI: |
| 5153 | case X86ISD::VPERMILPV: |
| 5154 | case X86ISD::VPERM2X128: |
| 5155 | case X86ISD::SHUF128: |
| 5156 | case X86ISD::VPERMIL2: |
| 5157 | case X86ISD::VPERMI: |
| 5158 | case X86ISD::VPPERM: |
| 5159 | case X86ISD::VPERMV: |
| 5160 | case X86ISD::VPERMV3: |
| 5161 | case X86ISD::VZEXT_MOVL: |
| 5162 | return true; |
| 5163 | } |
| 5164 | } |
| 5165 | |
| 5166 | static bool isTargetShuffleVariableMask(unsigned Opcode) { |
| 5167 | switch (Opcode) { |
| 5168 | default: return false; |
| 5169 | // Target Shuffles. |
| 5170 | case X86ISD::PSHUFB: |
| 5171 | case X86ISD::VPERMILPV: |
| 5172 | case X86ISD::VPERMIL2: |
| 5173 | case X86ISD::VPPERM: |
| 5174 | case X86ISD::VPERMV: |
| 5175 | case X86ISD::VPERMV3: |
| 5176 | return true; |
| 5177 | // 'Faux' Target Shuffles. |
| 5178 | case ISD::OR: |
| 5179 | case ISD::AND: |
| 5180 | case X86ISD::ANDNP: |
| 5181 | return true; |
| 5182 | } |
| 5183 | } |
| 5184 | |
| 5185 | static bool isTargetShuffleSplat(SDValue Op) { |
| 5186 | unsigned Opcode = Op.getOpcode(); |
| 5187 | if (Opcode == ISD::EXTRACT_SUBVECTOR) |
| 5188 | return isTargetShuffleSplat(Op.getOperand(0)); |
| 5189 | return Opcode == X86ISD::VBROADCAST || Opcode == X86ISD::VBROADCAST_LOAD; |
| 5190 | } |
| 5191 | |
| 5192 | SDValue X86TargetLowering::getReturnAddressFrameIndex(SelectionDAG &DAG) const { |
| 5193 | MachineFunction &MF = DAG.getMachineFunction(); |
| 5194 | const X86RegisterInfo *RegInfo = Subtarget.getRegisterInfo(); |
| 5195 | X86MachineFunctionInfo *FuncInfo = MF.getInfo<X86MachineFunctionInfo>(); |
| 5196 | int ReturnAddrIndex = FuncInfo->getRAIndex(); |
| 5197 | |
| 5198 | if (ReturnAddrIndex == 0) { |
| 5199 | // Set up a frame object for the return address. |
| 5200 | unsigned SlotSize = RegInfo->getSlotSize(); |
| 5201 | ReturnAddrIndex = MF.getFrameInfo().CreateFixedObject(SlotSize, |
| 5202 | -(int64_t)SlotSize, |
| 5203 | false); |
| 5204 | FuncInfo->setRAIndex(ReturnAddrIndex); |
| 5205 | } |
| 5206 | |
| 5207 | return DAG.getFrameIndex(ReturnAddrIndex, getPointerTy(DAG.getDataLayout())); |
| 5208 | } |
| 5209 | |
| 5210 | bool X86::isOffsetSuitableForCodeModel(int64_t Offset, CodeModel::Model M, |
| 5211 | bool hasSymbolicDisplacement) { |
| 5212 | // Offset should fit into 32 bit immediate field. |
| 5213 | if (!isInt<32>(Offset)) |
| 5214 | return false; |
| 5215 | |
| 5216 | // If we don't have a symbolic displacement - we don't have any extra |
| 5217 | // restrictions. |
| 5218 | if (!hasSymbolicDisplacement) |
| 5219 | return true; |
| 5220 | |
| 5221 | // FIXME: Some tweaks might be needed for medium code model. |
| 5222 | if (M != CodeModel::Small && M != CodeModel::Kernel) |
| 5223 | return false; |
| 5224 | |
| 5225 | // For small code model we assume that latest object is 16MB before end of 31 |
| 5226 | // bits boundary. We may also accept pretty large negative constants knowing |
| 5227 | // that all objects are in the positive half of address space. |
| 5228 | if (M == CodeModel::Small && Offset < 16*1024*1024) |
| 5229 | return true; |
| 5230 | |
| 5231 | // For kernel code model we know that all object resist in the negative half |
| 5232 | // of 32bits address space. We may not accept negative offsets, since they may |
| 5233 | // be just off and we may accept pretty large positive ones. |
| 5234 | if (M == CodeModel::Kernel && Offset >= 0) |
| 5235 | return true; |
| 5236 | |
| 5237 | return false; |
| 5238 | } |
| 5239 | |
| 5240 | /// Determines whether the callee is required to pop its own arguments. |
| 5241 | /// Callee pop is necessary to support tail calls. |
| 5242 | bool X86::isCalleePop(CallingConv::ID CallingConv, |
| 5243 | bool is64Bit, bool IsVarArg, bool GuaranteeTCO) { |
| 5244 | // If GuaranteeTCO is true, we force some calls to be callee pop so that we |
| 5245 | // can guarantee TCO. |
| 5246 | if (!IsVarArg && shouldGuaranteeTCO(CallingConv, GuaranteeTCO)) |
| 5247 | return true; |
| 5248 | |
| 5249 | switch (CallingConv) { |
| 5250 | default: |
| 5251 | return false; |
| 5252 | case CallingConv::X86_StdCall: |
| 5253 | case CallingConv::X86_FastCall: |
| 5254 | case CallingConv::X86_ThisCall: |
| 5255 | case CallingConv::X86_VectorCall: |
| 5256 | return !is64Bit; |
| 5257 | } |
| 5258 | } |
| 5259 | |
| 5260 | /// Return true if the condition is an signed comparison operation. |
| 5261 | static bool isX86CCSigned(unsigned X86CC) { |
| 5262 | switch (X86CC) { |
| 5263 | default: |
| 5264 | llvm_unreachable("Invalid integer condition!")::llvm::llvm_unreachable_internal("Invalid integer condition!" , "llvm/lib/Target/X86/X86ISelLowering.cpp", 5264); |
| 5265 | case X86::COND_E: |
| 5266 | case X86::COND_NE: |
| 5267 | case X86::COND_B: |
| 5268 | case X86::COND_A: |
| 5269 | case X86::COND_BE: |
| 5270 | case X86::COND_AE: |
| 5271 | return false; |
| 5272 | case X86::COND_G: |
| 5273 | case X86::COND_GE: |
| 5274 | case X86::COND_L: |
| 5275 | case X86::COND_LE: |
| 5276 | return true; |
| 5277 | } |
| 5278 | } |
| 5279 | |
| 5280 | static X86::CondCode TranslateIntegerX86CC(ISD::CondCode SetCCOpcode) { |
| 5281 | switch (SetCCOpcode) { |
| 5282 | default: llvm_unreachable("Invalid integer condition!")::llvm::llvm_unreachable_internal("Invalid integer condition!" , "llvm/lib/Target/X86/X86ISelLowering.cpp", 5282); |
| 5283 | case ISD::SETEQ: return X86::COND_E; |
| 5284 | case ISD::SETGT: return X86::COND_G; |
| 5285 | case ISD::SETGE: return X86::COND_GE; |
| 5286 | case ISD::SETLT: return X86::COND_L; |
| 5287 | case ISD::SETLE: return X86::COND_LE; |
| 5288 | case ISD::SETNE: return X86::COND_NE; |
| 5289 | case ISD::SETULT: return X86::COND_B; |
| 5290 | case ISD::SETUGT: return X86::COND_A; |
| 5291 | case ISD::SETULE: return X86::COND_BE; |
| 5292 | case ISD::SETUGE: return X86::COND_AE; |
| 5293 | } |
| 5294 | } |
| 5295 | |
| 5296 | /// Do a one-to-one translation of a ISD::CondCode to the X86-specific |
| 5297 | /// condition code, returning the condition code and the LHS/RHS of the |
| 5298 | /// comparison to make. |
| 5299 | static X86::CondCode TranslateX86CC(ISD::CondCode SetCCOpcode, const SDLoc &DL, |
| 5300 | bool isFP, SDValue &LHS, SDValue &RHS, |
| 5301 | SelectionDAG &DAG) { |
| 5302 | if (!isFP) { |
| 5303 | if (ConstantSDNode *RHSC = dyn_cast<ConstantSDNode>(RHS)) { |
| 5304 | if (SetCCOpcode == ISD::SETGT && RHSC->isAllOnes()) { |
| 5305 | // X > -1 -> X == 0, jump !sign. |
| 5306 | RHS = DAG.getConstant(0, DL, RHS.getValueType()); |
| 5307 | return X86::COND_NS; |
| 5308 | } |
| 5309 | if (SetCCOpcode == ISD::SETLT && RHSC->isZero()) { |
| 5310 | // X < 0 -> X == 0, jump on sign. |
| 5311 | return X86::COND_S; |
| 5312 | } |
| 5313 | if (SetCCOpcode == ISD::SETGE && RHSC->isZero()) { |
| 5314 | // X >= 0 -> X == 0, jump on !sign. |
| 5315 | return X86::COND_NS; |
| 5316 | } |
| 5317 | if (SetCCOpcode == ISD::SETLT && RHSC->isOne()) { |
| 5318 | // X < 1 -> X <= 0 |
| 5319 | RHS = DAG.getConstant(0, DL, RHS.getValueType()); |
| 5320 | return X86::COND_LE; |
| 5321 | } |
| 5322 | } |
| 5323 | |
| 5324 | return TranslateIntegerX86CC(SetCCOpcode); |
| 5325 | } |
| 5326 | |
| 5327 | // First determine if it is required or is profitable to flip the operands. |
| 5328 | |
| 5329 | // If LHS is a foldable load, but RHS is not, flip the condition. |
| 5330 | if (ISD::isNON_EXTLoad(LHS.getNode()) && |
| 5331 | !ISD::isNON_EXTLoad(RHS.getNode())) { |
| 5332 | SetCCOpcode = getSetCCSwappedOperands(SetCCOpcode); |
| 5333 | std::swap(LHS, RHS); |
| 5334 | } |
| 5335 | |
| 5336 | switch (SetCCOpcode) { |
| 5337 | default: break; |
| 5338 | case ISD::SETOLT: |
| 5339 | case ISD::SETOLE: |
| 5340 | case ISD::SETUGT: |
| 5341 | case ISD::SETUGE: |
| 5342 | std::swap(LHS, RHS); |
| 5343 | break; |
| 5344 | } |
| 5345 | |
| 5346 | // On a floating point condition, the flags are set as follows: |
| 5347 | // ZF PF CF op |
| 5348 | // 0 | 0 | 0 | X > Y |
| 5349 | // 0 | 0 | 1 | X < Y |
| 5350 | // 1 | 0 | 0 | X == Y |
| 5351 | // 1 | 1 | 1 | unordered |
| 5352 | switch (SetCCOpcode) { |
| 5353 | default: llvm_unreachable("Condcode should be pre-legalized away")::llvm::llvm_unreachable_internal("Condcode should be pre-legalized away" , "llvm/lib/Target/X86/X86ISelLowering.cpp", 5353); |
| 5354 | case ISD::SETUEQ: |
| 5355 | case ISD::SETEQ: return X86::COND_E; |
| 5356 | case ISD::SETOLT: // flipped |
| 5357 | case ISD::SETOGT: |
| 5358 | case ISD::SETGT: return X86::COND_A; |
| 5359 | case ISD::SETOLE: // flipped |
| 5360 | case ISD::SETOGE: |
| 5361 | case ISD::SETGE: return X86::COND_AE; |
| 5362 | case ISD::SETUGT: // flipped |
| 5363 | case ISD::SETULT: |
| 5364 | case ISD::SETLT: return X86::COND_B; |
| 5365 | case ISD::SETUGE: // flipped |
| 5366 | case ISD::SETULE: |
| 5367 | case ISD::SETLE: return X86::COND_BE; |
| 5368 | case ISD::SETONE: |
| 5369 | case ISD::SETNE: return X86::COND_NE; |
| 5370 | case ISD::SETUO: return X86::COND_P; |
| 5371 | case ISD::SETO: return X86::COND_NP; |
| 5372 | case ISD::SETOEQ: |
| 5373 | case ISD::SETUNE: return X86::COND_INVALID; |
| 5374 | } |
| 5375 | } |
| 5376 | |
| 5377 | /// Is there a floating point cmov for the specific X86 condition code? |
| 5378 | /// Current x86 isa includes the following FP cmov instructions: |
| 5379 | /// fcmovb, fcomvbe, fcomve, fcmovu, fcmovae, fcmova, fcmovne, fcmovnu. |
| 5380 | static bool hasFPCMov(unsigned X86CC) { |
| 5381 | switch (X86CC) { |
| 5382 | default: |
| 5383 | return false; |
| 5384 | case X86::COND_B: |
| 5385 | case X86::COND_BE: |
| 5386 | case X86::COND_E: |
| 5387 | case X86::COND_P: |
| 5388 | case X86::COND_A: |
| 5389 | case X86::COND_AE: |
| 5390 | case X86::COND_NE: |
| 5391 | case X86::COND_NP: |
| 5392 | return true; |
| 5393 | } |
| 5394 | } |
| 5395 | |
| 5396 | static bool useVPTERNLOG(const X86Subtarget &Subtarget, MVT VT) { |
| 5397 | return Subtarget.hasVLX() || Subtarget.canExtendTo512DQ() || |
| 5398 | VT.is512BitVector(); |
| 5399 | } |
| 5400 | |
| 5401 | bool X86TargetLowering::getTgtMemIntrinsic(IntrinsicInfo &Info, |
| 5402 | const CallInst &I, |
| 5403 | MachineFunction &MF, |
| 5404 | unsigned Intrinsic) const { |
| 5405 | Info.flags = MachineMemOperand::MONone; |
| 5406 | Info.offset = 0; |
| 5407 | |
| 5408 | const IntrinsicData* IntrData = getIntrinsicWithChain(Intrinsic); |
| 5409 | if (!IntrData) { |
| 5410 | switch (Intrinsic) { |
| 5411 | case Intrinsic::x86_aesenc128kl: |
| 5412 | case Intrinsic::x86_aesdec128kl: |
| 5413 | Info.opc = ISD::INTRINSIC_W_CHAIN; |
| 5414 | Info.ptrVal = I.getArgOperand(1); |
| 5415 | Info.memVT = EVT::getIntegerVT(I.getType()->getContext(), 48); |
| 5416 | Info.align = Align(1); |
| 5417 | Info.flags |= MachineMemOperand::MOLoad; |
| 5418 | return true; |
| 5419 | case Intrinsic::x86_aesenc256kl: |
| 5420 | case Intrinsic::x86_aesdec256kl: |
| 5421 | Info.opc = ISD::INTRINSIC_W_CHAIN; |
| 5422 | Info.ptrVal = I.getArgOperand(1); |
| 5423 | Info.memVT = EVT::getIntegerVT(I.getType()->getContext(), 64); |
| 5424 | Info.align = Align(1); |
| 5425 | Info.flags |= MachineMemOperand::MOLoad; |
| 5426 | return true; |
| 5427 | case Intrinsic::x86_aesencwide128kl: |
| 5428 | case Intrinsic::x86_aesdecwide128kl: |
| 5429 | Info.opc = ISD::INTRINSIC_W_CHAIN; |
| 5430 | Info.ptrVal = I.getArgOperand(0); |
| 5431 | Info.memVT = EVT::getIntegerVT(I.getType()->getContext(), 48); |
| 5432 | Info.align = Align(1); |
| 5433 | Info.flags |= MachineMemOperand::MOLoad; |
| 5434 | return true; |
| 5435 | case Intrinsic::x86_aesencwide256kl: |
| 5436 | case Intrinsic::x86_aesdecwide256kl: |
| 5437 | Info.opc = ISD::INTRINSIC_W_CHAIN; |
| 5438 | Info.ptrVal = I.getArgOperand(0); |
| 5439 | Info.memVT = EVT::getIntegerVT(I.getType()->getContext(), 64); |
| 5440 | Info.align = Align(1); |
| 5441 | Info.flags |= MachineMemOperand::MOLoad; |
| 5442 | return true; |
| 5443 | case Intrinsic::x86_atomic_bts: |
| 5444 | case Intrinsic::x86_atomic_btc: |
| 5445 | case Intrinsic::x86_atomic_btr: { |
| 5446 | Info.opc = ISD::INTRINSIC_W_CHAIN; |
| 5447 | Info.ptrVal = I.getArgOperand(0); |
| 5448 | unsigned Size = I.getType()->getScalarSizeInBits(); |
| 5449 | Info.memVT = EVT::getIntegerVT(I.getType()->getContext(), Size); |
| 5450 | Info.align = Align(Size); |
| 5451 | Info.flags |= MachineMemOperand::MOLoad | MachineMemOperand::MOStore | |
| 5452 | MachineMemOperand::MOVolatile; |
| 5453 | return true; |
| 5454 | } |
| 5455 | } |
| 5456 | return false; |
| 5457 | } |
| 5458 | |
| 5459 | switch (IntrData->Type) { |
| 5460 | case TRUNCATE_TO_MEM_VI8: |
| 5461 | case TRUNCATE_TO_MEM_VI16: |
| 5462 | case TRUNCATE_TO_MEM_VI32: { |
| 5463 | Info.opc = ISD::INTRINSIC_VOID; |
| 5464 | Info.ptrVal = I.getArgOperand(0); |
| 5465 | MVT VT = MVT::getVT(I.getArgOperand(1)->getType()); |
| 5466 | MVT ScalarVT = MVT::INVALID_SIMPLE_VALUE_TYPE; |
| 5467 | if (IntrData->Type == TRUNCATE_TO_MEM_VI8) |
| 5468 | ScalarVT = MVT::i8; |
| 5469 | else if (IntrData->Type == TRUNCATE_TO_MEM_VI16) |
| 5470 | ScalarVT = MVT::i16; |
| 5471 | else if (IntrData->Type == TRUNCATE_TO_MEM_VI32) |
| 5472 | ScalarVT = MVT::i32; |
| 5473 | |
| 5474 | Info.memVT = MVT::getVectorVT(ScalarVT, VT.getVectorNumElements()); |
| 5475 | Info.align = Align(1); |
| 5476 | Info.flags |= MachineMemOperand::MOStore; |
| 5477 | break; |
| 5478 | } |
| 5479 | case GATHER: |
| 5480 | case GATHER_AVX2: { |
| 5481 | Info.opc = ISD::INTRINSIC_W_CHAIN; |
| 5482 | Info.ptrVal = nullptr; |
| 5483 | MVT DataVT = MVT::getVT(I.getType()); |
| 5484 | MVT IndexVT = MVT::getVT(I.getArgOperand(2)->getType()); |
| 5485 | unsigned NumElts = std::min(DataVT.getVectorNumElements(), |
| 5486 | IndexVT.getVectorNumElements()); |
| 5487 | Info.memVT = MVT::getVectorVT(DataVT.getVectorElementType(), NumElts); |
| 5488 | Info.align = Align(1); |
| 5489 | Info.flags |= MachineMemOperand::MOLoad; |
| 5490 | break; |
| 5491 | } |
| 5492 | case SCATTER: { |
| 5493 | Info.opc = ISD::INTRINSIC_VOID; |
| 5494 | Info.ptrVal = nullptr; |
| 5495 | MVT DataVT = MVT::getVT(I.getArgOperand(3)->getType()); |
| 5496 | MVT IndexVT = MVT::getVT(I.getArgOperand(2)->getType()); |
| 5497 | unsigned NumElts = std::min(DataVT.getVectorNumElements(), |
| 5498 | IndexVT.getVectorNumElements()); |
| 5499 | Info.memVT = MVT::getVectorVT(DataVT.getVectorElementType(), NumElts); |
| 5500 | Info.align = Align(1); |
| 5501 | Info.flags |= MachineMemOperand::MOStore; |
| 5502 | break; |
| 5503 | } |
| 5504 | default: |
| 5505 | return false; |
| 5506 | } |
| 5507 | |
| 5508 | return true; |
| 5509 | } |
| 5510 | |
| 5511 | /// Returns true if the target can instruction select the |
| 5512 | /// specified FP immediate natively. If false, the legalizer will |
| 5513 | /// materialize the FP immediate as a load from a constant pool. |
| 5514 | bool X86TargetLowering::isFPImmLegal(const APFloat &Imm, EVT VT, |
| 5515 | bool ForCodeSize) const { |
| 5516 | for (const APFloat &FPImm : LegalFPImmediates) |
| 5517 | if (Imm.bitwiseIsEqual(FPImm)) |
| 5518 | return true; |
| 5519 | return false; |
| 5520 | } |
| 5521 | |
| 5522 | bool X86TargetLowering::shouldReduceLoadWidth(SDNode *Load, |
| 5523 | ISD::LoadExtType ExtTy, |
| 5524 | EVT NewVT) const { |
| 5525 | assert(cast<LoadSDNode>(Load)->isSimple() && "illegal to narrow")(static_cast <bool> (cast<LoadSDNode>(Load)->isSimple () && "illegal to narrow") ? void (0) : __assert_fail ("cast<LoadSDNode>(Load)->isSimple() && \"illegal to narrow\"" , "llvm/lib/Target/X86/X86ISelLowering.cpp", 5525, __extension__ __PRETTY_FUNCTION__)); |
| 5526 | |
| 5527 | // "ELF Handling for Thread-Local Storage" specifies that R_X86_64_GOTTPOFF |
| 5528 | // relocation target a movq or addq instruction: don't let the load shrink. |
| 5529 | SDValue BasePtr = cast<LoadSDNode>(Load)->getBasePtr(); |
| 5530 | if (BasePtr.getOpcode() == X86ISD::WrapperRIP) |
| 5531 | if (const auto *GA = dyn_cast<GlobalAddressSDNode>(BasePtr.getOperand(0))) |
| 5532 | return GA->getTargetFlags() != X86II::MO_GOTTPOFF; |
| 5533 | |
| 5534 | // If this is an (1) AVX vector load with (2) multiple uses and (3) all of |
| 5535 | // those uses are extracted directly into a store, then the extract + store |
| 5536 | // can be store-folded. Therefore, it's probably not worth splitting the load. |
| 5537 | EVT VT = Load->getValueType(0); |
| 5538 | if ((VT.is256BitVector() || VT.is512BitVector()) && !Load->hasOneUse()) { |
| 5539 | for (auto UI = Load->use_begin(), UE = Load->use_end(); UI != UE; ++UI) { |
| 5540 | // Skip uses of the chain value. Result 0 of the node is the load value. |
| 5541 | if (UI.getUse().getResNo() != 0) |
| 5542 | continue; |
| 5543 | |
| 5544 | // If this use is not an extract + store, it's probably worth splitting. |
| 5545 | if (UI->getOpcode() != ISD::EXTRACT_SUBVECTOR || !UI->hasOneUse() || |
| 5546 | UI->use_begin()->getOpcode() != ISD::STORE) |
| 5547 | return true; |
| 5548 | } |
| 5549 | // All non-chain uses are extract + store. |
| 5550 | return false; |
| 5551 | } |
| 5552 | |
| 5553 | return true; |
| 5554 | } |
| 5555 | |
| 5556 | /// Returns true if it is beneficial to convert a load of a constant |
| 5557 | /// to just the constant itself. |
| 5558 | bool X86TargetLowering::shouldConvertConstantLoadToIntImm(const APInt &Imm, |
| 5559 | Type *Ty) const { |
| 5560 | assert(Ty->isIntegerTy())(static_cast <bool> (Ty->isIntegerTy()) ? void (0) : __assert_fail ("Ty->isIntegerTy()", "llvm/lib/Target/X86/X86ISelLowering.cpp" , 5560, __extension__ __PRETTY_FUNCTION__)); |
| 5561 | |
| 5562 | unsigned BitSize = Ty->getPrimitiveSizeInBits(); |
| 5563 | if (BitSize == 0 || BitSize > 64) |
| 5564 | return false; |
| 5565 | return true; |
| 5566 | } |
| 5567 | |
| 5568 | bool X86TargetLowering::reduceSelectOfFPConstantLoads(EVT CmpOpVT) const { |
| 5569 | // If we are using XMM registers in the ABI and the condition of the select is |
| 5570 | // a floating-point compare and we have blendv or conditional move, then it is |
| 5571 | // cheaper to select instead of doing a cross-register move and creating a |
| 5572 | // load that depends on the compare result. |
| 5573 | bool IsFPSetCC = CmpOpVT.isFloatingPoint() && CmpOpVT != MVT::f128; |
| 5574 | return !IsFPSetCC || !Subtarget.isTarget64BitLP64() || !Subtarget.hasAVX(); |
| 5575 | } |
| 5576 | |
| 5577 | bool X86TargetLowering::convertSelectOfConstantsToMath(EVT VT) const { |
| 5578 | // TODO: It might be a win to ease or lift this restriction, but the generic |
| 5579 | // folds in DAGCombiner conflict with vector folds for an AVX512 target. |
| 5580 | if (VT.isVector() && Subtarget.hasAVX512()) |
| 5581 | return false; |
| 5582 | |
| 5583 | return true; |
| 5584 | } |
| 5585 | |
| 5586 | bool X86TargetLowering::decomposeMulByConstant(LLVMContext &Context, EVT VT, |
| 5587 | SDValue C) const { |
| 5588 | // TODO: We handle scalars using custom code, but generic combining could make |
| 5589 | // that unnecessary. |
| 5590 | APInt MulC; |
| 5591 | if (!ISD::isConstantSplatVector(C.getNode(), MulC)) |
| 5592 | return false; |
| 5593 | |
| 5594 | // Find the type this will be legalized too. Otherwise we might prematurely |
| 5595 | // convert this to shl+add/sub and then still have to type legalize those ops. |
| 5596 | // Another choice would be to defer the decision for illegal types until |
| 5597 | // after type legalization. But constant splat vectors of i64 can't make it |
| 5598 | // through type legalization on 32-bit targets so we would need to special |
| 5599 | // case vXi64. |
| 5600 | while (getTypeAction(Context, VT) != TypeLegal) |
| 5601 | VT = getTypeToTransformTo(Context, VT); |
| 5602 | |
| 5603 | // If vector multiply is legal, assume that's faster than shl + add/sub. |
| 5604 | // Multiply is a complex op with higher latency and lower throughput in |
| 5605 | // most implementations, sub-vXi32 vector multiplies are always fast, |
| 5606 | // vXi32 mustn't have a SlowMULLD implementation, and anything larger (vXi64) |
| 5607 | // is always going to be slow. |
| 5608 | unsigned EltSizeInBits = VT.getScalarSizeInBits(); |
| 5609 | if (isOperationLegal(ISD::MUL, VT) && EltSizeInBits <= 32 && |
| 5610 | (EltSizeInBits != 32 || !Subtarget.isPMULLDSlow())) |
| 5611 | return false; |
| 5612 | |
| 5613 | // shl+add, shl+sub, shl+add+neg |
| 5614 | return (MulC + 1).isPowerOf2() || (MulC - 1).isPowerOf2() || |
| 5615 | (1 - MulC).isPowerOf2() || (-(MulC + 1)).isPowerOf2(); |
| 5616 | } |
| 5617 | |
| 5618 | bool X86TargetLowering::isExtractSubvectorCheap(EVT ResVT, EVT SrcVT, |
| 5619 | unsigned Index) const { |
| 5620 | if (!isOperationLegalOrCustom(ISD::EXTRACT_SUBVECTOR, ResVT)) |
| 5621 | return false; |
| 5622 | |
| 5623 | // Mask vectors support all subregister combinations and operations that |
| 5624 | // extract half of vector. |
| 5625 | if (ResVT.getVectorElementType() == MVT::i1) |
| 5626 | return Index == 0 || ((ResVT.getSizeInBits() == SrcVT.getSizeInBits()*2) && |
| 5627 | (Index == ResVT.getVectorNumElements())); |
| 5628 | |
| 5629 | return (Index % ResVT.getVectorNumElements()) == 0; |
| 5630 | } |
| 5631 | |
| 5632 | bool X86TargetLowering::shouldScalarizeBinop(SDValue VecOp) const { |
| 5633 | unsigned Opc = VecOp.getOpcode(); |
| 5634 | |
| 5635 | // Assume target opcodes can't be scalarized. |
| 5636 | // TODO - do we have any exceptions? |
| 5637 | if (Opc >= ISD::BUILTIN_OP_END) |
| 5638 | return false; |
| 5639 | |
| 5640 | // If the vector op is not supported, try to convert to scalar. |
| 5641 | EVT VecVT = VecOp.getValueType(); |
| 5642 | if (!isOperationLegalOrCustomOrPromote(Opc, VecVT)) |
| 5643 | return true; |
| 5644 | |
| 5645 | // If the vector op is supported, but the scalar op is not, the transform may |
| 5646 | // not be worthwhile. |
| 5647 | EVT ScalarVT = VecVT.getScalarType(); |
| 5648 | return isOperationLegalOrCustomOrPromote(Opc, ScalarVT); |
| 5649 | } |
| 5650 | |
| 5651 | bool X86TargetLowering::shouldFormOverflowOp(unsigned Opcode, EVT VT, |
| 5652 | bool) const { |
| 5653 | // TODO: Allow vectors? |
| 5654 | if (VT.isVector()) |
| 5655 | return false; |
| 5656 | return VT.isSimple() || !isOperationExpand(Opcode, VT); |
| 5657 | } |
| 5658 | |
| 5659 | bool X86TargetLowering::isCheapToSpeculateCttz() const { |
| 5660 | // Speculate cttz only if we can directly use TZCNT. |
| 5661 | return Subtarget.hasBMI(); |
| 5662 | } |
| 5663 | |
| 5664 | bool X86TargetLowering::isCheapToSpeculateCtlz() const { |
| 5665 | // Speculate ctlz only if we can directly use LZCNT. |
| 5666 | return Subtarget.hasLZCNT(); |
| 5667 | } |
| 5668 | |
| 5669 | bool X86TargetLowering::hasBitPreservingFPLogic(EVT VT) const { |
| 5670 | return VT == MVT::f32 || VT == MVT::f64 || VT.isVector() || |
| 5671 | (VT == MVT::f16 && Subtarget.hasFP16()); |
| 5672 | } |
| 5673 | |
| 5674 | bool X86TargetLowering::ShouldShrinkFPConstant(EVT VT) const { |
| 5675 | // Don't shrink FP constpool if SSE2 is available since cvtss2sd is more |
| 5676 | // expensive than a straight movsd. On the other hand, it's important to |
| 5677 | // shrink long double fp constant since fldt is very slow. |
| 5678 | return !Subtarget.hasSSE2() || VT == MVT::f80; |
| 5679 | } |
| 5680 | |
| 5681 | bool X86TargetLowering::isScalarFPTypeInSSEReg(EVT VT) const { |
| 5682 | return (VT == MVT::f64 && Subtarget.hasSSE2()) || |
| 5683 | (VT == MVT::f32 && Subtarget.hasSSE1()) || |
| 5684 | (VT == MVT::f16 && Subtarget.hasFP16()); |
| 5685 | } |
| 5686 | |
| 5687 | bool X86TargetLowering::isLoadBitCastBeneficial(EVT LoadVT, EVT BitcastVT, |
| 5688 | const SelectionDAG &DAG, |
| 5689 | const MachineMemOperand &MMO) const { |
| 5690 | if (!Subtarget.hasAVX512() && !LoadVT.isVector() && BitcastVT.isVector() && |
| 5691 | BitcastVT.getVectorElementType() == MVT::i1) |
| 5692 | return false; |
| 5693 | |
| 5694 | if (!Subtarget.hasDQI() && BitcastVT == MVT::v8i1 && LoadVT == MVT::i8) |
| 5695 | return false; |
| 5696 | |
| 5697 | // If both types are legal vectors, it's always ok to convert them. |
| 5698 | if (LoadVT.isVector() && BitcastVT.isVector() && |
| 5699 | isTypeLegal(LoadVT) && isTypeLegal(BitcastVT)) |
| 5700 | return true; |
| 5701 | |
| 5702 | return TargetLowering::isLoadBitCastBeneficial(LoadVT, BitcastVT, DAG, MMO); |
| 5703 | } |
| 5704 | |
| 5705 | bool X86TargetLowering::canMergeStoresTo(unsigned AddressSpace, EVT MemVT, |
| 5706 | const MachineFunction &MF) const { |
| 5707 | // Do not merge to float value size (128 bytes) if no implicit |
| 5708 | // float attribute is set. |
| 5709 | bool NoFloat = MF.getFunction().hasFnAttribute(Attribute::NoImplicitFloat); |
| 5710 | |
| 5711 | if (NoFloat) { |
| 5712 | unsigned MaxIntSize = Subtarget.is64Bit() ? 64 : 32; |
| 5713 | return (MemVT.getSizeInBits() <= MaxIntSize); |
| 5714 | } |
| 5715 | // Make sure we don't merge greater than our preferred vector |
| 5716 | // width. |
| 5717 | if (MemVT.getSizeInBits() > Subtarget.getPreferVectorWidth()) |
| 5718 | return false; |
| 5719 | |
| 5720 | return true; |
| 5721 | } |
| 5722 | |
| 5723 | bool X86TargetLowering::isCtlzFast() const { |
| 5724 | return Subtarget.hasFastLZCNT(); |
| 5725 | } |
| 5726 | |
| 5727 | bool X86TargetLowering::isMaskAndCmp0FoldingBeneficial( |
| 5728 | const Instruction &AndI) const { |
| 5729 | return true; |
| 5730 | } |
| 5731 | |
| 5732 | bool X86TargetLowering::hasAndNotCompare(SDValue Y) const { |
| 5733 | EVT VT = Y.getValueType(); |
| 5734 | |
| 5735 | if (VT.isVector()) |
| 5736 | return false; |
| 5737 | |
| 5738 | if (!Subtarget.hasBMI()) |
| 5739 | return false; |
| 5740 | |
| 5741 | // There are only 32-bit and 64-bit forms for 'andn'. |
| 5742 | if (VT != MVT::i32 && VT != MVT::i64) |
| 5743 | return false; |
| 5744 | |
| 5745 | return !isa<ConstantSDNode>(Y); |
| 5746 | } |
| 5747 | |
| 5748 | bool X86TargetLowering::hasAndNot(SDValue Y) const { |
| 5749 | EVT VT = Y.getValueType(); |
| 5750 | |
| 5751 | if (!VT.isVector()) |
| 5752 | return hasAndNotCompare(Y); |
| 5753 | |
| 5754 | // Vector. |
| 5755 | |
| 5756 | if (!Subtarget.hasSSE1() || VT.getSizeInBits() < 128) |
| 5757 | return false; |
| 5758 | |
| 5759 | if (VT == MVT::v4i32) |
| 5760 | return true; |
| 5761 | |
| 5762 | return Subtarget.hasSSE2(); |
| 5763 | } |
| 5764 | |
| 5765 | bool X86TargetLowering::hasBitTest(SDValue X, SDValue Y) const { |
| 5766 | return X.getValueType().isScalarInteger(); // 'bt' |
| 5767 | } |
| 5768 | |
| 5769 | bool X86TargetLowering:: |
| 5770 | shouldProduceAndByConstByHoistingConstFromShiftsLHSOfAnd( |
| 5771 | SDValue X, ConstantSDNode *XC, ConstantSDNode *CC, SDValue Y, |
| 5772 | unsigned OldShiftOpcode, unsigned NewShiftOpcode, |
| 5773 | SelectionDAG &DAG) const { |
| 5774 | // Does baseline recommend not to perform the fold by default? |
| 5775 | if (!TargetLowering::shouldProduceAndByConstByHoistingConstFromShiftsLHSOfAnd( |
| 5776 | X, XC, CC, Y, OldShiftOpcode, NewShiftOpcode, DAG)) |
| 5777 | return false; |
| 5778 | // For scalars this transform is always beneficial. |
| 5779 | if (X.getValueType().isScalarInteger()) |
| 5780 | return true; |
| 5781 | // If all the shift amounts are identical, then transform is beneficial even |
| 5782 | // with rudimentary SSE2 shifts. |
| 5783 | if (DAG.isSplatValue(Y, /*AllowUndefs=*/true)) |
| 5784 | return true; |
| 5785 | // If we have AVX2 with it's powerful shift operations, then it's also good. |
| 5786 | if (Subtarget.hasAVX2()) |
| 5787 | return true; |
| 5788 | // Pre-AVX2 vector codegen for this pattern is best for variant with 'shl'. |
| 5789 | return NewShiftOpcode == ISD::SHL; |
| 5790 | } |
| 5791 | |
| 5792 | bool X86TargetLowering::shouldFoldConstantShiftPairToMask( |
| 5793 | const SDNode *N, CombineLevel Level) const { |
| 5794 | assert(((N->getOpcode() == ISD::SHL &&(static_cast <bool> (((N->getOpcode() == ISD::SHL && N->getOperand(0).getOpcode() == ISD::SRL) || (N->getOpcode () == ISD::SRL && N->getOperand(0).getOpcode() == ISD ::SHL)) && "Expected shift-shift mask") ? void (0) : __assert_fail ("((N->getOpcode() == ISD::SHL && N->getOperand(0).getOpcode() == ISD::SRL) || (N->getOpcode() == ISD::SRL && N->getOperand(0).getOpcode() == ISD::SHL)) && \"Expected shift-shift mask\"" , "llvm/lib/Target/X86/X86ISelLowering.cpp", 5798, __extension__ __PRETTY_FUNCTION__)) |
| 5795 | N->getOperand(0).getOpcode() == ISD::SRL) ||(static_cast <bool> (((N->getOpcode() == ISD::SHL && N->getOperand(0).getOpcode() == ISD::SRL) || (N->getOpcode () == ISD::SRL && N->getOperand(0).getOpcode() == ISD ::SHL)) && "Expected shift-shift mask") ? void (0) : __assert_fail ("((N->getOpcode() == ISD::SHL && N->getOperand(0).getOpcode() == ISD::SRL) || (N->getOpcode() == ISD::SRL && N->getOperand(0).getOpcode() == ISD::SHL)) && \"Expected shift-shift mask\"" , "llvm/lib/Target/X86/X86ISelLowering.cpp", 5798, __extension__ __PRETTY_FUNCTION__)) |
| 5796 | (N->getOpcode() == ISD::SRL &&(static_cast <bool> (((N->getOpcode() == ISD::SHL && N->getOperand(0).getOpcode() == ISD::SRL) || (N->getOpcode () == ISD::SRL && N->getOperand(0).getOpcode() == ISD ::SHL)) && "Expected shift-shift mask") ? void (0) : __assert_fail ("((N->getOpcode() == ISD::SHL && N->getOperand(0).getOpcode() == ISD::SRL) || (N->getOpcode() == ISD::SRL && N->getOperand(0).getOpcode() == ISD::SHL)) && \"Expected shift-shift mask\"" , "llvm/lib/Target/X86/X86ISelLowering.cpp", 5798, __extension__ __PRETTY_FUNCTION__)) |
| 5797 | N->getOperand(0).getOpcode() == ISD::SHL)) &&(static_cast <bool> (((N->getOpcode() == ISD::SHL && N->getOperand(0).getOpcode() == ISD::SRL) || (N->getOpcode () == ISD::SRL && N->getOperand(0).getOpcode() == ISD ::SHL)) && "Expected shift-shift mask") ? void (0) : __assert_fail ("((N->getOpcode() == ISD::SHL && N->getOperand(0).getOpcode() == ISD::SRL) || (N->getOpcode() == ISD::SRL && N->getOperand(0).getOpcode() == ISD::SHL)) && \"Expected shift-shift mask\"" , "llvm/lib/Target/X86/X86ISelLowering.cpp", 5798, __extension__ __PRETTY_FUNCTION__)) |
| 5798 | "Expected shift-shift mask")(static_cast <bool> (((N->getOpcode() == ISD::SHL && N->getOperand(0).getOpcode() == ISD::SRL) || (N->getOpcode () == ISD::SRL && N->getOperand(0).getOpcode() == ISD ::SHL)) && "Expected shift-shift mask") ? void (0) : __assert_fail ("((N->getOpcode() == ISD::SHL && N->getOperand(0).getOpcode() == ISD::SRL) || (N->getOpcode() == ISD::SRL && N->getOperand(0).getOpcode() == ISD::SHL)) && \"Expected shift-shift mask\"" , "llvm/lib/Target/X86/X86ISelLowering.cpp", 5798, __extension__ __PRETTY_FUNCTION__)); |
| 5799 | EVT VT = N->getValueType(0); |
| 5800 | if ((Subtarget.hasFastVectorShiftMasks() && VT.isVector()) || |
| 5801 | (Subtarget.hasFastScalarShiftMasks() && !VT.isVector())) { |
| 5802 | // Only fold if the shift values are equal - so it folds to AND. |
| 5803 | // TODO - we should fold if either is a non-uniform vector but we don't do |
| 5804 | // the fold for non-splats yet. |
| 5805 | return N->getOperand(1) == N->getOperand(0).getOperand(1); |
| 5806 | } |
| 5807 | return TargetLoweringBase::shouldFoldConstantShiftPairToMask(N, Level); |
| 5808 | } |
| 5809 | |
| 5810 | bool X86TargetLowering::shouldFoldMaskToVariableShiftPair(SDValue Y) const { |
| 5811 | EVT VT = Y.getValueType(); |
| 5812 | |
| 5813 | // For vectors, we don't have a preference, but we probably want a mask. |
| 5814 | if (VT.isVector()) |
| 5815 | return false; |
| 5816 | |
| 5817 | // 64-bit shifts on 32-bit targets produce really bad bloated code. |
| 5818 | if (VT == MVT::i64 && !Subtarget.is64Bit()) |
| 5819 | return false; |
| 5820 | |
| 5821 | return true; |
| 5822 | } |
| 5823 | |
| 5824 | bool X86TargetLowering::shouldExpandShift(SelectionDAG &DAG, |
| 5825 | SDNode *N) const { |
| 5826 | if (DAG.getMachineFunction().getFunction().hasMinSize() && |
| 5827 | !Subtarget.isOSWindows()) |
| 5828 | return false; |
| 5829 | return true; |
| 5830 | } |
| 5831 | |
| 5832 | bool X86TargetLowering::shouldSplatInsEltVarIndex(EVT VT) const { |
| 5833 | // Any legal vector type can be splatted more efficiently than |
| 5834 | // loading/spilling from memory. |
| 5835 | return isTypeLegal(VT); |
| 5836 | } |
| 5837 | |
| 5838 | MVT X86TargetLowering::hasFastEqualityCompare(unsigned NumBits) const { |
| 5839 | MVT VT = MVT::getIntegerVT(NumBits); |
| 5840 | if (isTypeLegal(VT)) |
| 5841 | return VT; |
| 5842 | |
| 5843 | // PMOVMSKB can handle this. |
| 5844 | if (NumBits == 128 && isTypeLegal(MVT::v16i8)) |
| 5845 | return MVT::v16i8; |
| 5846 | |
| 5847 | // VPMOVMSKB can handle this. |
| 5848 | if (NumBits == 256 && isTypeLegal(MVT::v32i8)) |
| 5849 | return MVT::v32i8; |
| 5850 | |
| 5851 | // TODO: Allow 64-bit type for 32-bit target. |
| 5852 | // TODO: 512-bit types should be allowed, but make sure that those |
| 5853 | // cases are handled in combineVectorSizedSetCCEquality(). |
| 5854 | |
| 5855 | return MVT::INVALID_SIMPLE_VALUE_TYPE; |
| 5856 | } |
| 5857 | |
| 5858 | /// Val is the undef sentinel value or equal to the specified value. |
| 5859 | static bool isUndefOrEqual(int Val, int CmpVal) { |
| 5860 | return ((Val == SM_SentinelUndef) || (Val == CmpVal)); |
| 5861 | } |
| 5862 | |
| 5863 | /// Return true if every element in Mask is the undef sentinel value or equal to |
| 5864 | /// the specified value.. |
| 5865 | static bool isUndefOrEqual(ArrayRef<int> Mask, int CmpVal) { |
| 5866 | return llvm::all_of(Mask, [CmpVal](int M) { |
| 5867 | return (M == SM_SentinelUndef) || (M == CmpVal); |
| 5868 | }); |
| 5869 | } |
| 5870 | |
| 5871 | /// Val is either the undef or zero sentinel value. |
| 5872 | static bool isUndefOrZero(int Val) { |
| 5873 | return ((Val == SM_SentinelUndef) || (Val == SM_SentinelZero)); |
| 5874 | } |
| 5875 | |
| 5876 | /// Return true if every element in Mask, beginning from position Pos and ending |
| 5877 | /// in Pos+Size is the undef sentinel value. |
| 5878 | static bool isUndefInRange(ArrayRef<int> Mask, unsigned Pos, unsigned Size) { |
| 5879 | return llvm::all_of(Mask.slice(Pos, Size), |
| 5880 | [](int M) { return M == SM_SentinelUndef; }); |
| 5881 | } |
| 5882 | |
| 5883 | /// Return true if the mask creates a vector whose lower half is undefined. |
| 5884 | static bool isUndefLowerHalf(ArrayRef<int> Mask) { |
| 5885 | unsigned NumElts = Mask.size(); |
| 5886 | return isUndefInRange(Mask, 0, NumElts / 2); |
| 5887 | } |
| 5888 | |
| 5889 | /// Return true if the mask creates a vector whose upper half is undefined. |
| 5890 | static bool isUndefUpperHalf(ArrayRef<int> Mask) { |
| 5891 | unsigned NumElts = Mask.size(); |
| 5892 | return isUndefInRange(Mask, NumElts / 2, NumElts / 2); |
| 5893 | } |
| 5894 | |
| 5895 | /// Return true if Val falls within the specified range (L, H]. |
| 5896 | static bool isInRange(int Val, int Low, int Hi) { |
| 5897 | return (Val >= Low && Val < Hi); |
| 5898 | } |
| 5899 | |
| 5900 | /// Return true if the value of any element in Mask falls within the specified |
| 5901 | /// range (L, H]. |
| 5902 | static bool isAnyInRange(ArrayRef<int> Mask, int Low, int Hi) { |
| 5903 | return llvm::any_of(Mask, [Low, Hi](int M) { return isInRange(M, Low, Hi); }); |
| 5904 | } |
| 5905 | |
| 5906 | /// Return true if the value of any element in Mask is the zero sentinel value. |
| 5907 | static bool isAnyZero(ArrayRef<int> Mask) { |
| 5908 | return llvm::any_of(Mask, [](int M) { return M == SM_SentinelZero; }); |
| 5909 | } |
| 5910 | |
| 5911 | /// Return true if the value of any element in Mask is the zero or undef |
| 5912 | /// sentinel values. |
| 5913 | static bool isAnyZeroOrUndef(ArrayRef<int> Mask) { |
| 5914 | return llvm::any_of(Mask, [](int M) { |
| 5915 | return M == SM_SentinelZero || M == SM_SentinelUndef; |
| 5916 | }); |
| 5917 | } |