File: | lib/Target/AArch64/AArch64FastISel.cpp |
Warning: | line 4860, column 32 The result of the left shift is undefined due to shifting by '64', which is greater or equal to the width of type 'unsigned long long' |
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1 | //===- AArch6464FastISel.cpp - AArch64 FastISel implementation ------------===// | |||
2 | // | |||
3 | // The LLVM Compiler Infrastructure | |||
4 | // | |||
5 | // This file is distributed under the University of Illinois Open Source | |||
6 | // License. See LICENSE.TXT for details. | |||
7 | // | |||
8 | //===----------------------------------------------------------------------===// | |||
9 | // | |||
10 | // This file defines the AArch64-specific support for the FastISel class. Some | |||
11 | // of the target-specific code is generated by tablegen in the file | |||
12 | // AArch64GenFastISel.inc, which is #included here. | |||
13 | // | |||
14 | //===----------------------------------------------------------------------===// | |||
15 | ||||
16 | #include "AArch64.h" | |||
17 | #include "AArch64CallingConvention.h" | |||
18 | #include "AArch64RegisterInfo.h" | |||
19 | #include "AArch64Subtarget.h" | |||
20 | #include "MCTargetDesc/AArch64AddressingModes.h" | |||
21 | #include "Utils/AArch64BaseInfo.h" | |||
22 | #include "llvm/ADT/APFloat.h" | |||
23 | #include "llvm/ADT/APInt.h" | |||
24 | #include "llvm/ADT/DenseMap.h" | |||
25 | #include "llvm/ADT/SmallVector.h" | |||
26 | #include "llvm/Analysis/BranchProbabilityInfo.h" | |||
27 | #include "llvm/CodeGen/CallingConvLower.h" | |||
28 | #include "llvm/CodeGen/FastISel.h" | |||
29 | #include "llvm/CodeGen/FunctionLoweringInfo.h" | |||
30 | #include "llvm/CodeGen/ISDOpcodes.h" | |||
31 | #include "llvm/CodeGen/MachineBasicBlock.h" | |||
32 | #include "llvm/CodeGen/MachineConstantPool.h" | |||
33 | #include "llvm/CodeGen/MachineFrameInfo.h" | |||
34 | #include "llvm/CodeGen/MachineInstr.h" | |||
35 | #include "llvm/CodeGen/MachineInstrBuilder.h" | |||
36 | #include "llvm/CodeGen/MachineMemOperand.h" | |||
37 | #include "llvm/CodeGen/MachineRegisterInfo.h" | |||
38 | #include "llvm/CodeGen/MachineValueType.h" | |||
39 | #include "llvm/CodeGen/RuntimeLibcalls.h" | |||
40 | #include "llvm/CodeGen/ValueTypes.h" | |||
41 | #include "llvm/IR/Argument.h" | |||
42 | #include "llvm/IR/Attributes.h" | |||
43 | #include "llvm/IR/BasicBlock.h" | |||
44 | #include "llvm/IR/CallingConv.h" | |||
45 | #include "llvm/IR/Constant.h" | |||
46 | #include "llvm/IR/Constants.h" | |||
47 | #include "llvm/IR/DataLayout.h" | |||
48 | #include "llvm/IR/DerivedTypes.h" | |||
49 | #include "llvm/IR/Function.h" | |||
50 | #include "llvm/IR/GetElementPtrTypeIterator.h" | |||
51 | #include "llvm/IR/GlobalValue.h" | |||
52 | #include "llvm/IR/InstrTypes.h" | |||
53 | #include "llvm/IR/Instruction.h" | |||
54 | #include "llvm/IR/Instructions.h" | |||
55 | #include "llvm/IR/IntrinsicInst.h" | |||
56 | #include "llvm/IR/Intrinsics.h" | |||
57 | #include "llvm/IR/Operator.h" | |||
58 | #include "llvm/IR/Type.h" | |||
59 | #include "llvm/IR/User.h" | |||
60 | #include "llvm/IR/Value.h" | |||
61 | #include "llvm/MC/MCInstrDesc.h" | |||
62 | #include "llvm/MC/MCRegisterInfo.h" | |||
63 | #include "llvm/MC/MCSymbol.h" | |||
64 | #include "llvm/Support/AtomicOrdering.h" | |||
65 | #include "llvm/Support/Casting.h" | |||
66 | #include "llvm/Support/CodeGen.h" | |||
67 | #include "llvm/Support/Compiler.h" | |||
68 | #include "llvm/Support/ErrorHandling.h" | |||
69 | #include "llvm/Support/MathExtras.h" | |||
70 | #include <algorithm> | |||
71 | #include <cassert> | |||
72 | #include <cstdint> | |||
73 | #include <iterator> | |||
74 | #include <utility> | |||
75 | ||||
76 | using namespace llvm; | |||
77 | ||||
78 | namespace { | |||
79 | ||||
80 | class AArch64FastISel final : public FastISel { | |||
81 | class Address { | |||
82 | public: | |||
83 | using BaseKind = enum { | |||
84 | RegBase, | |||
85 | FrameIndexBase | |||
86 | }; | |||
87 | ||||
88 | private: | |||
89 | BaseKind Kind = RegBase; | |||
90 | AArch64_AM::ShiftExtendType ExtType = AArch64_AM::InvalidShiftExtend; | |||
91 | union { | |||
92 | unsigned Reg; | |||
93 | int FI; | |||
94 | } Base; | |||
95 | unsigned OffsetReg = 0; | |||
96 | unsigned Shift = 0; | |||
97 | int64_t Offset = 0; | |||
98 | const GlobalValue *GV = nullptr; | |||
99 | ||||
100 | public: | |||
101 | Address() { Base.Reg = 0; } | |||
102 | ||||
103 | void setKind(BaseKind K) { Kind = K; } | |||
104 | BaseKind getKind() const { return Kind; } | |||
105 | void setExtendType(AArch64_AM::ShiftExtendType E) { ExtType = E; } | |||
106 | AArch64_AM::ShiftExtendType getExtendType() const { return ExtType; } | |||
107 | bool isRegBase() const { return Kind == RegBase; } | |||
108 | bool isFIBase() const { return Kind == FrameIndexBase; } | |||
109 | ||||
110 | void setReg(unsigned Reg) { | |||
111 | assert(isRegBase() && "Invalid base register access!")(static_cast <bool> (isRegBase() && "Invalid base register access!" ) ? void (0) : __assert_fail ("isRegBase() && \"Invalid base register access!\"" , "/build/llvm-toolchain-snapshot-7~svn326246/lib/Target/AArch64/AArch64FastISel.cpp" , 111, __extension__ __PRETTY_FUNCTION__)); | |||
112 | Base.Reg = Reg; | |||
113 | } | |||
114 | ||||
115 | unsigned getReg() const { | |||
116 | assert(isRegBase() && "Invalid base register access!")(static_cast <bool> (isRegBase() && "Invalid base register access!" ) ? void (0) : __assert_fail ("isRegBase() && \"Invalid base register access!\"" , "/build/llvm-toolchain-snapshot-7~svn326246/lib/Target/AArch64/AArch64FastISel.cpp" , 116, __extension__ __PRETTY_FUNCTION__)); | |||
117 | return Base.Reg; | |||
118 | } | |||
119 | ||||
120 | void setOffsetReg(unsigned Reg) { | |||
121 | OffsetReg = Reg; | |||
122 | } | |||
123 | ||||
124 | unsigned getOffsetReg() const { | |||
125 | return OffsetReg; | |||
126 | } | |||
127 | ||||
128 | void setFI(unsigned FI) { | |||
129 | assert(isFIBase() && "Invalid base frame index access!")(static_cast <bool> (isFIBase() && "Invalid base frame index access!" ) ? void (0) : __assert_fail ("isFIBase() && \"Invalid base frame index access!\"" , "/build/llvm-toolchain-snapshot-7~svn326246/lib/Target/AArch64/AArch64FastISel.cpp" , 129, __extension__ __PRETTY_FUNCTION__)); | |||
130 | Base.FI = FI; | |||
131 | } | |||
132 | ||||
133 | unsigned getFI() const { | |||
134 | assert(isFIBase() && "Invalid base frame index access!")(static_cast <bool> (isFIBase() && "Invalid base frame index access!" ) ? void (0) : __assert_fail ("isFIBase() && \"Invalid base frame index access!\"" , "/build/llvm-toolchain-snapshot-7~svn326246/lib/Target/AArch64/AArch64FastISel.cpp" , 134, __extension__ __PRETTY_FUNCTION__)); | |||
135 | return Base.FI; | |||
136 | } | |||
137 | ||||
138 | void setOffset(int64_t O) { Offset = O; } | |||
139 | int64_t getOffset() { return Offset; } | |||
140 | void setShift(unsigned S) { Shift = S; } | |||
141 | unsigned getShift() { return Shift; } | |||
142 | ||||
143 | void setGlobalValue(const GlobalValue *G) { GV = G; } | |||
144 | const GlobalValue *getGlobalValue() { return GV; } | |||
145 | }; | |||
146 | ||||
147 | /// Subtarget - Keep a pointer to the AArch64Subtarget around so that we can | |||
148 | /// make the right decision when generating code for different targets. | |||
149 | const AArch64Subtarget *Subtarget; | |||
150 | LLVMContext *Context; | |||
151 | ||||
152 | bool fastLowerArguments() override; | |||
153 | bool fastLowerCall(CallLoweringInfo &CLI) override; | |||
154 | bool fastLowerIntrinsicCall(const IntrinsicInst *II) override; | |||
155 | ||||
156 | private: | |||
157 | // Selection routines. | |||
158 | bool selectAddSub(const Instruction *I); | |||
159 | bool selectLogicalOp(const Instruction *I); | |||
160 | bool selectLoad(const Instruction *I); | |||
161 | bool selectStore(const Instruction *I); | |||
162 | bool selectBranch(const Instruction *I); | |||
163 | bool selectIndirectBr(const Instruction *I); | |||
164 | bool selectCmp(const Instruction *I); | |||
165 | bool selectSelect(const Instruction *I); | |||
166 | bool selectFPExt(const Instruction *I); | |||
167 | bool selectFPTrunc(const Instruction *I); | |||
168 | bool selectFPToInt(const Instruction *I, bool Signed); | |||
169 | bool selectIntToFP(const Instruction *I, bool Signed); | |||
170 | bool selectRem(const Instruction *I, unsigned ISDOpcode); | |||
171 | bool selectRet(const Instruction *I); | |||
172 | bool selectTrunc(const Instruction *I); | |||
173 | bool selectIntExt(const Instruction *I); | |||
174 | bool selectMul(const Instruction *I); | |||
175 | bool selectShift(const Instruction *I); | |||
176 | bool selectBitCast(const Instruction *I); | |||
177 | bool selectFRem(const Instruction *I); | |||
178 | bool selectSDiv(const Instruction *I); | |||
179 | bool selectGetElementPtr(const Instruction *I); | |||
180 | bool selectAtomicCmpXchg(const AtomicCmpXchgInst *I); | |||
181 | ||||
182 | // Utility helper routines. | |||
183 | bool isTypeLegal(Type *Ty, MVT &VT); | |||
184 | bool isTypeSupported(Type *Ty, MVT &VT, bool IsVectorAllowed = false); | |||
185 | bool isValueAvailable(const Value *V) const; | |||
186 | bool computeAddress(const Value *Obj, Address &Addr, Type *Ty = nullptr); | |||
187 | bool computeCallAddress(const Value *V, Address &Addr); | |||
188 | bool simplifyAddress(Address &Addr, MVT VT); | |||
189 | void addLoadStoreOperands(Address &Addr, const MachineInstrBuilder &MIB, | |||
190 | MachineMemOperand::Flags Flags, | |||
191 | unsigned ScaleFactor, MachineMemOperand *MMO); | |||
192 | bool isMemCpySmall(uint64_t Len, unsigned Alignment); | |||
193 | bool tryEmitSmallMemCpy(Address Dest, Address Src, uint64_t Len, | |||
194 | unsigned Alignment); | |||
195 | bool foldXALUIntrinsic(AArch64CC::CondCode &CC, const Instruction *I, | |||
196 | const Value *Cond); | |||
197 | bool optimizeIntExtLoad(const Instruction *I, MVT RetVT, MVT SrcVT); | |||
198 | bool optimizeSelect(const SelectInst *SI); | |||
199 | std::pair<unsigned, bool> getRegForGEPIndex(const Value *Idx); | |||
200 | ||||
201 | // Emit helper routines. | |||
202 | unsigned emitAddSub(bool UseAdd, MVT RetVT, const Value *LHS, | |||
203 | const Value *RHS, bool SetFlags = false, | |||
204 | bool WantResult = true, bool IsZExt = false); | |||
205 | unsigned emitAddSub_rr(bool UseAdd, MVT RetVT, unsigned LHSReg, | |||
206 | bool LHSIsKill, unsigned RHSReg, bool RHSIsKill, | |||
207 | bool SetFlags = false, bool WantResult = true); | |||
208 | unsigned emitAddSub_ri(bool UseAdd, MVT RetVT, unsigned LHSReg, | |||
209 | bool LHSIsKill, uint64_t Imm, bool SetFlags = false, | |||
210 | bool WantResult = true); | |||
211 | unsigned emitAddSub_rs(bool UseAdd, MVT RetVT, unsigned LHSReg, | |||
212 | bool LHSIsKill, unsigned RHSReg, bool RHSIsKill, | |||
213 | AArch64_AM::ShiftExtendType ShiftType, | |||
214 | uint64_t ShiftImm, bool SetFlags = false, | |||
215 | bool WantResult = true); | |||
216 | unsigned emitAddSub_rx(bool UseAdd, MVT RetVT, unsigned LHSReg, | |||
217 | bool LHSIsKill, unsigned RHSReg, bool RHSIsKill, | |||
218 | AArch64_AM::ShiftExtendType ExtType, | |||
219 | uint64_t ShiftImm, bool SetFlags = false, | |||
220 | bool WantResult = true); | |||
221 | ||||
222 | // Emit functions. | |||
223 | bool emitCompareAndBranch(const BranchInst *BI); | |||
224 | bool emitCmp(const Value *LHS, const Value *RHS, bool IsZExt); | |||
225 | bool emitICmp(MVT RetVT, const Value *LHS, const Value *RHS, bool IsZExt); | |||
226 | bool emitICmp_ri(MVT RetVT, unsigned LHSReg, bool LHSIsKill, uint64_t Imm); | |||
227 | bool emitFCmp(MVT RetVT, const Value *LHS, const Value *RHS); | |||
228 | unsigned emitLoad(MVT VT, MVT ResultVT, Address Addr, bool WantZExt = true, | |||
229 | MachineMemOperand *MMO = nullptr); | |||
230 | bool emitStore(MVT VT, unsigned SrcReg, Address Addr, | |||
231 | MachineMemOperand *MMO = nullptr); | |||
232 | bool emitStoreRelease(MVT VT, unsigned SrcReg, unsigned AddrReg, | |||
233 | MachineMemOperand *MMO = nullptr); | |||
234 | unsigned emitIntExt(MVT SrcVT, unsigned SrcReg, MVT DestVT, bool isZExt); | |||
235 | unsigned emiti1Ext(unsigned SrcReg, MVT DestVT, bool isZExt); | |||
236 | unsigned emitAdd(MVT RetVT, const Value *LHS, const Value *RHS, | |||
237 | bool SetFlags = false, bool WantResult = true, | |||
238 | bool IsZExt = false); | |||
239 | unsigned emitAdd_ri_(MVT VT, unsigned Op0, bool Op0IsKill, int64_t Imm); | |||
240 | unsigned emitSub(MVT RetVT, const Value *LHS, const Value *RHS, | |||
241 | bool SetFlags = false, bool WantResult = true, | |||
242 | bool IsZExt = false); | |||
243 | unsigned emitSubs_rr(MVT RetVT, unsigned LHSReg, bool LHSIsKill, | |||
244 | unsigned RHSReg, bool RHSIsKill, bool WantResult = true); | |||
245 | unsigned emitSubs_rs(MVT RetVT, unsigned LHSReg, bool LHSIsKill, | |||
246 | unsigned RHSReg, bool RHSIsKill, | |||
247 | AArch64_AM::ShiftExtendType ShiftType, uint64_t ShiftImm, | |||
248 | bool WantResult = true); | |||
249 | unsigned emitLogicalOp(unsigned ISDOpc, MVT RetVT, const Value *LHS, | |||
250 | const Value *RHS); | |||
251 | unsigned emitLogicalOp_ri(unsigned ISDOpc, MVT RetVT, unsigned LHSReg, | |||
252 | bool LHSIsKill, uint64_t Imm); | |||
253 | unsigned emitLogicalOp_rs(unsigned ISDOpc, MVT RetVT, unsigned LHSReg, | |||
254 | bool LHSIsKill, unsigned RHSReg, bool RHSIsKill, | |||
255 | uint64_t ShiftImm); | |||
256 | unsigned emitAnd_ri(MVT RetVT, unsigned LHSReg, bool LHSIsKill, uint64_t Imm); | |||
257 | unsigned emitMul_rr(MVT RetVT, unsigned Op0, bool Op0IsKill, | |||
258 | unsigned Op1, bool Op1IsKill); | |||
259 | unsigned emitSMULL_rr(MVT RetVT, unsigned Op0, bool Op0IsKill, | |||
260 | unsigned Op1, bool Op1IsKill); | |||
261 | unsigned emitUMULL_rr(MVT RetVT, unsigned Op0, bool Op0IsKill, | |||
262 | unsigned Op1, bool Op1IsKill); | |||
263 | unsigned emitLSL_rr(MVT RetVT, unsigned Op0Reg, bool Op0IsKill, | |||
264 | unsigned Op1Reg, bool Op1IsKill); | |||
265 | unsigned emitLSL_ri(MVT RetVT, MVT SrcVT, unsigned Op0Reg, bool Op0IsKill, | |||
266 | uint64_t Imm, bool IsZExt = true); | |||
267 | unsigned emitLSR_rr(MVT RetVT, unsigned Op0Reg, bool Op0IsKill, | |||
268 | unsigned Op1Reg, bool Op1IsKill); | |||
269 | unsigned emitLSR_ri(MVT RetVT, MVT SrcVT, unsigned Op0Reg, bool Op0IsKill, | |||
270 | uint64_t Imm, bool IsZExt = true); | |||
271 | unsigned emitASR_rr(MVT RetVT, unsigned Op0Reg, bool Op0IsKill, | |||
272 | unsigned Op1Reg, bool Op1IsKill); | |||
273 | unsigned emitASR_ri(MVT RetVT, MVT SrcVT, unsigned Op0Reg, bool Op0IsKill, | |||
274 | uint64_t Imm, bool IsZExt = false); | |||
275 | ||||
276 | unsigned materializeInt(const ConstantInt *CI, MVT VT); | |||
277 | unsigned materializeFP(const ConstantFP *CFP, MVT VT); | |||
278 | unsigned materializeGV(const GlobalValue *GV); | |||
279 | ||||
280 | // Call handling routines. | |||
281 | private: | |||
282 | CCAssignFn *CCAssignFnForCall(CallingConv::ID CC) const; | |||
283 | bool processCallArgs(CallLoweringInfo &CLI, SmallVectorImpl<MVT> &ArgVTs, | |||
284 | unsigned &NumBytes); | |||
285 | bool finishCall(CallLoweringInfo &CLI, MVT RetVT, unsigned NumBytes); | |||
286 | ||||
287 | public: | |||
288 | // Backend specific FastISel code. | |||
289 | unsigned fastMaterializeAlloca(const AllocaInst *AI) override; | |||
290 | unsigned fastMaterializeConstant(const Constant *C) override; | |||
291 | unsigned fastMaterializeFloatZero(const ConstantFP* CF) override; | |||
292 | ||||
293 | explicit AArch64FastISel(FunctionLoweringInfo &FuncInfo, | |||
294 | const TargetLibraryInfo *LibInfo) | |||
295 | : FastISel(FuncInfo, LibInfo, /*SkipTargetIndependentISel=*/true) { | |||
296 | Subtarget = | |||
297 | &static_cast<const AArch64Subtarget &>(FuncInfo.MF->getSubtarget()); | |||
298 | Context = &FuncInfo.Fn->getContext(); | |||
299 | } | |||
300 | ||||
301 | bool fastSelectInstruction(const Instruction *I) override; | |||
302 | ||||
303 | #include "AArch64GenFastISel.inc" | |||
304 | }; | |||
305 | ||||
306 | } // end anonymous namespace | |||
307 | ||||
308 | #include "AArch64GenCallingConv.inc" | |||
309 | ||||
310 | /// \brief Check if the sign-/zero-extend will be a noop. | |||
311 | static bool isIntExtFree(const Instruction *I) { | |||
312 | assert((isa<ZExtInst>(I) || isa<SExtInst>(I)) &&(static_cast <bool> ((isa<ZExtInst>(I) || isa< SExtInst>(I)) && "Unexpected integer extend instruction." ) ? void (0) : __assert_fail ("(isa<ZExtInst>(I) || isa<SExtInst>(I)) && \"Unexpected integer extend instruction.\"" , "/build/llvm-toolchain-snapshot-7~svn326246/lib/Target/AArch64/AArch64FastISel.cpp" , 313, __extension__ __PRETTY_FUNCTION__)) | |||
313 | "Unexpected integer extend instruction.")(static_cast <bool> ((isa<ZExtInst>(I) || isa< SExtInst>(I)) && "Unexpected integer extend instruction." ) ? void (0) : __assert_fail ("(isa<ZExtInst>(I) || isa<SExtInst>(I)) && \"Unexpected integer extend instruction.\"" , "/build/llvm-toolchain-snapshot-7~svn326246/lib/Target/AArch64/AArch64FastISel.cpp" , 313, __extension__ __PRETTY_FUNCTION__)); | |||
314 | assert(!I->getType()->isVectorTy() && I->getType()->isIntegerTy() &&(static_cast <bool> (!I->getType()->isVectorTy() && I->getType()->isIntegerTy() && "Unexpected value type." ) ? void (0) : __assert_fail ("!I->getType()->isVectorTy() && I->getType()->isIntegerTy() && \"Unexpected value type.\"" , "/build/llvm-toolchain-snapshot-7~svn326246/lib/Target/AArch64/AArch64FastISel.cpp" , 315, __extension__ __PRETTY_FUNCTION__)) | |||
315 | "Unexpected value type.")(static_cast <bool> (!I->getType()->isVectorTy() && I->getType()->isIntegerTy() && "Unexpected value type." ) ? void (0) : __assert_fail ("!I->getType()->isVectorTy() && I->getType()->isIntegerTy() && \"Unexpected value type.\"" , "/build/llvm-toolchain-snapshot-7~svn326246/lib/Target/AArch64/AArch64FastISel.cpp" , 315, __extension__ __PRETTY_FUNCTION__)); | |||
316 | bool IsZExt = isa<ZExtInst>(I); | |||
317 | ||||
318 | if (const auto *LI = dyn_cast<LoadInst>(I->getOperand(0))) | |||
319 | if (LI->hasOneUse()) | |||
320 | return true; | |||
321 | ||||
322 | if (const auto *Arg = dyn_cast<Argument>(I->getOperand(0))) | |||
323 | if ((IsZExt && Arg->hasZExtAttr()) || (!IsZExt && Arg->hasSExtAttr())) | |||
324 | return true; | |||
325 | ||||
326 | return false; | |||
327 | } | |||
328 | ||||
329 | /// \brief Determine the implicit scale factor that is applied by a memory | |||
330 | /// operation for a given value type. | |||
331 | static unsigned getImplicitScaleFactor(MVT VT) { | |||
332 | switch (VT.SimpleTy) { | |||
333 | default: | |||
334 | return 0; // invalid | |||
335 | case MVT::i1: // fall-through | |||
336 | case MVT::i8: | |||
337 | return 1; | |||
338 | case MVT::i16: | |||
339 | return 2; | |||
340 | case MVT::i32: // fall-through | |||
341 | case MVT::f32: | |||
342 | return 4; | |||
343 | case MVT::i64: // fall-through | |||
344 | case MVT::f64: | |||
345 | return 8; | |||
346 | } | |||
347 | } | |||
348 | ||||
349 | CCAssignFn *AArch64FastISel::CCAssignFnForCall(CallingConv::ID CC) const { | |||
350 | if (CC == CallingConv::WebKit_JS) | |||
351 | return CC_AArch64_WebKit_JS; | |||
352 | if (CC == CallingConv::GHC) | |||
353 | return CC_AArch64_GHC; | |||
354 | return Subtarget->isTargetDarwin() ? CC_AArch64_DarwinPCS : CC_AArch64_AAPCS; | |||
355 | } | |||
356 | ||||
357 | unsigned AArch64FastISel::fastMaterializeAlloca(const AllocaInst *AI) { | |||
358 | assert(TLI.getValueType(DL, AI->getType(), true) == MVT::i64 &&(static_cast <bool> (TLI.getValueType(DL, AI->getType (), true) == MVT::i64 && "Alloca should always return a pointer." ) ? void (0) : __assert_fail ("TLI.getValueType(DL, AI->getType(), true) == MVT::i64 && \"Alloca should always return a pointer.\"" , "/build/llvm-toolchain-snapshot-7~svn326246/lib/Target/AArch64/AArch64FastISel.cpp" , 359, __extension__ __PRETTY_FUNCTION__)) | |||
359 | "Alloca should always return a pointer.")(static_cast <bool> (TLI.getValueType(DL, AI->getType (), true) == MVT::i64 && "Alloca should always return a pointer." ) ? void (0) : __assert_fail ("TLI.getValueType(DL, AI->getType(), true) == MVT::i64 && \"Alloca should always return a pointer.\"" , "/build/llvm-toolchain-snapshot-7~svn326246/lib/Target/AArch64/AArch64FastISel.cpp" , 359, __extension__ __PRETTY_FUNCTION__)); | |||
360 | ||||
361 | // Don't handle dynamic allocas. | |||
362 | if (!FuncInfo.StaticAllocaMap.count(AI)) | |||
363 | return 0; | |||
364 | ||||
365 | DenseMap<const AllocaInst *, int>::iterator SI = | |||
366 | FuncInfo.StaticAllocaMap.find(AI); | |||
367 | ||||
368 | if (SI != FuncInfo.StaticAllocaMap.end()) { | |||
369 | unsigned ResultReg = createResultReg(&AArch64::GPR64spRegClass); | |||
370 | BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(AArch64::ADDXri), | |||
371 | ResultReg) | |||
372 | .addFrameIndex(SI->second) | |||
373 | .addImm(0) | |||
374 | .addImm(0); | |||
375 | return ResultReg; | |||
376 | } | |||
377 | ||||
378 | return 0; | |||
379 | } | |||
380 | ||||
381 | unsigned AArch64FastISel::materializeInt(const ConstantInt *CI, MVT VT) { | |||
382 | if (VT > MVT::i64) | |||
383 | return 0; | |||
384 | ||||
385 | if (!CI->isZero()) | |||
386 | return fastEmit_i(VT, VT, ISD::Constant, CI->getZExtValue()); | |||
387 | ||||
388 | // Create a copy from the zero register to materialize a "0" value. | |||
389 | const TargetRegisterClass *RC = (VT == MVT::i64) ? &AArch64::GPR64RegClass | |||
390 | : &AArch64::GPR32RegClass; | |||
391 | unsigned ZeroReg = (VT == MVT::i64) ? AArch64::XZR : AArch64::WZR; | |||
392 | unsigned ResultReg = createResultReg(RC); | |||
393 | BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(TargetOpcode::COPY), | |||
394 | ResultReg).addReg(ZeroReg, getKillRegState(true)); | |||
395 | return ResultReg; | |||
396 | } | |||
397 | ||||
398 | unsigned AArch64FastISel::materializeFP(const ConstantFP *CFP, MVT VT) { | |||
399 | // Positive zero (+0.0) has to be materialized with a fmov from the zero | |||
400 | // register, because the immediate version of fmov cannot encode zero. | |||
401 | if (CFP->isNullValue()) | |||
402 | return fastMaterializeFloatZero(CFP); | |||
403 | ||||
404 | if (VT != MVT::f32 && VT != MVT::f64) | |||
405 | return 0; | |||
406 | ||||
407 | const APFloat Val = CFP->getValueAPF(); | |||
408 | bool Is64Bit = (VT == MVT::f64); | |||
409 | // This checks to see if we can use FMOV instructions to materialize | |||
410 | // a constant, otherwise we have to materialize via the constant pool. | |||
411 | if (TLI.isFPImmLegal(Val, VT)) { | |||
412 | int Imm = | |||
413 | Is64Bit ? AArch64_AM::getFP64Imm(Val) : AArch64_AM::getFP32Imm(Val); | |||
414 | assert((Imm != -1) && "Cannot encode floating-point constant.")(static_cast <bool> ((Imm != -1) && "Cannot encode floating-point constant." ) ? void (0) : __assert_fail ("(Imm != -1) && \"Cannot encode floating-point constant.\"" , "/build/llvm-toolchain-snapshot-7~svn326246/lib/Target/AArch64/AArch64FastISel.cpp" , 414, __extension__ __PRETTY_FUNCTION__)); | |||
415 | unsigned Opc = Is64Bit ? AArch64::FMOVDi : AArch64::FMOVSi; | |||
416 | return fastEmitInst_i(Opc, TLI.getRegClassFor(VT), Imm); | |||
417 | } | |||
418 | ||||
419 | // For the MachO large code model materialize the FP constant in code. | |||
420 | if (Subtarget->isTargetMachO() && TM.getCodeModel() == CodeModel::Large) { | |||
421 | unsigned Opc1 = Is64Bit ? AArch64::MOVi64imm : AArch64::MOVi32imm; | |||
422 | const TargetRegisterClass *RC = Is64Bit ? | |||
423 | &AArch64::GPR64RegClass : &AArch64::GPR32RegClass; | |||
424 | ||||
425 | unsigned TmpReg = createResultReg(RC); | |||
426 | BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(Opc1), TmpReg) | |||
427 | .addImm(CFP->getValueAPF().bitcastToAPInt().getZExtValue()); | |||
428 | ||||
429 | unsigned ResultReg = createResultReg(TLI.getRegClassFor(VT)); | |||
430 | BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, | |||
431 | TII.get(TargetOpcode::COPY), ResultReg) | |||
432 | .addReg(TmpReg, getKillRegState(true)); | |||
433 | ||||
434 | return ResultReg; | |||
435 | } | |||
436 | ||||
437 | // Materialize via constant pool. MachineConstantPool wants an explicit | |||
438 | // alignment. | |||
439 | unsigned Align = DL.getPrefTypeAlignment(CFP->getType()); | |||
440 | if (Align == 0) | |||
441 | Align = DL.getTypeAllocSize(CFP->getType()); | |||
442 | ||||
443 | unsigned CPI = MCP.getConstantPoolIndex(cast<Constant>(CFP), Align); | |||
444 | unsigned ADRPReg = createResultReg(&AArch64::GPR64commonRegClass); | |||
445 | BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(AArch64::ADRP), | |||
446 | ADRPReg).addConstantPoolIndex(CPI, 0, AArch64II::MO_PAGE); | |||
447 | ||||
448 | unsigned Opc = Is64Bit ? AArch64::LDRDui : AArch64::LDRSui; | |||
449 | unsigned ResultReg = createResultReg(TLI.getRegClassFor(VT)); | |||
450 | BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(Opc), ResultReg) | |||
451 | .addReg(ADRPReg) | |||
452 | .addConstantPoolIndex(CPI, 0, AArch64II::MO_PAGEOFF | AArch64II::MO_NC); | |||
453 | return ResultReg; | |||
454 | } | |||
455 | ||||
456 | unsigned AArch64FastISel::materializeGV(const GlobalValue *GV) { | |||
457 | // We can't handle thread-local variables quickly yet. | |||
458 | if (GV->isThreadLocal()) | |||
459 | return 0; | |||
460 | ||||
461 | // MachO still uses GOT for large code-model accesses, but ELF requires | |||
462 | // movz/movk sequences, which FastISel doesn't handle yet. | |||
463 | if (!Subtarget->useSmallAddressing() && !Subtarget->isTargetMachO()) | |||
464 | return 0; | |||
465 | ||||
466 | unsigned char OpFlags = Subtarget->ClassifyGlobalReference(GV, TM); | |||
467 | ||||
468 | EVT DestEVT = TLI.getValueType(DL, GV->getType(), true); | |||
469 | if (!DestEVT.isSimple()) | |||
470 | return 0; | |||
471 | ||||
472 | unsigned ADRPReg = createResultReg(&AArch64::GPR64commonRegClass); | |||
473 | unsigned ResultReg; | |||
474 | ||||
475 | if (OpFlags & AArch64II::MO_GOT) { | |||
476 | // ADRP + LDRX | |||
477 | BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(AArch64::ADRP), | |||
478 | ADRPReg) | |||
479 | .addGlobalAddress(GV, 0, AArch64II::MO_PAGE | OpFlags); | |||
480 | ||||
481 | ResultReg = createResultReg(&AArch64::GPR64RegClass); | |||
482 | BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(AArch64::LDRXui), | |||
483 | ResultReg) | |||
484 | .addReg(ADRPReg) | |||
485 | .addGlobalAddress(GV, 0, | |||
486 | AArch64II::MO_PAGEOFF | AArch64II::MO_NC | OpFlags); | |||
487 | } else { | |||
488 | // ADRP + ADDX | |||
489 | BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(AArch64::ADRP), | |||
490 | ADRPReg) | |||
491 | .addGlobalAddress(GV, 0, AArch64II::MO_PAGE | OpFlags); | |||
492 | ||||
493 | ResultReg = createResultReg(&AArch64::GPR64spRegClass); | |||
494 | BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(AArch64::ADDXri), | |||
495 | ResultReg) | |||
496 | .addReg(ADRPReg) | |||
497 | .addGlobalAddress(GV, 0, | |||
498 | AArch64II::MO_PAGEOFF | AArch64II::MO_NC | OpFlags) | |||
499 | .addImm(0); | |||
500 | } | |||
501 | return ResultReg; | |||
502 | } | |||
503 | ||||
504 | unsigned AArch64FastISel::fastMaterializeConstant(const Constant *C) { | |||
505 | EVT CEVT = TLI.getValueType(DL, C->getType(), true); | |||
506 | ||||
507 | // Only handle simple types. | |||
508 | if (!CEVT.isSimple()) | |||
509 | return 0; | |||
510 | MVT VT = CEVT.getSimpleVT(); | |||
511 | ||||
512 | if (const auto *CI = dyn_cast<ConstantInt>(C)) | |||
513 | return materializeInt(CI, VT); | |||
514 | else if (const ConstantFP *CFP = dyn_cast<ConstantFP>(C)) | |||
515 | return materializeFP(CFP, VT); | |||
516 | else if (const GlobalValue *GV = dyn_cast<GlobalValue>(C)) | |||
517 | return materializeGV(GV); | |||
518 | ||||
519 | return 0; | |||
520 | } | |||
521 | ||||
522 | unsigned AArch64FastISel::fastMaterializeFloatZero(const ConstantFP* CFP) { | |||
523 | assert(CFP->isNullValue() &&(static_cast <bool> (CFP->isNullValue() && "Floating-point constant is not a positive zero." ) ? void (0) : __assert_fail ("CFP->isNullValue() && \"Floating-point constant is not a positive zero.\"" , "/build/llvm-toolchain-snapshot-7~svn326246/lib/Target/AArch64/AArch64FastISel.cpp" , 524, __extension__ __PRETTY_FUNCTION__)) | |||
524 | "Floating-point constant is not a positive zero.")(static_cast <bool> (CFP->isNullValue() && "Floating-point constant is not a positive zero." ) ? void (0) : __assert_fail ("CFP->isNullValue() && \"Floating-point constant is not a positive zero.\"" , "/build/llvm-toolchain-snapshot-7~svn326246/lib/Target/AArch64/AArch64FastISel.cpp" , 524, __extension__ __PRETTY_FUNCTION__)); | |||
525 | MVT VT; | |||
526 | if (!isTypeLegal(CFP->getType(), VT)) | |||
527 | return 0; | |||
528 | ||||
529 | if (VT != MVT::f32 && VT != MVT::f64) | |||
530 | return 0; | |||
531 | ||||
532 | bool Is64Bit = (VT == MVT::f64); | |||
533 | unsigned ZReg = Is64Bit ? AArch64::XZR : AArch64::WZR; | |||
534 | unsigned Opc = Is64Bit ? AArch64::FMOVXDr : AArch64::FMOVWSr; | |||
535 | return fastEmitInst_r(Opc, TLI.getRegClassFor(VT), ZReg, /*IsKill=*/true); | |||
536 | } | |||
537 | ||||
538 | /// \brief Check if the multiply is by a power-of-2 constant. | |||
539 | static bool isMulPowOf2(const Value *I) { | |||
540 | if (const auto *MI = dyn_cast<MulOperator>(I)) { | |||
541 | if (const auto *C = dyn_cast<ConstantInt>(MI->getOperand(0))) | |||
542 | if (C->getValue().isPowerOf2()) | |||
543 | return true; | |||
544 | if (const auto *C = dyn_cast<ConstantInt>(MI->getOperand(1))) | |||
545 | if (C->getValue().isPowerOf2()) | |||
546 | return true; | |||
547 | } | |||
548 | return false; | |||
549 | } | |||
550 | ||||
551 | // Computes the address to get to an object. | |||
552 | bool AArch64FastISel::computeAddress(const Value *Obj, Address &Addr, Type *Ty) | |||
553 | { | |||
554 | const User *U = nullptr; | |||
555 | unsigned Opcode = Instruction::UserOp1; | |||
556 | if (const Instruction *I = dyn_cast<Instruction>(Obj)) { | |||
557 | // Don't walk into other basic blocks unless the object is an alloca from | |||
558 | // another block, otherwise it may not have a virtual register assigned. | |||
559 | if (FuncInfo.StaticAllocaMap.count(static_cast<const AllocaInst *>(Obj)) || | |||
560 | FuncInfo.MBBMap[I->getParent()] == FuncInfo.MBB) { | |||
561 | Opcode = I->getOpcode(); | |||
562 | U = I; | |||
563 | } | |||
564 | } else if (const ConstantExpr *C = dyn_cast<ConstantExpr>(Obj)) { | |||
565 | Opcode = C->getOpcode(); | |||
566 | U = C; | |||
567 | } | |||
568 | ||||
569 | if (auto *Ty = dyn_cast<PointerType>(Obj->getType())) | |||
570 | if (Ty->getAddressSpace() > 255) | |||
571 | // Fast instruction selection doesn't support the special | |||
572 | // address spaces. | |||
573 | return false; | |||
574 | ||||
575 | switch (Opcode) { | |||
576 | default: | |||
577 | break; | |||
578 | case Instruction::BitCast: | |||
579 | // Look through bitcasts. | |||
580 | return computeAddress(U->getOperand(0), Addr, Ty); | |||
581 | ||||
582 | case Instruction::IntToPtr: | |||
583 | // Look past no-op inttoptrs. | |||
584 | if (TLI.getValueType(DL, U->getOperand(0)->getType()) == | |||
585 | TLI.getPointerTy(DL)) | |||
586 | return computeAddress(U->getOperand(0), Addr, Ty); | |||
587 | break; | |||
588 | ||||
589 | case Instruction::PtrToInt: | |||
590 | // Look past no-op ptrtoints. | |||
591 | if (TLI.getValueType(DL, U->getType()) == TLI.getPointerTy(DL)) | |||
592 | return computeAddress(U->getOperand(0), Addr, Ty); | |||
593 | break; | |||
594 | ||||
595 | case Instruction::GetElementPtr: { | |||
596 | Address SavedAddr = Addr; | |||
597 | uint64_t TmpOffset = Addr.getOffset(); | |||
598 | ||||
599 | // Iterate through the GEP folding the constants into offsets where | |||
600 | // we can. | |||
601 | for (gep_type_iterator GTI = gep_type_begin(U), E = gep_type_end(U); | |||
602 | GTI != E; ++GTI) { | |||
603 | const Value *Op = GTI.getOperand(); | |||
604 | if (StructType *STy = GTI.getStructTypeOrNull()) { | |||
605 | const StructLayout *SL = DL.getStructLayout(STy); | |||
606 | unsigned Idx = cast<ConstantInt>(Op)->getZExtValue(); | |||
607 | TmpOffset += SL->getElementOffset(Idx); | |||
608 | } else { | |||
609 | uint64_t S = DL.getTypeAllocSize(GTI.getIndexedType()); | |||
610 | while (true) { | |||
611 | if (const ConstantInt *CI = dyn_cast<ConstantInt>(Op)) { | |||
612 | // Constant-offset addressing. | |||
613 | TmpOffset += CI->getSExtValue() * S; | |||
614 | break; | |||
615 | } | |||
616 | if (canFoldAddIntoGEP(U, Op)) { | |||
617 | // A compatible add with a constant operand. Fold the constant. | |||
618 | ConstantInt *CI = | |||
619 | cast<ConstantInt>(cast<AddOperator>(Op)->getOperand(1)); | |||
620 | TmpOffset += CI->getSExtValue() * S; | |||
621 | // Iterate on the other operand. | |||
622 | Op = cast<AddOperator>(Op)->getOperand(0); | |||
623 | continue; | |||
624 | } | |||
625 | // Unsupported | |||
626 | goto unsupported_gep; | |||
627 | } | |||
628 | } | |||
629 | } | |||
630 | ||||
631 | // Try to grab the base operand now. | |||
632 | Addr.setOffset(TmpOffset); | |||
633 | if (computeAddress(U->getOperand(0), Addr, Ty)) | |||
634 | return true; | |||
635 | ||||
636 | // We failed, restore everything and try the other options. | |||
637 | Addr = SavedAddr; | |||
638 | ||||
639 | unsupported_gep: | |||
640 | break; | |||
641 | } | |||
642 | case Instruction::Alloca: { | |||
643 | const AllocaInst *AI = cast<AllocaInst>(Obj); | |||
644 | DenseMap<const AllocaInst *, int>::iterator SI = | |||
645 | FuncInfo.StaticAllocaMap.find(AI); | |||
646 | if (SI != FuncInfo.StaticAllocaMap.end()) { | |||
647 | Addr.setKind(Address::FrameIndexBase); | |||
648 | Addr.setFI(SI->second); | |||
649 | return true; | |||
650 | } | |||
651 | break; | |||
652 | } | |||
653 | case Instruction::Add: { | |||
654 | // Adds of constants are common and easy enough. | |||
655 | const Value *LHS = U->getOperand(0); | |||
656 | const Value *RHS = U->getOperand(1); | |||
657 | ||||
658 | if (isa<ConstantInt>(LHS)) | |||
659 | std::swap(LHS, RHS); | |||
660 | ||||
661 | if (const ConstantInt *CI = dyn_cast<ConstantInt>(RHS)) { | |||
662 | Addr.setOffset(Addr.getOffset() + CI->getSExtValue()); | |||
663 | return computeAddress(LHS, Addr, Ty); | |||
664 | } | |||
665 | ||||
666 | Address Backup = Addr; | |||
667 | if (computeAddress(LHS, Addr, Ty) && computeAddress(RHS, Addr, Ty)) | |||
668 | return true; | |||
669 | Addr = Backup; | |||
670 | ||||
671 | break; | |||
672 | } | |||
673 | case Instruction::Sub: { | |||
674 | // Subs of constants are common and easy enough. | |||
675 | const Value *LHS = U->getOperand(0); | |||
676 | const Value *RHS = U->getOperand(1); | |||
677 | ||||
678 | if (const ConstantInt *CI = dyn_cast<ConstantInt>(RHS)) { | |||
679 | Addr.setOffset(Addr.getOffset() - CI->getSExtValue()); | |||
680 | return computeAddress(LHS, Addr, Ty); | |||
681 | } | |||
682 | break; | |||
683 | } | |||
684 | case Instruction::Shl: { | |||
685 | if (Addr.getOffsetReg()) | |||
686 | break; | |||
687 | ||||
688 | const auto *CI = dyn_cast<ConstantInt>(U->getOperand(1)); | |||
689 | if (!CI) | |||
690 | break; | |||
691 | ||||
692 | unsigned Val = CI->getZExtValue(); | |||
693 | if (Val < 1 || Val > 3) | |||
694 | break; | |||
695 | ||||
696 | uint64_t NumBytes = 0; | |||
697 | if (Ty && Ty->isSized()) { | |||
698 | uint64_t NumBits = DL.getTypeSizeInBits(Ty); | |||
699 | NumBytes = NumBits / 8; | |||
700 | if (!isPowerOf2_64(NumBits)) | |||
701 | NumBytes = 0; | |||
702 | } | |||
703 | ||||
704 | if (NumBytes != (1ULL << Val)) | |||
705 | break; | |||
706 | ||||
707 | Addr.setShift(Val); | |||
708 | Addr.setExtendType(AArch64_AM::LSL); | |||
709 | ||||
710 | const Value *Src = U->getOperand(0); | |||
711 | if (const auto *I = dyn_cast<Instruction>(Src)) { | |||
712 | if (FuncInfo.MBBMap[I->getParent()] == FuncInfo.MBB) { | |||
713 | // Fold the zext or sext when it won't become a noop. | |||
714 | if (const auto *ZE = dyn_cast<ZExtInst>(I)) { | |||
715 | if (!isIntExtFree(ZE) && | |||
716 | ZE->getOperand(0)->getType()->isIntegerTy(32)) { | |||
717 | Addr.setExtendType(AArch64_AM::UXTW); | |||
718 | Src = ZE->getOperand(0); | |||
719 | } | |||
720 | } else if (const auto *SE = dyn_cast<SExtInst>(I)) { | |||
721 | if (!isIntExtFree(SE) && | |||
722 | SE->getOperand(0)->getType()->isIntegerTy(32)) { | |||
723 | Addr.setExtendType(AArch64_AM::SXTW); | |||
724 | Src = SE->getOperand(0); | |||
725 | } | |||
726 | } | |||
727 | } | |||
728 | } | |||
729 | ||||
730 | if (const auto *AI = dyn_cast<BinaryOperator>(Src)) | |||
731 | if (AI->getOpcode() == Instruction::And) { | |||
732 | const Value *LHS = AI->getOperand(0); | |||
733 | const Value *RHS = AI->getOperand(1); | |||
734 | ||||
735 | if (const auto *C = dyn_cast<ConstantInt>(LHS)) | |||
736 | if (C->getValue() == 0xffffffff) | |||
737 | std::swap(LHS, RHS); | |||
738 | ||||
739 | if (const auto *C = dyn_cast<ConstantInt>(RHS)) | |||
740 | if (C->getValue() == 0xffffffff) { | |||
741 | Addr.setExtendType(AArch64_AM::UXTW); | |||
742 | unsigned Reg = getRegForValue(LHS); | |||
743 | if (!Reg) | |||
744 | return false; | |||
745 | bool RegIsKill = hasTrivialKill(LHS); | |||
746 | Reg = fastEmitInst_extractsubreg(MVT::i32, Reg, RegIsKill, | |||
747 | AArch64::sub_32); | |||
748 | Addr.setOffsetReg(Reg); | |||
749 | return true; | |||
750 | } | |||
751 | } | |||
752 | ||||
753 | unsigned Reg = getRegForValue(Src); | |||
754 | if (!Reg) | |||
755 | return false; | |||
756 | Addr.setOffsetReg(Reg); | |||
757 | return true; | |||
758 | } | |||
759 | case Instruction::Mul: { | |||
760 | if (Addr.getOffsetReg()) | |||
761 | break; | |||
762 | ||||
763 | if (!isMulPowOf2(U)) | |||
764 | break; | |||
765 | ||||
766 | const Value *LHS = U->getOperand(0); | |||
767 | const Value *RHS = U->getOperand(1); | |||
768 | ||||
769 | // Canonicalize power-of-2 value to the RHS. | |||
770 | if (const auto *C = dyn_cast<ConstantInt>(LHS)) | |||
771 | if (C->getValue().isPowerOf2()) | |||
772 | std::swap(LHS, RHS); | |||
773 | ||||
774 | assert(isa<ConstantInt>(RHS) && "Expected an ConstantInt.")(static_cast <bool> (isa<ConstantInt>(RHS) && "Expected an ConstantInt.") ? void (0) : __assert_fail ("isa<ConstantInt>(RHS) && \"Expected an ConstantInt.\"" , "/build/llvm-toolchain-snapshot-7~svn326246/lib/Target/AArch64/AArch64FastISel.cpp" , 774, __extension__ __PRETTY_FUNCTION__)); | |||
775 | const auto *C = cast<ConstantInt>(RHS); | |||
776 | unsigned Val = C->getValue().logBase2(); | |||
777 | if (Val < 1 || Val > 3) | |||
778 | break; | |||
779 | ||||
780 | uint64_t NumBytes = 0; | |||
781 | if (Ty && Ty->isSized()) { | |||
782 | uint64_t NumBits = DL.getTypeSizeInBits(Ty); | |||
783 | NumBytes = NumBits / 8; | |||
784 | if (!isPowerOf2_64(NumBits)) | |||
785 | NumBytes = 0; | |||
786 | } | |||
787 | ||||
788 | if (NumBytes != (1ULL << Val)) | |||
789 | break; | |||
790 | ||||
791 | Addr.setShift(Val); | |||
792 | Addr.setExtendType(AArch64_AM::LSL); | |||
793 | ||||
794 | const Value *Src = LHS; | |||
795 | if (const auto *I = dyn_cast<Instruction>(Src)) { | |||
796 | if (FuncInfo.MBBMap[I->getParent()] == FuncInfo.MBB) { | |||
797 | // Fold the zext or sext when it won't become a noop. | |||
798 | if (const auto *ZE = dyn_cast<ZExtInst>(I)) { | |||
799 | if (!isIntExtFree(ZE) && | |||
800 | ZE->getOperand(0)->getType()->isIntegerTy(32)) { | |||
801 | Addr.setExtendType(AArch64_AM::UXTW); | |||
802 | Src = ZE->getOperand(0); | |||
803 | } | |||
804 | } else if (const auto *SE = dyn_cast<SExtInst>(I)) { | |||
805 | if (!isIntExtFree(SE) && | |||
806 | SE->getOperand(0)->getType()->isIntegerTy(32)) { | |||
807 | Addr.setExtendType(AArch64_AM::SXTW); | |||
808 | Src = SE->getOperand(0); | |||
809 | } | |||
810 | } | |||
811 | } | |||
812 | } | |||
813 | ||||
814 | unsigned Reg = getRegForValue(Src); | |||
815 | if (!Reg) | |||
816 | return false; | |||
817 | Addr.setOffsetReg(Reg); | |||
818 | return true; | |||
819 | } | |||
820 | case Instruction::And: { | |||
821 | if (Addr.getOffsetReg()) | |||
822 | break; | |||
823 | ||||
824 | if (!Ty || DL.getTypeSizeInBits(Ty) != 8) | |||
825 | break; | |||
826 | ||||
827 | const Value *LHS = U->getOperand(0); | |||
828 | const Value *RHS = U->getOperand(1); | |||
829 | ||||
830 | if (const auto *C = dyn_cast<ConstantInt>(LHS)) | |||
831 | if (C->getValue() == 0xffffffff) | |||
832 | std::swap(LHS, RHS); | |||
833 | ||||
834 | if (const auto *C = dyn_cast<ConstantInt>(RHS)) | |||
835 | if (C->getValue() == 0xffffffff) { | |||
836 | Addr.setShift(0); | |||
837 | Addr.setExtendType(AArch64_AM::LSL); | |||
838 | Addr.setExtendType(AArch64_AM::UXTW); | |||
839 | ||||
840 | unsigned Reg = getRegForValue(LHS); | |||
841 | if (!Reg) | |||
842 | return false; | |||
843 | bool RegIsKill = hasTrivialKill(LHS); | |||
844 | Reg = fastEmitInst_extractsubreg(MVT::i32, Reg, RegIsKill, | |||
845 | AArch64::sub_32); | |||
846 | Addr.setOffsetReg(Reg); | |||
847 | return true; | |||
848 | } | |||
849 | break; | |||
850 | } | |||
851 | case Instruction::SExt: | |||
852 | case Instruction::ZExt: { | |||
853 | if (!Addr.getReg() || Addr.getOffsetReg()) | |||
854 | break; | |||
855 | ||||
856 | const Value *Src = nullptr; | |||
857 | // Fold the zext or sext when it won't become a noop. | |||
858 | if (const auto *ZE = dyn_cast<ZExtInst>(U)) { | |||
859 | if (!isIntExtFree(ZE) && ZE->getOperand(0)->getType()->isIntegerTy(32)) { | |||
860 | Addr.setExtendType(AArch64_AM::UXTW); | |||
861 | Src = ZE->getOperand(0); | |||
862 | } | |||
863 | } else if (const auto *SE = dyn_cast<SExtInst>(U)) { | |||
864 | if (!isIntExtFree(SE) && SE->getOperand(0)->getType()->isIntegerTy(32)) { | |||
865 | Addr.setExtendType(AArch64_AM::SXTW); | |||
866 | Src = SE->getOperand(0); | |||
867 | } | |||
868 | } | |||
869 | ||||
870 | if (!Src) | |||
871 | break; | |||
872 | ||||
873 | Addr.setShift(0); | |||
874 | unsigned Reg = getRegForValue(Src); | |||
875 | if (!Reg) | |||
876 | return false; | |||
877 | Addr.setOffsetReg(Reg); | |||
878 | return true; | |||
879 | } | |||
880 | } // end switch | |||
881 | ||||
882 | if (Addr.isRegBase() && !Addr.getReg()) { | |||
883 | unsigned Reg = getRegForValue(Obj); | |||
884 | if (!Reg) | |||
885 | return false; | |||
886 | Addr.setReg(Reg); | |||
887 | return true; | |||
888 | } | |||
889 | ||||
890 | if (!Addr.getOffsetReg()) { | |||
891 | unsigned Reg = getRegForValue(Obj); | |||
892 | if (!Reg) | |||
893 | return false; | |||
894 | Addr.setOffsetReg(Reg); | |||
895 | return true; | |||
896 | } | |||
897 | ||||
898 | return false; | |||
899 | } | |||
900 | ||||
901 | bool AArch64FastISel::computeCallAddress(const Value *V, Address &Addr) { | |||
902 | const User *U = nullptr; | |||
903 | unsigned Opcode = Instruction::UserOp1; | |||
904 | bool InMBB = true; | |||
905 | ||||
906 | if (const auto *I = dyn_cast<Instruction>(V)) { | |||
907 | Opcode = I->getOpcode(); | |||
908 | U = I; | |||
909 | InMBB = I->getParent() == FuncInfo.MBB->getBasicBlock(); | |||
910 | } else if (const auto *C = dyn_cast<ConstantExpr>(V)) { | |||
911 | Opcode = C->getOpcode(); | |||
912 | U = C; | |||
913 | } | |||
914 | ||||
915 | switch (Opcode) { | |||
916 | default: break; | |||
917 | case Instruction::BitCast: | |||
918 | // Look past bitcasts if its operand is in the same BB. | |||
919 | if (InMBB) | |||
920 | return computeCallAddress(U->getOperand(0), Addr); | |||
921 | break; | |||
922 | case Instruction::IntToPtr: | |||
923 | // Look past no-op inttoptrs if its operand is in the same BB. | |||
924 | if (InMBB && | |||
925 | TLI.getValueType(DL, U->getOperand(0)->getType()) == | |||
926 | TLI.getPointerTy(DL)) | |||
927 | return computeCallAddress(U->getOperand(0), Addr); | |||
928 | break; | |||
929 | case Instruction::PtrToInt: | |||
930 | // Look past no-op ptrtoints if its operand is in the same BB. | |||
931 | if (InMBB && TLI.getValueType(DL, U->getType()) == TLI.getPointerTy(DL)) | |||
932 | return computeCallAddress(U->getOperand(0), Addr); | |||
933 | break; | |||
934 | } | |||
935 | ||||
936 | if (const GlobalValue *GV = dyn_cast<GlobalValue>(V)) { | |||
937 | Addr.setGlobalValue(GV); | |||
938 | return true; | |||
939 | } | |||
940 | ||||
941 | // If all else fails, try to materialize the value in a register. | |||
942 | if (!Addr.getGlobalValue()) { | |||
943 | Addr.setReg(getRegForValue(V)); | |||
944 | return Addr.getReg() != 0; | |||
945 | } | |||
946 | ||||
947 | return false; | |||
948 | } | |||
949 | ||||
950 | bool AArch64FastISel::isTypeLegal(Type *Ty, MVT &VT) { | |||
951 | EVT evt = TLI.getValueType(DL, Ty, true); | |||
952 | ||||
953 | // Only handle simple types. | |||
954 | if (evt == MVT::Other || !evt.isSimple()) | |||
955 | return false; | |||
956 | VT = evt.getSimpleVT(); | |||
957 | ||||
958 | // This is a legal type, but it's not something we handle in fast-isel. | |||
959 | if (VT == MVT::f128) | |||
960 | return false; | |||
961 | ||||
962 | // Handle all other legal types, i.e. a register that will directly hold this | |||
963 | // value. | |||
964 | return TLI.isTypeLegal(VT); | |||
965 | } | |||
966 | ||||
967 | /// \brief Determine if the value type is supported by FastISel. | |||
968 | /// | |||
969 | /// FastISel for AArch64 can handle more value types than are legal. This adds | |||
970 | /// simple value type such as i1, i8, and i16. | |||
971 | bool AArch64FastISel::isTypeSupported(Type *Ty, MVT &VT, bool IsVectorAllowed) { | |||
972 | if (Ty->isVectorTy() && !IsVectorAllowed) | |||
973 | return false; | |||
974 | ||||
975 | if (isTypeLegal(Ty, VT)) | |||
976 | return true; | |||
977 | ||||
978 | // If this is a type than can be sign or zero-extended to a basic operation | |||
979 | // go ahead and accept it now. | |||
980 | if (VT == MVT::i1 || VT == MVT::i8 || VT == MVT::i16) | |||
981 | return true; | |||
982 | ||||
983 | return false; | |||
984 | } | |||
985 | ||||
986 | bool AArch64FastISel::isValueAvailable(const Value *V) const { | |||
987 | if (!isa<Instruction>(V)) | |||
988 | return true; | |||
989 | ||||
990 | const auto *I = cast<Instruction>(V); | |||
991 | return FuncInfo.MBBMap[I->getParent()] == FuncInfo.MBB; | |||
992 | } | |||
993 | ||||
994 | bool AArch64FastISel::simplifyAddress(Address &Addr, MVT VT) { | |||
995 | unsigned ScaleFactor = getImplicitScaleFactor(VT); | |||
996 | if (!ScaleFactor) | |||
997 | return false; | |||
998 | ||||
999 | bool ImmediateOffsetNeedsLowering = false; | |||
1000 | bool RegisterOffsetNeedsLowering = false; | |||
1001 | int64_t Offset = Addr.getOffset(); | |||
1002 | if (((Offset < 0) || (Offset & (ScaleFactor - 1))) && !isInt<9>(Offset)) | |||
1003 | ImmediateOffsetNeedsLowering = true; | |||
1004 | else if (Offset > 0 && !(Offset & (ScaleFactor - 1)) && | |||
1005 | !isUInt<12>(Offset / ScaleFactor)) | |||
1006 | ImmediateOffsetNeedsLowering = true; | |||
1007 | ||||
1008 | // Cannot encode an offset register and an immediate offset in the same | |||
1009 | // instruction. Fold the immediate offset into the load/store instruction and | |||
1010 | // emit an additional add to take care of the offset register. | |||
1011 | if (!ImmediateOffsetNeedsLowering && Addr.getOffset() && Addr.getOffsetReg()) | |||
1012 | RegisterOffsetNeedsLowering = true; | |||
1013 | ||||
1014 | // Cannot encode zero register as base. | |||
1015 | if (Addr.isRegBase() && Addr.getOffsetReg() && !Addr.getReg()) | |||
1016 | RegisterOffsetNeedsLowering = true; | |||
1017 | ||||
1018 | // If this is a stack pointer and the offset needs to be simplified then put | |||
1019 | // the alloca address into a register, set the base type back to register and | |||
1020 | // continue. This should almost never happen. | |||
1021 | if ((ImmediateOffsetNeedsLowering || Addr.getOffsetReg()) && Addr.isFIBase()) | |||
1022 | { | |||
1023 | unsigned ResultReg = createResultReg(&AArch64::GPR64spRegClass); | |||
1024 | BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(AArch64::ADDXri), | |||
1025 | ResultReg) | |||
1026 | .addFrameIndex(Addr.getFI()) | |||
1027 | .addImm(0) | |||
1028 | .addImm(0); | |||
1029 | Addr.setKind(Address::RegBase); | |||
1030 | Addr.setReg(ResultReg); | |||
1031 | } | |||
1032 | ||||
1033 | if (RegisterOffsetNeedsLowering) { | |||
1034 | unsigned ResultReg = 0; | |||
1035 | if (Addr.getReg()) { | |||
1036 | if (Addr.getExtendType() == AArch64_AM::SXTW || | |||
1037 | Addr.getExtendType() == AArch64_AM::UXTW ) | |||
1038 | ResultReg = emitAddSub_rx(/*UseAdd=*/true, MVT::i64, Addr.getReg(), | |||
1039 | /*TODO:IsKill=*/false, Addr.getOffsetReg(), | |||
1040 | /*TODO:IsKill=*/false, Addr.getExtendType(), | |||
1041 | Addr.getShift()); | |||
1042 | else | |||
1043 | ResultReg = emitAddSub_rs(/*UseAdd=*/true, MVT::i64, Addr.getReg(), | |||
1044 | /*TODO:IsKill=*/false, Addr.getOffsetReg(), | |||
1045 | /*TODO:IsKill=*/false, AArch64_AM::LSL, | |||
1046 | Addr.getShift()); | |||
1047 | } else { | |||
1048 | if (Addr.getExtendType() == AArch64_AM::UXTW) | |||
1049 | ResultReg = emitLSL_ri(MVT::i64, MVT::i32, Addr.getOffsetReg(), | |||
1050 | /*Op0IsKill=*/false, Addr.getShift(), | |||
1051 | /*IsZExt=*/true); | |||
1052 | else if (Addr.getExtendType() == AArch64_AM::SXTW) | |||
1053 | ResultReg = emitLSL_ri(MVT::i64, MVT::i32, Addr.getOffsetReg(), | |||
1054 | /*Op0IsKill=*/false, Addr.getShift(), | |||
1055 | /*IsZExt=*/false); | |||
1056 | else | |||
1057 | ResultReg = emitLSL_ri(MVT::i64, MVT::i64, Addr.getOffsetReg(), | |||
1058 | /*Op0IsKill=*/false, Addr.getShift()); | |||
1059 | } | |||
1060 | if (!ResultReg) | |||
1061 | return false; | |||
1062 | ||||
1063 | Addr.setReg(ResultReg); | |||
1064 | Addr.setOffsetReg(0); | |||
1065 | Addr.setShift(0); | |||
1066 | Addr.setExtendType(AArch64_AM::InvalidShiftExtend); | |||
1067 | } | |||
1068 | ||||
1069 | // Since the offset is too large for the load/store instruction get the | |||
1070 | // reg+offset into a register. | |||
1071 | if (ImmediateOffsetNeedsLowering) { | |||
1072 | unsigned ResultReg; | |||
1073 | if (Addr.getReg()) | |||
1074 | // Try to fold the immediate into the add instruction. | |||
1075 | ResultReg = emitAdd_ri_(MVT::i64, Addr.getReg(), /*IsKill=*/false, Offset); | |||
1076 | else | |||
1077 | ResultReg = fastEmit_i(MVT::i64, MVT::i64, ISD::Constant, Offset); | |||
1078 | ||||
1079 | if (!ResultReg) | |||
1080 | return false; | |||
1081 | Addr.setReg(ResultReg); | |||
1082 | Addr.setOffset(0); | |||
1083 | } | |||
1084 | return true; | |||
1085 | } | |||
1086 | ||||
1087 | void AArch64FastISel::addLoadStoreOperands(Address &Addr, | |||
1088 | const MachineInstrBuilder &MIB, | |||
1089 | MachineMemOperand::Flags Flags, | |||
1090 | unsigned ScaleFactor, | |||
1091 | MachineMemOperand *MMO) { | |||
1092 | int64_t Offset = Addr.getOffset() / ScaleFactor; | |||
1093 | // Frame base works a bit differently. Handle it separately. | |||
1094 | if (Addr.isFIBase()) { | |||
1095 | int FI = Addr.getFI(); | |||
1096 | // FIXME: We shouldn't be using getObjectSize/getObjectAlignment. The size | |||
1097 | // and alignment should be based on the VT. | |||
1098 | MMO = FuncInfo.MF->getMachineMemOperand( | |||
1099 | MachinePointerInfo::getFixedStack(*FuncInfo.MF, FI, Offset), Flags, | |||
1100 | MFI.getObjectSize(FI), MFI.getObjectAlignment(FI)); | |||
1101 | // Now add the rest of the operands. | |||
1102 | MIB.addFrameIndex(FI).addImm(Offset); | |||
1103 | } else { | |||
1104 | assert(Addr.isRegBase() && "Unexpected address kind.")(static_cast <bool> (Addr.isRegBase() && "Unexpected address kind." ) ? void (0) : __assert_fail ("Addr.isRegBase() && \"Unexpected address kind.\"" , "/build/llvm-toolchain-snapshot-7~svn326246/lib/Target/AArch64/AArch64FastISel.cpp" , 1104, __extension__ __PRETTY_FUNCTION__)); | |||
1105 | const MCInstrDesc &II = MIB->getDesc(); | |||
1106 | unsigned Idx = (Flags & MachineMemOperand::MOStore) ? 1 : 0; | |||
1107 | Addr.setReg( | |||
1108 | constrainOperandRegClass(II, Addr.getReg(), II.getNumDefs()+Idx)); | |||
1109 | Addr.setOffsetReg( | |||
1110 | constrainOperandRegClass(II, Addr.getOffsetReg(), II.getNumDefs()+Idx+1)); | |||
1111 | if (Addr.getOffsetReg()) { | |||
1112 | assert(Addr.getOffset() == 0 && "Unexpected offset")(static_cast <bool> (Addr.getOffset() == 0 && "Unexpected offset" ) ? void (0) : __assert_fail ("Addr.getOffset() == 0 && \"Unexpected offset\"" , "/build/llvm-toolchain-snapshot-7~svn326246/lib/Target/AArch64/AArch64FastISel.cpp" , 1112, __extension__ __PRETTY_FUNCTION__)); | |||
1113 | bool IsSigned = Addr.getExtendType() == AArch64_AM::SXTW || | |||
1114 | Addr.getExtendType() == AArch64_AM::SXTX; | |||
1115 | MIB.addReg(Addr.getReg()); | |||
1116 | MIB.addReg(Addr.getOffsetReg()); | |||
1117 | MIB.addImm(IsSigned); | |||
1118 | MIB.addImm(Addr.getShift() != 0); | |||
1119 | } else | |||
1120 | MIB.addReg(Addr.getReg()).addImm(Offset); | |||
1121 | } | |||
1122 | ||||
1123 | if (MMO) | |||
1124 | MIB.addMemOperand(MMO); | |||
1125 | } | |||
1126 | ||||
1127 | unsigned AArch64FastISel::emitAddSub(bool UseAdd, MVT RetVT, const Value *LHS, | |||
1128 | const Value *RHS, bool SetFlags, | |||
1129 | bool WantResult, bool IsZExt) { | |||
1130 | AArch64_AM::ShiftExtendType ExtendType = AArch64_AM::InvalidShiftExtend; | |||
1131 | bool NeedExtend = false; | |||
1132 | switch (RetVT.SimpleTy) { | |||
1133 | default: | |||
1134 | return 0; | |||
1135 | case MVT::i1: | |||
1136 | NeedExtend = true; | |||
1137 | break; | |||
1138 | case MVT::i8: | |||
1139 | NeedExtend = true; | |||
1140 | ExtendType = IsZExt ? AArch64_AM::UXTB : AArch64_AM::SXTB; | |||
1141 | break; | |||
1142 | case MVT::i16: | |||
1143 | NeedExtend = true; | |||
1144 | ExtendType = IsZExt ? AArch64_AM::UXTH : AArch64_AM::SXTH; | |||
1145 | break; | |||
1146 | case MVT::i32: // fall-through | |||
1147 | case MVT::i64: | |||
1148 | break; | |||
1149 | } | |||
1150 | MVT SrcVT = RetVT; | |||
1151 | RetVT.SimpleTy = std::max(RetVT.SimpleTy, MVT::i32); | |||
1152 | ||||
1153 | // Canonicalize immediates to the RHS first. | |||
1154 | if (UseAdd && isa<Constant>(LHS) && !isa<Constant>(RHS)) | |||
1155 | std::swap(LHS, RHS); | |||
1156 | ||||
1157 | // Canonicalize mul by power of 2 to the RHS. | |||
1158 | if (UseAdd && LHS->hasOneUse() && isValueAvailable(LHS)) | |||
1159 | if (isMulPowOf2(LHS)) | |||
1160 | std::swap(LHS, RHS); | |||
1161 | ||||
1162 | // Canonicalize shift immediate to the RHS. | |||
1163 | if (UseAdd && LHS->hasOneUse() && isValueAvailable(LHS)) | |||
1164 | if (const auto *SI = dyn_cast<BinaryOperator>(LHS)) | |||
1165 | if (isa<ConstantInt>(SI->getOperand(1))) | |||
1166 | if (SI->getOpcode() == Instruction::Shl || | |||
1167 | SI->getOpcode() == Instruction::LShr || | |||
1168 | SI->getOpcode() == Instruction::AShr ) | |||
1169 | std::swap(LHS, RHS); | |||
1170 | ||||
1171 | unsigned LHSReg = getRegForValue(LHS); | |||
1172 | if (!LHSReg) | |||
1173 | return 0; | |||
1174 | bool LHSIsKill = hasTrivialKill(LHS); | |||
1175 | ||||
1176 | if (NeedExtend) | |||
1177 | LHSReg = emitIntExt(SrcVT, LHSReg, RetVT, IsZExt); | |||
1178 | ||||
1179 | unsigned ResultReg = 0; | |||
1180 | if (const auto *C = dyn_cast<ConstantInt>(RHS)) { | |||
1181 | uint64_t Imm = IsZExt ? C->getZExtValue() : C->getSExtValue(); | |||
1182 | if (C->isNegative()) | |||
1183 | ResultReg = emitAddSub_ri(!UseAdd, RetVT, LHSReg, LHSIsKill, -Imm, | |||
1184 | SetFlags, WantResult); | |||
1185 | else | |||
1186 | ResultReg = emitAddSub_ri(UseAdd, RetVT, LHSReg, LHSIsKill, Imm, SetFlags, | |||
1187 | WantResult); | |||
1188 | } else if (const auto *C = dyn_cast<Constant>(RHS)) | |||
1189 | if (C->isNullValue()) | |||
1190 | ResultReg = emitAddSub_ri(UseAdd, RetVT, LHSReg, LHSIsKill, 0, SetFlags, | |||
1191 | WantResult); | |||
1192 | ||||
1193 | if (ResultReg) | |||
1194 | return ResultReg; | |||
1195 | ||||
1196 | // Only extend the RHS within the instruction if there is a valid extend type. | |||
1197 | if (ExtendType != AArch64_AM::InvalidShiftExtend && RHS->hasOneUse() && | |||
1198 | isValueAvailable(RHS)) { | |||
1199 | if (const auto *SI = dyn_cast<BinaryOperator>(RHS)) | |||
1200 | if (const auto *C = dyn_cast<ConstantInt>(SI->getOperand(1))) | |||
1201 | if ((SI->getOpcode() == Instruction::Shl) && (C->getZExtValue() < 4)) { | |||
1202 | unsigned RHSReg = getRegForValue(SI->getOperand(0)); | |||
1203 | if (!RHSReg) | |||
1204 | return 0; | |||
1205 | bool RHSIsKill = hasTrivialKill(SI->getOperand(0)); | |||
1206 | return emitAddSub_rx(UseAdd, RetVT, LHSReg, LHSIsKill, RHSReg, | |||
1207 | RHSIsKill, ExtendType, C->getZExtValue(), | |||
1208 | SetFlags, WantResult); | |||
1209 | } | |||
1210 | unsigned RHSReg = getRegForValue(RHS); | |||
1211 | if (!RHSReg) | |||
1212 | return 0; | |||
1213 | bool RHSIsKill = hasTrivialKill(RHS); | |||
1214 | return emitAddSub_rx(UseAdd, RetVT, LHSReg, LHSIsKill, RHSReg, RHSIsKill, | |||
1215 | ExtendType, 0, SetFlags, WantResult); | |||
1216 | } | |||
1217 | ||||
1218 | // Check if the mul can be folded into the instruction. | |||
1219 | if (RHS->hasOneUse() && isValueAvailable(RHS)) { | |||
1220 | if (isMulPowOf2(RHS)) { | |||
1221 | const Value *MulLHS = cast<MulOperator>(RHS)->getOperand(0); | |||
1222 | const Value *MulRHS = cast<MulOperator>(RHS)->getOperand(1); | |||
1223 | ||||
1224 | if (const auto *C = dyn_cast<ConstantInt>(MulLHS)) | |||
1225 | if (C->getValue().isPowerOf2()) | |||
1226 | std::swap(MulLHS, MulRHS); | |||
1227 | ||||
1228 | assert(isa<ConstantInt>(MulRHS) && "Expected a ConstantInt.")(static_cast <bool> (isa<ConstantInt>(MulRHS) && "Expected a ConstantInt.") ? void (0) : __assert_fail ("isa<ConstantInt>(MulRHS) && \"Expected a ConstantInt.\"" , "/build/llvm-toolchain-snapshot-7~svn326246/lib/Target/AArch64/AArch64FastISel.cpp" , 1228, __extension__ __PRETTY_FUNCTION__)); | |||
1229 | uint64_t ShiftVal = cast<ConstantInt>(MulRHS)->getValue().logBase2(); | |||
1230 | unsigned RHSReg = getRegForValue(MulLHS); | |||
1231 | if (!RHSReg) | |||
1232 | return 0; | |||
1233 | bool RHSIsKill = hasTrivialKill(MulLHS); | |||
1234 | ResultReg = emitAddSub_rs(UseAdd, RetVT, LHSReg, LHSIsKill, RHSReg, | |||
1235 | RHSIsKill, AArch64_AM::LSL, ShiftVal, SetFlags, | |||
1236 | WantResult); | |||
1237 | if (ResultReg) | |||
1238 | return ResultReg; | |||
1239 | } | |||
1240 | } | |||
1241 | ||||
1242 | // Check if the shift can be folded into the instruction. | |||
1243 | if (RHS->hasOneUse() && isValueAvailable(RHS)) { | |||
1244 | if (const auto *SI = dyn_cast<BinaryOperator>(RHS)) { | |||
1245 | if (const auto *C = dyn_cast<ConstantInt>(SI->getOperand(1))) { | |||
1246 | AArch64_AM::ShiftExtendType ShiftType = AArch64_AM::InvalidShiftExtend; | |||
1247 | switch (SI->getOpcode()) { | |||
1248 | default: break; | |||
1249 | case Instruction::Shl: ShiftType = AArch64_AM::LSL; break; | |||
1250 | case Instruction::LShr: ShiftType = AArch64_AM::LSR; break; | |||
1251 | case Instruction::AShr: ShiftType = AArch64_AM::ASR; break; | |||
1252 | } | |||
1253 | uint64_t ShiftVal = C->getZExtValue(); | |||
1254 | if (ShiftType != AArch64_AM::InvalidShiftExtend) { | |||
1255 | unsigned RHSReg = getRegForValue(SI->getOperand(0)); | |||
1256 | if (!RHSReg) | |||
1257 | return 0; | |||
1258 | bool RHSIsKill = hasTrivialKill(SI->getOperand(0)); | |||
1259 | ResultReg = emitAddSub_rs(UseAdd, RetVT, LHSReg, LHSIsKill, RHSReg, | |||
1260 | RHSIsKill, ShiftType, ShiftVal, SetFlags, | |||
1261 | WantResult); | |||
1262 | if (ResultReg) | |||
1263 | return ResultReg; | |||
1264 | } | |||
1265 | } | |||
1266 | } | |||
1267 | } | |||
1268 | ||||
1269 | unsigned RHSReg = getRegForValue(RHS); | |||
1270 | if (!RHSReg) | |||
1271 | return 0; | |||
1272 | bool RHSIsKill = hasTrivialKill(RHS); | |||
1273 | ||||
1274 | if (NeedExtend) | |||
1275 | RHSReg = emitIntExt(SrcVT, RHSReg, RetVT, IsZExt); | |||
1276 | ||||
1277 | return emitAddSub_rr(UseAdd, RetVT, LHSReg, LHSIsKill, RHSReg, RHSIsKill, | |||
1278 | SetFlags, WantResult); | |||
1279 | } | |||
1280 | ||||
1281 | unsigned AArch64FastISel::emitAddSub_rr(bool UseAdd, MVT RetVT, unsigned LHSReg, | |||
1282 | bool LHSIsKill, unsigned RHSReg, | |||
1283 | bool RHSIsKill, bool SetFlags, | |||
1284 | bool WantResult) { | |||
1285 | assert(LHSReg && RHSReg && "Invalid register number.")(static_cast <bool> (LHSReg && RHSReg && "Invalid register number.") ? void (0) : __assert_fail ("LHSReg && RHSReg && \"Invalid register number.\"" , "/build/llvm-toolchain-snapshot-7~svn326246/lib/Target/AArch64/AArch64FastISel.cpp" , 1285, __extension__ __PRETTY_FUNCTION__)); | |||
1286 | ||||
1287 | if (LHSReg == AArch64::SP || LHSReg == AArch64::WSP || | |||
1288 | RHSReg == AArch64::SP || RHSReg == AArch64::WSP) | |||
1289 | return 0; | |||
1290 | ||||
1291 | if (RetVT != MVT::i32 && RetVT != MVT::i64) | |||
1292 | return 0; | |||
1293 | ||||
1294 | static const unsigned OpcTable[2][2][2] = { | |||
1295 | { { AArch64::SUBWrr, AArch64::SUBXrr }, | |||
1296 | { AArch64::ADDWrr, AArch64::ADDXrr } }, | |||
1297 | { { AArch64::SUBSWrr, AArch64::SUBSXrr }, | |||
1298 | { AArch64::ADDSWrr, AArch64::ADDSXrr } } | |||
1299 | }; | |||
1300 | bool Is64Bit = RetVT == MVT::i64; | |||
1301 | unsigned Opc = OpcTable[SetFlags][UseAdd][Is64Bit]; | |||
1302 | const TargetRegisterClass *RC = | |||
1303 | Is64Bit ? &AArch64::GPR64RegClass : &AArch64::GPR32RegClass; | |||
1304 | unsigned ResultReg; | |||
1305 | if (WantResult) | |||
1306 | ResultReg = createResultReg(RC); | |||
1307 | else | |||
1308 | ResultReg = Is64Bit ? AArch64::XZR : AArch64::WZR; | |||
1309 | ||||
1310 | const MCInstrDesc &II = TII.get(Opc); | |||
1311 | LHSReg = constrainOperandRegClass(II, LHSReg, II.getNumDefs()); | |||
1312 | RHSReg = constrainOperandRegClass(II, RHSReg, II.getNumDefs() + 1); | |||
1313 | BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, II, ResultReg) | |||
1314 | .addReg(LHSReg, getKillRegState(LHSIsKill)) | |||
1315 | .addReg(RHSReg, getKillRegState(RHSIsKill)); | |||
1316 | return ResultReg; | |||
1317 | } | |||
1318 | ||||
1319 | unsigned AArch64FastISel::emitAddSub_ri(bool UseAdd, MVT RetVT, unsigned LHSReg, | |||
1320 | bool LHSIsKill, uint64_t Imm, | |||
1321 | bool SetFlags, bool WantResult) { | |||
1322 | assert(LHSReg && "Invalid register number.")(static_cast <bool> (LHSReg && "Invalid register number." ) ? void (0) : __assert_fail ("LHSReg && \"Invalid register number.\"" , "/build/llvm-toolchain-snapshot-7~svn326246/lib/Target/AArch64/AArch64FastISel.cpp" , 1322, __extension__ __PRETTY_FUNCTION__)); | |||
1323 | ||||
1324 | if (RetVT != MVT::i32 && RetVT != MVT::i64) | |||
1325 | return 0; | |||
1326 | ||||
1327 | unsigned ShiftImm; | |||
1328 | if (isUInt<12>(Imm)) | |||
1329 | ShiftImm = 0; | |||
1330 | else if ((Imm & 0xfff000) == Imm) { | |||
1331 | ShiftImm = 12; | |||
1332 | Imm >>= 12; | |||
1333 | } else | |||
1334 | return 0; | |||
1335 | ||||
1336 | static const unsigned OpcTable[2][2][2] = { | |||
1337 | { { AArch64::SUBWri, AArch64::SUBXri }, | |||
1338 | { AArch64::ADDWri, AArch64::ADDXri } }, | |||
1339 | { { AArch64::SUBSWri, AArch64::SUBSXri }, | |||
1340 | { AArch64::ADDSWri, AArch64::ADDSXri } } | |||
1341 | }; | |||
1342 | bool Is64Bit = RetVT == MVT::i64; | |||
1343 | unsigned Opc = OpcTable[SetFlags][UseAdd][Is64Bit]; | |||
1344 | const TargetRegisterClass *RC; | |||
1345 | if (SetFlags) | |||
1346 | RC = Is64Bit ? &AArch64::GPR64RegClass : &AArch64::GPR32RegClass; | |||
1347 | else | |||
1348 | RC = Is64Bit ? &AArch64::GPR64spRegClass : &AArch64::GPR32spRegClass; | |||
1349 | unsigned ResultReg; | |||
1350 | if (WantResult) | |||
1351 | ResultReg = createResultReg(RC); | |||
1352 | else | |||
1353 | ResultReg = Is64Bit ? AArch64::XZR : AArch64::WZR; | |||
1354 | ||||
1355 | const MCInstrDesc &II = TII.get(Opc); | |||
1356 | LHSReg = constrainOperandRegClass(II, LHSReg, II.getNumDefs()); | |||
1357 | BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, II, ResultReg) | |||
1358 | .addReg(LHSReg, getKillRegState(LHSIsKill)) | |||
1359 | .addImm(Imm) | |||
1360 | .addImm(getShifterImm(AArch64_AM::LSL, ShiftImm)); | |||
1361 | return ResultReg; | |||
1362 | } | |||
1363 | ||||
1364 | unsigned AArch64FastISel::emitAddSub_rs(bool UseAdd, MVT RetVT, unsigned LHSReg, | |||
1365 | bool LHSIsKill, unsigned RHSReg, | |||
1366 | bool RHSIsKill, | |||
1367 | AArch64_AM::ShiftExtendType ShiftType, | |||
1368 | uint64_t ShiftImm, bool SetFlags, | |||
1369 | bool WantResult) { | |||
1370 | assert(LHSReg && RHSReg && "Invalid register number.")(static_cast <bool> (LHSReg && RHSReg && "Invalid register number.") ? void (0) : __assert_fail ("LHSReg && RHSReg && \"Invalid register number.\"" , "/build/llvm-toolchain-snapshot-7~svn326246/lib/Target/AArch64/AArch64FastISel.cpp" , 1370, __extension__ __PRETTY_FUNCTION__)); | |||
1371 | assert(LHSReg != AArch64::SP && LHSReg != AArch64::WSP &&(static_cast <bool> (LHSReg != AArch64::SP && LHSReg != AArch64::WSP && RHSReg != AArch64::SP && RHSReg != AArch64::WSP) ? void (0) : __assert_fail ("LHSReg != AArch64::SP && LHSReg != AArch64::WSP && RHSReg != AArch64::SP && RHSReg != AArch64::WSP" , "/build/llvm-toolchain-snapshot-7~svn326246/lib/Target/AArch64/AArch64FastISel.cpp" , 1372, __extension__ __PRETTY_FUNCTION__)) | |||
1372 | RHSReg != AArch64::SP && RHSReg != AArch64::WSP)(static_cast <bool> (LHSReg != AArch64::SP && LHSReg != AArch64::WSP && RHSReg != AArch64::SP && RHSReg != AArch64::WSP) ? void (0) : __assert_fail ("LHSReg != AArch64::SP && LHSReg != AArch64::WSP && RHSReg != AArch64::SP && RHSReg != AArch64::WSP" , "/build/llvm-toolchain-snapshot-7~svn326246/lib/Target/AArch64/AArch64FastISel.cpp" , 1372, __extension__ __PRETTY_FUNCTION__)); | |||
1373 | ||||
1374 | if (RetVT != MVT::i32 && RetVT != MVT::i64) | |||
1375 | return 0; | |||
1376 | ||||
1377 | // Don't deal with undefined shifts. | |||
1378 | if (ShiftImm >= RetVT.getSizeInBits()) | |||
1379 | return 0; | |||
1380 | ||||
1381 | static const unsigned OpcTable[2][2][2] = { | |||
1382 | { { AArch64::SUBWrs, AArch64::SUBXrs }, | |||
1383 | { AArch64::ADDWrs, AArch64::ADDXrs } }, | |||
1384 | { { AArch64::SUBSWrs, AArch64::SUBSXrs }, | |||
1385 | { AArch64::ADDSWrs, AArch64::ADDSXrs } } | |||
1386 | }; | |||
1387 | bool Is64Bit = RetVT == MVT::i64; | |||
1388 | unsigned Opc = OpcTable[SetFlags][UseAdd][Is64Bit]; | |||
1389 | const TargetRegisterClass *RC = | |||
1390 | Is64Bit ? &AArch64::GPR64RegClass : &AArch64::GPR32RegClass; | |||
1391 | unsigned ResultReg; | |||
1392 | if (WantResult) | |||
1393 | ResultReg = createResultReg(RC); | |||
1394 | else | |||
1395 | ResultReg = Is64Bit ? AArch64::XZR : AArch64::WZR; | |||
1396 | ||||
1397 | const MCInstrDesc &II = TII.get(Opc); | |||
1398 | LHSReg = constrainOperandRegClass(II, LHSReg, II.getNumDefs()); | |||
1399 | RHSReg = constrainOperandRegClass(II, RHSReg, II.getNumDefs() + 1); | |||
1400 | BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, II, ResultReg) | |||
1401 | .addReg(LHSReg, getKillRegState(LHSIsKill)) | |||
1402 | .addReg(RHSReg, getKillRegState(RHSIsKill)) | |||
1403 | .addImm(getShifterImm(ShiftType, ShiftImm)); | |||
1404 | return ResultReg; | |||
1405 | } | |||
1406 | ||||
1407 | unsigned AArch64FastISel::emitAddSub_rx(bool UseAdd, MVT RetVT, unsigned LHSReg, | |||
1408 | bool LHSIsKill, unsigned RHSReg, | |||
1409 | bool RHSIsKill, | |||
1410 | AArch64_AM::ShiftExtendType ExtType, | |||
1411 | uint64_t ShiftImm, bool SetFlags, | |||
1412 | bool WantResult) { | |||
1413 | assert(LHSReg && RHSReg && "Invalid register number.")(static_cast <bool> (LHSReg && RHSReg && "Invalid register number.") ? void (0) : __assert_fail ("LHSReg && RHSReg && \"Invalid register number.\"" , "/build/llvm-toolchain-snapshot-7~svn326246/lib/Target/AArch64/AArch64FastISel.cpp" , 1413, __extension__ __PRETTY_FUNCTION__)); | |||
1414 | assert(LHSReg != AArch64::XZR && LHSReg != AArch64::WZR &&(static_cast <bool> (LHSReg != AArch64::XZR && LHSReg != AArch64::WZR && RHSReg != AArch64::XZR && RHSReg != AArch64::WZR) ? void (0) : __assert_fail ("LHSReg != AArch64::XZR && LHSReg != AArch64::WZR && RHSReg != AArch64::XZR && RHSReg != AArch64::WZR" , "/build/llvm-toolchain-snapshot-7~svn326246/lib/Target/AArch64/AArch64FastISel.cpp" , 1415, __extension__ __PRETTY_FUNCTION__)) | |||
1415 | RHSReg != AArch64::XZR && RHSReg != AArch64::WZR)(static_cast <bool> (LHSReg != AArch64::XZR && LHSReg != AArch64::WZR && RHSReg != AArch64::XZR && RHSReg != AArch64::WZR) ? void (0) : __assert_fail ("LHSReg != AArch64::XZR && LHSReg != AArch64::WZR && RHSReg != AArch64::XZR && RHSReg != AArch64::WZR" , "/build/llvm-toolchain-snapshot-7~svn326246/lib/Target/AArch64/AArch64FastISel.cpp" , 1415, __extension__ __PRETTY_FUNCTION__)); | |||
1416 | ||||
1417 | if (RetVT != MVT::i32 && RetVT != MVT::i64) | |||
1418 | return 0; | |||
1419 | ||||
1420 | if (ShiftImm >= 4) | |||
1421 | return 0; | |||
1422 | ||||
1423 | static const unsigned OpcTable[2][2][2] = { | |||
1424 | { { AArch64::SUBWrx, AArch64::SUBXrx }, | |||
1425 | { AArch64::ADDWrx, AArch64::ADDXrx } }, | |||
1426 | { { AArch64::SUBSWrx, AArch64::SUBSXrx }, | |||
1427 | { AArch64::ADDSWrx, AArch64::ADDSXrx } } | |||
1428 | }; | |||
1429 | bool Is64Bit = RetVT == MVT::i64; | |||
1430 | unsigned Opc = OpcTable[SetFlags][UseAdd][Is64Bit]; | |||
1431 | const TargetRegisterClass *RC = nullptr; | |||
1432 | if (SetFlags) | |||
1433 | RC = Is64Bit ? &AArch64::GPR64RegClass : &AArch64::GPR32RegClass; | |||
1434 | else | |||
1435 | RC = Is64Bit ? &AArch64::GPR64spRegClass : &AArch64::GPR32spRegClass; | |||
1436 | unsigned ResultReg; | |||
1437 | if (WantResult) | |||
1438 | ResultReg = createResultReg(RC); | |||
1439 | else | |||
1440 | ResultReg = Is64Bit ? AArch64::XZR : AArch64::WZR; | |||
1441 | ||||
1442 | const MCInstrDesc &II = TII.get(Opc); | |||
1443 | LHSReg = constrainOperandRegClass(II, LHSReg, II.getNumDefs()); | |||
1444 | RHSReg = constrainOperandRegClass(II, RHSReg, II.getNumDefs() + 1); | |||
1445 | BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, II, ResultReg) | |||
1446 | .addReg(LHSReg, getKillRegState(LHSIsKill)) | |||
1447 | .addReg(RHSReg, getKillRegState(RHSIsKill)) | |||
1448 | .addImm(getArithExtendImm(ExtType, ShiftImm)); | |||
1449 | return ResultReg; | |||
1450 | } | |||
1451 | ||||
1452 | bool AArch64FastISel::emitCmp(const Value *LHS, const Value *RHS, bool IsZExt) { | |||
1453 | Type *Ty = LHS->getType(); | |||
1454 | EVT EVT = TLI.getValueType(DL, Ty, true); | |||
1455 | if (!EVT.isSimple()) | |||
1456 | return false; | |||
1457 | MVT VT = EVT.getSimpleVT(); | |||
1458 | ||||
1459 | switch (VT.SimpleTy) { | |||
1460 | default: | |||
1461 | return false; | |||
1462 | case MVT::i1: | |||
1463 | case MVT::i8: | |||
1464 | case MVT::i16: | |||
1465 | case MVT::i32: | |||
1466 | case MVT::i64: | |||
1467 | return emitICmp(VT, LHS, RHS, IsZExt); | |||
1468 | case MVT::f32: | |||
1469 | case MVT::f64: | |||
1470 | return emitFCmp(VT, LHS, RHS); | |||
1471 | } | |||
1472 | } | |||
1473 | ||||
1474 | bool AArch64FastISel::emitICmp(MVT RetVT, const Value *LHS, const Value *RHS, | |||
1475 | bool IsZExt) { | |||
1476 | return emitSub(RetVT, LHS, RHS, /*SetFlags=*/true, /*WantResult=*/false, | |||
1477 | IsZExt) != 0; | |||
1478 | } | |||
1479 | ||||
1480 | bool AArch64FastISel::emitICmp_ri(MVT RetVT, unsigned LHSReg, bool LHSIsKill, | |||
1481 | uint64_t Imm) { | |||
1482 | return emitAddSub_ri(/*UseAdd=*/false, RetVT, LHSReg, LHSIsKill, Imm, | |||
1483 | /*SetFlags=*/true, /*WantResult=*/false) != 0; | |||
1484 | } | |||
1485 | ||||
1486 | bool AArch64FastISel::emitFCmp(MVT RetVT, const Value *LHS, const Value *RHS) { | |||
1487 | if (RetVT != MVT::f32 && RetVT != MVT::f64) | |||
1488 | return false; | |||
1489 | ||||
1490 | // Check to see if the 2nd operand is a constant that we can encode directly | |||
1491 | // in the compare. | |||
1492 | bool UseImm = false; | |||
1493 | if (const auto *CFP = dyn_cast<ConstantFP>(RHS)) | |||
1494 | if (CFP->isZero() && !CFP->isNegative()) | |||
1495 | UseImm = true; | |||
1496 | ||||
1497 | unsigned LHSReg = getRegForValue(LHS); | |||
1498 | if (!LHSReg) | |||
1499 | return false; | |||
1500 | bool LHSIsKill = hasTrivialKill(LHS); | |||
1501 | ||||
1502 | if (UseImm) { | |||
1503 | unsigned Opc = (RetVT == MVT::f64) ? AArch64::FCMPDri : AArch64::FCMPSri; | |||
1504 | BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(Opc)) | |||
1505 | .addReg(LHSReg, getKillRegState(LHSIsKill)); | |||
1506 | return true; | |||
1507 | } | |||
1508 | ||||
1509 | unsigned RHSReg = getRegForValue(RHS); | |||
1510 | if (!RHSReg) | |||
1511 | return false; | |||
1512 | bool RHSIsKill = hasTrivialKill(RHS); | |||
1513 | ||||
1514 | unsigned Opc = (RetVT == MVT::f64) ? AArch64::FCMPDrr : AArch64::FCMPSrr; | |||
1515 | BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(Opc)) | |||
1516 | .addReg(LHSReg, getKillRegState(LHSIsKill)) | |||
1517 | .addReg(RHSReg, getKillRegState(RHSIsKill)); | |||
1518 | return true; | |||
1519 | } | |||
1520 | ||||
1521 | unsigned AArch64FastISel::emitAdd(MVT RetVT, const Value *LHS, const Value *RHS, | |||
1522 | bool SetFlags, bool WantResult, bool IsZExt) { | |||
1523 | return emitAddSub(/*UseAdd=*/true, RetVT, LHS, RHS, SetFlags, WantResult, | |||
1524 | IsZExt); | |||
1525 | } | |||
1526 | ||||
1527 | /// \brief This method is a wrapper to simplify add emission. | |||
1528 | /// | |||
1529 | /// First try to emit an add with an immediate operand using emitAddSub_ri. If | |||
1530 | /// that fails, then try to materialize the immediate into a register and use | |||
1531 | /// emitAddSub_rr instead. | |||
1532 | unsigned AArch64FastISel::emitAdd_ri_(MVT VT, unsigned Op0, bool Op0IsKill, | |||
1533 | int64_t Imm) { | |||
1534 | unsigned ResultReg; | |||
1535 | if (Imm < 0) | |||
1536 | ResultReg = emitAddSub_ri(false, VT, Op0, Op0IsKill, -Imm); | |||
1537 | else | |||
1538 | ResultReg = emitAddSub_ri(true, VT, Op0, Op0IsKill, Imm); | |||
1539 | ||||
1540 | if (ResultReg) | |||
1541 | return ResultReg; | |||
1542 | ||||
1543 | unsigned CReg = fastEmit_i(VT, VT, ISD::Constant, Imm); | |||
1544 | if (!CReg) | |||
1545 | return 0; | |||
1546 | ||||
1547 | ResultReg = emitAddSub_rr(true, VT, Op0, Op0IsKill, CReg, true); | |||
1548 | return ResultReg; | |||
1549 | } | |||
1550 | ||||
1551 | unsigned AArch64FastISel::emitSub(MVT RetVT, const Value *LHS, const Value *RHS, | |||
1552 | bool SetFlags, bool WantResult, bool IsZExt) { | |||
1553 | return emitAddSub(/*UseAdd=*/false, RetVT, LHS, RHS, SetFlags, WantResult, | |||
1554 | IsZExt); | |||
1555 | } | |||
1556 | ||||
1557 | unsigned AArch64FastISel::emitSubs_rr(MVT RetVT, unsigned LHSReg, | |||
1558 | bool LHSIsKill, unsigned RHSReg, | |||
1559 | bool RHSIsKill, bool WantResult) { | |||
1560 | return emitAddSub_rr(/*UseAdd=*/false, RetVT, LHSReg, LHSIsKill, RHSReg, | |||
1561 | RHSIsKill, /*SetFlags=*/true, WantResult); | |||
1562 | } | |||
1563 | ||||
1564 | unsigned AArch64FastISel::emitSubs_rs(MVT RetVT, unsigned LHSReg, | |||
1565 | bool LHSIsKill, unsigned RHSReg, | |||
1566 | bool RHSIsKill, | |||
1567 | AArch64_AM::ShiftExtendType ShiftType, | |||
1568 | uint64_t ShiftImm, bool WantResult) { | |||
1569 | return emitAddSub_rs(/*UseAdd=*/false, RetVT, LHSReg, LHSIsKill, RHSReg, | |||
1570 | RHSIsKill, ShiftType, ShiftImm, /*SetFlags=*/true, | |||
1571 | WantResult); | |||
1572 | } | |||
1573 | ||||
1574 | unsigned AArch64FastISel::emitLogicalOp(unsigned ISDOpc, MVT RetVT, | |||
1575 | const Value *LHS, const Value *RHS) { | |||
1576 | // Canonicalize immediates to the RHS first. | |||
1577 | if (isa<ConstantInt>(LHS) && !isa<ConstantInt>(RHS)) | |||
1578 | std::swap(LHS, RHS); | |||
1579 | ||||
1580 | // Canonicalize mul by power-of-2 to the RHS. | |||
1581 | if (LHS->hasOneUse() && isValueAvailable(LHS)) | |||
1582 | if (isMulPowOf2(LHS)) | |||
1583 | std::swap(LHS, RHS); | |||
1584 | ||||
1585 | // Canonicalize shift immediate to the RHS. | |||
1586 | if (LHS->hasOneUse() && isValueAvailable(LHS)) | |||
1587 | if (const auto *SI = dyn_cast<ShlOperator>(LHS)) | |||
1588 | if (isa<ConstantInt>(SI->getOperand(1))) | |||
1589 | std::swap(LHS, RHS); | |||
1590 | ||||
1591 | unsigned LHSReg = getRegForValue(LHS); | |||
1592 | if (!LHSReg) | |||
1593 | return 0; | |||
1594 | bool LHSIsKill = hasTrivialKill(LHS); | |||
1595 | ||||
1596 | unsigned ResultReg = 0; | |||
1597 | if (const auto *C = dyn_cast<ConstantInt>(RHS)) { | |||
1598 | uint64_t Imm = C->getZExtValue(); | |||
1599 | ResultReg = emitLogicalOp_ri(ISDOpc, RetVT, LHSReg, LHSIsKill, Imm); | |||
1600 | } | |||
1601 | if (ResultReg) | |||
1602 | return ResultReg; | |||
1603 | ||||
1604 | // Check if the mul can be folded into the instruction. | |||
1605 | if (RHS->hasOneUse() && isValueAvailable(RHS)) { | |||
1606 | if (isMulPowOf2(RHS)) { | |||
1607 | const Value *MulLHS = cast<MulOperator>(RHS)->getOperand(0); | |||
1608 | const Value *MulRHS = cast<MulOperator>(RHS)->getOperand(1); | |||
1609 | ||||
1610 | if (const auto *C = dyn_cast<ConstantInt>(MulLHS)) | |||
1611 | if (C->getValue().isPowerOf2()) | |||
1612 | std::swap(MulLHS, MulRHS); | |||
1613 | ||||
1614 | assert(isa<ConstantInt>(MulRHS) && "Expected a ConstantInt.")(static_cast <bool> (isa<ConstantInt>(MulRHS) && "Expected a ConstantInt.") ? void (0) : __assert_fail ("isa<ConstantInt>(MulRHS) && \"Expected a ConstantInt.\"" , "/build/llvm-toolchain-snapshot-7~svn326246/lib/Target/AArch64/AArch64FastISel.cpp" , 1614, __extension__ __PRETTY_FUNCTION__)); | |||
1615 | uint64_t ShiftVal = cast<ConstantInt>(MulRHS)->getValue().logBase2(); | |||
1616 | ||||
1617 | unsigned RHSReg = getRegForValue(MulLHS); | |||
1618 | if (!RHSReg) | |||
1619 | return 0; | |||
1620 | bool RHSIsKill = hasTrivialKill(MulLHS); | |||
1621 | ResultReg = emitLogicalOp_rs(ISDOpc, RetVT, LHSReg, LHSIsKill, RHSReg, | |||
1622 | RHSIsKill, ShiftVal); | |||
1623 | if (ResultReg) | |||
1624 | return ResultReg; | |||
1625 | } | |||
1626 | } | |||
1627 | ||||
1628 | // Check if the shift can be folded into the instruction. | |||
1629 | if (RHS->hasOneUse() && isValueAvailable(RHS)) { | |||
1630 | if (const auto *SI = dyn_cast<ShlOperator>(RHS)) | |||
1631 | if (const auto *C = dyn_cast<ConstantInt>(SI->getOperand(1))) { | |||
1632 | uint64_t ShiftVal = C->getZExtValue(); | |||
1633 | unsigned RHSReg = getRegForValue(SI->getOperand(0)); | |||
1634 | if (!RHSReg) | |||
1635 | return 0; | |||
1636 | bool RHSIsKill = hasTrivialKill(SI->getOperand(0)); | |||
1637 | ResultReg = emitLogicalOp_rs(ISDOpc, RetVT, LHSReg, LHSIsKill, RHSReg, | |||
1638 | RHSIsKill, ShiftVal); | |||
1639 | if (ResultReg) | |||
1640 | return ResultReg; | |||
1641 | } | |||
1642 | } | |||
1643 | ||||
1644 | unsigned RHSReg = getRegForValue(RHS); | |||
1645 | if (!RHSReg) | |||
1646 | return 0; | |||
1647 | bool RHSIsKill = hasTrivialKill(RHS); | |||
1648 | ||||
1649 | MVT VT = std::max(MVT::i32, RetVT.SimpleTy); | |||
1650 | ResultReg = fastEmit_rr(VT, VT, ISDOpc, LHSReg, LHSIsKill, RHSReg, RHSIsKill); | |||
1651 | if (RetVT >= MVT::i8 && RetVT <= MVT::i16) { | |||
1652 | uint64_t Mask = (RetVT == MVT::i8) ? 0xff : 0xffff; | |||
1653 | ResultReg = emitAnd_ri(MVT::i32, ResultReg, /*IsKill=*/true, Mask); | |||
1654 | } | |||
1655 | return ResultReg; | |||
1656 | } | |||
1657 | ||||
1658 | unsigned AArch64FastISel::emitLogicalOp_ri(unsigned ISDOpc, MVT RetVT, | |||
1659 | unsigned LHSReg, bool LHSIsKill, | |||
1660 | uint64_t Imm) { | |||
1661 | static_assert((ISD::AND + 1 == ISD::OR) && (ISD::AND + 2 == ISD::XOR), | |||
1662 | "ISD nodes are not consecutive!"); | |||
1663 | static const unsigned OpcTable[3][2] = { | |||
1664 | { AArch64::ANDWri, AArch64::ANDXri }, | |||
1665 | { AArch64::ORRWri, AArch64::ORRXri }, | |||
1666 | { AArch64::EORWri, AArch64::EORXri } | |||
1667 | }; | |||
1668 | const TargetRegisterClass *RC; | |||
1669 | unsigned Opc; | |||
1670 | unsigned RegSize; | |||
1671 | switch (RetVT.SimpleTy) { | |||
1672 | default: | |||
1673 | return 0; | |||
1674 | case MVT::i1: | |||
1675 | case MVT::i8: | |||
1676 | case MVT::i16: | |||
1677 | case MVT::i32: { | |||
1678 | unsigned Idx = ISDOpc - ISD::AND; | |||
1679 | Opc = OpcTable[Idx][0]; | |||
1680 | RC = &AArch64::GPR32spRegClass; | |||
1681 | RegSize = 32; | |||
1682 | break; | |||
1683 | } | |||
1684 | case MVT::i64: | |||
1685 | Opc = OpcTable[ISDOpc - ISD::AND][1]; | |||
1686 | RC = &AArch64::GPR64spRegClass; | |||
1687 | RegSize = 64; | |||
1688 | break; | |||
1689 | } | |||
1690 | ||||
1691 | if (!AArch64_AM::isLogicalImmediate(Imm, RegSize)) | |||
1692 | return 0; | |||
1693 | ||||
1694 | unsigned ResultReg = | |||
1695 | fastEmitInst_ri(Opc, RC, LHSReg, LHSIsKill, | |||
1696 | AArch64_AM::encodeLogicalImmediate(Imm, RegSize)); | |||
1697 | if (RetVT >= MVT::i8 && RetVT <= MVT::i16 && ISDOpc != ISD::AND) { | |||
1698 | uint64_t Mask = (RetVT == MVT::i8) ? 0xff : 0xffff; | |||
1699 | ResultReg = emitAnd_ri(MVT::i32, ResultReg, /*IsKill=*/true, Mask); | |||
1700 | } | |||
1701 | return ResultReg; | |||
1702 | } | |||
1703 | ||||
1704 | unsigned AArch64FastISel::emitLogicalOp_rs(unsigned ISDOpc, MVT RetVT, | |||
1705 | unsigned LHSReg, bool LHSIsKill, | |||
1706 | unsigned RHSReg, bool RHSIsKill, | |||
1707 | uint64_t ShiftImm) { | |||
1708 | static_assert((ISD::AND + 1 == ISD::OR) && (ISD::AND + 2 == ISD::XOR), | |||
1709 | "ISD nodes are not consecutive!"); | |||
1710 | static const unsigned OpcTable[3][2] = { | |||
1711 | { AArch64::ANDWrs, AArch64::ANDXrs }, | |||
1712 | { AArch64::ORRWrs, AArch64::ORRXrs }, | |||
1713 | { AArch64::EORWrs, AArch64::EORXrs } | |||
1714 | }; | |||
1715 | ||||
1716 | // Don't deal with undefined shifts. | |||
1717 | if (ShiftImm >= RetVT.getSizeInBits()) | |||
1718 | return 0; | |||
1719 | ||||
1720 | const TargetRegisterClass *RC; | |||
1721 | unsigned Opc; | |||
1722 | switch (RetVT.SimpleTy) { | |||
1723 | default: | |||
1724 | return 0; | |||
1725 | case MVT::i1: | |||
1726 | case MVT::i8: | |||
1727 | case MVT::i16: | |||
1728 | case MVT::i32: | |||
1729 | Opc = OpcTable[ISDOpc - ISD::AND][0]; | |||
1730 | RC = &AArch64::GPR32RegClass; | |||
1731 | break; | |||
1732 | case MVT::i64: | |||
1733 | Opc = OpcTable[ISDOpc - ISD::AND][1]; | |||
1734 | RC = &AArch64::GPR64RegClass; | |||
1735 | break; | |||
1736 | } | |||
1737 | unsigned ResultReg = | |||
1738 | fastEmitInst_rri(Opc, RC, LHSReg, LHSIsKill, RHSReg, RHSIsKill, | |||
1739 | AArch64_AM::getShifterImm(AArch64_AM::LSL, ShiftImm)); | |||
1740 | if (RetVT >= MVT::i8 && RetVT <= MVT::i16) { | |||
1741 | uint64_t Mask = (RetVT == MVT::i8) ? 0xff : 0xffff; | |||
1742 | ResultReg = emitAnd_ri(MVT::i32, ResultReg, /*IsKill=*/true, Mask); | |||
1743 | } | |||
1744 | return ResultReg; | |||
1745 | } | |||
1746 | ||||
1747 | unsigned AArch64FastISel::emitAnd_ri(MVT RetVT, unsigned LHSReg, bool LHSIsKill, | |||
1748 | uint64_t Imm) { | |||
1749 | return emitLogicalOp_ri(ISD::AND, RetVT, LHSReg, LHSIsKill, Imm); | |||
1750 | } | |||
1751 | ||||
1752 | unsigned AArch64FastISel::emitLoad(MVT VT, MVT RetVT, Address Addr, | |||
1753 | bool WantZExt, MachineMemOperand *MMO) { | |||
1754 | if (!TLI.allowsMisalignedMemoryAccesses(VT)) | |||
1755 | return 0; | |||
1756 | ||||
1757 | // Simplify this down to something we can handle. | |||
1758 | if (!simplifyAddress(Addr, VT)) | |||
1759 | return 0; | |||
1760 | ||||
1761 | unsigned ScaleFactor = getImplicitScaleFactor(VT); | |||
1762 | if (!ScaleFactor) | |||
1763 | llvm_unreachable("Unexpected value type.")::llvm::llvm_unreachable_internal("Unexpected value type.", "/build/llvm-toolchain-snapshot-7~svn326246/lib/Target/AArch64/AArch64FastISel.cpp" , 1763); | |||
1764 | ||||
1765 | // Negative offsets require unscaled, 9-bit, signed immediate offsets. | |||
1766 | // Otherwise, we try using scaled, 12-bit, unsigned immediate offsets. | |||
1767 | bool UseScaled = true; | |||
1768 | if ((Addr.getOffset() < 0) || (Addr.getOffset() & (ScaleFactor - 1))) { | |||
1769 | UseScaled = false; | |||
1770 | ScaleFactor = 1; | |||
1771 | } | |||
1772 | ||||
1773 | static const unsigned GPOpcTable[2][8][4] = { | |||
1774 | // Sign-extend. | |||
1775 | { { AArch64::LDURSBWi, AArch64::LDURSHWi, AArch64::LDURWi, | |||
1776 | AArch64::LDURXi }, | |||
1777 | { AArch64::LDURSBXi, AArch64::LDURSHXi, AArch64::LDURSWi, | |||
1778 | AArch64::LDURXi }, | |||
1779 | { AArch64::LDRSBWui, AArch64::LDRSHWui, AArch64::LDRWui, | |||
1780 | AArch64::LDRXui }, | |||
1781 | { AArch64::LDRSBXui, AArch64::LDRSHXui, AArch64::LDRSWui, | |||
1782 | AArch64::LDRXui }, | |||
1783 | { AArch64::LDRSBWroX, AArch64::LDRSHWroX, AArch64::LDRWroX, | |||
1784 | AArch64::LDRXroX }, | |||
1785 | { AArch64::LDRSBXroX, AArch64::LDRSHXroX, AArch64::LDRSWroX, | |||
1786 | AArch64::LDRXroX }, | |||
1787 | { AArch64::LDRSBWroW, AArch64::LDRSHWroW, AArch64::LDRWroW, | |||
1788 | AArch64::LDRXroW }, | |||
1789 | { AArch64::LDRSBXroW, AArch64::LDRSHXroW, AArch64::LDRSWroW, | |||
1790 | AArch64::LDRXroW } | |||
1791 | }, | |||
1792 | // Zero-extend. | |||
1793 | { { AArch64::LDURBBi, AArch64::LDURHHi, AArch64::LDURWi, | |||
1794 | AArch64::LDURXi }, | |||
1795 | { AArch64::LDURBBi, AArch64::LDURHHi, AArch64::LDURWi, | |||
1796 | AArch64::LDURXi }, | |||
1797 | { AArch64::LDRBBui, AArch64::LDRHHui, AArch64::LDRWui, | |||
1798 | AArch64::LDRXui }, | |||
1799 | { AArch64::LDRBBui, AArch64::LDRHHui, AArch64::LDRWui, | |||
1800 | AArch64::LDRXui }, | |||
1801 | { AArch64::LDRBBroX, AArch64::LDRHHroX, AArch64::LDRWroX, | |||
1802 | AArch64::LDRXroX }, | |||
1803 | { AArch64::LDRBBroX, AArch64::LDRHHroX, AArch64::LDRWroX, | |||
1804 | AArch64::LDRXroX }, | |||
1805 | { AArch64::LDRBBroW, AArch64::LDRHHroW, AArch64::LDRWroW, | |||
1806 | AArch64::LDRXroW }, | |||
1807 | { AArch64::LDRBBroW, AArch64::LDRHHroW, AArch64::LDRWroW, | |||
1808 | AArch64::LDRXroW } | |||
1809 | } | |||
1810 | }; | |||
1811 | ||||
1812 | static const unsigned FPOpcTable[4][2] = { | |||
1813 | { AArch64::LDURSi, AArch64::LDURDi }, | |||
1814 | { AArch64::LDRSui, AArch64::LDRDui }, | |||
1815 | { AArch64::LDRSroX, AArch64::LDRDroX }, | |||
1816 | { AArch64::LDRSroW, AArch64::LDRDroW } | |||
1817 | }; | |||
1818 | ||||
1819 | unsigned Opc; | |||
1820 | const TargetRegisterClass *RC; | |||
1821 | bool UseRegOffset = Addr.isRegBase() && !Addr.getOffset() && Addr.getReg() && | |||
1822 | Addr.getOffsetReg(); | |||
1823 | unsigned Idx = UseRegOffset ? 2 : UseScaled ? 1 : 0; | |||
1824 | if (Addr.getExtendType() == AArch64_AM::UXTW || | |||
1825 | Addr.getExtendType() == AArch64_AM::SXTW) | |||
1826 | Idx++; | |||
1827 | ||||
1828 | bool IsRet64Bit = RetVT == MVT::i64; | |||
1829 | switch (VT.SimpleTy) { | |||
1830 | default: | |||
1831 | llvm_unreachable("Unexpected value type.")::llvm::llvm_unreachable_internal("Unexpected value type.", "/build/llvm-toolchain-snapshot-7~svn326246/lib/Target/AArch64/AArch64FastISel.cpp" , 1831); | |||
1832 | case MVT::i1: // Intentional fall-through. | |||
1833 | case MVT::i8: | |||
1834 | Opc = GPOpcTable[WantZExt][2 * Idx + IsRet64Bit][0]; | |||
1835 | RC = (IsRet64Bit && !WantZExt) ? | |||
1836 | &AArch64::GPR64RegClass: &AArch64::GPR32RegClass; | |||
1837 | break; | |||
1838 | case MVT::i16: | |||
1839 | Opc = GPOpcTable[WantZExt][2 * Idx + IsRet64Bit][1]; | |||
1840 | RC = (IsRet64Bit && !WantZExt) ? | |||
1841 | &AArch64::GPR64RegClass: &AArch64::GPR32RegClass; | |||
1842 | break; | |||
1843 | case MVT::i32: | |||
1844 | Opc = GPOpcTable[WantZExt][2 * Idx + IsRet64Bit][2]; | |||
1845 | RC = (IsRet64Bit && !WantZExt) ? | |||
1846 | &AArch64::GPR64RegClass: &AArch64::GPR32RegClass; | |||
1847 | break; | |||
1848 | case MVT::i64: | |||
1849 | Opc = GPOpcTable[WantZExt][2 * Idx + IsRet64Bit][3]; | |||
1850 | RC = &AArch64::GPR64RegClass; | |||
1851 | break; | |||
1852 | case MVT::f32: | |||
1853 | Opc = FPOpcTable[Idx][0]; | |||
1854 | RC = &AArch64::FPR32RegClass; | |||
1855 | break; | |||
1856 | case MVT::f64: | |||
1857 | Opc = FPOpcTable[Idx][1]; | |||
1858 | RC = &AArch64::FPR64RegClass; | |||
1859 | break; | |||
1860 | } | |||
1861 | ||||
1862 | // Create the base instruction, then add the operands. | |||
1863 | unsigned ResultReg = createResultReg(RC); | |||
1864 | MachineInstrBuilder MIB = BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, | |||
1865 | TII.get(Opc), ResultReg); | |||
1866 | addLoadStoreOperands(Addr, MIB, MachineMemOperand::MOLoad, ScaleFactor, MMO); | |||
1867 | ||||
1868 | // Loading an i1 requires special handling. | |||
1869 | if (VT == MVT::i1) { | |||
1870 | unsigned ANDReg = emitAnd_ri(MVT::i32, ResultReg, /*IsKill=*/true, 1); | |||
1871 | assert(ANDReg && "Unexpected AND instruction emission failure.")(static_cast <bool> (ANDReg && "Unexpected AND instruction emission failure." ) ? void (0) : __assert_fail ("ANDReg && \"Unexpected AND instruction emission failure.\"" , "/build/llvm-toolchain-snapshot-7~svn326246/lib/Target/AArch64/AArch64FastISel.cpp" , 1871, __extension__ __PRETTY_FUNCTION__)); | |||
1872 | ResultReg = ANDReg; | |||
1873 | } | |||
1874 | ||||
1875 | // For zero-extending loads to 64bit we emit a 32bit load and then convert | |||
1876 | // the 32bit reg to a 64bit reg. | |||
1877 | if (WantZExt && RetVT == MVT::i64 && VT <= MVT::i32) { | |||
1878 | unsigned Reg64 = createResultReg(&AArch64::GPR64RegClass); | |||
1879 | BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, | |||
1880 | TII.get(AArch64::SUBREG_TO_REG), Reg64) | |||
1881 | .addImm(0) | |||
1882 | .addReg(ResultReg, getKillRegState(true)) | |||
1883 | .addImm(AArch64::sub_32); | |||
1884 | ResultReg = Reg64; | |||
1885 | } | |||
1886 | return ResultReg; | |||
1887 | } | |||
1888 | ||||
1889 | bool AArch64FastISel::selectAddSub(const Instruction *I) { | |||
1890 | MVT VT; | |||
1891 | if (!isTypeSupported(I->getType(), VT, /*IsVectorAllowed=*/true)) | |||
1892 | return false; | |||
1893 | ||||
1894 | if (VT.isVector()) | |||
1895 | return selectOperator(I, I->getOpcode()); | |||
1896 | ||||
1897 | unsigned ResultReg; | |||
1898 | switch (I->getOpcode()) { | |||
1899 | default: | |||
1900 | llvm_unreachable("Unexpected instruction.")::llvm::llvm_unreachable_internal("Unexpected instruction.", "/build/llvm-toolchain-snapshot-7~svn326246/lib/Target/AArch64/AArch64FastISel.cpp" , 1900); | |||
1901 | case Instruction::Add: | |||
1902 | ResultReg = emitAdd(VT, I->getOperand(0), I->getOperand(1)); | |||
1903 | break; | |||
1904 | case Instruction::Sub: | |||
1905 | ResultReg = emitSub(VT, I->getOperand(0), I->getOperand(1)); | |||
1906 | break; | |||
1907 | } | |||
1908 | if (!ResultReg) | |||
1909 | return false; | |||
1910 | ||||
1911 | updateValueMap(I, ResultReg); | |||
1912 | return true; | |||
1913 | } | |||
1914 | ||||
1915 | bool AArch64FastISel::selectLogicalOp(const Instruction *I) { | |||
1916 | MVT VT; | |||
1917 | if (!isTypeSupported(I->getType(), VT, /*IsVectorAllowed=*/true)) | |||
1918 | return false; | |||
1919 | ||||
1920 | if (VT.isVector()) | |||
1921 | return selectOperator(I, I->getOpcode()); | |||
1922 | ||||
1923 | unsigned ResultReg; | |||
1924 | switch (I->getOpcode()) { | |||
1925 | default: | |||
1926 | llvm_unreachable("Unexpected instruction.")::llvm::llvm_unreachable_internal("Unexpected instruction.", "/build/llvm-toolchain-snapshot-7~svn326246/lib/Target/AArch64/AArch64FastISel.cpp" , 1926); | |||
1927 | case Instruction::And: | |||
1928 | ResultReg = emitLogicalOp(ISD::AND, VT, I->getOperand(0), I->getOperand(1)); | |||
1929 | break; | |||
1930 | case Instruction::Or: | |||
1931 | ResultReg = emitLogicalOp(ISD::OR, VT, I->getOperand(0), I->getOperand(1)); | |||
1932 | break; | |||
1933 | case Instruction::Xor: | |||
1934 | ResultReg = emitLogicalOp(ISD::XOR, VT, I->getOperand(0), I->getOperand(1)); | |||
1935 | break; | |||
1936 | } | |||
1937 | if (!ResultReg) | |||
1938 | return false; | |||
1939 | ||||
1940 | updateValueMap(I, ResultReg); | |||
1941 | return true; | |||
1942 | } | |||
1943 | ||||
1944 | bool AArch64FastISel::selectLoad(const Instruction *I) { | |||
1945 | MVT VT; | |||
1946 | // Verify we have a legal type before going any further. Currently, we handle | |||
1947 | // simple types that will directly fit in a register (i32/f32/i64/f64) or | |||
1948 | // those that can be sign or zero-extended to a basic operation (i1/i8/i16). | |||
1949 | if (!isTypeSupported(I->getType(), VT, /*IsVectorAllowed=*/true) || | |||
1950 | cast<LoadInst>(I)->isAtomic()) | |||
1951 | return false; | |||
1952 | ||||
1953 | const Value *SV = I->getOperand(0); | |||
1954 | if (TLI.supportSwiftError()) { | |||
1955 | // Swifterror values can come from either a function parameter with | |||
1956 | // swifterror attribute or an alloca with swifterror attribute. | |||
1957 | if (const Argument *Arg = dyn_cast<Argument>(SV)) { | |||
1958 | if (Arg->hasSwiftErrorAttr()) | |||
1959 | return false; | |||
1960 | } | |||
1961 | ||||
1962 | if (const AllocaInst *Alloca = dyn_cast<AllocaInst>(SV)) { | |||
1963 | if (Alloca->isSwiftError()) | |||
1964 | return false; | |||
1965 | } | |||
1966 | } | |||
1967 | ||||
1968 | // See if we can handle this address. | |||
1969 | Address Addr; | |||
1970 | if (!computeAddress(I->getOperand(0), Addr, I->getType())) | |||
1971 | return false; | |||
1972 | ||||
1973 | // Fold the following sign-/zero-extend into the load instruction. | |||
1974 | bool WantZExt = true; | |||
1975 | MVT RetVT = VT; | |||
1976 | const Value *IntExtVal = nullptr; | |||
1977 | if (I->hasOneUse()) { | |||
1978 | if (const auto *ZE = dyn_cast<ZExtInst>(I->use_begin()->getUser())) { | |||
1979 | if (isTypeSupported(ZE->getType(), RetVT)) | |||
1980 | IntExtVal = ZE; | |||
1981 | else | |||
1982 | RetVT = VT; | |||
1983 | } else if (const auto *SE = dyn_cast<SExtInst>(I->use_begin()->getUser())) { | |||
1984 | if (isTypeSupported(SE->getType(), RetVT)) | |||
1985 | IntExtVal = SE; | |||
1986 | else | |||
1987 | RetVT = VT; | |||
1988 | WantZExt = false; | |||
1989 | } | |||
1990 | } | |||
1991 | ||||
1992 | unsigned ResultReg = | |||
1993 | emitLoad(VT, RetVT, Addr, WantZExt, createMachineMemOperandFor(I)); | |||
1994 | if (!ResultReg) | |||
1995 | return false; | |||
1996 | ||||
1997 | // There are a few different cases we have to handle, because the load or the | |||
1998 | // sign-/zero-extend might not be selected by FastISel if we fall-back to | |||
1999 | // SelectionDAG. There is also an ordering issue when both instructions are in | |||
2000 | // different basic blocks. | |||
2001 | // 1.) The load instruction is selected by FastISel, but the integer extend | |||
2002 | // not. This usually happens when the integer extend is in a different | |||
2003 | // basic block and SelectionDAG took over for that basic block. | |||
2004 | // 2.) The load instruction is selected before the integer extend. This only | |||
2005 | // happens when the integer extend is in a different basic block. | |||
2006 | // 3.) The load instruction is selected by SelectionDAG and the integer extend | |||
2007 | // by FastISel. This happens if there are instructions between the load | |||
2008 | // and the integer extend that couldn't be selected by FastISel. | |||
2009 | if (IntExtVal) { | |||
2010 | // The integer extend hasn't been emitted yet. FastISel or SelectionDAG | |||
2011 | // could select it. Emit a copy to subreg if necessary. FastISel will remove | |||
2012 | // it when it selects the integer extend. | |||
2013 | unsigned Reg = lookUpRegForValue(IntExtVal); | |||
2014 | auto *MI = MRI.getUniqueVRegDef(Reg); | |||
2015 | if (!MI) { | |||
2016 | if (RetVT == MVT::i64 && VT <= MVT::i32) { | |||
2017 | if (WantZExt) { | |||
2018 | // Delete the last emitted instruction from emitLoad (SUBREG_TO_REG). | |||
2019 | std::prev(FuncInfo.InsertPt)->eraseFromParent(); | |||
2020 | ResultReg = std::prev(FuncInfo.InsertPt)->getOperand(0).getReg(); | |||
2021 | } else | |||
2022 | ResultReg = fastEmitInst_extractsubreg(MVT::i32, ResultReg, | |||
2023 | /*IsKill=*/true, | |||
2024 | AArch64::sub_32); | |||
2025 | } | |||
2026 | updateValueMap(I, ResultReg); | |||
2027 | return true; | |||
2028 | } | |||
2029 | ||||
2030 | // The integer extend has already been emitted - delete all the instructions | |||
2031 | // that have been emitted by the integer extend lowering code and use the | |||
2032 | // result from the load instruction directly. | |||
2033 | while (MI) { | |||
2034 | Reg = 0; | |||
2035 | for (auto &Opnd : MI->uses()) { | |||
2036 | if (Opnd.isReg()) { | |||
2037 | Reg = Opnd.getReg(); | |||
2038 | break; | |||
2039 | } | |||
2040 | } | |||
2041 | MI->eraseFromParent(); | |||
2042 | MI = nullptr; | |||
2043 | if (Reg) | |||
2044 | MI = MRI.getUniqueVRegDef(Reg); | |||
2045 | } | |||
2046 | updateValueMap(IntExtVal, ResultReg); | |||
2047 | return true; | |||
2048 | } | |||
2049 | ||||
2050 | updateValueMap(I, ResultReg); | |||
2051 | return true; | |||
2052 | } | |||
2053 | ||||
2054 | bool AArch64FastISel::emitStoreRelease(MVT VT, unsigned SrcReg, | |||
2055 | unsigned AddrReg, | |||
2056 | MachineMemOperand *MMO) { | |||
2057 | unsigned Opc; | |||
2058 | switch (VT.SimpleTy) { | |||
2059 | default: return false; | |||
2060 | case MVT::i8: Opc = AArch64::STLRB; break; | |||
2061 | case MVT::i16: Opc = AArch64::STLRH; break; | |||
2062 | case MVT::i32: Opc = AArch64::STLRW; break; | |||
2063 | case MVT::i64: Opc = AArch64::STLRX; break; | |||
2064 | } | |||
2065 | ||||
2066 | const MCInstrDesc &II = TII.get(Opc); | |||
2067 | SrcReg = constrainOperandRegClass(II, SrcReg, 0); | |||
2068 | AddrReg = constrainOperandRegClass(II, AddrReg, 1); | |||
2069 | BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, II) | |||
2070 | .addReg(SrcReg) | |||
2071 | .addReg(AddrReg) | |||
2072 | .addMemOperand(MMO); | |||
2073 | return true; | |||
2074 | } | |||
2075 | ||||
2076 | bool AArch64FastISel::emitStore(MVT VT, unsigned SrcReg, Address Addr, | |||
2077 | MachineMemOperand *MMO) { | |||
2078 | if (!TLI.allowsMisalignedMemoryAccesses(VT)) | |||
2079 | return false; | |||
2080 | ||||
2081 | // Simplify this down to something we can handle. | |||
2082 | if (!simplifyAddress(Addr, VT)) | |||
2083 | return false; | |||
2084 | ||||
2085 | unsigned ScaleFactor = getImplicitScaleFactor(VT); | |||
2086 | if (!ScaleFactor) | |||
2087 | llvm_unreachable("Unexpected value type.")::llvm::llvm_unreachable_internal("Unexpected value type.", "/build/llvm-toolchain-snapshot-7~svn326246/lib/Target/AArch64/AArch64FastISel.cpp" , 2087); | |||
2088 | ||||
2089 | // Negative offsets require unscaled, 9-bit, signed immediate offsets. | |||
2090 | // Otherwise, we try using scaled, 12-bit, unsigned immediate offsets. | |||
2091 | bool UseScaled = true; | |||
2092 | if ((Addr.getOffset() < 0) || (Addr.getOffset() & (ScaleFactor - 1))) { | |||
2093 | UseScaled = false; | |||
2094 | ScaleFactor = 1; | |||
2095 | } | |||
2096 | ||||
2097 | static const unsigned OpcTable[4][6] = { | |||
2098 | { AArch64::STURBBi, AArch64::STURHHi, AArch64::STURWi, AArch64::STURXi, | |||
2099 | AArch64::STURSi, AArch64::STURDi }, | |||
2100 | { AArch64::STRBBui, AArch64::STRHHui, AArch64::STRWui, AArch64::STRXui, | |||
2101 | AArch64::STRSui, AArch64::STRDui }, | |||
2102 | { AArch64::STRBBroX, AArch64::STRHHroX, AArch64::STRWroX, AArch64::STRXroX, | |||
2103 | AArch64::STRSroX, AArch64::STRDroX }, | |||
2104 | { AArch64::STRBBroW, AArch64::STRHHroW, AArch64::STRWroW, AArch64::STRXroW, | |||
2105 | AArch64::STRSroW, AArch64::STRDroW } | |||
2106 | }; | |||
2107 | ||||
2108 | unsigned Opc; | |||
2109 | bool VTIsi1 = false; | |||
2110 | bool UseRegOffset = Addr.isRegBase() && !Addr.getOffset() && Addr.getReg() && | |||
2111 | Addr.getOffsetReg(); | |||
2112 | unsigned Idx = UseRegOffset ? 2 : UseScaled ? 1 : 0; | |||
2113 | if (Addr.getExtendType() == AArch64_AM::UXTW || | |||
2114 | Addr.getExtendType() == AArch64_AM::SXTW) | |||
2115 | Idx++; | |||
2116 | ||||
2117 | switch (VT.SimpleTy) { | |||
2118 | default: llvm_unreachable("Unexpected value type.")::llvm::llvm_unreachable_internal("Unexpected value type.", "/build/llvm-toolchain-snapshot-7~svn326246/lib/Target/AArch64/AArch64FastISel.cpp" , 2118); | |||
2119 | case MVT::i1: VTIsi1 = true; LLVM_FALLTHROUGH[[clang::fallthrough]]; | |||
2120 | case MVT::i8: Opc = OpcTable[Idx][0]; break; | |||
2121 | case MVT::i16: Opc = OpcTable[Idx][1]; break; | |||
2122 | case MVT::i32: Opc = OpcTable[Idx][2]; break; | |||
2123 | case MVT::i64: Opc = OpcTable[Idx][3]; break; | |||
2124 | case MVT::f32: Opc = OpcTable[Idx][4]; break; | |||
2125 | case MVT::f64: Opc = OpcTable[Idx][5]; break; | |||
2126 | } | |||
2127 | ||||
2128 | // Storing an i1 requires special handling. | |||
2129 | if (VTIsi1 && SrcReg != AArch64::WZR) { | |||
2130 | unsigned ANDReg = emitAnd_ri(MVT::i32, SrcReg, /*TODO:IsKill=*/false, 1); | |||
2131 | assert(ANDReg && "Unexpected AND instruction emission failure.")(static_cast <bool> (ANDReg && "Unexpected AND instruction emission failure." ) ? void (0) : __assert_fail ("ANDReg && \"Unexpected AND instruction emission failure.\"" , "/build/llvm-toolchain-snapshot-7~svn326246/lib/Target/AArch64/AArch64FastISel.cpp" , 2131, __extension__ __PRETTY_FUNCTION__)); | |||
2132 | SrcReg = ANDReg; | |||
2133 | } | |||
2134 | // Create the base instruction, then add the operands. | |||
2135 | const MCInstrDesc &II = TII.get(Opc); | |||
2136 | SrcReg = constrainOperandRegClass(II, SrcReg, II.getNumDefs()); | |||
2137 | MachineInstrBuilder MIB = | |||
2138 | BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, II).addReg(SrcReg); | |||
2139 | addLoadStoreOperands(Addr, MIB, MachineMemOperand::MOStore, ScaleFactor, MMO); | |||
2140 | ||||
2141 | return true; | |||
2142 | } | |||
2143 | ||||
2144 | bool AArch64FastISel::selectStore(const Instruction *I) { | |||
2145 | MVT VT; | |||
2146 | const Value *Op0 = I->getOperand(0); | |||
2147 | // Verify we have a legal type before going any further. Currently, we handle | |||
2148 | // simple types that will directly fit in a register (i32/f32/i64/f64) or | |||
2149 | // those that can be sign or zero-extended to a basic operation (i1/i8/i16). | |||
2150 | if (!isTypeSupported(Op0->getType(), VT, /*IsVectorAllowed=*/true)) | |||
2151 | return false; | |||
2152 | ||||
2153 | const Value *PtrV = I->getOperand(1); | |||
2154 | if (TLI.supportSwiftError()) { | |||
2155 | // Swifterror values can come from either a function parameter with | |||
2156 | // swifterror attribute or an alloca with swifterror attribute. | |||
2157 | if (const Argument *Arg = dyn_cast<Argument>(PtrV)) { | |||
2158 | if (Arg->hasSwiftErrorAttr()) | |||
2159 | return false; | |||
2160 | } | |||
2161 | ||||
2162 | if (const AllocaInst *Alloca = dyn_cast<AllocaInst>(PtrV)) { | |||
2163 | if (Alloca->isSwiftError()) | |||
2164 | return false; | |||
2165 | } | |||
2166 | } | |||
2167 | ||||
2168 | // Get the value to be stored into a register. Use the zero register directly | |||
2169 | // when possible to avoid an unnecessary copy and a wasted register. | |||
2170 | unsigned SrcReg = 0; | |||
2171 | if (const auto *CI = dyn_cast<ConstantInt>(Op0)) { | |||
2172 | if (CI->isZero()) | |||
2173 | SrcReg = (VT == MVT::i64) ? AArch64::XZR : AArch64::WZR; | |||
2174 | } else if (const auto *CF = dyn_cast<ConstantFP>(Op0)) { | |||
2175 | if (CF->isZero() && !CF->isNegative()) { | |||
2176 | VT = MVT::getIntegerVT(VT.getSizeInBits()); | |||
2177 | SrcReg = (VT == MVT::i64) ? AArch64::XZR : AArch64::WZR; | |||
2178 | } | |||
2179 | } | |||
2180 | ||||
2181 | if (!SrcReg) | |||
2182 | SrcReg = getRegForValue(Op0); | |||
2183 | ||||
2184 | if (!SrcReg) | |||
2185 | return false; | |||
2186 | ||||
2187 | auto *SI = cast<StoreInst>(I); | |||
2188 | ||||
2189 | // Try to emit a STLR for seq_cst/release. | |||
2190 | if (SI->isAtomic()) { | |||
2191 | AtomicOrdering Ord = SI->getOrdering(); | |||
2192 | // The non-atomic instructions are sufficient for relaxed stores. | |||
2193 | if (isReleaseOrStronger(Ord)) { | |||
2194 | // The STLR addressing mode only supports a base reg; pass that directly. | |||
2195 | unsigned AddrReg = getRegForValue(PtrV); | |||
2196 | return emitStoreRelease(VT, SrcReg, AddrReg, | |||
2197 | createMachineMemOperandFor(I)); | |||
2198 | } | |||
2199 | } | |||
2200 | ||||
2201 | // See if we can handle this address. | |||
2202 | Address Addr; | |||
2203 | if (!computeAddress(PtrV, Addr, Op0->getType())) | |||
2204 | return false; | |||
2205 | ||||
2206 | if (!emitStore(VT, SrcReg, Addr, createMachineMemOperandFor(I))) | |||
2207 | return false; | |||
2208 | return true; | |||
2209 | } | |||
2210 | ||||
2211 | static AArch64CC::CondCode getCompareCC(CmpInst::Predicate Pred) { | |||
2212 | switch (Pred) { | |||
2213 | case CmpInst::FCMP_ONE: | |||
2214 | case CmpInst::FCMP_UEQ: | |||
2215 | default: | |||
2216 | // AL is our "false" for now. The other two need more compares. | |||
2217 | return AArch64CC::AL; | |||
2218 | case CmpInst::ICMP_EQ: | |||
2219 | case CmpInst::FCMP_OEQ: | |||
2220 | return AArch64CC::EQ; | |||
2221 | case CmpInst::ICMP_SGT: | |||
2222 | case CmpInst::FCMP_OGT: | |||
2223 | return AArch64CC::GT; | |||
2224 | case CmpInst::ICMP_SGE: | |||
2225 | case CmpInst::FCMP_OGE: | |||
2226 | return AArch64CC::GE; | |||
2227 | case CmpInst::ICMP_UGT: | |||
2228 | case CmpInst::FCMP_UGT: | |||
2229 | return AArch64CC::HI; | |||
2230 | case CmpInst::FCMP_OLT: | |||
2231 | return AArch64CC::MI; | |||
2232 | case CmpInst::ICMP_ULE: | |||
2233 | case CmpInst::FCMP_OLE: | |||
2234 | return AArch64CC::LS; | |||
2235 | case CmpInst::FCMP_ORD: | |||
2236 | return AArch64CC::VC; | |||
2237 | case CmpInst::FCMP_UNO: | |||
2238 | return AArch64CC::VS; | |||
2239 | case CmpInst::FCMP_UGE: | |||
2240 | return AArch64CC::PL; | |||
2241 | case CmpInst::ICMP_SLT: | |||
2242 | case CmpInst::FCMP_ULT: | |||
2243 | return AArch64CC::LT; | |||
2244 | case CmpInst::ICMP_SLE: | |||
2245 | case CmpInst::FCMP_ULE: | |||
2246 | return AArch64CC::LE; | |||
2247 | case CmpInst::FCMP_UNE: | |||
2248 | case CmpInst::ICMP_NE: | |||
2249 | return AArch64CC::NE; | |||
2250 | case CmpInst::ICMP_UGE: | |||
2251 | return AArch64CC::HS; | |||
2252 | case CmpInst::ICMP_ULT: | |||
2253 | return AArch64CC::LO; | |||
2254 | } | |||
2255 | } | |||
2256 | ||||
2257 | /// \brief Try to emit a combined compare-and-branch instruction. | |||
2258 | bool AArch64FastISel::emitCompareAndBranch(const BranchInst *BI) { | |||
2259 | assert(isa<CmpInst>(BI->getCondition()) && "Expected cmp instruction")(static_cast <bool> (isa<CmpInst>(BI->getCondition ()) && "Expected cmp instruction") ? void (0) : __assert_fail ("isa<CmpInst>(BI->getCondition()) && \"Expected cmp instruction\"" , "/build/llvm-toolchain-snapshot-7~svn326246/lib/Target/AArch64/AArch64FastISel.cpp" , 2259, __extension__ __PRETTY_FUNCTION__)); | |||
2260 | const CmpInst *CI = cast<CmpInst>(BI->getCondition()); | |||
2261 | CmpInst::Predicate Predicate = optimizeCmpPredicate(CI); | |||
2262 | ||||
2263 | const Value *LHS = CI->getOperand(0); | |||
2264 | const Value *RHS = CI->getOperand(1); | |||
2265 | ||||
2266 | MVT VT; | |||
2267 | if (!isTypeSupported(LHS->getType(), VT)) | |||
2268 | return false; | |||
2269 | ||||
2270 | unsigned BW = VT.getSizeInBits(); | |||
2271 | if (BW > 64) | |||
2272 | return false; | |||
2273 | ||||
2274 | MachineBasicBlock *TBB = FuncInfo.MBBMap[BI->getSuccessor(0)]; | |||
2275 | MachineBasicBlock *FBB = FuncInfo.MBBMap[BI->getSuccessor(1)]; | |||
2276 | ||||
2277 | // Try to take advantage of fallthrough opportunities. | |||
2278 | if (FuncInfo.MBB->isLayoutSuccessor(TBB)) { | |||
2279 | std::swap(TBB, FBB); | |||
2280 | Predicate = CmpInst::getInversePredicate(Predicate); | |||
2281 | } | |||
2282 | ||||
2283 | int TestBit = -1; | |||
2284 | bool IsCmpNE; | |||
2285 | switch (Predicate) { | |||
2286 | default: | |||
2287 | return false; | |||
2288 | case CmpInst::ICMP_EQ: | |||
2289 | case CmpInst::ICMP_NE: | |||
2290 | if (isa<Constant>(LHS) && cast<Constant>(LHS)->isNullValue()) | |||
2291 | std::swap(LHS, RHS); | |||
2292 | ||||
2293 | if (!isa<Constant>(RHS) || !cast<Constant>(RHS)->isNullValue()) | |||
2294 | return false; | |||
2295 | ||||
2296 | if (const auto *AI = dyn_cast<BinaryOperator>(LHS)) | |||
2297 | if (AI->getOpcode() == Instruction::And && isValueAvailable(AI)) { | |||
2298 | const Value *AndLHS = AI->getOperand(0); | |||
2299 | const Value *AndRHS = AI->getOperand(1); | |||
2300 | ||||
2301 | if (const auto *C = dyn_cast<ConstantInt>(AndLHS)) | |||
2302 | if (C->getValue().isPowerOf2()) | |||
2303 | std::swap(AndLHS, AndRHS); | |||
2304 | ||||
2305 | if (const auto *C = dyn_cast<ConstantInt>(AndRHS)) | |||
2306 | if (C->getValue().isPowerOf2()) { | |||
2307 | TestBit = C->getValue().logBase2(); | |||
2308 | LHS = AndLHS; | |||
2309 | } | |||
2310 | } | |||
2311 | ||||
2312 | if (VT == MVT::i1) | |||
2313 | TestBit = 0; | |||
2314 | ||||
2315 | IsCmpNE = Predicate == CmpInst::ICMP_NE; | |||
2316 | break; | |||
2317 | case CmpInst::ICMP_SLT: | |||
2318 | case CmpInst::ICMP_SGE: | |||
2319 | if (!isa<Constant>(RHS) || !cast<Constant>(RHS)->isNullValue()) | |||
2320 | return false; | |||
2321 | ||||
2322 | TestBit = BW - 1; | |||
2323 | IsCmpNE = Predicate == CmpInst::ICMP_SLT; | |||
2324 | break; | |||
2325 | case CmpInst::ICMP_SGT: | |||
2326 | case CmpInst::ICMP_SLE: | |||
2327 | if (!isa<ConstantInt>(RHS)) | |||
2328 | return false; | |||
2329 | ||||
2330 | if (cast<ConstantInt>(RHS)->getValue() != APInt(BW, -1, true)) | |||
2331 | return false; | |||
2332 | ||||
2333 | TestBit = BW - 1; | |||
2334 | IsCmpNE = Predicate == CmpInst::ICMP_SLE; | |||
2335 | break; | |||
2336 | } // end switch | |||
2337 | ||||
2338 | static const unsigned OpcTable[2][2][2] = { | |||
2339 | { {AArch64::CBZW, AArch64::CBZX }, | |||
2340 | {AArch64::CBNZW, AArch64::CBNZX} }, | |||
2341 | { {AArch64::TBZW, AArch64::TBZX }, | |||
2342 | {AArch64::TBNZW, AArch64::TBNZX} } | |||
2343 | }; | |||
2344 | ||||
2345 | bool IsBitTest = TestBit != -1; | |||
2346 | bool Is64Bit = BW == 64; | |||
2347 | if (TestBit < 32 && TestBit >= 0) | |||
2348 | Is64Bit = false; | |||
2349 | ||||
2350 | unsigned Opc = OpcTable[IsBitTest][IsCmpNE][Is64Bit]; | |||
2351 | const MCInstrDesc &II = TII.get(Opc); | |||
2352 | ||||
2353 | unsigned SrcReg = getRegForValue(LHS); | |||
2354 | if (!SrcReg) | |||
2355 | return false; | |||
2356 | bool SrcIsKill = hasTrivialKill(LHS); | |||
2357 | ||||
2358 | if (BW == 64 && !Is64Bit) | |||
2359 | SrcReg = fastEmitInst_extractsubreg(MVT::i32, SrcReg, SrcIsKill, | |||
2360 | AArch64::sub_32); | |||
2361 | ||||
2362 | if ((BW < 32) && !IsBitTest) | |||
2363 | SrcReg = emitIntExt(VT, SrcReg, MVT::i32, /*IsZExt=*/true); | |||
2364 | ||||
2365 | // Emit the combined compare and branch instruction. | |||
2366 | SrcReg = constrainOperandRegClass(II, SrcReg, II.getNumDefs()); | |||
2367 | MachineInstrBuilder MIB = | |||
2368 | BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(Opc)) | |||
2369 | .addReg(SrcReg, getKillRegState(SrcIsKill)); | |||
2370 | if (IsBitTest) | |||
2371 | MIB.addImm(TestBit); | |||
2372 | MIB.addMBB(TBB); | |||
2373 | ||||
2374 | finishCondBranch(BI->getParent(), TBB, FBB); | |||
2375 | return true; | |||
2376 | } | |||
2377 | ||||
2378 | bool AArch64FastISel::selectBranch(const Instruction *I) { | |||
2379 | const BranchInst *BI = cast<BranchInst>(I); | |||
2380 | if (BI->isUnconditional()) { | |||
2381 | MachineBasicBlock *MSucc = FuncInfo.MBBMap[BI->getSuccessor(0)]; | |||
2382 | fastEmitBranch(MSucc, BI->getDebugLoc()); | |||
2383 | return true; | |||
2384 | } | |||
2385 | ||||
2386 | MachineBasicBlock *TBB = FuncInfo.MBBMap[BI->getSuccessor(0)]; | |||
2387 | MachineBasicBlock *FBB = FuncInfo.MBBMap[BI->getSuccessor(1)]; | |||
2388 | ||||
2389 | if (const CmpInst *CI = dyn_cast<CmpInst>(BI->getCondition())) { | |||
2390 | if (CI->hasOneUse() && isValueAvailable(CI)) { | |||
2391 | // Try to optimize or fold the cmp. | |||
2392 | CmpInst::Predicate Predicate = optimizeCmpPredicate(CI); | |||
2393 | switch (Predicate) { | |||
2394 | default: | |||
2395 | break; | |||
2396 | case CmpInst::FCMP_FALSE: | |||
2397 | fastEmitBranch(FBB, DbgLoc); | |||
2398 | return true; | |||
2399 | case CmpInst::FCMP_TRUE: | |||
2400 | fastEmitBranch(TBB, DbgLoc); | |||
2401 | return true; | |||
2402 | } | |||
2403 | ||||
2404 | // Try to emit a combined compare-and-branch first. | |||
2405 | if (emitCompareAndBranch(BI)) | |||
2406 | return true; | |||
2407 | ||||
2408 | // Try to take advantage of fallthrough opportunities. | |||
2409 | if (FuncInfo.MBB->isLayoutSuccessor(TBB)) { | |||
2410 | std::swap(TBB, FBB); | |||
2411 | Predicate = CmpInst::getInversePredicate(Predicate); | |||
2412 | } | |||
2413 | ||||
2414 | // Emit the cmp. | |||
2415 | if (!emitCmp(CI->getOperand(0), CI->getOperand(1), CI->isUnsigned())) | |||
2416 | return false; | |||
2417 | ||||
2418 | // FCMP_UEQ and FCMP_ONE cannot be checked with a single branch | |||
2419 | // instruction. | |||
2420 | AArch64CC::CondCode CC = getCompareCC(Predicate); | |||
2421 | AArch64CC::CondCode ExtraCC = AArch64CC::AL; | |||
2422 | switch (Predicate) { | |||
2423 | default: | |||
2424 | break; | |||
2425 | case CmpInst::FCMP_UEQ: | |||
2426 | ExtraCC = AArch64CC::EQ; | |||
2427 | CC = AArch64CC::VS; | |||
2428 | break; | |||
2429 | case CmpInst::FCMP_ONE: | |||
2430 | ExtraCC = AArch64CC::MI; | |||
2431 | CC = AArch64CC::GT; | |||
2432 | break; | |||
2433 | } | |||
2434 | assert((CC != AArch64CC::AL) && "Unexpected condition code.")(static_cast <bool> ((CC != AArch64CC::AL) && "Unexpected condition code." ) ? void (0) : __assert_fail ("(CC != AArch64CC::AL) && \"Unexpected condition code.\"" , "/build/llvm-toolchain-snapshot-7~svn326246/lib/Target/AArch64/AArch64FastISel.cpp" , 2434, __extension__ __PRETTY_FUNCTION__)); | |||
2435 | ||||
2436 | // Emit the extra branch for FCMP_UEQ and FCMP_ONE. | |||
2437 | if (ExtraCC != AArch64CC::AL) { | |||
2438 | BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(AArch64::Bcc)) | |||
2439 | .addImm(ExtraCC) | |||
2440 | .addMBB(TBB); | |||
2441 | } | |||
2442 | ||||
2443 | // Emit the branch. | |||
2444 | BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(AArch64::Bcc)) | |||
2445 | .addImm(CC) | |||
2446 | .addMBB(TBB); | |||
2447 | ||||
2448 | finishCondBranch(BI->getParent(), TBB, FBB); | |||
2449 | return true; | |||
2450 | } | |||
2451 | } else if (const auto *CI = dyn_cast<ConstantInt>(BI->getCondition())) { | |||
2452 | uint64_t Imm = CI->getZExtValue(); | |||
2453 | MachineBasicBlock *Target = (Imm == 0) ? FBB : TBB; | |||
2454 | BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(AArch64::B)) | |||
2455 | .addMBB(Target); | |||
2456 | ||||
2457 | // Obtain the branch probability and add the target to the successor list. | |||
2458 | if (FuncInfo.BPI) { | |||
2459 | auto BranchProbability = FuncInfo.BPI->getEdgeProbability( | |||
2460 | BI->getParent(), Target->getBasicBlock()); | |||
2461 | FuncInfo.MBB->addSuccessor(Target, BranchProbability); | |||
2462 | } else | |||
2463 | FuncInfo.MBB->addSuccessorWithoutProb(Target); | |||
2464 | return true; | |||
2465 | } else { | |||
2466 | AArch64CC::CondCode CC = AArch64CC::NE; | |||
2467 | if (foldXALUIntrinsic(CC, I, BI->getCondition())) { | |||
2468 | // Fake request the condition, otherwise the intrinsic might be completely | |||
2469 | // optimized away. | |||
2470 | unsigned CondReg = getRegForValue(BI->getCondition()); | |||
2471 | if (!CondReg) | |||
2472 | return false; | |||
2473 | ||||
2474 | // Emit the branch. | |||
2475 | BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(AArch64::Bcc)) | |||
2476 | .addImm(CC) | |||
2477 | .addMBB(TBB); | |||
2478 | ||||
2479 | finishCondBranch(BI->getParent(), TBB, FBB); | |||
2480 | return true; | |||
2481 | } | |||
2482 | } | |||
2483 | ||||
2484 | unsigned CondReg = getRegForValue(BI->getCondition()); | |||
2485 | if (CondReg == 0) | |||
2486 | return false; | |||
2487 | bool CondRegIsKill = hasTrivialKill(BI->getCondition()); | |||
2488 | ||||
2489 | // i1 conditions come as i32 values, test the lowest bit with tb(n)z. | |||
2490 | unsigned Opcode = AArch64::TBNZW; | |||
2491 | if (FuncInfo.MBB->isLayoutSuccessor(TBB)) { | |||
2492 | std::swap(TBB, FBB); | |||
2493 | Opcode = AArch64::TBZW; | |||
2494 | } | |||
2495 | ||||
2496 | const MCInstrDesc &II = TII.get(Opcode); | |||
2497 | unsigned ConstrainedCondReg | |||
2498 | = constrainOperandRegClass(II, CondReg, II.getNumDefs()); | |||
2499 | BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, II) | |||
2500 | .addReg(ConstrainedCondReg, getKillRegState(CondRegIsKill)) | |||
2501 | .addImm(0) | |||
2502 | .addMBB(TBB); | |||
2503 | ||||
2504 | finishCondBranch(BI->getParent(), TBB, FBB); | |||
2505 | return true; | |||
2506 | } | |||
2507 | ||||
2508 | bool AArch64FastISel::selectIndirectBr(const Instruction *I) { | |||
2509 | const IndirectBrInst *BI = cast<IndirectBrInst>(I); | |||
2510 | unsigned AddrReg = getRegForValue(BI->getOperand(0)); | |||
2511 | if (AddrReg == 0) | |||
2512 | return false; | |||
2513 | ||||
2514 | // Emit the indirect branch. | |||
2515 | const MCInstrDesc &II = TII.get(AArch64::BR); | |||
2516 | AddrReg = constrainOperandRegClass(II, AddrReg, II.getNumDefs()); | |||
2517 | BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, II).addReg(AddrReg); | |||
2518 | ||||
2519 | // Make sure the CFG is up-to-date. | |||
2520 | for (auto *Succ : BI->successors()) | |||
2521 | FuncInfo.MBB->addSuccessor(FuncInfo.MBBMap[Succ]); | |||
2522 | ||||
2523 | return true; | |||
2524 | } | |||
2525 | ||||
2526 | bool AArch64FastISel::selectCmp(const Instruction *I) { | |||
2527 | const CmpInst *CI = cast<CmpInst>(I); | |||
2528 | ||||
2529 | // Vectors of i1 are weird: bail out. | |||
2530 | if (CI->getType()->isVectorTy()) | |||
2531 | return false; | |||
2532 | ||||
2533 | // Try to optimize or fold the cmp. | |||
2534 | CmpInst::Predicate Predicate = optimizeCmpPredicate(CI); | |||
2535 | unsigned ResultReg = 0; | |||
2536 | switch (Predicate) { | |||
2537 | default: | |||
2538 | break; | |||
2539 | case CmpInst::FCMP_FALSE: | |||
2540 | ResultReg = createResultReg(&AArch64::GPR32RegClass); | |||
2541 | BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, | |||
2542 | TII.get(TargetOpcode::COPY), ResultReg) | |||
2543 | .addReg(AArch64::WZR, getKillRegState(true)); | |||
2544 | break; | |||
2545 | case CmpInst::FCMP_TRUE: | |||
2546 | ResultReg = fastEmit_i(MVT::i32, MVT::i32, ISD::Constant, 1); | |||
2547 | break; | |||
2548 | } | |||
2549 | ||||
2550 | if (ResultReg) { | |||
2551 | updateValueMap(I, ResultReg); | |||
2552 | return true; | |||
2553 | } | |||
2554 | ||||
2555 | // Emit the cmp. | |||
2556 | if (!emitCmp(CI->getOperand(0), CI->getOperand(1), CI->isUnsigned())) | |||
2557 | return false; | |||
2558 | ||||
2559 | ResultReg = createResultReg(&AArch64::GPR32RegClass); | |||
2560 | ||||
2561 | // FCMP_UEQ and FCMP_ONE cannot be checked with a single instruction. These | |||
2562 | // condition codes are inverted, because they are used by CSINC. | |||
2563 | static unsigned CondCodeTable[2][2] = { | |||
2564 | { AArch64CC::NE, AArch64CC::VC }, | |||
2565 | { AArch64CC::PL, AArch64CC::LE } | |||
2566 | }; | |||
2567 | unsigned *CondCodes = nullptr; | |||
2568 | switch (Predicate) { | |||
2569 | default: | |||
2570 | break; | |||
2571 | case CmpInst::FCMP_UEQ: | |||
2572 | CondCodes = &CondCodeTable[0][0]; | |||
2573 | break; | |||
2574 | case CmpInst::FCMP_ONE: | |||
2575 | CondCodes = &CondCodeTable[1][0]; | |||
2576 | break; | |||
2577 | } | |||
2578 | ||||
2579 | if (CondCodes) { | |||
2580 | unsigned TmpReg1 = createResultReg(&AArch64::GPR32RegClass); | |||
2581 | BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(AArch64::CSINCWr), | |||
2582 | TmpReg1) | |||
2583 | .addReg(AArch64::WZR, getKillRegState(true)) | |||
2584 | .addReg(AArch64::WZR, getKillRegState(true)) | |||
2585 | .addImm(CondCodes[0]); | |||
2586 | BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(AArch64::CSINCWr), | |||
2587 | ResultReg) | |||
2588 | .addReg(TmpReg1, getKillRegState(true)) | |||
2589 | .addReg(AArch64::WZR, getKillRegState(true)) | |||
2590 | .addImm(CondCodes[1]); | |||
2591 | ||||
2592 | updateValueMap(I, ResultReg); | |||
2593 | return true; | |||
2594 | } | |||
2595 | ||||
2596 | // Now set a register based on the comparison. | |||
2597 | AArch64CC::CondCode CC = getCompareCC(Predicate); | |||
2598 | assert((CC != AArch64CC::AL) && "Unexpected condition code.")(static_cast <bool> ((CC != AArch64CC::AL) && "Unexpected condition code." ) ? void (0) : __assert_fail ("(CC != AArch64CC::AL) && \"Unexpected condition code.\"" , "/build/llvm-toolchain-snapshot-7~svn326246/lib/Target/AArch64/AArch64FastISel.cpp" , 2598, __extension__ __PRETTY_FUNCTION__)); | |||
2599 | AArch64CC::CondCode invertedCC = getInvertedCondCode(CC); | |||
2600 | BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(AArch64::CSINCWr), | |||
2601 | ResultReg) | |||
2602 | .addReg(AArch64::WZR, getKillRegState(true)) | |||
2603 | .addReg(AArch64::WZR, getKillRegState(true)) | |||
2604 | .addImm(invertedCC); | |||
2605 | ||||
2606 | updateValueMap(I, ResultReg); | |||
2607 | return true; | |||
2608 | } | |||
2609 | ||||
2610 | /// \brief Optimize selects of i1 if one of the operands has a 'true' or 'false' | |||
2611 | /// value. | |||
2612 | bool AArch64FastISel::optimizeSelect(const SelectInst *SI) { | |||
2613 | if (!SI->getType()->isIntegerTy(1)) | |||
2614 | return false; | |||
2615 | ||||
2616 | const Value *Src1Val, *Src2Val; | |||
2617 | unsigned Opc = 0; | |||
2618 | bool NeedExtraOp = false; | |||
2619 | if (auto *CI = dyn_cast<ConstantInt>(SI->getTrueValue())) { | |||
2620 | if (CI->isOne()) { | |||
2621 | Src1Val = SI->getCondition(); | |||
2622 | Src2Val = SI->getFalseValue(); | |||
2623 | Opc = AArch64::ORRWrr; | |||
2624 | } else { | |||
2625 | assert(CI->isZero())(static_cast <bool> (CI->isZero()) ? void (0) : __assert_fail ("CI->isZero()", "/build/llvm-toolchain-snapshot-7~svn326246/lib/Target/AArch64/AArch64FastISel.cpp" , 2625, __extension__ __PRETTY_FUNCTION__)); | |||
2626 | Src1Val = SI->getFalseValue(); | |||
2627 | Src2Val = SI->getCondition(); | |||
2628 | Opc = AArch64::BICWrr; | |||
2629 | } | |||
2630 | } else if (auto *CI = dyn_cast<ConstantInt>(SI->getFalseValue())) { | |||
2631 | if (CI->isOne()) { | |||
2632 | Src1Val = SI->getCondition(); | |||
2633 | Src2Val = SI->getTrueValue(); | |||
2634 | Opc = AArch64::ORRWrr; | |||
2635 | NeedExtraOp = true; | |||
2636 | } else { | |||
2637 | assert(CI->isZero())(static_cast <bool> (CI->isZero()) ? void (0) : __assert_fail ("CI->isZero()", "/build/llvm-toolchain-snapshot-7~svn326246/lib/Target/AArch64/AArch64FastISel.cpp" , 2637, __extension__ __PRETTY_FUNCTION__)); | |||
2638 | Src1Val = SI->getCondition(); | |||
2639 | Src2Val = SI->getTrueValue(); | |||
2640 | Opc = AArch64::ANDWrr; | |||
2641 | } | |||
2642 | } | |||
2643 | ||||
2644 | if (!Opc) | |||
2645 | return false; | |||
2646 | ||||
2647 | unsigned Src1Reg = getRegForValue(Src1Val); | |||
2648 | if (!Src1Reg) | |||
2649 | return false; | |||
2650 | bool Src1IsKill = hasTrivialKill(Src1Val); | |||
2651 | ||||
2652 | unsigned Src2Reg = getRegForValue(Src2Val); | |||
2653 | if (!Src2Reg) | |||
2654 | return false; | |||
2655 | bool Src2IsKill = hasTrivialKill(Src2Val); | |||
2656 | ||||
2657 | if (NeedExtraOp) { | |||
2658 | Src1Reg = emitLogicalOp_ri(ISD::XOR, MVT::i32, Src1Reg, Src1IsKill, 1); | |||
2659 | Src1IsKill = true; | |||
2660 | } | |||
2661 | unsigned ResultReg = fastEmitInst_rr(Opc, &AArch64::GPR32RegClass, Src1Reg, | |||
2662 | Src1IsKill, Src2Reg, Src2IsKill); | |||
2663 | updateValueMap(SI, ResultReg); | |||
2664 | return true; | |||
2665 | } | |||
2666 | ||||
2667 | bool AArch64FastISel::selectSelect(const Instruction *I) { | |||
2668 | assert(isa<SelectInst>(I) && "Expected a select instruction.")(static_cast <bool> (isa<SelectInst>(I) && "Expected a select instruction.") ? void (0) : __assert_fail ("isa<SelectInst>(I) && \"Expected a select instruction.\"" , "/build/llvm-toolchain-snapshot-7~svn326246/lib/Target/AArch64/AArch64FastISel.cpp" , 2668, __extension__ __PRETTY_FUNCTION__)); | |||
2669 | MVT VT; | |||
2670 | if (!isTypeSupported(I->getType(), VT)) | |||
2671 | return false; | |||
2672 | ||||
2673 | unsigned Opc; | |||
2674 | const TargetRegisterClass *RC; | |||
2675 | switch (VT.SimpleTy) { | |||
2676 | default: | |||
2677 | return false; | |||
2678 | case MVT::i1: | |||
2679 | case MVT::i8: | |||
2680 | case MVT::i16: | |||
2681 | case MVT::i32: | |||
2682 | Opc = AArch64::CSELWr; | |||
2683 | RC = &AArch64::GPR32RegClass; | |||
2684 | break; | |||
2685 | case MVT::i64: | |||
2686 | Opc = AArch64::CSELXr; | |||
2687 | RC = &AArch64::GPR64RegClass; | |||
2688 | break; | |||
2689 | case MVT::f32: | |||
2690 | Opc = AArch64::FCSELSrrr; | |||
2691 | RC = &AArch64::FPR32RegClass; | |||
2692 | break; | |||
2693 | case MVT::f64: | |||
2694 | Opc = AArch64::FCSELDrrr; | |||
2695 | RC = &AArch64::FPR64RegClass; | |||
2696 | break; | |||
2697 | } | |||
2698 | ||||
2699 | const SelectInst *SI = cast<SelectInst>(I); | |||
2700 | const Value *Cond = SI->getCondition(); | |||
2701 | AArch64CC::CondCode CC = AArch64CC::NE; | |||
2702 | AArch64CC::CondCode ExtraCC = AArch64CC::AL; | |||
2703 | ||||
2704 | if (optimizeSelect(SI)) | |||
2705 | return true; | |||
2706 | ||||
2707 | // Try to pickup the flags, so we don't have to emit another compare. | |||
2708 | if (foldXALUIntrinsic(CC, I, Cond)) { | |||
2709 | // Fake request the condition to force emission of the XALU intrinsic. | |||
2710 | unsigned CondReg = getRegForValue(Cond); | |||
2711 | if (!CondReg) | |||
2712 | return false; | |||
2713 | } else if (isa<CmpInst>(Cond) && cast<CmpInst>(Cond)->hasOneUse() && | |||
2714 | isValueAvailable(Cond)) { | |||
2715 | const auto *Cmp = cast<CmpInst>(Cond); | |||
2716 | // Try to optimize or fold the cmp. | |||
2717 | CmpInst::Predicate Predicate = optimizeCmpPredicate(Cmp); | |||
2718 | const Value *FoldSelect = nullptr; | |||
2719 | switch (Predicate) { | |||
2720 | default: | |||
2721 | break; | |||
2722 | case CmpInst::FCMP_FALSE: | |||
2723 | FoldSelect = SI->getFalseValue(); | |||
2724 | break; | |||
2725 | case CmpInst::FCMP_TRUE: | |||
2726 | FoldSelect = SI->getTrueValue(); | |||
2727 | break; | |||
2728 | } | |||
2729 | ||||
2730 | if (FoldSelect) { | |||
2731 | unsigned SrcReg = getRegForValue(FoldSelect); | |||
2732 | if (!SrcReg) | |||
2733 | return false; | |||
2734 | unsigned UseReg = lookUpRegForValue(SI); | |||
2735 | if (UseReg) | |||
2736 | MRI.clearKillFlags(UseReg); | |||
2737 | ||||
2738 | updateValueMap(I, SrcReg); | |||
2739 | return true; | |||
2740 | } | |||
2741 | ||||
2742 | // Emit the cmp. | |||
2743 | if (!emitCmp(Cmp->getOperand(0), Cmp->getOperand(1), Cmp->isUnsigned())) | |||
2744 | return false; | |||
2745 | ||||
2746 | // FCMP_UEQ and FCMP_ONE cannot be checked with a single select instruction. | |||
2747 | CC = getCompareCC(Predicate); | |||
2748 | switch (Predicate) { | |||
2749 | default: | |||
2750 | break; | |||
2751 | case CmpInst::FCMP_UEQ: | |||
2752 | ExtraCC = AArch64CC::EQ; | |||
2753 | CC = AArch64CC::VS; | |||
2754 | break; | |||
2755 | case CmpInst::FCMP_ONE: | |||
2756 | ExtraCC = AArch64CC::MI; | |||
2757 | CC = AArch64CC::GT; | |||
2758 | break; | |||
2759 | } | |||
2760 | assert((CC != AArch64CC::AL) && "Unexpected condition code.")(static_cast <bool> ((CC != AArch64CC::AL) && "Unexpected condition code." ) ? void (0) : __assert_fail ("(CC != AArch64CC::AL) && \"Unexpected condition code.\"" , "/build/llvm-toolchain-snapshot-7~svn326246/lib/Target/AArch64/AArch64FastISel.cpp" , 2760, __extension__ __PRETTY_FUNCTION__)); | |||
2761 | } else { | |||
2762 | unsigned CondReg = getRegForValue(Cond); | |||
2763 | if (!CondReg) | |||
2764 | return false; | |||
2765 | bool CondIsKill = hasTrivialKill(Cond); | |||
2766 | ||||
2767 | const MCInstrDesc &II = TII.get(AArch64::ANDSWri); | |||
2768 | CondReg = constrainOperandRegClass(II, CondReg, 1); | |||
2769 | ||||
2770 | // Emit a TST instruction (ANDS wzr, reg, #imm). | |||
2771 | BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, II, | |||
2772 | AArch64::WZR) | |||
2773 | .addReg(CondReg, getKillRegState(CondIsKill)) | |||
2774 | .addImm(AArch64_AM::encodeLogicalImmediate(1, 32)); | |||
2775 | } | |||
2776 | ||||
2777 | unsigned Src1Reg = getRegForValue(SI->getTrueValue()); | |||
2778 | bool Src1IsKill = hasTrivialKill(SI->getTrueValue()); | |||
2779 | ||||
2780 | unsigned Src2Reg = getRegForValue(SI->getFalseValue()); | |||
2781 | bool Src2IsKill = hasTrivialKill(SI->getFalseValue()); | |||
2782 | ||||
2783 | if (!Src1Reg || !Src2Reg) | |||
2784 | return false; | |||
2785 | ||||
2786 | if (ExtraCC != AArch64CC::AL) { | |||
2787 | Src2Reg = fastEmitInst_rri(Opc, RC, Src1Reg, Src1IsKill, Src2Reg, | |||
2788 | Src2IsKill, ExtraCC); | |||
2789 | Src2IsKill = true; | |||
2790 | } | |||
2791 | unsigned ResultReg = fastEmitInst_rri(Opc, RC, Src1Reg, Src1IsKill, Src2Reg, | |||
2792 | Src2IsKill, CC); | |||
2793 | updateValueMap(I, ResultReg); | |||
2794 | return true; | |||
2795 | } | |||
2796 | ||||
2797 | bool AArch64FastISel::selectFPExt(const Instruction *I) { | |||
2798 | Value *V = I->getOperand(0); | |||
2799 | if (!I->getType()->isDoubleTy() || !V->getType()->isFloatTy()) | |||
2800 | return false; | |||
2801 | ||||
2802 | unsigned Op = getRegForValue(V); | |||
2803 | if (Op == 0) | |||
2804 | return false; | |||
2805 | ||||
2806 | unsigned ResultReg = createResultReg(&AArch64::FPR64RegClass); | |||
2807 | BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(AArch64::FCVTDSr), | |||
2808 | ResultReg).addReg(Op); | |||
2809 | updateValueMap(I, ResultReg); | |||
2810 | return true; | |||
2811 | } | |||
2812 | ||||
2813 | bool AArch64FastISel::selectFPTrunc(const Instruction *I) { | |||
2814 | Value *V = I->getOperand(0); | |||
2815 | if (!I->getType()->isFloatTy() || !V->getType()->isDoubleTy()) | |||
2816 | return false; | |||
2817 | ||||
2818 | unsigned Op = getRegForValue(V); | |||
2819 | if (Op == 0) | |||
2820 | return false; | |||
2821 | ||||
2822 | unsigned ResultReg = createResultReg(&AArch64::FPR32RegClass); | |||
2823 | BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(AArch64::FCVTSDr), | |||
2824 | ResultReg).addReg(Op); | |||
2825 | updateValueMap(I, ResultReg); | |||
2826 | return true; | |||
2827 | } | |||
2828 | ||||
2829 | // FPToUI and FPToSI | |||
2830 | bool AArch64FastISel::selectFPToInt(const Instruction *I, bool Signed) { | |||
2831 | MVT DestVT; | |||
2832 | if (!isTypeLegal(I->getType(), DestVT) || DestVT.isVector()) | |||
2833 | return false; | |||
2834 | ||||
2835 | unsigned SrcReg = getRegForValue(I->getOperand(0)); | |||
2836 | if (SrcReg == 0) | |||
2837 | return false; | |||
2838 | ||||
2839 | EVT SrcVT = TLI.getValueType(DL, I->getOperand(0)->getType(), true); | |||
2840 | if (SrcVT == MVT::f128 || SrcVT == MVT::f16) | |||
2841 | return false; | |||
2842 | ||||
2843 | unsigned Opc; | |||
2844 | if (SrcVT == MVT::f64) { | |||
2845 | if (Signed) | |||
2846 | Opc = (DestVT == MVT::i32) ? AArch64::FCVTZSUWDr : AArch64::FCVTZSUXDr; | |||
2847 | else | |||
2848 | Opc = (DestVT == MVT::i32) ? AArch64::FCVTZUUWDr : AArch64::FCVTZUUXDr; | |||
2849 | } else { | |||
2850 | if (Signed) | |||
2851 | Opc = (DestVT == MVT::i32) ? AArch64::FCVTZSUWSr : AArch64::FCVTZSUXSr; | |||
2852 | else | |||
2853 | Opc = (DestVT == MVT::i32) ? AArch64::FCVTZUUWSr : AArch64::FCVTZUUXSr; | |||
2854 | } | |||
2855 | unsigned ResultReg = createResultReg( | |||
2856 | DestVT == MVT::i32 ? &AArch64::GPR32RegClass : &AArch64::GPR64RegClass); | |||
2857 | BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(Opc), ResultReg) | |||
2858 | .addReg(SrcReg); | |||
2859 | updateValueMap(I, ResultReg); | |||
2860 | return true; | |||
2861 | } | |||
2862 | ||||
2863 | bool AArch64FastISel::selectIntToFP(const Instruction *I, bool Signed) { | |||
2864 | MVT DestVT; | |||
2865 | if (!isTypeLegal(I->getType(), DestVT) || DestVT.isVector()) | |||
2866 | return false; | |||
2867 | // Let regular ISEL handle FP16 | |||
2868 | if (DestVT == MVT::f16) | |||
2869 | return false; | |||
2870 | ||||
2871 | assert((DestVT == MVT::f32 || DestVT == MVT::f64) &&(static_cast <bool> ((DestVT == MVT::f32 || DestVT == MVT ::f64) && "Unexpected value type.") ? void (0) : __assert_fail ("(DestVT == MVT::f32 || DestVT == MVT::f64) && \"Unexpected value type.\"" , "/build/llvm-toolchain-snapshot-7~svn326246/lib/Target/AArch64/AArch64FastISel.cpp" , 2872, __extension__ __PRETTY_FUNCTION__)) | |||
2872 | "Unexpected value type.")(static_cast <bool> ((DestVT == MVT::f32 || DestVT == MVT ::f64) && "Unexpected value type.") ? void (0) : __assert_fail ("(DestVT == MVT::f32 || DestVT == MVT::f64) && \"Unexpected value type.\"" , "/build/llvm-toolchain-snapshot-7~svn326246/lib/Target/AArch64/AArch64FastISel.cpp" , 2872, __extension__ __PRETTY_FUNCTION__)); | |||
2873 | ||||
2874 | unsigned SrcReg = getRegForValue(I->getOperand(0)); | |||
2875 | if (!SrcReg) | |||
2876 | return false; | |||
2877 | bool SrcIsKill = hasTrivialKill(I->getOperand(0)); | |||
2878 | ||||
2879 | EVT SrcVT = TLI.getValueType(DL, I->getOperand(0)->getType(), true); | |||
2880 | ||||
2881 | // Handle sign-extension. | |||
2882 | if (SrcVT == MVT::i16 || SrcVT == MVT::i8 || SrcVT == MVT::i1) { | |||
2883 | SrcReg = | |||
2884 | emitIntExt(SrcVT.getSimpleVT(), SrcReg, MVT::i32, /*isZExt*/ !Signed); | |||
2885 | if (!SrcReg) | |||
2886 | return false; | |||
2887 | SrcIsKill = true; | |||
2888 | } | |||
2889 | ||||
2890 | unsigned Opc; | |||
2891 | if (SrcVT == MVT::i64) { | |||
2892 | if (Signed) | |||
2893 | Opc = (DestVT == MVT::f32) ? AArch64::SCVTFUXSri : AArch64::SCVTFUXDri; | |||
2894 | else | |||
2895 | Opc = (DestVT == MVT::f32) ? AArch64::UCVTFUXSri : AArch64::UCVTFUXDri; | |||
2896 | } else { | |||
2897 | if (Signed) | |||
2898 | Opc = (DestVT == MVT::f32) ? AArch64::SCVTFUWSri : AArch64::SCVTFUWDri; | |||
2899 | else | |||
2900 | Opc = (DestVT == MVT::f32) ? AArch64::UCVTFUWSri : AArch64::UCVTFUWDri; | |||
2901 | } | |||
2902 | ||||
2903 | unsigned ResultReg = fastEmitInst_r(Opc, TLI.getRegClassFor(DestVT), SrcReg, | |||
2904 | SrcIsKill); | |||
2905 | updateValueMap(I, ResultReg); | |||
2906 | return true; | |||
2907 | } | |||
2908 | ||||
2909 | bool AArch64FastISel::fastLowerArguments() { | |||
2910 | if (!FuncInfo.CanLowerReturn) | |||
2911 | return false; | |||
2912 | ||||
2913 | const Function *F = FuncInfo.Fn; | |||
2914 | if (F->isVarArg()) | |||
2915 | return false; | |||
2916 | ||||
2917 | CallingConv::ID CC = F->getCallingConv(); | |||
2918 | if (CC != CallingConv::C && CC != CallingConv::Swift) | |||
2919 | return false; | |||
2920 | ||||
2921 | // Only handle simple cases of up to 8 GPR and FPR each. | |||
2922 | unsigned GPRCnt = 0; | |||
2923 | unsigned FPRCnt = 0; | |||
2924 | for (auto const &Arg : F->args()) { | |||
2925 | if (Arg.hasAttribute(Attribute::ByVal) || | |||
2926 | Arg.hasAttribute(Attribute::InReg) || | |||
2927 | Arg.hasAttribute(Attribute::StructRet) || | |||
2928 | Arg.hasAttribute(Attribute::SwiftSelf) || | |||
2929 | Arg.hasAttribute(Attribute::SwiftError) || | |||
2930 | Arg.hasAttribute(Attribute::Nest)) | |||
2931 | return false; | |||
2932 | ||||
2933 | Type *ArgTy = Arg.getType(); | |||
2934 | if (ArgTy->isStructTy() || ArgTy->isArrayTy()) | |||
2935 | return false; | |||
2936 | ||||
2937 | EVT ArgVT = TLI.getValueType(DL, ArgTy); | |||
2938 | if (!ArgVT.isSimple()) | |||
2939 | return false; | |||
2940 | ||||
2941 | MVT VT = ArgVT.getSimpleVT().SimpleTy; | |||
2942 | if (VT.isFloatingPoint() && !Subtarget->hasFPARMv8()) | |||
2943 | return false; | |||
2944 | ||||
2945 | if (VT.isVector() && | |||
2946 | (!Subtarget->hasNEON() || !Subtarget->isLittleEndian())) | |||
2947 | return false; | |||
2948 | ||||
2949 | if (VT >= MVT::i1 && VT <= MVT::i64) | |||
2950 | ++GPRCnt; | |||
2951 | else if ((VT >= MVT::f16 && VT <= MVT::f64) || VT.is64BitVector() || | |||
2952 | VT.is128BitVector()) | |||
2953 | ++FPRCnt; | |||
2954 | else | |||
2955 | return false; | |||
2956 | ||||
2957 | if (GPRCnt > 8 || FPRCnt > 8) | |||
2958 | return false; | |||
2959 | } | |||
2960 | ||||
2961 | static const MCPhysReg Registers[6][8] = { | |||
2962 | { AArch64::W0, AArch64::W1, AArch64::W2, AArch64::W3, AArch64::W4, | |||
2963 | AArch64::W5, AArch64::W6, AArch64::W7 }, | |||
2964 | { AArch64::X0, AArch64::X1, AArch64::X2, AArch64::X3, AArch64::X4, | |||
2965 | AArch64::X5, AArch64::X6, AArch64::X7 }, | |||
2966 | { AArch64::H0, AArch64::H1, AArch64::H2, AArch64::H3, AArch64::H4, | |||
2967 | AArch64::H5, AArch64::H6, AArch64::H7 }, | |||
2968 | { AArch64::S0, AArch64::S1, AArch64::S2, AArch64::S3, AArch64::S4, | |||
2969 | AArch64::S5, AArch64::S6, AArch64::S7 }, | |||
2970 | { AArch64::D0, AArch64::D1, AArch64::D2, AArch64::D3, AArch64::D4, | |||
2971 | AArch64::D5, AArch64::D6, AArch64::D7 }, | |||
2972 | { AArch64::Q0, AArch64::Q1, AArch64::Q2, AArch64::Q3, AArch64::Q4, | |||
2973 | AArch64::Q5, AArch64::Q6, AArch64::Q7 } | |||
2974 | }; | |||
2975 | ||||
2976 | unsigned GPRIdx = 0; | |||
2977 | unsigned FPRIdx = 0; | |||
2978 | for (auto const &Arg : F->args()) { | |||
2979 | MVT VT = TLI.getSimpleValueType(DL, Arg.getType()); | |||
2980 | unsigned SrcReg; | |||
2981 | const TargetRegisterClass *RC; | |||
2982 | if (VT >= MVT::i1 && VT <= MVT::i32) { | |||
2983 | SrcReg = Registers[0][GPRIdx++]; | |||
2984 | RC = &AArch64::GPR32RegClass; | |||
2985 | VT = MVT::i32; | |||
2986 | } else if (VT == MVT::i64) { | |||
2987 | SrcReg = Registers[1][GPRIdx++]; | |||
2988 | RC = &AArch64::GPR64RegClass; | |||
2989 | } else if (VT == MVT::f16) { | |||
2990 | SrcReg = Registers[2][FPRIdx++]; | |||
2991 | RC = &AArch64::FPR16RegClass; | |||
2992 | } else if (VT == MVT::f32) { | |||
2993 | SrcReg = Registers[3][FPRIdx++]; | |||
2994 | RC = &AArch64::FPR32RegClass; | |||
2995 | } else if ((VT == MVT::f64) || VT.is64BitVector()) { | |||
2996 | SrcReg = Registers[4][FPRIdx++]; | |||
2997 | RC = &AArch64::FPR64RegClass; | |||
2998 | } else if (VT.is128BitVector()) { | |||
2999 | SrcReg = Registers[5][FPRIdx++]; | |||
3000 | RC = &AArch64::FPR128RegClass; | |||
3001 | } else | |||
3002 | llvm_unreachable("Unexpected value type.")::llvm::llvm_unreachable_internal("Unexpected value type.", "/build/llvm-toolchain-snapshot-7~svn326246/lib/Target/AArch64/AArch64FastISel.cpp" , 3002); | |||
3003 | ||||
3004 | unsigned DstReg = FuncInfo.MF->addLiveIn(SrcReg, RC); | |||
3005 | // FIXME: Unfortunately it's necessary to emit a copy from the livein copy. | |||
3006 | // Without this, EmitLiveInCopies may eliminate the livein if its only | |||
3007 | // use is a bitcast (which isn't turned into an instruction). | |||
3008 | unsigned ResultReg = createResultReg(RC); | |||
3009 | BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, | |||
3010 | TII.get(TargetOpcode::COPY), ResultReg) | |||
3011 | .addReg(DstReg, getKillRegState(true)); | |||
3012 | updateValueMap(&Arg, ResultReg); | |||
3013 | } | |||
3014 | return true; | |||
3015 | } | |||
3016 | ||||
3017 | bool AArch64FastISel::processCallArgs(CallLoweringInfo &CLI, | |||
3018 | SmallVectorImpl<MVT> &OutVTs, | |||
3019 | unsigned &NumBytes) { | |||
3020 | CallingConv::ID CC = CLI.CallConv; | |||
3021 | SmallVector<CCValAssign, 16> ArgLocs; | |||
3022 | CCState CCInfo(CC, false, *FuncInfo.MF, ArgLocs, *Context); | |||
3023 | CCInfo.AnalyzeCallOperands(OutVTs, CLI.OutFlags, CCAssignFnForCall(CC)); | |||
3024 | ||||
3025 | // Get a count of how many bytes are to be pushed on the stack. | |||
3026 | NumBytes = CCInfo.getNextStackOffset(); | |||
3027 | ||||
3028 | // Issue CALLSEQ_START | |||
3029 | unsigned AdjStackDown = TII.getCallFrameSetupOpcode(); | |||
3030 | BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(AdjStackDown)) | |||
3031 | .addImm(NumBytes).addImm(0); | |||
3032 | ||||
3033 | // Process the args. | |||
3034 | for (CCValAssign &VA : ArgLocs) { | |||
3035 | const Value *ArgVal = CLI.OutVals[VA.getValNo()]; | |||
3036 | MVT ArgVT = OutVTs[VA.getValNo()]; | |||
3037 | ||||
3038 | unsigned ArgReg = getRegForValue(ArgVal); | |||
3039 | if (!ArgReg) | |||
3040 | return false; | |||
3041 | ||||
3042 | // Handle arg promotion: SExt, ZExt, AExt. | |||
3043 | switch (VA.getLocInfo()) { | |||
3044 | case CCValAssign::Full: | |||
3045 | break; | |||
3046 | case CCValAssign::SExt: { | |||
3047 | MVT DestVT = VA.getLocVT(); | |||
3048 | MVT SrcVT = ArgVT; | |||
3049 | ArgReg = emitIntExt(SrcVT, ArgReg, DestVT, /*isZExt=*/false); | |||
3050 | if (!ArgReg) | |||
3051 | return false; | |||
3052 | break; | |||
3053 | } | |||
3054 | case CCValAssign::AExt: | |||
3055 | // Intentional fall-through. | |||
3056 | case CCValAssign::ZExt: { | |||
3057 | MVT DestVT = VA.getLocVT(); | |||
3058 | MVT SrcVT = ArgVT; | |||
3059 | ArgReg = emitIntExt(SrcVT, ArgReg, DestVT, /*isZExt=*/true); | |||
3060 | if (!ArgReg) | |||
3061 | return false; | |||
3062 | break; | |||
3063 | } | |||
3064 | default: | |||
3065 | llvm_unreachable("Unknown arg promotion!")::llvm::llvm_unreachable_internal("Unknown arg promotion!", "/build/llvm-toolchain-snapshot-7~svn326246/lib/Target/AArch64/AArch64FastISel.cpp" , 3065); | |||
3066 | } | |||
3067 | ||||
3068 | // Now copy/store arg to correct locations. | |||
3069 | if (VA.isRegLoc() && !VA.needsCustom()) { | |||
3070 | BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, | |||
3071 | TII.get(TargetOpcode::COPY), VA.getLocReg()).addReg(ArgReg); | |||
3072 | CLI.OutRegs.push_back(VA.getLocReg()); | |||
3073 | } else if (VA.needsCustom()) { | |||
3074 | // FIXME: Handle custom args. | |||
3075 | return false; | |||
3076 | } else { | |||
3077 | assert(VA.isMemLoc() && "Assuming store on stack.")(static_cast <bool> (VA.isMemLoc() && "Assuming store on stack." ) ? void (0) : __assert_fail ("VA.isMemLoc() && \"Assuming store on stack.\"" , "/build/llvm-toolchain-snapshot-7~svn326246/lib/Target/AArch64/AArch64FastISel.cpp" , 3077, __extension__ __PRETTY_FUNCTION__)); | |||
3078 | ||||
3079 | // Don't emit stores for undef values. | |||
3080 | if (isa<UndefValue>(ArgVal)) | |||
3081 | continue; | |||
3082 | ||||
3083 | // Need to store on the stack. | |||
3084 | unsigned ArgSize = (ArgVT.getSizeInBits() + 7) / 8; | |||
3085 | ||||
3086 | unsigned BEAlign = 0; | |||
3087 | if (ArgSize < 8 && !Subtarget->isLittleEndian()) | |||
3088 | BEAlign = 8 - ArgSize; | |||
3089 | ||||
3090 | Address Addr; | |||
3091 | Addr.setKind(Address::RegBase); | |||
3092 | Addr.setReg(AArch64::SP); | |||
3093 | Addr.setOffset(VA.getLocMemOffset() + BEAlign); | |||
3094 | ||||
3095 | unsigned Alignment = DL.getABITypeAlignment(ArgVal->getType()); | |||
3096 | MachineMemOperand *MMO = FuncInfo.MF->getMachineMemOperand( | |||
3097 | MachinePointerInfo::getStack(*FuncInfo.MF, Addr.getOffset()), | |||
3098 | MachineMemOperand::MOStore, ArgVT.getStoreSize(), Alignment); | |||
3099 | ||||
3100 | if (!emitStore(ArgVT, ArgReg, Addr, MMO)) | |||
3101 | return false; | |||
3102 | } | |||
3103 | } | |||
3104 | return true; | |||
3105 | } | |||
3106 | ||||
3107 | bool AArch64FastISel::finishCall(CallLoweringInfo &CLI, MVT RetVT, | |||
3108 | unsigned NumBytes) { | |||
3109 | CallingConv::ID CC = CLI.CallConv; | |||
3110 | ||||
3111 | // Issue CALLSEQ_END | |||
3112 | unsigned AdjStackUp = TII.getCallFrameDestroyOpcode(); | |||
3113 | BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(AdjStackUp)) | |||
3114 | .addImm(NumBytes).addImm(0); | |||
3115 | ||||
3116 | // Now the return value. | |||
3117 | if (RetVT != MVT::isVoid) { | |||
3118 | SmallVector<CCValAssign, 16> RVLocs; | |||
3119 | CCState CCInfo(CC, false, *FuncInfo.MF, RVLocs, *Context); | |||
3120 | CCInfo.AnalyzeCallResult(RetVT, CCAssignFnForCall(CC)); | |||
3121 | ||||
3122 | // Only handle a single return value. | |||
3123 | if (RVLocs.size() != 1) | |||
3124 | return false; | |||
3125 | ||||
3126 | // Copy all of the result registers out of their specified physreg. | |||
3127 | MVT CopyVT = RVLocs[0].getValVT(); | |||
3128 | ||||
3129 | // TODO: Handle big-endian results | |||
3130 | if (CopyVT.isVector() && !Subtarget->isLittleEndian()) | |||
3131 | return false; | |||
3132 | ||||
3133 | unsigned ResultReg = createResultReg(TLI.getRegClassFor(CopyVT)); | |||
3134 | BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, | |||
3135 | TII.get(TargetOpcode::COPY), ResultReg) | |||
3136 | .addReg(RVLocs[0].getLocReg()); | |||
3137 | CLI.InRegs.push_back(RVLocs[0].getLocReg()); | |||
3138 | ||||
3139 | CLI.ResultReg = ResultReg; | |||
3140 | CLI.NumResultRegs = 1; | |||
3141 | } | |||
3142 | ||||
3143 | return true; | |||
3144 | } | |||
3145 | ||||
3146 | bool AArch64FastISel::fastLowerCall(CallLoweringInfo &CLI) { | |||
3147 | CallingConv::ID CC = CLI.CallConv; | |||
3148 | bool IsTailCall = CLI.IsTailCall; | |||
3149 | bool IsVarArg = CLI.IsVarArg; | |||
3150 | const Value *Callee = CLI.Callee; | |||
3151 | MCSymbol *Symbol = CLI.Symbol; | |||
3152 | ||||
3153 | if (!Callee && !Symbol) | |||
3154 | return false; | |||
3155 | ||||
3156 | // Allow SelectionDAG isel to handle tail calls. | |||
3157 | if (IsTailCall) | |||
3158 | return false; | |||
3159 | ||||
3160 | CodeModel::Model CM = TM.getCodeModel(); | |||
3161 | // Only support the small-addressing and large code models. | |||
3162 | if (CM != CodeModel::Large && !Subtarget->useSmallAddressing()) | |||
3163 | return false; | |||
3164 | ||||
3165 | // FIXME: Add large code model support for ELF. | |||
3166 | if (CM == CodeModel::Large && !Subtarget->isTargetMachO()) | |||
3167 | return false; | |||
3168 | ||||
3169 | // Let SDISel handle vararg functions. | |||
3170 | if (IsVarArg) | |||
3171 | return false; | |||
3172 | ||||
3173 | // FIXME: Only handle *simple* calls for now. | |||
3174 | MVT RetVT; | |||
3175 | if (CLI.RetTy->isVoidTy()) | |||
3176 | RetVT = MVT::isVoid; | |||
3177 | else if (!isTypeLegal(CLI.RetTy, RetVT)) | |||
3178 | return false; | |||
3179 | ||||
3180 | for (auto Flag : CLI.OutFlags) | |||
3181 | if (Flag.isInReg() || Flag.isSRet() || Flag.isNest() || Flag.isByVal() || | |||
3182 | Flag.isSwiftSelf() || Flag.isSwiftError()) | |||
3183 | return false; | |||
3184 | ||||
3185 | // Set up the argument vectors. | |||
3186 | SmallVector<MVT, 16> OutVTs; | |||
3187 | OutVTs.reserve(CLI.OutVals.size()); | |||
3188 | ||||
3189 | for (auto *Val : CLI.OutVals) { | |||
3190 | MVT VT; | |||
3191 | if (!isTypeLegal(Val->getType(), VT) && | |||
3192 | !(VT == MVT::i1 || VT == MVT::i8 || VT == MVT::i16)) | |||
3193 | return false; | |||
3194 | ||||
3195 | // We don't handle vector parameters yet. | |||
3196 | if (VT.isVector() || VT.getSizeInBits() > 64) | |||
3197 | return false; | |||
3198 | ||||
3199 | OutVTs.push_back(VT); | |||
3200 | } | |||
3201 | ||||
3202 | Address Addr; | |||
3203 | if (Callee && !computeCallAddress(Callee, Addr)) | |||
3204 | return false; | |||
3205 | ||||
3206 | // Handle the arguments now that we've gotten them. | |||
3207 | unsigned NumBytes; | |||
3208 | if (!processCallArgs(CLI, OutVTs, NumBytes)) | |||
3209 | return false; | |||
3210 | ||||
3211 | // Issue the call. | |||
3212 | MachineInstrBuilder MIB; | |||
3213 | if (Subtarget->useSmallAddressing()) { | |||
3214 | const MCInstrDesc &II = TII.get(Addr.getReg() ? AArch64::BLR : AArch64::BL); | |||
3215 | MIB = BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, II); | |||
3216 | if (Symbol) | |||
3217 | MIB.addSym(Symbol, 0); | |||
3218 | else if (Addr.getGlobalValue()) | |||
3219 | MIB.addGlobalAddress(Addr.getGlobalValue(), 0, 0); | |||
3220 | else if (Addr.getReg()) { | |||
3221 | unsigned Reg = constrainOperandRegClass(II, Addr.getReg(), 0); | |||
3222 | MIB.addReg(Reg); | |||
3223 | } else | |||
3224 | return false; | |||
3225 | } else { | |||
3226 | unsigned CallReg = 0; | |||
3227 | if (Symbol) { | |||
3228 | unsigned ADRPReg = createResultReg(&AArch64::GPR64commonRegClass); | |||
3229 | BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(AArch64::ADRP), | |||
3230 | ADRPReg) | |||
3231 | .addSym(Symbol, AArch64II::MO_GOT | AArch64II::MO_PAGE); | |||
3232 | ||||
3233 | CallReg = createResultReg(&AArch64::GPR64RegClass); | |||
3234 | BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, | |||
3235 | TII.get(AArch64::LDRXui), CallReg) | |||
3236 | .addReg(ADRPReg) | |||
3237 | .addSym(Symbol, | |||
3238 | AArch64II::MO_GOT | AArch64II::MO_PAGEOFF | AArch64II::MO_NC); | |||
3239 | } else if (Addr.getGlobalValue()) | |||
3240 | CallReg = materializeGV(Addr.getGlobalValue()); | |||
3241 | else if (Addr.getReg()) | |||
3242 | CallReg = Addr.getReg(); | |||
3243 | ||||
3244 | if (!CallReg) | |||
3245 | return false; | |||
3246 | ||||
3247 | const MCInstrDesc &II = TII.get(AArch64::BLR); | |||
3248 | CallReg = constrainOperandRegClass(II, CallReg, 0); | |||
3249 | MIB = BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, II).addReg(CallReg); | |||
3250 | } | |||
3251 | ||||
3252 | // Add implicit physical register uses to the call. | |||
3253 | for (auto Reg : CLI.OutRegs) | |||
3254 | MIB.addReg(Reg, RegState::Implicit); | |||
3255 | ||||
3256 | // Add a register mask with the call-preserved registers. | |||
3257 | // Proper defs for return values will be added by setPhysRegsDeadExcept(). | |||
3258 | MIB.addRegMask(TRI.getCallPreservedMask(*FuncInfo.MF, CC)); | |||
3259 | ||||
3260 | CLI.Call = MIB; | |||
3261 | ||||
3262 | // Finish off the call including any return values. | |||
3263 | return finishCall(CLI, RetVT, NumBytes); | |||
3264 | } | |||
3265 | ||||
3266 | bool AArch64FastISel::isMemCpySmall(uint64_t Len, unsigned Alignment) { | |||
3267 | if (Alignment) | |||
3268 | return Len / Alignment <= 4; | |||
3269 | else | |||
3270 | return Len < 32; | |||
3271 | } | |||
3272 | ||||
3273 | bool AArch64FastISel::tryEmitSmallMemCpy(Address Dest, Address Src, | |||
3274 | uint64_t Len, unsigned Alignment) { | |||
3275 | // Make sure we don't bloat code by inlining very large memcpy's. | |||
3276 | if (!isMemCpySmall(Len, Alignment)) | |||
3277 | return false; | |||
3278 | ||||
3279 | int64_t UnscaledOffset = 0; | |||
3280 | Address OrigDest = Dest; | |||
3281 | Address OrigSrc = Src; | |||
3282 | ||||
3283 | while (Len) { | |||
3284 | MVT VT; | |||
3285 | if (!Alignment || Alignment >= 8) { | |||
3286 | if (Len >= 8) | |||
3287 | VT = MVT::i64; | |||
3288 | else if (Len >= 4) | |||
3289 | VT = MVT::i32; | |||
3290 | else if (Len >= 2) | |||
3291 | VT = MVT::i16; | |||
3292 | else { | |||
3293 | VT = MVT::i8; | |||
3294 | } | |||
3295 | } else { | |||
3296 | // Bound based on alignment. | |||
3297 | if (Len >= 4 && Alignment == 4) | |||
3298 | VT = MVT::i32; | |||
3299 | else if (Len >= 2 && Alignment == 2) | |||
3300 | VT = MVT::i16; | |||
3301 | else { | |||
3302 | VT = MVT::i8; | |||
3303 | } | |||
3304 | } | |||
3305 | ||||
3306 | unsigned ResultReg = emitLoad(VT, VT, Src); | |||
3307 | if (!ResultReg) | |||
3308 | return false; | |||
3309 | ||||
3310 | if (!emitStore(VT, ResultReg, Dest)) | |||
3311 | return false; | |||
3312 | ||||
3313 | int64_t Size = VT.getSizeInBits() / 8; | |||
3314 | Len -= Size; | |||
3315 | UnscaledOffset += Size; | |||
3316 | ||||
3317 | // We need to recompute the unscaled offset for each iteration. | |||
3318 | Dest.setOffset(OrigDest.getOffset() + UnscaledOffset); | |||
3319 | Src.setOffset(OrigSrc.getOffset() + UnscaledOffset); | |||
3320 | } | |||
3321 | ||||
3322 | return true; | |||
3323 | } | |||
3324 | ||||
3325 | /// \brief Check if it is possible to fold the condition from the XALU intrinsic | |||
3326 | /// into the user. The condition code will only be updated on success. | |||
3327 | bool AArch64FastISel::foldXALUIntrinsic(AArch64CC::CondCode &CC, | |||
3328 | const Instruction *I, | |||
3329 | const Value *Cond) { | |||
3330 | if (!isa<ExtractValueInst>(Cond)) | |||
3331 | return false; | |||
3332 | ||||
3333 | const auto *EV = cast<ExtractValueInst>(Cond); | |||
3334 | if (!isa<IntrinsicInst>(EV->getAggregateOperand())) | |||
3335 | return false; | |||
3336 | ||||
3337 | const auto *II = cast<IntrinsicInst>(EV->getAggregateOperand()); | |||
3338 | MVT RetVT; | |||
3339 | const Function *Callee = II->getCalledFunction(); | |||
3340 | Type *RetTy = | |||
3341 | cast<StructType>(Callee->getReturnType())->getTypeAtIndex(0U); | |||
3342 | if (!isTypeLegal(RetTy, RetVT)) | |||
3343 | return false; | |||
3344 | ||||
3345 | if (RetVT != MVT::i32 && RetVT != MVT::i64) | |||
3346 | return false; | |||
3347 | ||||
3348 | const Value *LHS = II->getArgOperand(0); | |||
3349 | const Value *RHS = II->getArgOperand(1); | |||
3350 | ||||
3351 | // Canonicalize immediate to the RHS. | |||
3352 | if (isa<ConstantInt>(LHS) && !isa<ConstantInt>(RHS) && | |||
3353 | isCommutativeIntrinsic(II)) | |||
3354 | std::swap(LHS, RHS); | |||
3355 | ||||
3356 | // Simplify multiplies. | |||
3357 | Intrinsic::ID IID = II->getIntrinsicID(); | |||
3358 | switch (IID) { | |||
3359 | default: | |||
3360 | break; | |||
3361 | case Intrinsic::smul_with_overflow: | |||
3362 | if (const auto *C = dyn_cast<ConstantInt>(RHS)) | |||
3363 | if (C->getValue() == 2) | |||
3364 | IID = Intrinsic::sadd_with_overflow; | |||
3365 | break; | |||
3366 | case Intrinsic::umul_with_overflow: | |||
3367 | if (const auto *C = dyn_cast<ConstantInt>(RHS)) | |||
3368 | if (C->getValue() == 2) | |||
3369 | IID = Intrinsic::uadd_with_overflow; | |||
3370 | break; | |||
3371 | } | |||
3372 | ||||
3373 | AArch64CC::CondCode TmpCC; | |||
3374 | switch (IID) { | |||
3375 | default: | |||
3376 | return false; | |||
3377 | case Intrinsic::sadd_with_overflow: | |||
3378 | case Intrinsic::ssub_with_overflow: | |||
3379 | TmpCC = AArch64CC::VS; | |||
3380 | break; | |||
3381 | case Intrinsic::uadd_with_overflow: | |||
3382 | TmpCC = AArch64CC::HS; | |||
3383 | break; | |||
3384 | case Intrinsic::usub_with_overflow: | |||
3385 | TmpCC = AArch64CC::LO; | |||
3386 | break; | |||
3387 | case Intrinsic::smul_with_overflow: | |||
3388 | case Intrinsic::umul_with_overflow: | |||
3389 | TmpCC = AArch64CC::NE; | |||
3390 | break; | |||
3391 | } | |||
3392 | ||||
3393 | // Check if both instructions are in the same basic block. | |||
3394 | if (!isValueAvailable(II)) | |||
3395 | return false; | |||
3396 | ||||
3397 | // Make sure nothing is in the way | |||
3398 | BasicBlock::const_iterator Start(I); | |||
3399 | BasicBlock::const_iterator End(II); | |||
3400 | for (auto Itr = std::prev(Start); Itr != End; --Itr) { | |||
3401 | // We only expect extractvalue instructions between the intrinsic and the | |||
3402 | // instruction to be selected. | |||
3403 | if (!isa<ExtractValueInst>(Itr)) | |||
3404 | return false; | |||
3405 | ||||
3406 | // Check that the extractvalue operand comes from the intrinsic. | |||
3407 | const auto *EVI = cast<ExtractValueInst>(Itr); | |||
3408 | if (EVI->getAggregateOperand() != II) | |||
3409 | return false; | |||
3410 | } | |||
3411 | ||||
3412 | CC = TmpCC; | |||
3413 | return true; | |||
3414 | } | |||
3415 | ||||
3416 | bool AArch64FastISel::fastLowerIntrinsicCall(const IntrinsicInst *II) { | |||
3417 | // FIXME: Handle more intrinsics. | |||
3418 | switch (II->getIntrinsicID()) { | |||
3419 | default: return false; | |||
3420 | case Intrinsic::frameaddress: { | |||
3421 | MachineFrameInfo &MFI = FuncInfo.MF->getFrameInfo(); | |||
3422 | MFI.setFrameAddressIsTaken(true); | |||
3423 | ||||
3424 | const AArch64RegisterInfo *RegInfo = Subtarget->getRegisterInfo(); | |||
3425 | unsigned FramePtr = RegInfo->getFrameRegister(*(FuncInfo.MF)); | |||
3426 | unsigned SrcReg = MRI.createVirtualRegister(&AArch64::GPR64RegClass); | |||
3427 | BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, | |||
3428 | TII.get(TargetOpcode::COPY), SrcReg).addReg(FramePtr); | |||
3429 | // Recursively load frame address | |||
3430 | // ldr x0, [fp] | |||
3431 | // ldr x0, [x0] | |||
3432 | // ldr x0, [x0] | |||
3433 | // ... | |||
3434 | unsigned DestReg; | |||
3435 | unsigned Depth = cast<ConstantInt>(II->getOperand(0))->getZExtValue(); | |||
3436 | while (Depth--) { | |||
3437 | DestReg = fastEmitInst_ri(AArch64::LDRXui, &AArch64::GPR64RegClass, | |||
3438 | SrcReg, /*IsKill=*/true, 0); | |||
3439 | assert(DestReg && "Unexpected LDR instruction emission failure.")(static_cast <bool> (DestReg && "Unexpected LDR instruction emission failure." ) ? void (0) : __assert_fail ("DestReg && \"Unexpected LDR instruction emission failure.\"" , "/build/llvm-toolchain-snapshot-7~svn326246/lib/Target/AArch64/AArch64FastISel.cpp" , 3439, __extension__ __PRETTY_FUNCTION__)); | |||
3440 | SrcReg = DestReg; | |||
3441 | } | |||
3442 | ||||
3443 | updateValueMap(II, SrcReg); | |||
3444 | return true; | |||
3445 | } | |||
3446 | case Intrinsic::memcpy: | |||
3447 | case Intrinsic::memmove: { | |||
3448 | const auto *MTI = cast<MemTransferInst>(II); | |||
3449 | // Don't handle volatile. | |||
3450 | if (MTI->isVolatile()) | |||
3451 | return false; | |||
3452 | ||||
3453 | // Disable inlining for memmove before calls to ComputeAddress. Otherwise, | |||
3454 | // we would emit dead code because we don't currently handle memmoves. | |||
3455 | bool IsMemCpy = (II->getIntrinsicID() == Intrinsic::memcpy); | |||
3456 | if (isa<ConstantInt>(MTI->getLength()) && IsMemCpy) { | |||
3457 | // Small memcpy's are common enough that we want to do them without a call | |||
3458 | // if possible. | |||
3459 | uint64_t Len = cast<ConstantInt>(MTI->getLength())->getZExtValue(); | |||
3460 | unsigned Alignment = MinAlign(MTI->getDestAlignment(), | |||
3461 | MTI->getSourceAlignment()); | |||
3462 | if (isMemCpySmall(Len, Alignment)) { | |||
3463 | Address Dest, Src; | |||
3464 | if (!computeAddress(MTI->getRawDest(), Dest) || | |||
3465 | !computeAddress(MTI->getRawSource(), Src)) | |||
3466 | return false; | |||
3467 | if (tryEmitSmallMemCpy(Dest, Src, Len, Alignment)) | |||
3468 | return true; | |||
3469 | } | |||
3470 | } | |||
3471 | ||||
3472 | if (!MTI->getLength()->getType()->isIntegerTy(64)) | |||
3473 | return false; | |||
3474 | ||||
3475 | if (MTI->getSourceAddressSpace() > 255 || MTI->getDestAddressSpace() > 255) | |||
3476 | // Fast instruction selection doesn't support the special | |||
3477 | // address spaces. | |||
3478 | return false; | |||
3479 | ||||
3480 | const char *IntrMemName = isa<MemCpyInst>(II) ? "memcpy" : "memmove"; | |||
3481 | return lowerCallTo(II, IntrMemName, II->getNumArgOperands() - 1); | |||
3482 | } | |||
3483 | case Intrinsic::memset: { | |||
3484 | const MemSetInst *MSI = cast<MemSetInst>(II); | |||
3485 | // Don't handle volatile. | |||
3486 | if (MSI->isVolatile()) | |||
3487 | return false; | |||
3488 | ||||
3489 | if (!MSI->getLength()->getType()->isIntegerTy(64)) | |||
3490 | return false; | |||
3491 | ||||
3492 | if (MSI->getDestAddressSpace() > 255) | |||
3493 | // Fast instruction selection doesn't support the special | |||
3494 | // address spaces. | |||
3495 | return false; | |||
3496 | ||||
3497 | return lowerCallTo(II, "memset", II->getNumArgOperands() - 1); | |||
3498 | } | |||
3499 | case Intrinsic::sin: | |||
3500 | case Intrinsic::cos: | |||
3501 | case Intrinsic::pow: { | |||
3502 | MVT RetVT; | |||
3503 | if (!isTypeLegal(II->getType(), RetVT)) | |||
3504 | return false; | |||
3505 | ||||
3506 | if (RetVT != MVT::f32 && RetVT != MVT::f64) | |||
3507 | return false; | |||
3508 | ||||
3509 | static const RTLIB::Libcall LibCallTable[3][2] = { | |||
3510 | { RTLIB::SIN_F32, RTLIB::SIN_F64 }, | |||
3511 | { RTLIB::COS_F32, RTLIB::COS_F64 }, | |||
3512 | { RTLIB::POW_F32, RTLIB::POW_F64 } | |||
3513 | }; | |||
3514 | RTLIB::Libcall LC; | |||
3515 | bool Is64Bit = RetVT == MVT::f64; | |||
3516 | switch (II->getIntrinsicID()) { | |||
3517 | default: | |||
3518 | llvm_unreachable("Unexpected intrinsic.")::llvm::llvm_unreachable_internal("Unexpected intrinsic.", "/build/llvm-toolchain-snapshot-7~svn326246/lib/Target/AArch64/AArch64FastISel.cpp" , 3518); | |||
3519 | case Intrinsic::sin: | |||
3520 | LC = LibCallTable[0][Is64Bit]; | |||
3521 | break; | |||
3522 | case Intrinsic::cos: | |||
3523 | LC = LibCallTable[1][Is64Bit]; | |||
3524 | break; | |||
3525 | case Intrinsic::pow: | |||
3526 | LC = LibCallTable[2][Is64Bit]; | |||
3527 | break; | |||
3528 | } | |||
3529 | ||||
3530 | ArgListTy Args; | |||
3531 | Args.reserve(II->getNumArgOperands()); | |||
3532 | ||||
3533 | // Populate the argument list. | |||
3534 | for (auto &Arg : II->arg_operands()) { | |||
3535 | ArgListEntry Entry; | |||
3536 | Entry.Val = Arg; | |||
3537 | Entry.Ty = Arg->getType(); | |||
3538 | Args.push_back(Entry); | |||
3539 | } | |||
3540 | ||||
3541 | CallLoweringInfo CLI; | |||
3542 | MCContext &Ctx = MF->getContext(); | |||
3543 | CLI.setCallee(DL, Ctx, TLI.getLibcallCallingConv(LC), II->getType(), | |||
3544 | TLI.getLibcallName(LC), std::move(Args)); | |||
3545 | if (!lowerCallTo(CLI)) | |||
3546 | return false; | |||
3547 | updateValueMap(II, CLI.ResultReg); | |||
3548 | return true; | |||
3549 | } | |||
3550 | case Intrinsic::fabs: { | |||
3551 | MVT VT; | |||
3552 | if (!isTypeLegal(II->getType(), VT)) | |||
3553 | return false; | |||
3554 | ||||
3555 | unsigned Opc; | |||
3556 | switch (VT.SimpleTy) { | |||
3557 | default: | |||
3558 | return false; | |||
3559 | case MVT::f32: | |||
3560 | Opc = AArch64::FABSSr; | |||
3561 | break; | |||
3562 | case MVT::f64: | |||
3563 | Opc = AArch64::FABSDr; | |||
3564 | break; | |||
3565 | } | |||
3566 | unsigned SrcReg = getRegForValue(II->getOperand(0)); | |||
3567 | if (!SrcReg) | |||
3568 | return false; | |||
3569 | bool SrcRegIsKill = hasTrivialKill(II->getOperand(0)); | |||
3570 | unsigned ResultReg = createResultReg(TLI.getRegClassFor(VT)); | |||
3571 | BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(Opc), ResultReg) | |||
3572 | .addReg(SrcReg, getKillRegState(SrcRegIsKill)); | |||
3573 | updateValueMap(II, ResultReg); | |||
3574 | return true; | |||
3575 | } | |||
3576 | case Intrinsic::trap: | |||
3577 | BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(AArch64::BRK)) | |||
3578 | .addImm(1); | |||
3579 | return true; | |||
3580 | ||||
3581 | case Intrinsic::sqrt: { | |||
3582 | Type *RetTy = II->getCalledFunction()->getReturnType(); | |||
3583 | ||||
3584 | MVT VT; | |||
3585 | if (!isTypeLegal(RetTy, VT)) | |||
3586 | return false; | |||
3587 | ||||
3588 | unsigned Op0Reg = getRegForValue(II->getOperand(0)); | |||
3589 | if (!Op0Reg) | |||
3590 | return false; | |||
3591 | bool Op0IsKill = hasTrivialKill(II->getOperand(0)); | |||
3592 | ||||
3593 | unsigned ResultReg = fastEmit_r(VT, VT, ISD::FSQRT, Op0Reg, Op0IsKill); | |||
3594 | if (!ResultReg) | |||
3595 | return false; | |||
3596 | ||||
3597 | updateValueMap(II, ResultReg); | |||
3598 | return true; | |||
3599 | } | |||
3600 | case Intrinsic::sadd_with_overflow: | |||
3601 | case Intrinsic::uadd_with_overflow: | |||
3602 | case Intrinsic::ssub_with_overflow: | |||
3603 | case Intrinsic::usub_with_overflow: | |||
3604 | case Intrinsic::smul_with_overflow: | |||
3605 | case Intrinsic::umul_with_overflow: { | |||
3606 | // This implements the basic lowering of the xalu with overflow intrinsics. | |||
3607 | const Function *Callee = II->getCalledFunction(); | |||
3608 | auto *Ty = cast<StructType>(Callee->getReturnType()); | |||
3609 | Type *RetTy = Ty->getTypeAtIndex(0U); | |||
3610 | ||||
3611 | MVT VT; | |||
3612 | if (!isTypeLegal(RetTy, VT)) | |||
3613 | return false; | |||
3614 | ||||
3615 | if (VT != MVT::i32 && VT != MVT::i64) | |||
3616 | return false; | |||
3617 | ||||
3618 | const Value *LHS = II->getArgOperand(0); | |||
3619 | const Value *RHS = II->getArgOperand(1); | |||
3620 | // Canonicalize immediate to the RHS. | |||
3621 | if (isa<ConstantInt>(LHS) && !isa<ConstantInt>(RHS) && | |||
3622 | isCommutativeIntrinsic(II)) | |||
3623 | std::swap(LHS, RHS); | |||
3624 | ||||
3625 | // Simplify multiplies. | |||
3626 | Intrinsic::ID IID = II->getIntrinsicID(); | |||
3627 | switch (IID) { | |||
3628 | default: | |||
3629 | break; | |||
3630 | case Intrinsic::smul_with_overflow: | |||
3631 | if (const auto *C = dyn_cast<ConstantInt>(RHS)) | |||
3632 | if (C->getValue() == 2) { | |||
3633 | IID = Intrinsic::sadd_with_overflow; | |||
3634 | RHS = LHS; | |||
3635 | } | |||
3636 | break; | |||
3637 | case Intrinsic::umul_with_overflow: | |||
3638 | if (const auto *C = dyn_cast<ConstantInt>(RHS)) | |||
3639 | if (C->getValue() == 2) { | |||
3640 | IID = Intrinsic::uadd_with_overflow; | |||
3641 | RHS = LHS; | |||
3642 | } | |||
3643 | break; | |||
3644 | } | |||
3645 | ||||
3646 | unsigned ResultReg1 = 0, ResultReg2 = 0, MulReg = 0; | |||
3647 | AArch64CC::CondCode CC = AArch64CC::Invalid; | |||
3648 | switch (IID) { | |||
3649 | default: llvm_unreachable("Unexpected intrinsic!")::llvm::llvm_unreachable_internal("Unexpected intrinsic!", "/build/llvm-toolchain-snapshot-7~svn326246/lib/Target/AArch64/AArch64FastISel.cpp" , 3649); | |||
3650 | case Intrinsic::sadd_with_overflow: | |||
3651 | ResultReg1 = emitAdd(VT, LHS, RHS, /*SetFlags=*/true); | |||
3652 | CC = AArch64CC::VS; | |||
3653 | break; | |||
3654 | case Intrinsic::uadd_with_overflow: | |||
3655 | ResultReg1 = emitAdd(VT, LHS, RHS, /*SetFlags=*/true); | |||
3656 | CC = AArch64CC::HS; | |||
3657 | break; | |||
3658 | case Intrinsic::ssub_with_overflow: | |||
3659 | ResultReg1 = emitSub(VT, LHS, RHS, /*SetFlags=*/true); | |||
3660 | CC = AArch64CC::VS; | |||
3661 | break; | |||
3662 | case Intrinsic::usub_with_overflow: | |||
3663 | ResultReg1 = emitSub(VT, LHS, RHS, /*SetFlags=*/true); | |||
3664 | CC = AArch64CC::LO; | |||
3665 | break; | |||
3666 | case Intrinsic::smul_with_overflow: { | |||
3667 | CC = AArch64CC::NE; | |||
3668 | unsigned LHSReg = getRegForValue(LHS); | |||
3669 | if (!LHSReg) | |||
3670 | return false; | |||
3671 | bool LHSIsKill = hasTrivialKill(LHS); | |||
3672 | ||||
3673 | unsigned RHSReg = getRegForValue(RHS); | |||
3674 | if (!RHSReg) | |||
3675 | return false; | |||
3676 | bool RHSIsKill = hasTrivialKill(RHS); | |||
3677 | ||||
3678 | if (VT == MVT::i32) { | |||
3679 | MulReg = emitSMULL_rr(MVT::i64, LHSReg, LHSIsKill, RHSReg, RHSIsKill); | |||
3680 | unsigned ShiftReg = emitLSR_ri(MVT::i64, MVT::i64, MulReg, | |||
3681 | /*IsKill=*/false, 32); | |||
3682 | MulReg = fastEmitInst_extractsubreg(VT, MulReg, /*IsKill=*/true, | |||
3683 | AArch64::sub_32); | |||
3684 | ShiftReg = fastEmitInst_extractsubreg(VT, ShiftReg, /*IsKill=*/true, | |||
3685 | AArch64::sub_32); | |||
3686 | emitSubs_rs(VT, ShiftReg, /*IsKill=*/true, MulReg, /*IsKill=*/false, | |||
3687 | AArch64_AM::ASR, 31, /*WantResult=*/false); | |||
3688 | } else { | |||
3689 | assert(VT == MVT::i64 && "Unexpected value type.")(static_cast <bool> (VT == MVT::i64 && "Unexpected value type." ) ? void (0) : __assert_fail ("VT == MVT::i64 && \"Unexpected value type.\"" , "/build/llvm-toolchain-snapshot-7~svn326246/lib/Target/AArch64/AArch64FastISel.cpp" , 3689, __extension__ __PRETTY_FUNCTION__)); | |||
3690 | // LHSReg and RHSReg cannot be killed by this Mul, since they are | |||
3691 | // reused in the next instruction. | |||
3692 | MulReg = emitMul_rr(VT, LHSReg, /*IsKill=*/false, RHSReg, | |||
3693 | /*IsKill=*/false); | |||
3694 | unsigned SMULHReg = fastEmit_rr(VT, VT, ISD::MULHS, LHSReg, LHSIsKill, | |||
3695 | RHSReg, RHSIsKill); | |||
3696 | emitSubs_rs(VT, SMULHReg, /*IsKill=*/true, MulReg, /*IsKill=*/false, | |||
3697 | AArch64_AM::ASR, 63, /*WantResult=*/false); | |||
3698 | } | |||
3699 | break; | |||
3700 | } | |||
3701 | case Intrinsic::umul_with_overflow: { | |||
3702 | CC = AArch64CC::NE; | |||
3703 | unsigned LHSReg = getRegForValue(LHS); | |||
3704 | if (!LHSReg) | |||
3705 | return false; | |||
3706 | bool LHSIsKill = hasTrivialKill(LHS); | |||
3707 | ||||
3708 | unsigned RHSReg = getRegForValue(RHS); | |||
3709 | if (!RHSReg) | |||
3710 | return false; | |||
3711 | bool RHSIsKill = hasTrivialKill(RHS); | |||
3712 | ||||
3713 | if (VT == MVT::i32) { | |||
3714 | MulReg = emitUMULL_rr(MVT::i64, LHSReg, LHSIsKill, RHSReg, RHSIsKill); | |||
3715 | emitSubs_rs(MVT::i64, AArch64::XZR, /*IsKill=*/true, MulReg, | |||
3716 | /*IsKill=*/false, AArch64_AM::LSR, 32, | |||
3717 | /*WantResult=*/false); | |||
3718 | MulReg = fastEmitInst_extractsubreg(VT, MulReg, /*IsKill=*/true, | |||
3719 | AArch64::sub_32); | |||
3720 | } else { | |||
3721 | assert(VT == MVT::i64 && "Unexpected value type.")(static_cast <bool> (VT == MVT::i64 && "Unexpected value type." ) ? void (0) : __assert_fail ("VT == MVT::i64 && \"Unexpected value type.\"" , "/build/llvm-toolchain-snapshot-7~svn326246/lib/Target/AArch64/AArch64FastISel.cpp" , 3721, __extension__ __PRETTY_FUNCTION__)); | |||
3722 | // LHSReg and RHSReg cannot be killed by this Mul, since they are | |||
3723 | // reused in the next instruction. | |||
3724 | MulReg = emitMul_rr(VT, LHSReg, /*IsKill=*/false, RHSReg, | |||
3725 | /*IsKill=*/false); | |||
3726 | unsigned UMULHReg = fastEmit_rr(VT, VT, ISD::MULHU, LHSReg, LHSIsKill, | |||
3727 | RHSReg, RHSIsKill); | |||
3728 | emitSubs_rr(VT, AArch64::XZR, /*IsKill=*/true, UMULHReg, | |||
3729 | /*IsKill=*/false, /*WantResult=*/false); | |||
3730 | } | |||
3731 | break; | |||
3732 | } | |||
3733 | } | |||
3734 | ||||
3735 | if (MulReg) { | |||
3736 | ResultReg1 = createResultReg(TLI.getRegClassFor(VT)); | |||
3737 | BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, | |||
3738 | TII.get(TargetOpcode::COPY), ResultReg1).addReg(MulReg); | |||
3739 | } | |||
3740 | ||||
3741 | ResultReg2 = fastEmitInst_rri(AArch64::CSINCWr, &AArch64::GPR32RegClass, | |||
3742 | AArch64::WZR, /*IsKill=*/true, AArch64::WZR, | |||
3743 | /*IsKill=*/true, getInvertedCondCode(CC)); | |||
3744 | (void)ResultReg2; | |||
3745 | assert((ResultReg1 + 1) == ResultReg2 &&(static_cast <bool> ((ResultReg1 + 1) == ResultReg2 && "Nonconsecutive result registers.") ? void (0) : __assert_fail ("(ResultReg1 + 1) == ResultReg2 && \"Nonconsecutive result registers.\"" , "/build/llvm-toolchain-snapshot-7~svn326246/lib/Target/AArch64/AArch64FastISel.cpp" , 3746, __extension__ __PRETTY_FUNCTION__)) | |||
3746 | "Nonconsecutive result registers.")(static_cast <bool> ((ResultReg1 + 1) == ResultReg2 && "Nonconsecutive result registers.") ? void (0) : __assert_fail ("(ResultReg1 + 1) == ResultReg2 && \"Nonconsecutive result registers.\"" , "/build/llvm-toolchain-snapshot-7~svn326246/lib/Target/AArch64/AArch64FastISel.cpp" , 3746, __extension__ __PRETTY_FUNCTION__)); | |||
3747 | updateValueMap(II, ResultReg1, 2); | |||
3748 | return true; | |||
3749 | } | |||
3750 | } | |||
3751 | return false; | |||
3752 | } | |||
3753 | ||||
3754 | bool AArch64FastISel::selectRet(const Instruction *I) { | |||
3755 | const ReturnInst *Ret = cast<ReturnInst>(I); | |||
3756 | const Function &F = *I->getParent()->getParent(); | |||
3757 | ||||
3758 | if (!FuncInfo.CanLowerReturn) | |||
3759 | return false; | |||
3760 | ||||
3761 | if (F.isVarArg()) | |||
3762 | return false; | |||
3763 | ||||
3764 | if (TLI.supportSwiftError() && | |||
3765 | F.getAttributes().hasAttrSomewhere(Attribute::SwiftError)) | |||
3766 | return false; | |||
3767 | ||||
3768 | if (TLI.supportSplitCSR(FuncInfo.MF)) | |||
3769 | return false; | |||
3770 | ||||
3771 | // Build a list of return value registers. | |||
3772 | SmallVector<unsigned, 4> RetRegs; | |||
3773 | ||||
3774 | if (Ret->getNumOperands() > 0) { | |||
3775 | CallingConv::ID CC = F.getCallingConv(); | |||
3776 | SmallVector<ISD::OutputArg, 4> Outs; | |||
3777 | GetReturnInfo(F.getReturnType(), F.getAttributes(), Outs, TLI, DL); | |||
3778 | ||||
3779 | // Analyze operands of the call, assigning locations to each operand. | |||
3780 | SmallVector<CCValAssign, 16> ValLocs; | |||
3781 | CCState CCInfo(CC, F.isVarArg(), *FuncInfo.MF, ValLocs, I->getContext()); | |||
3782 | CCAssignFn *RetCC = CC == CallingConv::WebKit_JS ? RetCC_AArch64_WebKit_JS | |||
3783 | : RetCC_AArch64_AAPCS; | |||
3784 | CCInfo.AnalyzeReturn(Outs, RetCC); | |||
3785 | ||||
3786 | // Only handle a single return value for now. | |||
3787 | if (ValLocs.size() != 1) | |||
3788 | return false; | |||
3789 | ||||
3790 | CCValAssign &VA = ValLocs[0]; | |||
3791 | const Value *RV = Ret->getOperand(0); | |||
3792 | ||||
3793 | // Don't bother handling odd stuff for now. | |||
3794 | if ((VA.getLocInfo() != CCValAssign::Full) && | |||
3795 | (VA.getLocInfo() != CCValAssign::BCvt)) | |||
3796 | return false; | |||
3797 | ||||
3798 | // Only handle register returns for now. | |||
3799 | if (!VA.isRegLoc()) | |||
3800 | return false; | |||
3801 | ||||
3802 | unsigned Reg = getRegForValue(RV); | |||
3803 | if (Reg == 0) | |||
3804 | return false; | |||
3805 | ||||
3806 | unsigned SrcReg = Reg + VA.getValNo(); | |||
3807 | unsigned DestReg = VA.getLocReg(); | |||
3808 | // Avoid a cross-class copy. This is very unlikely. | |||
3809 | if (!MRI.getRegClass(SrcReg)->contains(DestReg)) | |||
3810 | return false; | |||
3811 | ||||
3812 | EVT RVEVT = TLI.getValueType(DL, RV->getType()); | |||
3813 | if (!RVEVT.isSimple()) | |||
3814 | return false; | |||
3815 | ||||
3816 | // Vectors (of > 1 lane) in big endian need tricky handling. | |||
3817 | if (RVEVT.isVector() && RVEVT.getVectorNumElements() > 1 && | |||
3818 | !Subtarget->isLittleEndian()) | |||
3819 | return false; | |||
3820 | ||||
3821 | MVT RVVT = RVEVT.getSimpleVT(); | |||
3822 | if (RVVT == MVT::f128) | |||
3823 | return false; | |||
3824 | ||||
3825 | MVT DestVT = VA.getValVT(); | |||
3826 | // Special handling for extended integers. | |||
3827 | if (RVVT != DestVT) { | |||
3828 | if (RVVT != MVT::i1 && RVVT != MVT::i8 && RVVT != MVT::i16) | |||
3829 | return false; | |||
3830 | ||||
3831 | if (!Outs[0].Flags.isZExt() && !Outs[0].Flags.isSExt()) | |||
3832 | return false; | |||
3833 | ||||
3834 | bool IsZExt = Outs[0].Flags.isZExt(); | |||
3835 | SrcReg = emitIntExt(RVVT, SrcReg, DestVT, IsZExt); | |||
3836 | if (SrcReg == 0) | |||
3837 | return false; | |||
3838 | } | |||
3839 | ||||
3840 | // Make the copy. | |||
3841 | BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, | |||
3842 | TII.get(TargetOpcode::COPY), DestReg).addReg(SrcReg); | |||
3843 | ||||
3844 | // Add register to return instruction. | |||
3845 | RetRegs.push_back(VA.getLocReg()); | |||
3846 | } | |||
3847 | ||||
3848 | MachineInstrBuilder MIB = BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, | |||
3849 | TII.get(AArch64::RET_ReallyLR)); | |||
3850 | for (unsigned RetReg : RetRegs) | |||
3851 | MIB.addReg(RetReg, RegState::Implicit); | |||
3852 | return true; | |||
3853 | } | |||
3854 | ||||
3855 | bool AArch64FastISel::selectTrunc(const Instruction *I) { | |||
3856 | Type *DestTy = I->getType(); | |||
3857 | Value *Op = I->getOperand(0); | |||
3858 | Type *SrcTy = Op->getType(); | |||
3859 | ||||
3860 | EVT SrcEVT = TLI.getValueType(DL, SrcTy, true); | |||
3861 | EVT DestEVT = TLI.getValueType(DL, DestTy, true); | |||
3862 | if (!SrcEVT.isSimple()) | |||
3863 | return false; | |||
3864 | if (!DestEVT.isSimple()) | |||
3865 | return false; | |||
3866 | ||||
3867 | MVT SrcVT = SrcEVT.getSimpleVT(); | |||
3868 | MVT DestVT = DestEVT.getSimpleVT(); | |||
3869 | ||||
3870 | if (SrcVT != MVT::i64 && SrcVT != MVT::i32 && SrcVT != MVT::i16 && | |||
3871 | SrcVT != MVT::i8) | |||
3872 | return false; | |||
3873 | if (DestVT != MVT::i32 && DestVT != MVT::i16 && DestVT != MVT::i8 && | |||
3874 | DestVT != MVT::i1) | |||
3875 | return false; | |||
3876 | ||||
3877 | unsigned SrcReg = getRegForValue(Op); | |||
3878 | if (!SrcReg) | |||
3879 | return false; | |||
3880 | bool SrcIsKill = hasTrivialKill(Op); | |||
3881 | ||||
3882 | // If we're truncating from i64 to a smaller non-legal type then generate an | |||
3883 | // AND. Otherwise, we know the high bits are undefined and a truncate only | |||
3884 | // generate a COPY. We cannot mark the source register also as result | |||
3885 | // register, because this can incorrectly transfer the kill flag onto the | |||
3886 | // source register. | |||
3887 | unsigned ResultReg; | |||
3888 | if (SrcVT == MVT::i64) { | |||
3889 | uint64_t Mask = 0; | |||
3890 | switch (DestVT.SimpleTy) { | |||
3891 | default: | |||
3892 | // Trunc i64 to i32 is handled by the target-independent fast-isel. | |||
3893 | return false; | |||
3894 | case MVT::i1: | |||
3895 | Mask = 0x1; | |||
3896 | break; | |||
3897 | case MVT::i8: | |||
3898 | Mask = 0xff; | |||
3899 | break; | |||
3900 | case MVT::i16: | |||
3901 | Mask = 0xffff; | |||
3902 | break; | |||
3903 | } | |||
3904 | // Issue an extract_subreg to get the lower 32-bits. | |||
3905 | unsigned Reg32 = fastEmitInst_extractsubreg(MVT::i32, SrcReg, SrcIsKill, | |||
3906 | AArch64::sub_32); | |||
3907 | // Create the AND instruction which performs the actual truncation. | |||
3908 | ResultReg = emitAnd_ri(MVT::i32, Reg32, /*IsKill=*/true, Mask); | |||
3909 | assert(ResultReg && "Unexpected AND instruction emission failure.")(static_cast <bool> (ResultReg && "Unexpected AND instruction emission failure." ) ? void (0) : __assert_fail ("ResultReg && \"Unexpected AND instruction emission failure.\"" , "/build/llvm-toolchain-snapshot-7~svn326246/lib/Target/AArch64/AArch64FastISel.cpp" , 3909, __extension__ __PRETTY_FUNCTION__)); | |||
3910 | } else { | |||
3911 | ResultReg = createResultReg(&AArch64::GPR32RegClass); | |||
3912 | BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, | |||
3913 | TII.get(TargetOpcode::COPY), ResultReg) | |||
3914 | .addReg(SrcReg, getKillRegState(SrcIsKill)); | |||
3915 | } | |||
3916 | ||||
3917 | updateValueMap(I, ResultReg); | |||
3918 | return true; | |||
3919 | } | |||
3920 | ||||
3921 | unsigned AArch64FastISel::emiti1Ext(unsigned SrcReg, MVT DestVT, bool IsZExt) { | |||
3922 | assert((DestVT == MVT::i8 || DestVT == MVT::i16 || DestVT == MVT::i32 ||(static_cast <bool> ((DestVT == MVT::i8 || DestVT == MVT ::i16 || DestVT == MVT::i32 || DestVT == MVT::i64) && "Unexpected value type.") ? void (0) : __assert_fail ("(DestVT == MVT::i8 || DestVT == MVT::i16 || DestVT == MVT::i32 || DestVT == MVT::i64) && \"Unexpected value type.\"" , "/build/llvm-toolchain-snapshot-7~svn326246/lib/Target/AArch64/AArch64FastISel.cpp" , 3924, __extension__ __PRETTY_FUNCTION__)) | |||
3923 | DestVT == MVT::i64) &&(static_cast <bool> ((DestVT == MVT::i8 || DestVT == MVT ::i16 || DestVT == MVT::i32 || DestVT == MVT::i64) && "Unexpected value type.") ? void (0) : __assert_fail ("(DestVT == MVT::i8 || DestVT == MVT::i16 || DestVT == MVT::i32 || DestVT == MVT::i64) && \"Unexpected value type.\"" , "/build/llvm-toolchain-snapshot-7~svn326246/lib/Target/AArch64/AArch64FastISel.cpp" , 3924, __extension__ __PRETTY_FUNCTION__)) | |||
3924 | "Unexpected value type.")(static_cast <bool> ((DestVT == MVT::i8 || DestVT == MVT ::i16 || DestVT == MVT::i32 || DestVT == MVT::i64) && "Unexpected value type.") ? void (0) : __assert_fail ("(DestVT == MVT::i8 || DestVT == MVT::i16 || DestVT == MVT::i32 || DestVT == MVT::i64) && \"Unexpected value type.\"" , "/build/llvm-toolchain-snapshot-7~svn326246/lib/Target/AArch64/AArch64FastISel.cpp" , 3924, __extension__ __PRETTY_FUNCTION__)); | |||
3925 | // Handle i8 and i16 as i32. | |||
3926 | if (DestVT == MVT::i8 || DestVT == MVT::i16) | |||
3927 | DestVT = MVT::i32; | |||
3928 | ||||
3929 | if (IsZExt) { | |||
3930 | unsigned ResultReg = emitAnd_ri(MVT::i32, SrcReg, /*TODO:IsKill=*/false, 1); | |||
3931 | assert(ResultReg && "Unexpected AND instruction emission failure.")(static_cast <bool> (ResultReg && "Unexpected AND instruction emission failure." ) ? void (0) : __assert_fail ("ResultReg && \"Unexpected AND instruction emission failure.\"" , "/build/llvm-toolchain-snapshot-7~svn326246/lib/Target/AArch64/AArch64FastISel.cpp" , 3931, __extension__ __PRETTY_FUNCTION__)); | |||
3932 | if (DestVT == MVT::i64) { | |||
3933 | // We're ZExt i1 to i64. The ANDWri Wd, Ws, #1 implicitly clears the | |||
3934 | // upper 32 bits. Emit a SUBREG_TO_REG to extend from Wd to Xd. | |||
3935 | unsigned Reg64 = MRI.createVirtualRegister(&AArch64::GPR64RegClass); | |||
3936 | BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, | |||
3937 | TII.get(AArch64::SUBREG_TO_REG), Reg64) | |||
3938 | .addImm(0) | |||
3939 | .addReg(ResultReg) | |||
3940 | .addImm(AArch64::sub_32); | |||
3941 | ResultReg = Reg64; | |||
3942 | } | |||
3943 | return ResultReg; | |||
3944 | } else { | |||
3945 | if (DestVT == MVT::i64) { | |||
3946 | // FIXME: We're SExt i1 to i64. | |||
3947 | return 0; | |||
3948 | } | |||
3949 | return fastEmitInst_rii(AArch64::SBFMWri, &AArch64::GPR32RegClass, SrcReg, | |||
3950 | /*TODO:IsKill=*/false, 0, 0); | |||
3951 | } | |||
3952 | } | |||
3953 | ||||
3954 | unsigned AArch64FastISel::emitMul_rr(MVT RetVT, unsigned Op0, bool Op0IsKill, | |||
3955 | unsigned Op1, bool Op1IsKill) { | |||
3956 | unsigned Opc, ZReg; | |||
3957 | switch (RetVT.SimpleTy) { | |||
3958 | default: return 0; | |||
3959 | case MVT::i8: | |||
3960 | case MVT::i16: | |||
3961 | case MVT::i32: | |||
3962 | RetVT = MVT::i32; | |||
3963 | Opc = AArch64::MADDWrrr; ZReg = AArch64::WZR; break; | |||
3964 | case MVT::i64: | |||
3965 | Opc = AArch64::MADDXrrr; ZReg = AArch64::XZR; break; | |||
3966 | } | |||
3967 | ||||
3968 | const TargetRegisterClass *RC = | |||
3969 | (RetVT == MVT::i64) ? &AArch64::GPR64RegClass : &AArch64::GPR32RegClass; | |||
3970 | return fastEmitInst_rrr(Opc, RC, Op0, Op0IsKill, Op1, Op1IsKill, | |||
3971 | /*IsKill=*/ZReg, true); | |||
3972 | } | |||
3973 | ||||
3974 | unsigned AArch64FastISel::emitSMULL_rr(MVT RetVT, unsigned Op0, bool Op0IsKill, | |||
3975 | unsigned Op1, bool Op1IsKill) { | |||
3976 | if (RetVT != MVT::i64) | |||
3977 | return 0; | |||
3978 | ||||
3979 | return fastEmitInst_rrr(AArch64::SMADDLrrr, &AArch64::GPR64RegClass, | |||
3980 | Op0, Op0IsKill, Op1, Op1IsKill, | |||
3981 | AArch64::XZR, /*IsKill=*/true); | |||
3982 | } | |||
3983 | ||||
3984 | unsigned AArch64FastISel::emitUMULL_rr(MVT RetVT, unsigned Op0, bool Op0IsKill, | |||
3985 | unsigned Op1, bool Op1IsKill) { | |||
3986 | if (RetVT != MVT::i64) | |||
3987 | return 0; | |||
3988 | ||||
3989 | return fastEmitInst_rrr(AArch64::UMADDLrrr, &AArch64::GPR64RegClass, | |||
3990 | Op0, Op0IsKill, Op1, Op1IsKill, | |||
3991 | AArch64::XZR, /*IsKill=*/true); | |||
3992 | } | |||
3993 | ||||
3994 | unsigned AArch64FastISel::emitLSL_rr(MVT RetVT, unsigned Op0Reg, bool Op0IsKill, | |||
3995 | unsigned Op1Reg, bool Op1IsKill) { | |||
3996 | unsigned Opc = 0; | |||
3997 | bool NeedTrunc = false; | |||
3998 | uint64_t Mask = 0; | |||
3999 | switch (RetVT.SimpleTy) { | |||
4000 | default: return 0; | |||
4001 | case MVT::i8: Opc = AArch64::LSLVWr; NeedTrunc = true; Mask = 0xff; break; | |||
4002 | case MVT::i16: Opc = AArch64::LSLVWr; NeedTrunc = true; Mask = 0xffff; break; | |||
4003 | case MVT::i32: Opc = AArch64::LSLVWr; break; | |||
4004 | case MVT::i64: Opc = AArch64::LSLVXr; break; | |||
4005 | } | |||
4006 | ||||
4007 | const TargetRegisterClass *RC = | |||
4008 | (RetVT == MVT::i64) ? &AArch64::GPR64RegClass : &AArch64::GPR32RegClass; | |||
4009 | if (NeedTrunc) { | |||
4010 | Op1Reg = emitAnd_ri(MVT::i32, Op1Reg, Op1IsKill, Mask); | |||
4011 | Op1IsKill = true; | |||
4012 | } | |||
4013 | unsigned ResultReg = fastEmitInst_rr(Opc, RC, Op0Reg, Op0IsKill, Op1Reg, | |||
4014 | Op1IsKill); | |||
4015 | if (NeedTrunc) | |||
4016 | ResultReg = emitAnd_ri(MVT::i32, ResultReg, /*IsKill=*/true, Mask); | |||
4017 | return ResultReg; | |||
4018 | } | |||
4019 | ||||
4020 | unsigned AArch64FastISel::emitLSL_ri(MVT RetVT, MVT SrcVT, unsigned Op0, | |||
4021 | bool Op0IsKill, uint64_t Shift, | |||
4022 | bool IsZExt) { | |||
4023 | assert(RetVT.SimpleTy >= SrcVT.SimpleTy &&(static_cast <bool> (RetVT.SimpleTy >= SrcVT.SimpleTy && "Unexpected source/return type pair.") ? void (0) : __assert_fail ("RetVT.SimpleTy >= SrcVT.SimpleTy && \"Unexpected source/return type pair.\"" , "/build/llvm-toolchain-snapshot-7~svn326246/lib/Target/AArch64/AArch64FastISel.cpp" , 4024, __extension__ __PRETTY_FUNCTION__)) | |||
4024 | "Unexpected source/return type pair.")(static_cast <bool> (RetVT.SimpleTy >= SrcVT.SimpleTy && "Unexpected source/return type pair.") ? void (0) : __assert_fail ("RetVT.SimpleTy >= SrcVT.SimpleTy && \"Unexpected source/return type pair.\"" , "/build/llvm-toolchain-snapshot-7~svn326246/lib/Target/AArch64/AArch64FastISel.cpp" , 4024, __extension__ __PRETTY_FUNCTION__)); | |||
4025 | assert((SrcVT == MVT::i1 || SrcVT == MVT::i8 || SrcVT == MVT::i16 ||(static_cast <bool> ((SrcVT == MVT::i1 || SrcVT == MVT:: i8 || SrcVT == MVT::i16 || SrcVT == MVT::i32 || SrcVT == MVT:: i64) && "Unexpected source value type.") ? void (0) : __assert_fail ("(SrcVT == MVT::i1 || SrcVT == MVT::i8 || SrcVT == MVT::i16 || SrcVT == MVT::i32 || SrcVT == MVT::i64) && \"Unexpected source value type.\"" , "/build/llvm-toolchain-snapshot-7~svn326246/lib/Target/AArch64/AArch64FastISel.cpp" , 4027, __extension__ __PRETTY_FUNCTION__)) | |||
4026 | SrcVT == MVT::i32 || SrcVT == MVT::i64) &&(static_cast <bool> ((SrcVT == MVT::i1 || SrcVT == MVT:: i8 || SrcVT == MVT::i16 || SrcVT == MVT::i32 || SrcVT == MVT:: i64) && "Unexpected source value type.") ? void (0) : __assert_fail ("(SrcVT == MVT::i1 || SrcVT == MVT::i8 || SrcVT == MVT::i16 || SrcVT == MVT::i32 || SrcVT == MVT::i64) && \"Unexpected source value type.\"" , "/build/llvm-toolchain-snapshot-7~svn326246/lib/Target/AArch64/AArch64FastISel.cpp" , 4027, __extension__ __PRETTY_FUNCTION__)) | |||
4027 | "Unexpected source value type.")(static_cast <bool> ((SrcVT == MVT::i1 || SrcVT == MVT:: i8 || SrcVT == MVT::i16 || SrcVT == MVT::i32 || SrcVT == MVT:: i64) && "Unexpected source value type.") ? void (0) : __assert_fail ("(SrcVT == MVT::i1 || SrcVT == MVT::i8 || SrcVT == MVT::i16 || SrcVT == MVT::i32 || SrcVT == MVT::i64) && \"Unexpected source value type.\"" , "/build/llvm-toolchain-snapshot-7~svn326246/lib/Target/AArch64/AArch64FastISel.cpp" , 4027, __extension__ __PRETTY_FUNCTION__)); | |||
4028 | assert((RetVT == MVT::i8 || RetVT == MVT::i16 || RetVT == MVT::i32 ||(static_cast <bool> ((RetVT == MVT::i8 || RetVT == MVT:: i16 || RetVT == MVT::i32 || RetVT == MVT::i64) && "Unexpected return value type." ) ? void (0) : __assert_fail ("(RetVT == MVT::i8 || RetVT == MVT::i16 || RetVT == MVT::i32 || RetVT == MVT::i64) && \"Unexpected return value type.\"" , "/build/llvm-toolchain-snapshot-7~svn326246/lib/Target/AArch64/AArch64FastISel.cpp" , 4029, __extension__ __PRETTY_FUNCTION__)) | |||
4029 | RetVT == MVT::i64) && "Unexpected return value type.")(static_cast <bool> ((RetVT == MVT::i8 || RetVT == MVT:: i16 || RetVT == MVT::i32 || RetVT == MVT::i64) && "Unexpected return value type." ) ? void (0) : __assert_fail ("(RetVT == MVT::i8 || RetVT == MVT::i16 || RetVT == MVT::i32 || RetVT == MVT::i64) && \"Unexpected return value type.\"" , "/build/llvm-toolchain-snapshot-7~svn326246/lib/Target/AArch64/AArch64FastISel.cpp" , 4029, __extension__ __PRETTY_FUNCTION__)); | |||
4030 | ||||
4031 | bool Is64Bit = (RetVT == MVT::i64); | |||
4032 | unsigned RegSize = Is64Bit ? 64 : 32; | |||
4033 | unsigned DstBits = RetVT.getSizeInBits(); | |||
4034 | unsigned SrcBits = SrcVT.getSizeInBits(); | |||
4035 | const TargetRegisterClass *RC = | |||
4036 | Is64Bit ? &AArch64::GPR64RegClass : &AArch64::GPR32RegClass; | |||
4037 | ||||
4038 | // Just emit a copy for "zero" shifts. | |||
4039 | if (Shift == 0) { | |||
4040 | if (RetVT == SrcVT) { | |||
4041 | unsigned ResultReg = createResultReg(RC); | |||
4042 | BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, | |||
4043 | TII.get(TargetOpcode::COPY), ResultReg) | |||
4044 | .addReg(Op0, getKillRegState(Op0IsKill)); | |||
4045 | return ResultReg; | |||
4046 | } else | |||
4047 | return emitIntExt(SrcVT, Op0, RetVT, IsZExt); | |||
4048 | } | |||
4049 | ||||
4050 | // Don't deal with undefined shifts. | |||
4051 | if (Shift >= DstBits) | |||
4052 | return 0; | |||
4053 | ||||
4054 | // For immediate shifts we can fold the zero-/sign-extension into the shift. | |||
4055 | // {S|U}BFM Wd, Wn, #r, #s | |||
4056 | // Wd<32+s-r,32-r> = Wn<s:0> when r > s | |||
4057 | ||||
4058 | // %1 = {s|z}ext i8 {0b1010_1010|0b0101_0101} to i16 | |||
4059 | // %2 = shl i16 %1, 4 | |||
4060 | // Wd<32+7-28,32-28> = Wn<7:0> <- clamp s to 7 | |||
4061 | // 0b1111_1111_1111_1111__1111_1010_1010_0000 sext | |||
4062 | // 0b0000_0000_0000_0000__0000_0101_0101_0000 sext | zext | |||
4063 | // 0b0000_0000_0000_0000__0000_1010_1010_0000 zext | |||
4064 | ||||
4065 | // %1 = {s|z}ext i8 {0b1010_1010|0b0101_0101} to i16 | |||
4066 | // %2 = shl i16 %1, 8 | |||
4067 | // Wd<32+7-24,32-24> = Wn<7:0> | |||
4068 | // 0b1111_1111_1111_1111__1010_1010_0000_0000 sext | |||
4069 | // 0b0000_0000_0000_0000__0101_0101_0000_0000 sext | zext | |||
4070 | // 0b0000_0000_0000_0000__1010_1010_0000_0000 zext | |||
4071 | ||||
4072 | // %1 = {s|z}ext i8 {0b1010_1010|0b0101_0101} to i16 | |||
4073 | // %2 = shl i16 %1, 12 | |||
4074 | // Wd<32+3-20,32-20> = Wn<3:0> | |||
4075 | // 0b1111_1111_1111_1111__1010_0000_0000_0000 sext | |||
4076 | // 0b0000_0000_0000_0000__0101_0000_0000_0000 sext | zext | |||
4077 | // 0b0000_0000_0000_0000__1010_0000_0000_0000 zext | |||
4078 | ||||
4079 | unsigned ImmR = RegSize - Shift; | |||
4080 | // Limit the width to the length of the source type. | |||
4081 | unsigned ImmS = std::min<unsigned>(SrcBits - 1, DstBits - 1 - Shift); | |||
4082 | static const unsigned OpcTable[2][2] = { | |||
4083 | {AArch64::SBFMWri, AArch64::SBFMXri}, | |||
4084 | {AArch64::UBFMWri, AArch64::UBFMXri} | |||
4085 | }; | |||
4086 | unsigned Opc = OpcTable[IsZExt][Is64Bit]; | |||
4087 | if (SrcVT.SimpleTy <= MVT::i32 && RetVT == MVT::i64) { | |||
4088 | unsigned TmpReg = MRI.createVirtualRegister(RC); | |||
4089 | BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, | |||
4090 | TII.get(AArch64::SUBREG_TO_REG), TmpReg) | |||
4091 | .addImm(0) | |||
4092 | .addReg(Op0, getKillRegState(Op0IsKill)) | |||
4093 | .addImm(AArch64::sub_32); | |||
4094 | Op0 = TmpReg; | |||
4095 | Op0IsKill = true; | |||
4096 | } | |||
4097 | return fastEmitInst_rii(Opc, RC, Op0, Op0IsKill, ImmR, ImmS); | |||
4098 | } | |||
4099 | ||||
4100 | unsigned AArch64FastISel::emitLSR_rr(MVT RetVT, unsigned Op0Reg, bool Op0IsKill, | |||
4101 | unsigned Op1Reg, bool Op1IsKill) { | |||
4102 | unsigned Opc = 0; | |||
4103 | bool NeedTrunc = false; | |||
4104 | uint64_t Mask = 0; | |||
4105 | switch (RetVT.SimpleTy) { | |||
4106 | default: return 0; | |||
4107 | case MVT::i8: Opc = AArch64::LSRVWr; NeedTrunc = true; Mask = 0xff; break; | |||
4108 | case MVT::i16: Opc = AArch64::LSRVWr; NeedTrunc = true; Mask = 0xffff; break; | |||
4109 | case MVT::i32: Opc = AArch64::LSRVWr; break; | |||
4110 | case MVT::i64: Opc = AArch64::LSRVXr; break; | |||
4111 | } | |||
4112 | ||||
4113 | const TargetRegisterClass *RC = | |||
4114 | (RetVT == MVT::i64) ? &AArch64::GPR64RegClass : &AArch64::GPR32RegClass; | |||
4115 | if (NeedTrunc) { | |||
4116 | Op0Reg = emitAnd_ri(MVT::i32, Op0Reg, Op0IsKill, Mask); | |||
4117 | Op1Reg = emitAnd_ri(MVT::i32, Op1Reg, Op1IsKill, Mask); | |||
4118 | Op0IsKill = Op1IsKill = true; | |||
4119 | } | |||
4120 | unsigned ResultReg = fastEmitInst_rr(Opc, RC, Op0Reg, Op0IsKill, Op1Reg, | |||
4121 | Op1IsKill); | |||
4122 | if (NeedTrunc) | |||
4123 | ResultReg = emitAnd_ri(MVT::i32, ResultReg, /*IsKill=*/true, Mask); | |||
4124 | return ResultReg; | |||
4125 | } | |||
4126 | ||||
4127 | unsigned AArch64FastISel::emitLSR_ri(MVT RetVT, MVT SrcVT, unsigned Op0, | |||
4128 | bool Op0IsKill, uint64_t Shift, | |||
4129 | bool IsZExt) { | |||
4130 | assert(RetVT.SimpleTy >= SrcVT.SimpleTy &&(static_cast <bool> (RetVT.SimpleTy >= SrcVT.SimpleTy && "Unexpected source/return type pair.") ? void (0) : __assert_fail ("RetVT.SimpleTy >= SrcVT.SimpleTy && \"Unexpected source/return type pair.\"" , "/build/llvm-toolchain-snapshot-7~svn326246/lib/Target/AArch64/AArch64FastISel.cpp" , 4131, __extension__ __PRETTY_FUNCTION__)) | |||
4131 | "Unexpected source/return type pair.")(static_cast <bool> (RetVT.SimpleTy >= SrcVT.SimpleTy && "Unexpected source/return type pair.") ? void (0) : __assert_fail ("RetVT.SimpleTy >= SrcVT.SimpleTy && \"Unexpected source/return type pair.\"" , "/build/llvm-toolchain-snapshot-7~svn326246/lib/Target/AArch64/AArch64FastISel.cpp" , 4131, __extension__ __PRETTY_FUNCTION__)); | |||
4132 | assert((SrcVT == MVT::i1 || SrcVT == MVT::i8 || SrcVT == MVT::i16 ||(static_cast <bool> ((SrcVT == MVT::i1 || SrcVT == MVT:: i8 || SrcVT == MVT::i16 || SrcVT == MVT::i32 || SrcVT == MVT:: i64) && "Unexpected source value type.") ? void (0) : __assert_fail ("(SrcVT == MVT::i1 || SrcVT == MVT::i8 || SrcVT == MVT::i16 || SrcVT == MVT::i32 || SrcVT == MVT::i64) && \"Unexpected source value type.\"" , "/build/llvm-toolchain-snapshot-7~svn326246/lib/Target/AArch64/AArch64FastISel.cpp" , 4134, __extension__ __PRETTY_FUNCTION__)) | |||
4133 | SrcVT == MVT::i32 || SrcVT == MVT::i64) &&(static_cast <bool> ((SrcVT == MVT::i1 || SrcVT == MVT:: i8 || SrcVT == MVT::i16 || SrcVT == MVT::i32 || SrcVT == MVT:: i64) && "Unexpected source value type.") ? void (0) : __assert_fail ("(SrcVT == MVT::i1 || SrcVT == MVT::i8 || SrcVT == MVT::i16 || SrcVT == MVT::i32 || SrcVT == MVT::i64) && \"Unexpected source value type.\"" , "/build/llvm-toolchain-snapshot-7~svn326246/lib/Target/AArch64/AArch64FastISel.cpp" , 4134, __extension__ __PRETTY_FUNCTION__)) | |||
4134 | "Unexpected source value type.")(static_cast <bool> ((SrcVT == MVT::i1 || SrcVT == MVT:: i8 || SrcVT == MVT::i16 || SrcVT == MVT::i32 || SrcVT == MVT:: i64) && "Unexpected source value type.") ? void (0) : __assert_fail ("(SrcVT == MVT::i1 || SrcVT == MVT::i8 || SrcVT == MVT::i16 || SrcVT == MVT::i32 || SrcVT == MVT::i64) && \"Unexpected source value type.\"" , "/build/llvm-toolchain-snapshot-7~svn326246/lib/Target/AArch64/AArch64FastISel.cpp" , 4134, __extension__ __PRETTY_FUNCTION__)); | |||
4135 | assert((RetVT == MVT::i8 || RetVT == MVT::i16 || RetVT == MVT::i32 ||(static_cast <bool> ((RetVT == MVT::i8 || RetVT == MVT:: i16 || RetVT == MVT::i32 || RetVT == MVT::i64) && "Unexpected return value type." ) ? void (0) : __assert_fail ("(RetVT == MVT::i8 || RetVT == MVT::i16 || RetVT == MVT::i32 || RetVT == MVT::i64) && \"Unexpected return value type.\"" , "/build/llvm-toolchain-snapshot-7~svn326246/lib/Target/AArch64/AArch64FastISel.cpp" , 4136, __extension__ __PRETTY_FUNCTION__)) | |||
4136 | RetVT == MVT::i64) && "Unexpected return value type.")(static_cast <bool> ((RetVT == MVT::i8 || RetVT == MVT:: i16 || RetVT == MVT::i32 || RetVT == MVT::i64) && "Unexpected return value type." ) ? void (0) : __assert_fail ("(RetVT == MVT::i8 || RetVT == MVT::i16 || RetVT == MVT::i32 || RetVT == MVT::i64) && \"Unexpected return value type.\"" , "/build/llvm-toolchain-snapshot-7~svn326246/lib/Target/AArch64/AArch64FastISel.cpp" , 4136, __extension__ __PRETTY_FUNCTION__)); | |||
4137 | ||||
4138 | bool Is64Bit = (RetVT == MVT::i64); | |||
4139 | unsigned RegSize = Is64Bit ? 64 : 32; | |||
4140 | unsigned DstBits = RetVT.getSizeInBits(); | |||
4141 | unsigned SrcBits = SrcVT.getSizeInBits(); | |||
4142 | const TargetRegisterClass *RC = | |||
4143 | Is64Bit ? &AArch64::GPR64RegClass : &AArch64::GPR32RegClass; | |||
4144 | ||||
4145 | // Just emit a copy for "zero" shifts. | |||
4146 | if (Shift == 0) { | |||
4147 | if (RetVT == SrcVT) { | |||
4148 | unsigned ResultReg = createResultReg(RC); | |||
4149 | BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, | |||
4150 | TII.get(TargetOpcode::COPY), ResultReg) | |||
4151 | .addReg(Op0, getKillRegState(Op0IsKill)); | |||
4152 | return ResultReg; | |||
4153 | } else | |||
4154 | return emitIntExt(SrcVT, Op0, RetVT, IsZExt); | |||
4155 | } | |||
4156 | ||||
4157 | // Don't deal with undefined shifts. | |||
4158 | if (Shift >= DstBits) | |||
4159 | return 0; | |||
4160 | ||||
4161 | // For immediate shifts we can fold the zero-/sign-extension into the shift. | |||
4162 | // {S|U}BFM Wd, Wn, #r, #s | |||
4163 | // Wd<s-r:0> = Wn<s:r> when r <= s | |||
4164 | ||||
4165 | // %1 = {s|z}ext i8 {0b1010_1010|0b0101_0101} to i16 | |||
4166 | // %2 = lshr i16 %1, 4 | |||
4167 | // Wd<7-4:0> = Wn<7:4> | |||
4168 | // 0b0000_0000_0000_0000__0000_1111_1111_1010 sext | |||
4169 | // 0b0000_0000_0000_0000__0000_0000_0000_0101 sext | zext | |||
4170 | // 0b0000_0000_0000_0000__0000_0000_0000_1010 zext | |||
4171 | ||||
4172 | // %1 = {s|z}ext i8 {0b1010_1010|0b0101_0101} to i16 | |||
4173 | // %2 = lshr i16 %1, 8 | |||
4174 | // Wd<7-7,0> = Wn<7:7> | |||
4175 | // 0b0000_0000_0000_0000__0000_0000_1111_1111 sext | |||
4176 | // 0b0000_0000_0000_0000__0000_0000_0000_0000 sext | |||
4177 | // 0b0000_0000_0000_0000__0000_0000_0000_0000 zext | |||
4178 | ||||
4179 | // %1 = {s|z}ext i8 {0b1010_1010|0b0101_0101} to i16 | |||
4180 | // %2 = lshr i16 %1, 12 | |||
4181 | // Wd<7-7,0> = Wn<7:7> <- clamp r to 7 | |||
4182 | // 0b0000_0000_0000_0000__0000_0000_0000_1111 sext | |||
4183 | // 0b0000_0000_0000_0000__0000_0000_0000_0000 sext | |||
4184 | // 0b0000_0000_0000_0000__0000_0000_0000_0000 zext | |||
4185 | ||||
4186 | if (Shift >= SrcBits && IsZExt) | |||
4187 | return materializeInt(ConstantInt::get(*Context, APInt(RegSize, 0)), RetVT); | |||
4188 | ||||
4189 | // It is not possible to fold a sign-extend into the LShr instruction. In this | |||
4190 | // case emit a sign-extend. | |||
4191 | if (!IsZExt) { | |||
4192 | Op0 = emitIntExt(SrcVT, Op0, RetVT, IsZExt); | |||
4193 | if (!Op0) | |||
4194 | return 0; | |||
4195 | Op0IsKill = true; | |||
4196 | SrcVT = RetVT; | |||
4197 | SrcBits = SrcVT.getSizeInBits(); | |||
4198 | IsZExt = true; | |||
4199 | } | |||
4200 | ||||
4201 | unsigned ImmR = std::min<unsigned>(SrcBits - 1, Shift); | |||
4202 | unsigned ImmS = SrcBits - 1; | |||
4203 | static const unsigned OpcTable[2][2] = { | |||
4204 | {AArch64::SBFMWri, AArch64::SBFMXri}, | |||
4205 | {AArch64::UBFMWri, AArch64::UBFMXri} | |||
4206 | }; | |||
4207 | unsigned Opc = OpcTable[IsZExt][Is64Bit]; | |||
4208 | if (SrcVT.SimpleTy <= MVT::i32 && RetVT == MVT::i64) { | |||
4209 | unsigned TmpReg = MRI.createVirtualRegister(RC); | |||
4210 | BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, | |||
4211 | TII.get(AArch64::SUBREG_TO_REG), TmpReg) | |||
4212 | .addImm(0) | |||
4213 | .addReg(Op0, getKillRegState(Op0IsKill)) | |||
4214 | .addImm(AArch64::sub_32); | |||
4215 | Op0 = TmpReg; | |||
4216 | Op0IsKill = true; | |||
4217 | } | |||
4218 | return fastEmitInst_rii(Opc, RC, Op0, Op0IsKill, ImmR, ImmS); | |||
4219 | } | |||
4220 | ||||
4221 | unsigned AArch64FastISel::emitASR_rr(MVT RetVT, unsigned Op0Reg, bool Op0IsKill, | |||
4222 | unsigned Op1Reg, bool Op1IsKill) { | |||
4223 | unsigned Opc = 0; | |||
4224 | bool NeedTrunc = false; | |||
4225 | uint64_t Mask = 0; | |||
4226 | switch (RetVT.SimpleTy) { | |||
4227 | default: return 0; | |||
4228 | case MVT::i8: Opc = AArch64::ASRVWr; NeedTrunc = true; Mask = 0xff; break; | |||
4229 | case MVT::i16: Opc = AArch64::ASRVWr; NeedTrunc = true; Mask = 0xffff; break; | |||
4230 | case MVT::i32: Opc = AArch64::ASRVWr; break; | |||
4231 | case MVT::i64: Opc = AArch64::ASRVXr; break; | |||
4232 | } | |||
4233 | ||||
4234 | const TargetRegisterClass *RC = | |||
4235 | (RetVT == MVT::i64) ? &AArch64::GPR64RegClass : &AArch64::GPR32RegClass; | |||
4236 | if (NeedTrunc) { | |||
4237 | Op0Reg = emitIntExt(RetVT, Op0Reg, MVT::i32, /*IsZExt=*/false); | |||
4238 | Op1Reg = emitAnd_ri(MVT::i32, Op1Reg, Op1IsKill, Mask); | |||
4239 | Op0IsKill = Op1IsKill = true; | |||
4240 | } | |||
4241 | unsigned ResultReg = fastEmitInst_rr(Opc, RC, Op0Reg, Op0IsKill, Op1Reg, | |||
4242 | Op1IsKill); | |||
4243 | if (NeedTrunc) | |||
4244 | ResultReg = emitAnd_ri(MVT::i32, ResultReg, /*IsKill=*/true, Mask); | |||
4245 | return ResultReg; | |||
4246 | } | |||
4247 | ||||
4248 | unsigned AArch64FastISel::emitASR_ri(MVT RetVT, MVT SrcVT, unsigned Op0, | |||
4249 | bool Op0IsKill, uint64_t Shift, | |||
4250 | bool IsZExt) { | |||
4251 | assert(RetVT.SimpleTy >= SrcVT.SimpleTy &&(static_cast <bool> (RetVT.SimpleTy >= SrcVT.SimpleTy && "Unexpected source/return type pair.") ? void (0) : __assert_fail ("RetVT.SimpleTy >= SrcVT.SimpleTy && \"Unexpected source/return type pair.\"" , "/build/llvm-toolchain-snapshot-7~svn326246/lib/Target/AArch64/AArch64FastISel.cpp" , 4252, __extension__ __PRETTY_FUNCTION__)) | |||
4252 | "Unexpected source/return type pair.")(static_cast <bool> (RetVT.SimpleTy >= SrcVT.SimpleTy && "Unexpected source/return type pair.") ? void (0) : __assert_fail ("RetVT.SimpleTy >= SrcVT.SimpleTy && \"Unexpected source/return type pair.\"" , "/build/llvm-toolchain-snapshot-7~svn326246/lib/Target/AArch64/AArch64FastISel.cpp" , 4252, __extension__ __PRETTY_FUNCTION__)); | |||
4253 | assert((SrcVT == MVT::i1 || SrcVT == MVT::i8 || SrcVT == MVT::i16 ||(static_cast <bool> ((SrcVT == MVT::i1 || SrcVT == MVT:: i8 || SrcVT == MVT::i16 || SrcVT == MVT::i32 || SrcVT == MVT:: i64) && "Unexpected source value type.") ? void (0) : __assert_fail ("(SrcVT == MVT::i1 || SrcVT == MVT::i8 || SrcVT == MVT::i16 || SrcVT == MVT::i32 || SrcVT == MVT::i64) && \"Unexpected source value type.\"" , "/build/llvm-toolchain-snapshot-7~svn326246/lib/Target/AArch64/AArch64FastISel.cpp" , 4255, __extension__ __PRETTY_FUNCTION__)) | |||
4254 | SrcVT == MVT::i32 || SrcVT == MVT::i64) &&(static_cast <bool> ((SrcVT == MVT::i1 || SrcVT == MVT:: i8 || SrcVT == MVT::i16 || SrcVT == MVT::i32 || SrcVT == MVT:: i64) && "Unexpected source value type.") ? void (0) : __assert_fail ("(SrcVT == MVT::i1 || SrcVT == MVT::i8 || SrcVT == MVT::i16 || SrcVT == MVT::i32 || SrcVT == MVT::i64) && \"Unexpected source value type.\"" , "/build/llvm-toolchain-snapshot-7~svn326246/lib/Target/AArch64/AArch64FastISel.cpp" , 4255, __extension__ __PRETTY_FUNCTION__)) | |||
4255 | "Unexpected source value type.")(static_cast <bool> ((SrcVT == MVT::i1 || SrcVT == MVT:: i8 || SrcVT == MVT::i16 || SrcVT == MVT::i32 || SrcVT == MVT:: i64) && "Unexpected source value type.") ? void (0) : __assert_fail ("(SrcVT == MVT::i1 || SrcVT == MVT::i8 || SrcVT == MVT::i16 || SrcVT == MVT::i32 || SrcVT == MVT::i64) && \"Unexpected source value type.\"" , "/build/llvm-toolchain-snapshot-7~svn326246/lib/Target/AArch64/AArch64FastISel.cpp" , 4255, __extension__ __PRETTY_FUNCTION__)); | |||
4256 | assert((RetVT == MVT::i8 || RetVT == MVT::i16 || RetVT == MVT::i32 ||(static_cast <bool> ((RetVT == MVT::i8 || RetVT == MVT:: i16 || RetVT == MVT::i32 || RetVT == MVT::i64) && "Unexpected return value type." ) ? void (0) : __assert_fail ("(RetVT == MVT::i8 || RetVT == MVT::i16 || RetVT == MVT::i32 || RetVT == MVT::i64) && \"Unexpected return value type.\"" , "/build/llvm-toolchain-snapshot-7~svn326246/lib/Target/AArch64/AArch64FastISel.cpp" , 4257, __extension__ __PRETTY_FUNCTION__)) | |||
4257 | RetVT == MVT::i64) && "Unexpected return value type.")(static_cast <bool> ((RetVT == MVT::i8 || RetVT == MVT:: i16 || RetVT == MVT::i32 || RetVT == MVT::i64) && "Unexpected return value type." ) ? void (0) : __assert_fail ("(RetVT == MVT::i8 || RetVT == MVT::i16 || RetVT == MVT::i32 || RetVT == MVT::i64) && \"Unexpected return value type.\"" , "/build/llvm-toolchain-snapshot-7~svn326246/lib/Target/AArch64/AArch64FastISel.cpp" , 4257, __extension__ __PRETTY_FUNCTION__)); | |||
4258 | ||||
4259 | bool Is64Bit = (RetVT == MVT::i64); | |||
4260 | unsigned RegSize = Is64Bit ? 64 : 32; | |||
4261 | unsigned DstBits = RetVT.getSizeInBits(); | |||
4262 | unsigned SrcBits = SrcVT.getSizeInBits(); | |||
4263 | const TargetRegisterClass *RC = | |||
4264 | Is64Bit ? &AArch64::GPR64RegClass : &AArch64::GPR32RegClass; | |||
4265 | ||||
4266 | // Just emit a copy for "zero" shifts. | |||
4267 | if (Shift == 0) { | |||
4268 | if (RetVT == SrcVT) { | |||
4269 | unsigned ResultReg = createResultReg(RC); | |||
4270 | BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, | |||
4271 | TII.get(TargetOpcode::COPY), ResultReg) | |||
4272 | .addReg(Op0, getKillRegState(Op0IsKill)); | |||
4273 | return ResultReg; | |||
4274 | } else | |||
4275 | return emitIntExt(SrcVT, Op0, RetVT, IsZExt); | |||
4276 | } | |||
4277 | ||||
4278 | // Don't deal with undefined shifts. | |||
4279 | if (Shift >= DstBits) | |||
4280 | return 0; | |||
4281 | ||||
4282 | // For immediate shifts we can fold the zero-/sign-extension into the shift. | |||
4283 | // {S|U}BFM Wd, Wn, #r, #s | |||
4284 | // Wd<s-r:0> = Wn<s:r> when r <= s | |||
4285 | ||||
4286 | // %1 = {s|z}ext i8 {0b1010_1010|0b0101_0101} to i16 | |||
4287 | // %2 = ashr i16 %1, 4 | |||
4288 | // Wd<7-4:0> = Wn<7:4> | |||
4289 | // 0b1111_1111_1111_1111__1111_1111_1111_1010 sext | |||
4290 | // 0b0000_0000_0000_0000__0000_0000_0000_0101 sext | zext | |||
4291 | // 0b0000_0000_0000_0000__0000_0000_0000_1010 zext | |||
4292 | ||||
4293 | // %1 = {s|z}ext i8 {0b1010_1010|0b0101_0101} to i16 | |||
4294 | // %2 = ashr i16 %1, 8 | |||
4295 | // Wd<7-7,0> = Wn<7:7> | |||
4296 | // 0b1111_1111_1111_1111__1111_1111_1111_1111 sext | |||
4297 | // 0b0000_0000_0000_0000__0000_0000_0000_0000 sext | |||
4298 | // 0b0000_0000_0000_0000__0000_0000_0000_0000 zext | |||
4299 | ||||
4300 | // %1 = {s|z}ext i8 {0b1010_1010|0b0101_0101} to i16 | |||
4301 | // %2 = ashr i16 %1, 12 | |||
4302 | // Wd<7-7,0> = Wn<7:7> <- clamp r to 7 | |||
4303 | // 0b1111_1111_1111_1111__1111_1111_1111_1111 sext | |||
4304 | // 0b0000_0000_0000_0000__0000_0000_0000_0000 sext | |||
4305 | // 0b0000_0000_0000_0000__0000_0000_0000_0000 zext | |||
4306 | ||||
4307 | if (Shift >= SrcBits && IsZExt) | |||
4308 | return materializeInt(ConstantInt::get(*Context, APInt(RegSize, 0)), RetVT); | |||
4309 | ||||
4310 | unsigned ImmR = std::min<unsigned>(SrcBits - 1, Shift); | |||
4311 | unsigned ImmS = SrcBits - 1; | |||
4312 | static const unsigned OpcTable[2][2] = { | |||
4313 | {AArch64::SBFMWri, AArch64::SBFMXri}, | |||
4314 | {AArch64::UBFMWri, AArch64::UBFMXri} | |||
4315 | }; | |||
4316 | unsigned Opc = OpcTable[IsZExt][Is64Bit]; | |||
4317 | if (SrcVT.SimpleTy <= MVT::i32 && RetVT == MVT::i64) { | |||
4318 | unsigned TmpReg = MRI.createVirtualRegister(RC); | |||
4319 | BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, | |||
4320 | TII.get(AArch64::SUBREG_TO_REG), TmpReg) | |||
4321 | .addImm(0) | |||
4322 | .addReg(Op0, getKillRegState(Op0IsKill)) | |||
4323 | .addImm(AArch64::sub_32); | |||
4324 | Op0 = TmpReg; | |||
4325 | Op0IsKill = true; | |||
4326 | } | |||
4327 | return fastEmitInst_rii(Opc, RC, Op0, Op0IsKill, ImmR, ImmS); | |||
4328 | } | |||
4329 | ||||
4330 | unsigned AArch64FastISel::emitIntExt(MVT SrcVT, unsigned SrcReg, MVT DestVT, | |||
4331 | bool IsZExt) { | |||
4332 | assert(DestVT != MVT::i1 && "ZeroExt/SignExt an i1?")(static_cast <bool> (DestVT != MVT::i1 && "ZeroExt/SignExt an i1?" ) ? void (0) : __assert_fail ("DestVT != MVT::i1 && \"ZeroExt/SignExt an i1?\"" , "/build/llvm-toolchain-snapshot-7~svn326246/lib/Target/AArch64/AArch64FastISel.cpp" , 4332, __extension__ __PRETTY_FUNCTION__)); | |||
4333 | ||||
4334 | // FastISel does not have plumbing to deal with extensions where the SrcVT or | |||
4335 | // DestVT are odd things, so test to make sure that they are both types we can | |||
4336 | // handle (i1/i8/i16/i32 for SrcVT and i8/i16/i32/i64 for DestVT), otherwise | |||
4337 | // bail out to SelectionDAG. | |||
4338 | if (((DestVT != MVT::i8) && (DestVT != MVT::i16) && | |||
4339 | (DestVT != MVT::i32) && (DestVT != MVT::i64)) || | |||
4340 | ((SrcVT != MVT::i1) && (SrcVT != MVT::i8) && | |||
4341 | (SrcVT != MVT::i16) && (SrcVT != MVT::i32))) | |||
4342 | return 0; | |||
4343 | ||||
4344 | unsigned Opc; | |||
4345 | unsigned Imm = 0; | |||
4346 | ||||
4347 | switch (SrcVT.SimpleTy) { | |||
4348 | default: | |||
4349 | return 0; | |||
4350 | case MVT::i1: | |||
4351 | return emiti1Ext(SrcReg, DestVT, IsZExt); | |||
4352 | case MVT::i8: | |||
4353 | if (DestVT == MVT::i64) | |||
4354 | Opc = IsZExt ? AArch64::UBFMXri : AArch64::SBFMXri; | |||
4355 | else | |||
4356 | Opc = IsZExt ? AArch64::UBFMWri : AArch64::SBFMWri; | |||
4357 | Imm = 7; | |||
4358 | break; | |||
4359 | case MVT::i16: | |||
4360 | if (DestVT == MVT::i64) | |||
4361 | Opc = IsZExt ? AArch64::UBFMXri : AArch64::SBFMXri; | |||
4362 | else | |||
4363 | Opc = IsZExt ? AArch64::UBFMWri : AArch64::SBFMWri; | |||
4364 | Imm = 15; | |||
4365 | break; | |||
4366 | case MVT::i32: | |||
4367 | assert(DestVT == MVT::i64 && "IntExt i32 to i32?!?")(static_cast <bool> (DestVT == MVT::i64 && "IntExt i32 to i32?!?" ) ? void (0) : __assert_fail ("DestVT == MVT::i64 && \"IntExt i32 to i32?!?\"" , "/build/llvm-toolchain-snapshot-7~svn326246/lib/Target/AArch64/AArch64FastISel.cpp" , 4367, __extension__ __PRETTY_FUNCTION__)); | |||
4368 | Opc = IsZExt ? AArch64::UBFMXri : AArch64::SBFMXri; | |||
4369 | Imm = 31; | |||
4370 | break; | |||
4371 | } | |||
4372 | ||||
4373 | // Handle i8 and i16 as i32. | |||
4374 | if (DestVT == MVT::i8 || DestVT == MVT::i16) | |||
4375 | DestVT = MVT::i32; | |||
4376 | else if (DestVT == MVT::i64) { | |||
4377 | unsigned Src64 = MRI.createVirtualRegister(&AArch64::GPR64RegClass); | |||
4378 | BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, | |||
4379 | TII.get(AArch64::SUBREG_TO_REG), Src64) | |||
4380 | .addImm(0) | |||
4381 | .addReg(SrcReg) | |||
4382 | .addImm(AArch64::sub_32); | |||
4383 | SrcReg = Src64; | |||
4384 | } | |||
4385 | ||||
4386 | const TargetRegisterClass *RC = | |||
4387 | (DestVT == MVT::i64) ? &AArch64::GPR64RegClass : &AArch64::GPR32RegClass; | |||
4388 | return fastEmitInst_rii(Opc, RC, SrcReg, /*TODO:IsKill=*/false, 0, Imm); | |||
4389 | } | |||
4390 | ||||
4391 | static bool isZExtLoad(const MachineInstr *LI) { | |||
4392 | switch (LI->getOpcode()) { | |||
4393 | default: | |||
4394 | return false; | |||
4395 | case AArch64::LDURBBi: | |||
4396 | case AArch64::LDURHHi: | |||
4397 | case AArch64::LDURWi: | |||
4398 | case AArch64::LDRBBui: | |||
4399 | case AArch64::LDRHHui: | |||
4400 | case AArch64::LDRWui: | |||
4401 | case AArch64::LDRBBroX: | |||
4402 | case AArch64::LDRHHroX: | |||
4403 | case AArch64::LDRWroX: | |||
4404 | case AArch64::LDRBBroW: | |||
4405 | case AArch64::LDRHHroW: | |||
4406 | case AArch64::LDRWroW: | |||
4407 | return true; | |||
4408 | } | |||
4409 | } | |||
4410 | ||||
4411 | static bool isSExtLoad(const MachineInstr *LI) { | |||
4412 | switch (LI->getOpcode()) { | |||
4413 | default: | |||
4414 | return false; | |||
4415 | case AArch64::LDURSBWi: | |||
4416 | case AArch64::LDURSHWi: | |||
4417 | case AArch64::LDURSBXi: | |||
4418 | case AArch64::LDURSHXi: | |||
4419 | case AArch64::LDURSWi: | |||
4420 | case AArch64::LDRSBWui: | |||
4421 | case AArch64::LDRSHWui: | |||
4422 | case AArch64::LDRSBXui: | |||
4423 | case AArch64::LDRSHXui: | |||
4424 | case AArch64::LDRSWui: | |||
4425 | case AArch64::LDRSBWroX: | |||
4426 | case AArch64::LDRSHWroX: | |||
4427 | case AArch64::LDRSBXroX: | |||
4428 | case AArch64::LDRSHXroX: | |||
4429 | case AArch64::LDRSWroX: | |||
4430 | case AArch64::LDRSBWroW: | |||
4431 | case AArch64::LDRSHWroW: | |||
4432 | case AArch64::LDRSBXroW: | |||
4433 | case AArch64::LDRSHXroW: | |||
4434 | case AArch64::LDRSWroW: | |||
4435 | return true; | |||
4436 | } | |||
4437 | } | |||
4438 | ||||
4439 | bool AArch64FastISel::optimizeIntExtLoad(const Instruction *I, MVT RetVT, | |||
4440 | MVT SrcVT) { | |||
4441 | const auto *LI = dyn_cast<LoadInst>(I->getOperand(0)); | |||
4442 | if (!LI || !LI->hasOneUse()) | |||
4443 | return false; | |||
4444 | ||||
4445 | // Check if the load instruction has already been selected. | |||
4446 | unsigned Reg = lookUpRegForValue(LI); | |||
4447 | if (!Reg) | |||
4448 | return false; | |||
4449 | ||||
4450 | MachineInstr *MI = MRI.getUniqueVRegDef(Reg); | |||
4451 | if (!MI) | |||
4452 | return false; | |||
4453 | ||||
4454 | // Check if the correct load instruction has been emitted - SelectionDAG might | |||
4455 | // have emitted a zero-extending load, but we need a sign-extending load. | |||
4456 | bool IsZExt = isa<ZExtInst>(I); | |||
4457 | const auto *LoadMI = MI; | |||
4458 | if (LoadMI->getOpcode() == TargetOpcode::COPY && | |||
4459 | LoadMI->getOperand(1).getSubReg() == AArch64::sub_32) { | |||
4460 | unsigned LoadReg = MI->getOperand(1).getReg(); | |||
4461 | LoadMI = MRI.getUniqueVRegDef(LoadReg); | |||
4462 | assert(LoadMI && "Expected valid instruction")(static_cast <bool> (LoadMI && "Expected valid instruction" ) ? void (0) : __assert_fail ("LoadMI && \"Expected valid instruction\"" , "/build/llvm-toolchain-snapshot-7~svn326246/lib/Target/AArch64/AArch64FastISel.cpp" , 4462, __extension__ __PRETTY_FUNCTION__)); | |||
4463 | } | |||
4464 | if (!(IsZExt && isZExtLoad(LoadMI)) && !(!IsZExt && isSExtLoad(LoadMI))) | |||
4465 | return false; | |||
4466 | ||||
4467 | // Nothing to be done. | |||
4468 | if (RetVT != MVT::i64 || SrcVT > MVT::i32) { | |||
4469 | updateValueMap(I, Reg); | |||
4470 | return true; | |||
4471 | } | |||
4472 | ||||
4473 | if (IsZExt) { | |||
4474 | unsigned Reg64 = createResultReg(&AArch64::GPR64RegClass); | |||
4475 | BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, | |||
4476 | TII.get(AArch64::SUBREG_TO_REG), Reg64) | |||
4477 | .addImm(0) | |||
4478 | .addReg(Reg, getKillRegState(true)) | |||
4479 | .addImm(AArch64::sub_32); | |||
4480 | Reg = Reg64; | |||
4481 | } else { | |||
4482 | assert((MI->getOpcode() == TargetOpcode::COPY &&(static_cast <bool> ((MI->getOpcode() == TargetOpcode ::COPY && MI->getOperand(1).getSubReg() == AArch64 ::sub_32) && "Expected copy instruction") ? void (0) : __assert_fail ("(MI->getOpcode() == TargetOpcode::COPY && MI->getOperand(1).getSubReg() == AArch64::sub_32) && \"Expected copy instruction\"" , "/build/llvm-toolchain-snapshot-7~svn326246/lib/Target/AArch64/AArch64FastISel.cpp" , 4484, __extension__ __PRETTY_FUNCTION__)) | |||
4483 | MI->getOperand(1).getSubReg() == AArch64::sub_32) &&(static_cast <bool> ((MI->getOpcode() == TargetOpcode ::COPY && MI->getOperand(1).getSubReg() == AArch64 ::sub_32) && "Expected copy instruction") ? void (0) : __assert_fail ("(MI->getOpcode() == TargetOpcode::COPY && MI->getOperand(1).getSubReg() == AArch64::sub_32) && \"Expected copy instruction\"" , "/build/llvm-toolchain-snapshot-7~svn326246/lib/Target/AArch64/AArch64FastISel.cpp" , 4484, __extension__ __PRETTY_FUNCTION__)) | |||
4484 | "Expected copy instruction")(static_cast <bool> ((MI->getOpcode() == TargetOpcode ::COPY && MI->getOperand(1).getSubReg() == AArch64 ::sub_32) && "Expected copy instruction") ? void (0) : __assert_fail ("(MI->getOpcode() == TargetOpcode::COPY && MI->getOperand(1).getSubReg() == AArch64::sub_32) && \"Expected copy instruction\"" , "/build/llvm-toolchain-snapshot-7~svn326246/lib/Target/AArch64/AArch64FastISel.cpp" , 4484, __extension__ __PRETTY_FUNCTION__)); | |||
4485 | Reg = MI->getOperand(1).getReg(); | |||
4486 | MI->eraseFromParent(); | |||
4487 | } | |||
4488 | updateValueMap(I, Reg); | |||
4489 | return true; | |||
4490 | } | |||
4491 | ||||
4492 | bool AArch64FastISel::selectIntExt(const Instruction *I) { | |||
4493 | assert((isa<ZExtInst>(I) || isa<SExtInst>(I)) &&(static_cast <bool> ((isa<ZExtInst>(I) || isa< SExtInst>(I)) && "Unexpected integer extend instruction." ) ? void (0) : __assert_fail ("(isa<ZExtInst>(I) || isa<SExtInst>(I)) && \"Unexpected integer extend instruction.\"" , "/build/llvm-toolchain-snapshot-7~svn326246/lib/Target/AArch64/AArch64FastISel.cpp" , 4494, __extension__ __PRETTY_FUNCTION__)) | |||
4494 | "Unexpected integer extend instruction.")(static_cast <bool> ((isa<ZExtInst>(I) || isa< SExtInst>(I)) && "Unexpected integer extend instruction." ) ? void (0) : __assert_fail ("(isa<ZExtInst>(I) || isa<SExtInst>(I)) && \"Unexpected integer extend instruction.\"" , "/build/llvm-toolchain-snapshot-7~svn326246/lib/Target/AArch64/AArch64FastISel.cpp" , 4494, __extension__ __PRETTY_FUNCTION__)); | |||
4495 | MVT RetVT; | |||
4496 | MVT SrcVT; | |||
4497 | if (!isTypeSupported(I->getType(), RetVT)) | |||
4498 | return false; | |||
4499 | ||||
4500 | if (!isTypeSupported(I->getOperand(0)->getType(), SrcVT)) | |||
4501 | return false; | |||
4502 | ||||
4503 | // Try to optimize already sign-/zero-extended values from load instructions. | |||
4504 | if (optimizeIntExtLoad(I, RetVT, SrcVT)) | |||
4505 | return true; | |||
4506 | ||||
4507 | unsigned SrcReg = getRegForValue(I->getOperand(0)); | |||
4508 | if (!SrcReg) | |||
4509 | return false; | |||
4510 | bool SrcIsKill = hasTrivialKill(I->getOperand(0)); | |||
4511 | ||||
4512 | // Try to optimize already sign-/zero-extended values from function arguments. | |||
4513 | bool IsZExt = isa<ZExtInst>(I); | |||
4514 | if (const auto *Arg = dyn_cast<Argument>(I->getOperand(0))) { | |||
4515 | if ((IsZExt && Arg->hasZExtAttr()) || (!IsZExt && Arg->hasSExtAttr())) { | |||
4516 | if (RetVT == MVT::i64 && SrcVT != MVT::i64) { | |||
4517 | unsigned ResultReg = createResultReg(&AArch64::GPR64RegClass); | |||
4518 | BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, | |||
4519 | TII.get(AArch64::SUBREG_TO_REG), ResultReg) | |||
4520 | .addImm(0) | |||
4521 | .addReg(SrcReg, getKillRegState(SrcIsKill)) | |||
4522 | .addImm(AArch64::sub_32); | |||
4523 | SrcReg = ResultReg; | |||
4524 | } | |||
4525 | // Conservatively clear all kill flags from all uses, because we are | |||
4526 | // replacing a sign-/zero-extend instruction at IR level with a nop at MI | |||
4527 | // level. The result of the instruction at IR level might have been | |||
4528 | // trivially dead, which is now not longer true. | |||
4529 | unsigned UseReg = lookUpRegForValue(I); | |||
4530 | if (UseReg) | |||
4531 | MRI.clearKillFlags(UseReg); | |||
4532 | ||||
4533 | updateValueMap(I, SrcReg); | |||
4534 | return true; | |||
4535 | } | |||
4536 | } | |||
4537 | ||||
4538 | unsigned ResultReg = emitIntExt(SrcVT, SrcReg, RetVT, IsZExt); | |||
4539 | if (!ResultReg) | |||
4540 | return false; | |||
4541 | ||||
4542 | updateValueMap(I, ResultReg); | |||
4543 | return true; | |||
4544 | } | |||
4545 | ||||
4546 | bool AArch64FastISel::selectRem(const Instruction *I, unsigned ISDOpcode) { | |||
4547 | EVT DestEVT = TLI.getValueType(DL, I->getType(), true); | |||
4548 | if (!DestEVT.isSimple()) | |||
4549 | return false; | |||
4550 | ||||
4551 | MVT DestVT = DestEVT.getSimpleVT(); | |||
4552 | if (DestVT != MVT::i64 && DestVT != MVT::i32) | |||
4553 | return false; | |||
4554 | ||||
4555 | unsigned DivOpc; | |||
4556 | bool Is64bit = (DestVT == MVT::i64); | |||
4557 | switch (ISDOpcode) { | |||
4558 | default: | |||
4559 | return false; | |||
4560 | case ISD::SREM: | |||
4561 | DivOpc = Is64bit ? AArch64::SDIVXr : AArch64::SDIVWr; | |||
4562 | break; | |||
4563 | case ISD::UREM: | |||
4564 | DivOpc = Is64bit ? AArch64::UDIVXr : AArch64::UDIVWr; | |||
4565 | break; | |||
4566 | } | |||
4567 | unsigned MSubOpc = Is64bit ? AArch64::MSUBXrrr : AArch64::MSUBWrrr; | |||
4568 | unsigned Src0Reg = getRegForValue(I->getOperand(0)); | |||
4569 | if (!Src0Reg) | |||
4570 | return false; | |||
4571 | bool Src0IsKill = hasTrivialKill(I->getOperand(0)); | |||
4572 | ||||
4573 | unsigned Src1Reg = getRegForValue(I->getOperand(1)); | |||
4574 | if (!Src1Reg) | |||
4575 | return false; | |||
4576 | bool Src1IsKill = hasTrivialKill(I->getOperand(1)); | |||
4577 | ||||
4578 | const TargetRegisterClass *RC = | |||
4579 | (DestVT == MVT::i64) ? &AArch64::GPR64RegClass : &AArch64::GPR32RegClass; | |||
4580 | unsigned QuotReg = fastEmitInst_rr(DivOpc, RC, Src0Reg, /*IsKill=*/false, | |||
4581 | Src1Reg, /*IsKill=*/false); | |||
4582 | assert(QuotReg && "Unexpected DIV instruction emission failure.")(static_cast <bool> (QuotReg && "Unexpected DIV instruction emission failure." ) ? void (0) : __assert_fail ("QuotReg && \"Unexpected DIV instruction emission failure.\"" , "/build/llvm-toolchain-snapshot-7~svn326246/lib/Target/AArch64/AArch64FastISel.cpp" , 4582, __extension__ __PRETTY_FUNCTION__)); | |||
4583 | // The remainder is computed as numerator - (quotient * denominator) using the | |||
4584 | // MSUB instruction. | |||
4585 | unsigned ResultReg = fastEmitInst_rrr(MSubOpc, RC, QuotReg, /*IsKill=*/true, | |||
4586 | Src1Reg, Src1IsKill, Src0Reg, | |||
4587 | Src0IsKill); | |||
4588 | updateValueMap(I, ResultReg); | |||
4589 | return true; | |||
4590 | } | |||
4591 | ||||
4592 | bool AArch64FastISel::selectMul(const Instruction *I) { | |||
4593 | MVT VT; | |||
4594 | if (!isTypeSupported(I->getType(), VT, /*IsVectorAllowed=*/true)) | |||
4595 | return false; | |||
4596 | ||||
4597 | if (VT.isVector()) | |||
4598 | return selectBinaryOp(I, ISD::MUL); | |||
4599 | ||||
4600 | const Value *Src0 = I->getOperand(0); | |||
4601 | const Value *Src1 = I->getOperand(1); | |||
4602 | if (const auto *C = dyn_cast<ConstantInt>(Src0)) | |||
4603 | if (C->getValue().isPowerOf2()) | |||
4604 | std::swap(Src0, Src1); | |||
4605 | ||||
4606 | // Try to simplify to a shift instruction. | |||
4607 | if (const auto *C = dyn_cast<ConstantInt>(Src1)) | |||
4608 | if (C->getValue().isPowerOf2()) { | |||
4609 | uint64_t ShiftVal = C->getValue().logBase2(); | |||
4610 | MVT SrcVT = VT; | |||
4611 | bool IsZExt = true; | |||
4612 | if (const auto *ZExt = dyn_cast<ZExtInst>(Src0)) { | |||
4613 | if (!isIntExtFree(ZExt)) { | |||
4614 | MVT VT; | |||
4615 | if (isValueAvailable(ZExt) && isTypeSupported(ZExt->getSrcTy(), VT)) { | |||
4616 | SrcVT = VT; | |||
4617 | IsZExt = true; | |||
4618 | Src0 = ZExt->getOperand(0); | |||
4619 | } | |||
4620 | } | |||
4621 | } else if (const auto *SExt = dyn_cast<SExtInst>(Src0)) { | |||
4622 | if (!isIntExtFree(SExt)) { | |||
4623 | MVT VT; | |||
4624 | if (isValueAvailable(SExt) && isTypeSupported(SExt->getSrcTy(), VT)) { | |||
4625 | SrcVT = VT; | |||
4626 | IsZExt = false; | |||
4627 | Src0 = SExt->getOperand(0); | |||
4628 | } | |||
4629 | } | |||
4630 | } | |||
4631 | ||||
4632 | unsigned Src0Reg = getRegForValue(Src0); | |||
4633 | if (!Src0Reg) | |||
4634 | return false; | |||
4635 | bool Src0IsKill = hasTrivialKill(Src0); | |||
4636 | ||||
4637 | unsigned ResultReg = | |||
4638 | emitLSL_ri(VT, SrcVT, Src0Reg, Src0IsKill, ShiftVal, IsZExt); | |||
4639 | ||||
4640 | if (ResultReg) { | |||
4641 | updateValueMap(I, ResultReg); | |||
4642 | return true; | |||
4643 | } | |||
4644 | } | |||
4645 | ||||
4646 | unsigned Src0Reg = getRegForValue(I->getOperand(0)); | |||
4647 | if (!Src0Reg) | |||
4648 | return false; | |||
4649 | bool Src0IsKill = hasTrivialKill(I->getOperand(0)); | |||
4650 | ||||
4651 | unsigned Src1Reg = getRegForValue(I->getOperand(1)); | |||
4652 | if (!Src1Reg) | |||
4653 | return false; | |||
4654 | bool Src1IsKill = hasTrivialKill(I->getOperand(1)); | |||
4655 | ||||
4656 | unsigned ResultReg = emitMul_rr(VT, Src0Reg, Src0IsKill, Src1Reg, Src1IsKill); | |||
4657 | ||||
4658 | if (!ResultReg) | |||
4659 | return false; | |||
4660 | ||||
4661 | updateValueMap(I, ResultReg); | |||
4662 | return true; | |||
4663 | } | |||
4664 | ||||
4665 | bool AArch64FastISel::selectShift(const Instruction *I) { | |||
4666 | MVT RetVT; | |||
4667 | if (!isTypeSupported(I->getType(), RetVT, /*IsVectorAllowed=*/true)) | |||
4668 | return false; | |||
4669 | ||||
4670 | if (RetVT.isVector()) | |||
4671 | return selectOperator(I, I->getOpcode()); | |||
4672 | ||||
4673 | if (const auto *C = dyn_cast<ConstantInt>(I->getOperand(1))) { | |||
4674 | unsigned ResultReg = 0; | |||
4675 | uint64_t ShiftVal = C->getZExtValue(); | |||
4676 | MVT SrcVT = RetVT; | |||
4677 | bool IsZExt = I->getOpcode() != Instruction::AShr; | |||
4678 | const Value *Op0 = I->getOperand(0); | |||
4679 | if (const auto *ZExt = dyn_cast<ZExtInst>(Op0)) { | |||
4680 | if (!isIntExtFree(ZExt)) { | |||
4681 | MVT TmpVT; | |||
4682 | if (isValueAvailable(ZExt) && isTypeSupported(ZExt->getSrcTy(), TmpVT)) { | |||
4683 | SrcVT = TmpVT; | |||
4684 | IsZExt = true; | |||
4685 | Op0 = ZExt->getOperand(0); | |||
4686 | } | |||
4687 | } | |||
4688 | } else if (const auto *SExt = dyn_cast<SExtInst>(Op0)) { | |||
4689 | if (!isIntExtFree(SExt)) { | |||
4690 | MVT TmpVT; | |||
4691 | if (isValueAvailable(SExt) && isTypeSupported(SExt->getSrcTy(), TmpVT)) { | |||
4692 | SrcVT = TmpVT; | |||
4693 | IsZExt = false; | |||
4694 | Op0 = SExt->getOperand(0); | |||
4695 | } | |||
4696 | } | |||
4697 | } | |||
4698 | ||||
4699 | unsigned Op0Reg = getRegForValue(Op0); | |||
4700 | if (!Op0Reg) | |||
4701 | return false; | |||
4702 | bool Op0IsKill = hasTrivialKill(Op0); | |||
4703 | ||||
4704 | switch (I->getOpcode()) { | |||
4705 | default: llvm_unreachable("Unexpected instruction.")::llvm::llvm_unreachable_internal("Unexpected instruction.", "/build/llvm-toolchain-snapshot-7~svn326246/lib/Target/AArch64/AArch64FastISel.cpp" , 4705); | |||
4706 | case Instruction::Shl: | |||
4707 | ResultReg = emitLSL_ri(RetVT, SrcVT, Op0Reg, Op0IsKill, ShiftVal, IsZExt); | |||
4708 | break; | |||
4709 | case Instruction::AShr: | |||
4710 | ResultReg = emitASR_ri(RetVT, SrcVT, Op0Reg, Op0IsKill, ShiftVal, IsZExt); | |||
4711 | break; | |||
4712 | case Instruction::LShr: | |||
4713 | ResultReg = emitLSR_ri(RetVT, SrcVT, Op0Reg, Op0IsKill, ShiftVal, IsZExt); | |||
4714 | break; | |||
4715 | } | |||
4716 | if (!ResultReg) | |||
4717 | return false; | |||
4718 | ||||
4719 | updateValueMap(I, ResultReg); | |||
4720 | return true; | |||
4721 | } | |||
4722 | ||||
4723 | unsigned Op0Reg = getRegForValue(I->getOperand(0)); | |||
4724 | if (!Op0Reg) | |||
4725 | return false; | |||
4726 | bool Op0IsKill = hasTrivialKill(I->getOperand(0)); | |||
4727 | ||||
4728 | unsigned Op1Reg = getRegForValue(I->getOperand(1)); | |||
4729 | if (!Op1Reg) | |||
4730 | return false; | |||
4731 | bool Op1IsKill = hasTrivialKill(I->getOperand(1)); | |||
4732 | ||||
4733 | unsigned ResultReg = 0; | |||
4734 | switch (I->getOpcode()) { | |||
4735 | default: llvm_unreachable("Unexpected instruction.")::llvm::llvm_unreachable_internal("Unexpected instruction.", "/build/llvm-toolchain-snapshot-7~svn326246/lib/Target/AArch64/AArch64FastISel.cpp" , 4735); | |||
4736 | case Instruction::Shl: | |||
4737 | ResultReg = emitLSL_rr(RetVT, Op0Reg, Op0IsKill, Op1Reg, Op1IsKill); | |||
4738 | break; | |||
4739 | case Instruction::AShr: | |||
4740 | ResultReg = emitASR_rr(RetVT, Op0Reg, Op0IsKill, Op1Reg, Op1IsKill); | |||
4741 | break; | |||
4742 | case Instruction::LShr: | |||
4743 | ResultReg = emitLSR_rr(RetVT, Op0Reg, Op0IsKill, Op1Reg, Op1IsKill); | |||
4744 | break; | |||
4745 | } | |||
4746 | ||||
4747 | if (!ResultReg) | |||
4748 | return false; | |||
4749 | ||||
4750 | updateValueMap(I, ResultReg); | |||
4751 | return true; | |||
4752 | } | |||
4753 | ||||
4754 | bool AArch64FastISel::selectBitCast(const Instruction *I) { | |||
4755 | MVT RetVT, SrcVT; | |||
4756 | ||||
4757 | if (!isTypeLegal(I->getOperand(0)->getType(), SrcVT)) | |||
4758 | return false; | |||
4759 | if (!isTypeLegal(I->getType(), RetVT)) | |||
4760 | return false; | |||
4761 | ||||
4762 | unsigned Opc; | |||
4763 | if (RetVT == MVT::f32 && SrcVT == MVT::i32) | |||
4764 | Opc = AArch64::FMOVWSr; | |||
4765 | else if (RetVT == MVT::f64 && SrcVT == MVT::i64) | |||
4766 | Opc = AArch64::FMOVXDr; | |||
4767 | else if (RetVT == MVT::i32 && SrcVT == MVT::f32) | |||
4768 | Opc = AArch64::FMOVSWr; | |||
4769 | else if (RetVT == MVT::i64 && SrcVT == MVT::f64) | |||
4770 | Opc = AArch64::FMOVDXr; | |||
4771 | else | |||
4772 | return false; | |||
4773 | ||||
4774 | const TargetRegisterClass *RC = nullptr; | |||
4775 | switch (RetVT.SimpleTy) { | |||
4776 | default: llvm_unreachable("Unexpected value type.")::llvm::llvm_unreachable_internal("Unexpected value type.", "/build/llvm-toolchain-snapshot-7~svn326246/lib/Target/AArch64/AArch64FastISel.cpp" , 4776); | |||
4777 | case MVT::i32: RC = &AArch64::GPR32RegClass; break; | |||
4778 | case MVT::i64: RC = &AArch64::GPR64RegClass; break; | |||
4779 | case MVT::f32: RC = &AArch64::FPR32RegClass; break; | |||
4780 | case MVT::f64: RC = &AArch64::FPR64RegClass; break; | |||
4781 | } | |||
4782 | unsigned Op0Reg = getRegForValue(I->getOperand(0)); | |||
4783 | if (!Op0Reg) | |||
4784 | return false; | |||
4785 | bool Op0IsKill = hasTrivialKill(I->getOperand(0)); | |||
4786 | unsigned ResultReg = fastEmitInst_r(Opc, RC, Op0Reg, Op0IsKill); | |||
4787 | ||||
4788 | if (!ResultReg) | |||
4789 | return false; | |||
4790 | ||||
4791 | updateValueMap(I, ResultReg); | |||
4792 | return true; | |||
4793 | } | |||
4794 | ||||
4795 | bool AArch64FastISel::selectFRem(const Instruction *I) { | |||
4796 | MVT RetVT; | |||
4797 | if (!isTypeLegal(I->getType(), RetVT)) | |||
4798 | return false; | |||
4799 | ||||
4800 | RTLIB::Libcall LC; | |||
4801 | switch (RetVT.SimpleTy) { | |||
4802 | default: | |||
4803 | return false; | |||
4804 | case MVT::f32: | |||
4805 | LC = RTLIB::REM_F32; | |||
4806 | break; | |||
4807 | case MVT::f64: | |||
4808 | LC = RTLIB::REM_F64; | |||
4809 | break; | |||
4810 | } | |||
4811 | ||||
4812 | ArgListTy Args; | |||
4813 | Args.reserve(I->getNumOperands()); | |||
4814 | ||||
4815 | // Populate the argument list. | |||
4816 | for (auto &Arg : I->operands()) { | |||
4817 | ArgListEntry Entry; | |||
4818 | Entry.Val = Arg; | |||
4819 | Entry.Ty = Arg->getType(); | |||
4820 | Args.push_back(Entry); | |||
4821 | } | |||
4822 | ||||
4823 | CallLoweringInfo CLI; | |||
4824 | MCContext &Ctx = MF->getContext(); | |||
4825 | CLI.setCallee(DL, Ctx, TLI.getLibcallCallingConv(LC), I->getType(), | |||
4826 | TLI.getLibcallName(LC), std::move(Args)); | |||
4827 | if (!lowerCallTo(CLI)) | |||
4828 | return false; | |||
4829 | updateValueMap(I, CLI.ResultReg); | |||
4830 | return true; | |||
4831 | } | |||
4832 | ||||
4833 | bool AArch64FastISel::selectSDiv(const Instruction *I) { | |||
4834 | MVT VT; | |||
4835 | if (!isTypeLegal(I->getType(), VT)) | |||
| ||||
4836 | return false; | |||
4837 | ||||
4838 | if (!isa<ConstantInt>(I->getOperand(1))) | |||
4839 | return selectBinaryOp(I, ISD::SDIV); | |||
4840 | ||||
4841 | const APInt &C = cast<ConstantInt>(I->getOperand(1))->getValue(); | |||
4842 | if ((VT != MVT::i32 && VT != MVT::i64) || !C || | |||
4843 | !(C.isPowerOf2() || (-C).isPowerOf2())) | |||
4844 | return selectBinaryOp(I, ISD::SDIV); | |||
4845 | ||||
4846 | unsigned Lg2 = C.countTrailingZeros(); | |||
4847 | unsigned Src0Reg = getRegForValue(I->getOperand(0)); | |||
4848 | if (!Src0Reg) | |||
4849 | return false; | |||
4850 | bool Src0IsKill = hasTrivialKill(I->getOperand(0)); | |||
4851 | ||||
4852 | if (cast<BinaryOperator>(I)->isExact()) { | |||
4853 | unsigned ResultReg = emitASR_ri(VT, VT, Src0Reg, Src0IsKill, Lg2); | |||
4854 | if (!ResultReg) | |||
4855 | return false; | |||
4856 | updateValueMap(I, ResultReg); | |||
4857 | return true; | |||
4858 | } | |||
4859 | ||||
4860 | int64_t Pow2MinusOne = (1ULL << Lg2) - 1; | |||
| ||||
4861 | unsigned AddReg = emitAdd_ri_(VT, Src0Reg, /*IsKill=*/false, Pow2MinusOne); | |||
4862 | if (!AddReg) | |||
4863 | return false; | |||
4864 | ||||
4865 | // (Src0 < 0) ? Pow2 - 1 : 0; | |||
4866 | if (!emitICmp_ri(VT, Src0Reg, /*IsKill=*/false, 0)) | |||
4867 | return false; | |||
4868 | ||||
4869 | unsigned SelectOpc; | |||
4870 | const TargetRegisterClass *RC; | |||
4871 | if (VT == MVT::i64) { | |||
4872 | SelectOpc = AArch64::CSELXr; | |||
4873 | RC = &AArch64::GPR64RegClass; | |||
4874 | } else { | |||
4875 | SelectOpc = AArch64::CSELWr; | |||
4876 | RC = &AArch64::GPR32RegClass; | |||
4877 | } | |||
4878 | unsigned SelectReg = | |||
4879 | fastEmitInst_rri(SelectOpc, RC, AddReg, /*IsKill=*/true, Src0Reg, | |||
4880 | Src0IsKill, AArch64CC::LT); | |||
4881 | if (!SelectReg) | |||
4882 | return false; | |||
4883 | ||||
4884 | // Divide by Pow2 --> ashr. If we're dividing by a negative value we must also | |||
4885 | // negate the result. | |||
4886 | unsigned ZeroReg = (VT == MVT::i64) ? AArch64::XZR : AArch64::WZR; | |||
4887 | unsigned ResultReg; | |||
4888 | if (C.isNegative()) | |||
4889 | ResultReg = emitAddSub_rs(/*UseAdd=*/false, VT, ZeroReg, /*IsKill=*/true, | |||
4890 | SelectReg, /*IsKill=*/true, AArch64_AM::ASR, Lg2); | |||
4891 | else | |||
4892 | ResultReg = emitASR_ri(VT, VT, SelectReg, /*IsKill=*/true, Lg2); | |||
4893 | ||||
4894 | if (!ResultReg) | |||
4895 | return false; | |||
4896 | ||||
4897 | updateValueMap(I, ResultReg); | |||
4898 | return true; | |||
4899 | } | |||
4900 | ||||
4901 | /// This is mostly a copy of the existing FastISel getRegForGEPIndex code. We | |||
4902 | /// have to duplicate it for AArch64, because otherwise we would fail during the | |||
4903 | /// sign-extend emission. | |||
4904 | std::pair<unsigned, bool> AArch64FastISel::getRegForGEPIndex(const Value *Idx) { | |||
4905 | unsigned IdxN = getRegForValue(Idx); | |||
4906 | if (IdxN == 0) | |||
4907 | // Unhandled operand. Halt "fast" selection and bail. | |||
4908 | return std::pair<unsigned, bool>(0, false); | |||
4909 | ||||
4910 | bool IdxNIsKill = hasTrivialKill(Idx); | |||
4911 | ||||
4912 | // If the index is smaller or larger than intptr_t, truncate or extend it. | |||
4913 | MVT PtrVT = TLI.getPointerTy(DL); | |||
4914 | EVT IdxVT = EVT::getEVT(Idx->getType(), /*HandleUnknown=*/false); | |||
4915 | if (IdxVT.bitsLT(PtrVT)) { | |||
4916 | IdxN = emitIntExt(IdxVT.getSimpleVT(), IdxN, PtrVT, /*IsZExt=*/false); | |||
4917 | IdxNIsKill = true; | |||
4918 | } else if (IdxVT.bitsGT(PtrVT)) | |||
4919 | llvm_unreachable("AArch64 FastISel doesn't support types larger than i64")::llvm::llvm_unreachable_internal("AArch64 FastISel doesn't support types larger than i64" , "/build/llvm-toolchain-snapshot-7~svn326246/lib/Target/AArch64/AArch64FastISel.cpp" , 4919); | |||
4920 | return std::pair<unsigned, bool>(IdxN, IdxNIsKill); | |||
4921 | } | |||
4922 | ||||
4923 | /// This is mostly a copy of the existing FastISel GEP code, but we have to | |||
4924 | /// duplicate it for AArch64, because otherwise we would bail out even for | |||
4925 | /// simple cases. This is because the standard fastEmit functions don't cover | |||
4926 | /// MUL at all and ADD is lowered very inefficientily. | |||
4927 | bool AArch64FastISel::selectGetElementPtr(const Instruction *I) { | |||
4928 | unsigned N = getRegForValue(I->getOperand(0)); | |||
4929 | if (!N) | |||
4930 | return false; | |||
4931 | bool NIsKill = hasTrivialKill(I->getOperand(0)); | |||
4932 | ||||
4933 | // Keep a running tab of the total offset to coalesce multiple N = N + Offset | |||
4934 | // into a single N = N + TotalOffset. | |||
4935 | uint64_t TotalOffs = 0; | |||
4936 | MVT VT = TLI.getPointerTy(DL); | |||
4937 | for (gep_type_iterator GTI = gep_type_begin(I), E = gep_type_end(I); | |||
4938 | GTI != E; ++GTI) { | |||
4939 | const Value *Idx = GTI.getOperand(); | |||
4940 | if (auto *StTy = GTI.getStructTypeOrNull()) { | |||
4941 | unsigned Field = cast<ConstantInt>(Idx)->getZExtValue(); | |||
4942 | // N = N + Offset | |||
4943 | if (Field) | |||
4944 | TotalOffs += DL.getStructLayout(StTy)->getElementOffset(Field); | |||
4945 | } else { | |||
4946 | Type *Ty = GTI.getIndexedType(); | |||
4947 | ||||
4948 | // If this is a constant subscript, handle it quickly. | |||
4949 | if (const auto *CI = dyn_cast<ConstantInt>(Idx)) { | |||
4950 | if (CI->isZero()) | |||
4951 | continue; | |||
4952 | // N = N + Offset | |||
4953 | TotalOffs += | |||
4954 | DL.getTypeAllocSize(Ty) * cast<ConstantInt>(CI)->getSExtValue(); | |||
4955 | continue; | |||
4956 | } | |||
4957 | if (TotalOffs) { | |||
4958 | N = emitAdd_ri_(VT, N, NIsKill, TotalOffs); | |||
4959 | if (!N) | |||
4960 | return false; | |||
4961 | NIsKill = true; | |||
4962 | TotalOffs = 0; | |||
4963 | } | |||
4964 | ||||
4965 | // N = N + Idx * ElementSize; | |||
4966 | uint64_t ElementSize = DL.getTypeAllocSize(Ty); | |||
4967 | std::pair<unsigned, bool> Pair = getRegForGEPIndex(Idx); | |||
4968 | unsigned IdxN = Pair.first; | |||
4969 | bool IdxNIsKill = Pair.second; | |||
4970 | if (!IdxN) | |||
4971 | return false; | |||
4972 | ||||
4973 | if (ElementSize != 1) { | |||
4974 | unsigned C = fastEmit_i(VT, VT, ISD::Constant, ElementSize); | |||
4975 | if (!C) | |||
4976 | return false; | |||
4977 | IdxN = emitMul_rr(VT, IdxN, IdxNIsKill, C, true); | |||
4978 | if (!IdxN) | |||
4979 | return false; | |||
4980 | IdxNIsKill = true; | |||
4981 | } | |||
4982 | N = fastEmit_rr(VT, VT, ISD::ADD, N, NIsKill, IdxN, IdxNIsKill); | |||
4983 | if (!N) | |||
4984 | return false; | |||
4985 | } | |||
4986 | } | |||
4987 | if (TotalOffs) { | |||
4988 | N = emitAdd_ri_(VT, N, NIsKill, TotalOffs); | |||
4989 | if (!N) | |||
4990 | return false; | |||
4991 | } | |||
4992 | updateValueMap(I, N); | |||
4993 | return true; | |||
4994 | } | |||
4995 | ||||
4996 | bool AArch64FastISel::selectAtomicCmpXchg(const AtomicCmpXchgInst *I) { | |||
4997 | assert(TM.getOptLevel() == CodeGenOpt::None &&(static_cast <bool> (TM.getOptLevel() == CodeGenOpt::None && "cmpxchg survived AtomicExpand at optlevel > -O0" ) ? void (0) : __assert_fail ("TM.getOptLevel() == CodeGenOpt::None && \"cmpxchg survived AtomicExpand at optlevel > -O0\"" , "/build/llvm-toolchain-snapshot-7~svn326246/lib/Target/AArch64/AArch64FastISel.cpp" , 4998, __extension__ __PRETTY_FUNCTION__)) | |||
4998 | "cmpxchg survived AtomicExpand at optlevel > -O0")(static_cast <bool> (TM.getOptLevel() == CodeGenOpt::None && "cmpxchg survived AtomicExpand at optlevel > -O0" ) ? void (0) : __assert_fail ("TM.getOptLevel() == CodeGenOpt::None && \"cmpxchg survived AtomicExpand at optlevel > -O0\"" , "/build/llvm-toolchain-snapshot-7~svn326246/lib/Target/AArch64/AArch64FastISel.cpp" , 4998, __extension__ __PRETTY_FUNCTION__)); | |||
4999 | ||||
5000 | auto *RetPairTy = cast<StructType>(I->getType()); | |||
5001 | Type *RetTy = RetPairTy->getTypeAtIndex(0U); | |||
5002 | assert(RetPairTy->getTypeAtIndex(1U)->isIntegerTy(1) &&(static_cast <bool> (RetPairTy->getTypeAtIndex(1U)-> isIntegerTy(1) && "cmpxchg has a non-i1 status result" ) ? void (0) : __assert_fail ("RetPairTy->getTypeAtIndex(1U)->isIntegerTy(1) && \"cmpxchg has a non-i1 status result\"" , "/build/llvm-toolchain-snapshot-7~svn326246/lib/Target/AArch64/AArch64FastISel.cpp" , 5003, __extension__ __PRETTY_FUNCTION__)) | |||
5003 | "cmpxchg has a non-i1 status result")(static_cast <bool> (RetPairTy->getTypeAtIndex(1U)-> isIntegerTy(1) && "cmpxchg has a non-i1 status result" ) ? void (0) : __assert_fail ("RetPairTy->getTypeAtIndex(1U)->isIntegerTy(1) && \"cmpxchg has a non-i1 status result\"" , "/build/llvm-toolchain-snapshot-7~svn326246/lib/Target/AArch64/AArch64FastISel.cpp" , 5003, __extension__ __PRETTY_FUNCTION__)); | |||
5004 | ||||
5005 | MVT VT; | |||
5006 | if (!isTypeLegal(RetTy, VT)) | |||
5007 | return false; | |||
5008 | ||||
5009 | const TargetRegisterClass *ResRC; | |||
5010 | unsigned Opc, CmpOpc; | |||
5011 | // This only supports i32/i64, because i8/i16 aren't legal, and the generic | |||
5012 | // extractvalue selection doesn't support that. | |||
5013 | if (VT == MVT::i32) { | |||
5014 | Opc = AArch64::CMP_SWAP_32; | |||
5015 | CmpOpc = AArch64::SUBSWrs; | |||
5016 | ResRC = &AArch64::GPR32RegClass; | |||
5017 | } else if (VT == MVT::i64) { | |||
5018 | Opc = AArch64::CMP_SWAP_64; | |||
5019 | CmpOpc = AArch64::SUBSXrs; | |||
5020 | ResRC = &AArch64::GPR64RegClass; | |||
5021 | } else { | |||
5022 | return false; | |||
5023 | } | |||
5024 | ||||
5025 | const MCInstrDesc &II = TII.get(Opc); | |||
5026 | ||||
5027 | const unsigned AddrReg = constrainOperandRegClass( | |||
5028 | II, getRegForValue(I->getPointerOperand()), II.getNumDefs()); | |||
5029 | const unsigned DesiredReg = constrainOperandRegClass( | |||
5030 | II, getRegForValue(I->getCompareOperand()), II.getNumDefs() + 1); | |||
5031 | const unsigned NewReg = constrainOperandRegClass( | |||
5032 | II, getRegForValue(I->getNewValOperand()), II.getNumDefs() + 2); | |||
5033 | ||||
5034 | const unsigned ResultReg1 = createResultReg(ResRC); | |||
5035 | const unsigned ResultReg2 = createResultReg(&AArch64::GPR32RegClass); | |||
5036 | const unsigned ScratchReg = createResultReg(&AArch64::GPR32RegClass); | |||
5037 | ||||
5038 | // FIXME: MachineMemOperand doesn't support cmpxchg yet. | |||
5039 | BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, II) | |||
5040 | .addDef(ResultReg1) | |||
5041 | .addDef(ScratchReg) | |||
5042 | .addUse(AddrReg) | |||
5043 | .addUse(DesiredReg) | |||
5044 | .addUse(NewReg); | |||
5045 | ||||
5046 | BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(CmpOpc)) | |||
5047 | .addDef(VT == MVT::i32 ? AArch64::WZR : AArch64::XZR) | |||
5048 | .addUse(ResultReg1) | |||
5049 | .addUse(DesiredReg) | |||
5050 | .addImm(0); | |||
5051 | ||||
5052 | BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(AArch64::CSINCWr)) | |||
5053 | .addDef(ResultReg2) | |||
5054 | .addUse(AArch64::WZR) | |||
5055 | .addUse(AArch64::WZR) | |||
5056 | .addImm(AArch64CC::NE); | |||
5057 | ||||
5058 | assert((ResultReg1 + 1) == ResultReg2 && "Nonconsecutive result registers.")(static_cast <bool> ((ResultReg1 + 1) == ResultReg2 && "Nonconsecutive result registers.") ? void (0) : __assert_fail ("(ResultReg1 + 1) == ResultReg2 && \"Nonconsecutive result registers.\"" , "/build/llvm-toolchain-snapshot-7~svn326246/lib/Target/AArch64/AArch64FastISel.cpp" , 5058, __extension__ __PRETTY_FUNCTION__)); | |||
5059 | updateValueMap(I, ResultReg1, 2); | |||
5060 | return true; | |||
5061 | } | |||
5062 | ||||
5063 | bool AArch64FastISel::fastSelectInstruction(const Instruction *I) { | |||
5064 | switch (I->getOpcode()) { | |||
5065 | default: | |||
5066 | break; | |||
5067 | case Instruction::Add: | |||
5068 | case Instruction::Sub: | |||
5069 | return selectAddSub(I); | |||
5070 | case Instruction::Mul: | |||
5071 | return selectMul(I); | |||
5072 | case Instruction::SDiv: | |||
5073 | return selectSDiv(I); | |||
5074 | case Instruction::SRem: | |||
5075 | if (!selectBinaryOp(I, ISD::SREM)) | |||
5076 | return selectRem(I, ISD::SREM); | |||
5077 | return true; | |||
5078 | case Instruction::URem: | |||
5079 | if (!selectBinaryOp(I, ISD::UREM)) | |||
5080 | return selectRem(I, ISD::UREM); | |||
5081 | return true; | |||
5082 | case Instruction::Shl: | |||
5083 | case Instruction::LShr: | |||
5084 | case Instruction::AShr: | |||
5085 | return selectShift(I); | |||
5086 | case Instruction::And: | |||
5087 | case Instruction::Or: | |||
5088 | case Instruction::Xor: | |||
5089 | return selectLogicalOp(I); | |||
5090 | case Instruction::Br: | |||
5091 | return selectBranch(I); | |||
5092 | case Instruction::IndirectBr: | |||
5093 | return selectIndirectBr(I); | |||
5094 | case Instruction::BitCast: | |||
5095 | if (!FastISel::selectBitCast(I)) | |||
5096 | return selectBitCast(I); | |||
5097 | return true; | |||
5098 | case Instruction::FPToSI: | |||
5099 | if (!selectCast(I, ISD::FP_TO_SINT)) | |||
5100 | return selectFPToInt(I, /*Signed=*/true); | |||
5101 | return true; | |||
5102 | case Instruction::FPToUI: | |||
5103 | return selectFPToInt(I, /*Signed=*/false); | |||
5104 | case Instruction::ZExt: | |||
5105 | case Instruction::SExt: | |||
5106 | return selectIntExt(I); | |||
5107 | case Instruction::Trunc: | |||
5108 | if (!selectCast(I, ISD::TRUNCATE)) | |||
5109 | return selectTrunc(I); | |||
5110 | return true; | |||
5111 | case Instruction::FPExt: | |||
5112 | return selectFPExt(I); | |||
5113 | case Instruction::FPTrunc: | |||
5114 | return selectFPTrunc(I); | |||
5115 | case Instruction::SIToFP: | |||
5116 | if (!selectCast(I, ISD::SINT_TO_FP)) | |||
5117 | return selectIntToFP(I, /*Signed=*/true); | |||
5118 | return true; | |||
5119 | case Instruction::UIToFP: | |||
5120 | return selectIntToFP(I, /*Signed=*/false); | |||
5121 | case Instruction::Load: | |||
5122 | return selectLoad(I); | |||
5123 | case Instruction::Store: | |||
5124 | return selectStore(I); | |||
5125 | case Instruction::FCmp: | |||
5126 | case Instruction::ICmp: | |||
5127 | return selectCmp(I); | |||
5128 | case Instruction::Select: | |||
5129 | return selectSelect(I); | |||
5130 | case Instruction::Ret: | |||
5131 | return selectRet(I); | |||
5132 | case Instruction::FRem: | |||
5133 | return selectFRem(I); | |||
5134 | case Instruction::GetElementPtr: | |||
5135 | return selectGetElementPtr(I); | |||
5136 | case Instruction::AtomicCmpXchg: | |||
5137 | return selectAtomicCmpXchg(cast<AtomicCmpXchgInst>(I)); | |||
5138 | } | |||
5139 | ||||
5140 | // Silence warnings. | |||
5141 | (void)&CC_AArch64_DarwinPCS_VarArg; | |||
5142 | (void)&CC_AArch64_Win64_VarArg; | |||
5143 | ||||
5144 | // fall-back to target-independent instruction selection. | |||
5145 | return selectOperator(I, I->getOpcode()); | |||
5146 | } | |||
5147 | ||||
5148 | namespace llvm { | |||
5149 | ||||
5150 | FastISel *AArch64::createFastISel(FunctionLoweringInfo &FuncInfo, | |||
5151 | const TargetLibraryInfo *LibInfo) { | |||
5152 | return new AArch64FastISel(FuncInfo, LibInfo); | |||
5153 | } | |||
5154 | ||||
5155 | } // end namespace llvm |