LLVM  13.0.0git
IntrinsicLowering.cpp
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1 //===-- IntrinsicLowering.cpp - Intrinsic Lowering default implementation -===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 //
9 // This file implements the IntrinsicLowering class.
10 //
11 //===----------------------------------------------------------------------===//
12 
13 #include "llvm/CodeGen/IntrinsicLowering.h"
14 #include "llvm/ADT/SmallVector.h"
15 #include "llvm/IR/Constants.h"
16 #include "llvm/IR/DataLayout.h"
17 #include "llvm/IR/DerivedTypes.h"
18 #include "llvm/IR/IRBuilder.h"
19 #include "llvm/IR/Module.h"
20 #include "llvm/IR/Type.h"
21 #include "llvm/Support/ErrorHandling.h"
22 #include "llvm/Support/raw_ostream.h"
23 using namespace llvm;
24 
25 /// This function is used when we want to lower an intrinsic call to a call of
26 /// an external function. This handles hard cases such as when there was already
27 /// a prototype for the external function, but that prototype doesn't match the
28 /// arguments we expect to pass in.
29 template <class ArgIt>
30 static CallInst *ReplaceCallWith(const char *NewFn, CallInst *CI,
31  ArgIt ArgBegin, ArgIt ArgEnd,
32  Type *RetTy) {
33  // If we haven't already looked up this function, check to see if the
34  // program already contains a function with this name.
35  Module *M = CI->getModule();
36  // Get or insert the definition now.
37  std::vector<Type *> ParamTys;
38  for (ArgIt I = ArgBegin; I != ArgEnd; ++I)
39  ParamTys.push_back((*I)->getType());
40  FunctionCallee FCache =
41  M->getOrInsertFunction(NewFn, FunctionType::get(RetTy, ParamTys, false));
42 
43  IRBuilder<> Builder(CI->getParent(), CI->getIterator());
44  SmallVector<Value *, 8> Args(ArgBegin, ArgEnd);
45  CallInst *NewCI = Builder.CreateCall(FCache, Args);
46  NewCI->setName(CI->getName());
47  if (!CI->use_empty())
48  CI->replaceAllUsesWith(NewCI);
49  return NewCI;
50 }
51 
52 /// Emit the code to lower bswap of V before the specified instruction IP.
53 static Value *LowerBSWAP(LLVMContext &Context, Value *V, Instruction *IP) {
54  assert(V->getType()->isIntOrIntVectorTy() && "Can't bswap a non-integer type!");
55 
56  unsigned BitSize = V->getType()->getScalarSizeInBits();
57 
58  IRBuilder<> Builder(IP);
59 
60  switch(BitSize) {
61  default: llvm_unreachable("Unhandled type size of value to byteswap!");
62  case 16: {
63  Value *Tmp1 = Builder.CreateShl(V, ConstantInt::get(V->getType(), 8),
64  "bswap.2");
65  Value *Tmp2 = Builder.CreateLShr(V, ConstantInt::get(V->getType(), 8),
66  "bswap.1");
67  V = Builder.CreateOr(Tmp1, Tmp2, "bswap.i16");
68  break;
69  }
70  case 32: {
71  Value *Tmp4 = Builder.CreateShl(V, ConstantInt::get(V->getType(), 24),
72  "bswap.4");
73  Value *Tmp3 = Builder.CreateShl(V, ConstantInt::get(V->getType(), 8),
74  "bswap.3");
75  Value *Tmp2 = Builder.CreateLShr(V, ConstantInt::get(V->getType(), 8),
76  "bswap.2");
77  Value *Tmp1 = Builder.CreateLShr(V,ConstantInt::get(V->getType(), 24),
78  "bswap.1");
79  Tmp3 = Builder.CreateAnd(Tmp3,
80  ConstantInt::get(V->getType(), 0xFF0000),
81  "bswap.and3");
82  Tmp2 = Builder.CreateAnd(Tmp2,
83  ConstantInt::get(V->getType(), 0xFF00),
84  "bswap.and2");
85  Tmp4 = Builder.CreateOr(Tmp4, Tmp3, "bswap.or1");
86  Tmp2 = Builder.CreateOr(Tmp2, Tmp1, "bswap.or2");
87  V = Builder.CreateOr(Tmp4, Tmp2, "bswap.i32");
88  break;
89  }
90  case 64: {
91  Value *Tmp8 = Builder.CreateShl(V, ConstantInt::get(V->getType(), 56),
92  "bswap.8");
93  Value *Tmp7 = Builder.CreateShl(V, ConstantInt::get(V->getType(), 40),
94  "bswap.7");
95  Value *Tmp6 = Builder.CreateShl(V, ConstantInt::get(V->getType(), 24),
96  "bswap.6");
97  Value *Tmp5 = Builder.CreateShl(V, ConstantInt::get(V->getType(), 8),
98  "bswap.5");
99  Value* Tmp4 = Builder.CreateLShr(V, ConstantInt::get(V->getType(), 8),
100  "bswap.4");
101  Value* Tmp3 = Builder.CreateLShr(V,
102  ConstantInt::get(V->getType(), 24),
103  "bswap.3");
104  Value* Tmp2 = Builder.CreateLShr(V,
105  ConstantInt::get(V->getType(), 40),
106  "bswap.2");
107  Value* Tmp1 = Builder.CreateLShr(V,
108  ConstantInt::get(V->getType(), 56),
109  "bswap.1");
110  Tmp7 = Builder.CreateAnd(Tmp7,
111  ConstantInt::get(V->getType(),
112  0xFF000000000000ULL),
113  "bswap.and7");
114  Tmp6 = Builder.CreateAnd(Tmp6,
115  ConstantInt::get(V->getType(),
116  0xFF0000000000ULL),
117  "bswap.and6");
118  Tmp5 = Builder.CreateAnd(Tmp5,
119  ConstantInt::get(V->getType(),
120  0xFF00000000ULL),
121  "bswap.and5");
122  Tmp4 = Builder.CreateAnd(Tmp4,
123  ConstantInt::get(V->getType(),
124  0xFF000000ULL),
125  "bswap.and4");
126  Tmp3 = Builder.CreateAnd(Tmp3,
127  ConstantInt::get(V->getType(),
128  0xFF0000ULL),
129  "bswap.and3");
130  Tmp2 = Builder.CreateAnd(Tmp2,
131  ConstantInt::get(V->getType(),
132  0xFF00ULL),
133  "bswap.and2");
134  Tmp8 = Builder.CreateOr(Tmp8, Tmp7, "bswap.or1");
135  Tmp6 = Builder.CreateOr(Tmp6, Tmp5, "bswap.or2");
136  Tmp4 = Builder.CreateOr(Tmp4, Tmp3, "bswap.or3");
137  Tmp2 = Builder.CreateOr(Tmp2, Tmp1, "bswap.or4");
138  Tmp8 = Builder.CreateOr(Tmp8, Tmp6, "bswap.or5");
139  Tmp4 = Builder.CreateOr(Tmp4, Tmp2, "bswap.or6");
140  V = Builder.CreateOr(Tmp8, Tmp4, "bswap.i64");
141  break;
142  }
143  }
144  return V;
145 }
146 
147 /// Emit the code to lower ctpop of V before the specified instruction IP.
148 static Value *LowerCTPOP(LLVMContext &Context, Value *V, Instruction *IP) {
149  assert(V->getType()->isIntegerTy() && "Can't ctpop a non-integer type!");
150 
151  static const uint64_t MaskValues[6] = {
152  0x5555555555555555ULL, 0x3333333333333333ULL,
153  0x0F0F0F0F0F0F0F0FULL, 0x00FF00FF00FF00FFULL,
154  0x0000FFFF0000FFFFULL, 0x00000000FFFFFFFFULL
155  };
156 
157  IRBuilder<> Builder(IP);
158 
159  unsigned BitSize = V->getType()->getPrimitiveSizeInBits();
160  unsigned WordSize = (BitSize + 63) / 64;
161  Value *Count = ConstantInt::get(V->getType(), 0);
162 
163  for (unsigned n = 0; n < WordSize; ++n) {
164  Value *PartValue = V;
165  for (unsigned i = 1, ct = 0; i < (BitSize>64 ? 64 : BitSize);
166  i <<= 1, ++ct) {
167  Value *MaskCst = ConstantInt::get(V->getType(), MaskValues[ct]);
168  Value *LHS = Builder.CreateAnd(PartValue, MaskCst, "cppop.and1");
169  Value *VShift = Builder.CreateLShr(PartValue,
170  ConstantInt::get(V->getType(), i),
171  "ctpop.sh");
172  Value *RHS = Builder.CreateAnd(VShift, MaskCst, "cppop.and2");
173  PartValue = Builder.CreateAdd(LHS, RHS, "ctpop.step");
174  }
175  Count = Builder.CreateAdd(PartValue, Count, "ctpop.part");
176  if (BitSize > 64) {
177  V = Builder.CreateLShr(V, ConstantInt::get(V->getType(), 64),
178  "ctpop.part.sh");
179  BitSize -= 64;
180  }
181  }
182 
183  return Count;
184 }
185 
186 /// Emit the code to lower ctlz of V before the specified instruction IP.
187 static Value *LowerCTLZ(LLVMContext &Context, Value *V, Instruction *IP) {
188 
189  IRBuilder<> Builder(IP);
190 
191  unsigned BitSize = V->getType()->getPrimitiveSizeInBits();
192  for (unsigned i = 1; i < BitSize; i <<= 1) {
193  Value *ShVal = ConstantInt::get(V->getType(), i);
194  ShVal = Builder.CreateLShr(V, ShVal, "ctlz.sh");
195  V = Builder.CreateOr(V, ShVal, "ctlz.step");
196  }
197 
198  V = Builder.CreateNot(V);
199  return LowerCTPOP(Context, V, IP);
200 }
201 
202 static void ReplaceFPIntrinsicWithCall(CallInst *CI, const char *Fname,
203  const char *Dname,
204  const char *LDname) {
205  switch (CI->getArgOperand(0)->getType()->getTypeID()) {
206  default: llvm_unreachable("Invalid type in intrinsic");
207  case Type::FloatTyID:
208  ReplaceCallWith(Fname, CI, CI->arg_begin(), CI->arg_end(),
209  Type::getFloatTy(CI->getContext()));
210  break;
211  case Type::DoubleTyID:
212  ReplaceCallWith(Dname, CI, CI->arg_begin(), CI->arg_end(),
213  Type::getDoubleTy(CI->getContext()));
214  break;
215  case Type::X86_FP80TyID:
216  case Type::FP128TyID:
217  case Type::PPC_FP128TyID:
218  ReplaceCallWith(LDname, CI, CI->arg_begin(), CI->arg_end(),
219  CI->getArgOperand(0)->getType());
220  break;
221  }
222 }
223 
224 void IntrinsicLowering::LowerIntrinsicCall(CallInst *CI) {
225  IRBuilder<> Builder(CI);
226  LLVMContext &Context = CI->getContext();
227 
228  const Function *Callee = CI->getCalledFunction();
229  assert(Callee && "Cannot lower an indirect call!");
230 
231  switch (Callee->getIntrinsicID()) {
232  case Intrinsic::not_intrinsic:
233  report_fatal_error("Cannot lower a call to a non-intrinsic function '"+
234  Callee->getName() + "'!");
235  default:
236  report_fatal_error("Code generator does not support intrinsic function '"+
237  Callee->getName()+"'!");
238 
239  case Intrinsic::expect: {
240  // Just replace __builtin_expect(exp, c) with EXP.
241  Value *V = CI->getArgOperand(0);
242  CI->replaceAllUsesWith(V);
243  break;
244  }
245 
246  case Intrinsic::ctpop:
247  CI->replaceAllUsesWith(LowerCTPOP(Context, CI->getArgOperand(0), CI));
248  break;
249 
250  case Intrinsic::bswap:
251  CI->replaceAllUsesWith(LowerBSWAP(Context, CI->getArgOperand(0), CI));
252  break;
253 
254  case Intrinsic::ctlz:
255  CI->replaceAllUsesWith(LowerCTLZ(Context, CI->getArgOperand(0), CI));
256  break;
257 
258  case Intrinsic::cttz: {
259  // cttz(x) -> ctpop(~X & (X-1))
260  Value *Src = CI->getArgOperand(0);
261  Value *NotSrc = Builder.CreateNot(Src);
262  NotSrc->setName(Src->getName() + ".not");
263  Value *SrcM1 = ConstantInt::get(Src->getType(), 1);
264  SrcM1 = Builder.CreateSub(Src, SrcM1);
265  Src = LowerCTPOP(Context, Builder.CreateAnd(NotSrc, SrcM1), CI);
266  CI->replaceAllUsesWith(Src);
267  break;
268  }
269 
270  case Intrinsic::stacksave:
271  case Intrinsic::stackrestore: {
272  if (!Warned)
273  errs() << "WARNING: this target does not support the llvm.stack"
274  << (Callee->getIntrinsicID() == Intrinsic::stacksave ?
275  "save" : "restore") << " intrinsic.\n";
276  Warned = true;
277  if (Callee->getIntrinsicID() == Intrinsic::stacksave)
278  CI->replaceAllUsesWith(Constant::getNullValue(CI->getType()));
279  break;
280  }
281 
282  case Intrinsic::get_dynamic_area_offset:
283  errs() << "WARNING: this target does not support the custom llvm.get."
284  "dynamic.area.offset. It is being lowered to a constant 0\n";
285  // Just lower it to a constant 0 because for most targets
286  // @llvm.get.dynamic.area.offset is lowered to zero.
287  CI->replaceAllUsesWith(ConstantInt::get(CI->getType(), 0));
288  break;
289  case Intrinsic::returnaddress:
290  case Intrinsic::frameaddress:
291  errs() << "WARNING: this target does not support the llvm."
292  << (Callee->getIntrinsicID() == Intrinsic::returnaddress ?
293  "return" : "frame") << "address intrinsic.\n";
294  CI->replaceAllUsesWith(
295  ConstantPointerNull::get(cast<PointerType>(CI->getType())));
296  break;
297  case Intrinsic::addressofreturnaddress:
298  errs() << "WARNING: this target does not support the "
299  "llvm.addressofreturnaddress intrinsic.\n";
300  CI->replaceAllUsesWith(
301  ConstantPointerNull::get(cast<PointerType>(CI->getType())));
302  break;
303 
304  case Intrinsic::prefetch:
305  break; // Simply strip out prefetches on unsupported architectures
306 
307  case Intrinsic::pcmarker:
308  break; // Simply strip out pcmarker on unsupported architectures
309  case Intrinsic::readcyclecounter: {
310  errs() << "WARNING: this target does not support the llvm.readcyclecoun"
311  << "ter intrinsic. It is being lowered to a constant 0\n";
312  CI->replaceAllUsesWith(ConstantInt::get(Type::getInt64Ty(Context), 0));
313  break;
314  }
315 
316  case Intrinsic::dbg_declare:
317  case Intrinsic::dbg_label:
318  break; // Simply strip out debugging intrinsics
319 
320  case Intrinsic::eh_typeid_for:
321  // Return something different to eh_selector.
322  CI->replaceAllUsesWith(ConstantInt::get(CI->getType(), 1));
323  break;
324 
325  case Intrinsic::annotation:
326  case Intrinsic::ptr_annotation:
327  // Just drop the annotation, but forward the value
328  CI->replaceAllUsesWith(CI->getOperand(0));
329  break;
330 
331  case Intrinsic::assume:
332  case Intrinsic::experimental_noalias_scope_decl:
333  case Intrinsic::var_annotation:
334  break; // Strip out these intrinsics
335 
336  case Intrinsic::memcpy: {
337  Type *IntPtr = DL.getIntPtrType(Context);
338  Value *Size = Builder.CreateIntCast(CI->getArgOperand(2), IntPtr,
339  /* isSigned */ false);
340  Value *Ops[3];
341  Ops[0] = CI->getArgOperand(0);
342  Ops[1] = CI->getArgOperand(1);
343  Ops[2] = Size;
344  ReplaceCallWith("memcpy", CI, Ops, Ops+3, CI->getArgOperand(0)->getType());
345  break;
346  }
347  case Intrinsic::memmove: {
348  Type *IntPtr = DL.getIntPtrType(Context);
349  Value *Size = Builder.CreateIntCast(CI->getArgOperand(2), IntPtr,
350  /* isSigned */ false);
351  Value *Ops[3];
352  Ops[0] = CI->getArgOperand(0);
353  Ops[1] = CI->getArgOperand(1);
354  Ops[2] = Size;
355  ReplaceCallWith("memmove", CI, Ops, Ops+3, CI->getArgOperand(0)->getType());
356  break;
357  }
358  case Intrinsic::memset: {
359  Value *Op0 = CI->getArgOperand(0);
360  Type *IntPtr = DL.getIntPtrType(Op0->getType());
361  Value *Size = Builder.CreateIntCast(CI->getArgOperand(2), IntPtr,
362  /* isSigned */ false);
363  Value *Ops[3];
364  Ops[0] = Op0;
365  // Extend the amount to i32.
366  Ops[1] = Builder.CreateIntCast(CI->getArgOperand(1),
367  Type::getInt32Ty(Context),
368  /* isSigned */ false);
369  Ops[2] = Size;
370  ReplaceCallWith("memset", CI, Ops, Ops+3, CI->getArgOperand(0)->getType());
371  break;
372  }
373  case Intrinsic::sqrt: {
374  ReplaceFPIntrinsicWithCall(CI, "sqrtf", "sqrt", "sqrtl");
375  break;
376  }
377  case Intrinsic::log: {
378  ReplaceFPIntrinsicWithCall(CI, "logf", "log", "logl");
379  break;
380  }
381  case Intrinsic::log2: {
382  ReplaceFPIntrinsicWithCall(CI, "log2f", "log2", "log2l");
383  break;
384  }
385  case Intrinsic::log10: {
386  ReplaceFPIntrinsicWithCall(CI, "log10f", "log10", "log10l");
387  break;
388  }
389  case Intrinsic::exp: {
390  ReplaceFPIntrinsicWithCall(CI, "expf", "exp", "expl");
391  break;
392  }
393  case Intrinsic::exp2: {
394  ReplaceFPIntrinsicWithCall(CI, "exp2f", "exp2", "exp2l");
395  break;
396  }
397  case Intrinsic::pow: {
398  ReplaceFPIntrinsicWithCall(CI, "powf", "pow", "powl");
399  break;
400  }
401  case Intrinsic::sin: {
402  ReplaceFPIntrinsicWithCall(CI, "sinf", "sin", "sinl");
403  break;
404  }
405  case Intrinsic::cos: {
406  ReplaceFPIntrinsicWithCall(CI, "cosf", "cos", "cosl");
407  break;
408  }
409  case Intrinsic::floor: {
410  ReplaceFPIntrinsicWithCall(CI, "floorf", "floor", "floorl");
411  break;
412  }
413  case Intrinsic::ceil: {
414  ReplaceFPIntrinsicWithCall(CI, "ceilf", "ceil", "ceill");
415  break;
416  }
417  case Intrinsic::trunc: {
418  ReplaceFPIntrinsicWithCall(CI, "truncf", "trunc", "truncl");
419  break;
420  }
421  case Intrinsic::round: {
422  ReplaceFPIntrinsicWithCall(CI, "roundf", "round", "roundl");
423  break;
424  }
425  case Intrinsic::roundeven: {
426  ReplaceFPIntrinsicWithCall(CI, "roundevenf", "roundeven", "roundevenl");
427  break;
428  }
429  case Intrinsic::copysign: {
430  ReplaceFPIntrinsicWithCall(CI, "copysignf", "copysign", "copysignl");
431  break;
432  }
433  case Intrinsic::flt_rounds:
434  // Lower to "round to the nearest"
435  if (!CI->getType()->isVoidTy())
436  CI->replaceAllUsesWith(ConstantInt::get(CI->getType(), 1));
437  break;
438  case Intrinsic::invariant_start:
439  case Intrinsic::lifetime_start:
440  // Discard region information.
441  CI->replaceAllUsesWith(UndefValue::get(CI->getType()));
442  break;
443  case Intrinsic::invariant_end:
444  case Intrinsic::lifetime_end:
445  // Discard region information.
446  break;
447  }
448 
449  assert(CI->use_empty() &&
450  "Lowering should have eliminated any uses of the intrinsic call!");
451  CI->eraseFromParent();
452 }
453 
454 bool IntrinsicLowering::LowerToByteSwap(CallInst *CI) {
455  // Verify this is a simple bswap.
456  if (CI->getNumArgOperands() != 1 ||
457  CI->getType() != CI->getArgOperand(0)->getType() ||
458  !CI->getType()->isIntegerTy())
459  return false;
460 
461  IntegerType *Ty = dyn_cast<IntegerType>(CI->getType());
462  if (!Ty)
463  return false;
464 
465  // Okay, we can do this xform, do so now.
466  Module *M = CI->getModule();
467  Function *Int = Intrinsic::getDeclaration(M, Intrinsic::bswap, Ty);
468 
469  Value *Op = CI->getArgOperand(0);
470  Op = CallInst::Create(Int, Op, CI->getName(), CI);
471 
472  CI->replaceAllUsesWith(Op);
473  CI->eraseFromParent();
474  return true;
475 }
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M
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We have fiadd patterns now but the followings have the same cost and complexity We need a way to specify the later is more profitable def def The FP stackifier should handle simple permutates to reduce number of shuffle e g ceil
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Definition: Function.h:61
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Definition: IntrinsicLowering.cpp:148
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ErrorHandling.h
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We have fiadd patterns now but the followings have the same cost and complexity We need a way to specify the later is more profitable def def The FP stackifier should handle simple permutates to reduce number of shuffle e g floor
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llvm::Value::use_empty
bool use_empty() const
Definition: Value.h:347
Type.h
LowerCTLZ
static Value * LowerCTLZ(LLVMContext &Context, Value *V, Instruction *IP)
Emit the code to lower ctlz of V before the specified instruction IP.
Definition: IntrinsicLowering.cpp:187
llvm::Type::isIntegerTy
bool isIntegerTy() const
True if this is an instance of IntegerType.
Definition: Type.h:202
llvm::Instruction::eraseFromParent
SymbolTableList< Instruction >::iterator eraseFromParent()
This method unlinks 'this' from the containing basic block and deletes it.
Definition: Instruction.cpp:77
llvm::ConstantPointerNull::get
static ConstantPointerNull * get(PointerType *T)
Static factory methods - Return objects of the specified value.
Definition: Constants.cpp:1737
llvm::LLVMContext
This is an important class for using LLVM in a threaded context.
Definition: LLVMContext.h:68
I
#define I(x, y, z)
Definition: MD5.cpp:59
ReplaceCallWith
static CallInst * ReplaceCallWith(const char *NewFn, CallInst *CI, ArgIt ArgBegin, ArgIt ArgEnd, Type *RetTy)
This function is used when we want to lower an intrinsic call to a call of an external function.
Definition: IntrinsicLowering.cpp:30
IRBuilder.h
assert
assert(ImpDefSCC.getReg()==AMDGPU::SCC &&ImpDefSCC.isDef())
memcpy
<%struct.s * > cast struct s *S to sbyte *< sbyte * > sbyte uint cast struct s *agg result to sbyte *< sbyte * > sbyte uint cast struct s *memtmp to sbyte *< sbyte * > sbyte uint ret void llc ends up issuing two memcpy or custom lower memcpy(of small size) to be ldmia/stmia. I think option 2 is better but the current register allocator cannot allocate a chunk of registers at a time. A feasible temporary solution is to use specific physical registers at the lowering time for small(<
llvm::Type::isVoidTy
bool isVoidTy() const
Return true if this is 'void'.
Definition: Type.h:139
llvm::Module
A Module instance is used to store all the information related to an LLVM module.
Definition: Module.h:67
llvm::CallBase::arg_end
User::op_iterator arg_end()
Return the iterator pointing to the end of the argument list.
Definition: InstrTypes.h:1312
Builder
assume Assume Builder
Definition: AssumeBundleBuilder.cpp:643
llvm::Type::FP128TyID
@ FP128TyID
128-bit floating point type (112-bit significand)
Definition: Type.h:62
prefetch
loop data prefetch
Definition: LoopDataPrefetch.cpp:146
DataLayout.h
llvm::Type::PPC_FP128TyID
@ PPC_FP128TyID
128-bit floating point type (two 64-bits, PowerPC)
Definition: Type.h:63
llvm_unreachable
#define llvm_unreachable(msg)
Marks that the current location is not supposed to be reachable.
Definition: ErrorHandling.h:136
llvm::Value::getType
Type * getType() const
All values are typed, get the type of this value.
Definition: Value.h:246
llvm::Value::replaceAllUsesWith
void replaceAllUsesWith(Value *V)
Change all uses of this to point to a new Value.
Definition: Value.cpp:523
llvm::Value::getContext
LLVMContext & getContext() const
All values hold a context through their type.
Definition: Value.cpp:871
llvm::ilist_node_impl::getIterator
self_iterator getIterator()
Definition: ilist_node.h:81
trunc
We have fiadd patterns now but the followings have the same cost and complexity We need a way to specify the later is more profitable def def The FP stackifier should handle simple permutates to reduce number of shuffle e g trunc
Definition: README-FPStack.txt:63
llvm::Value::getName
StringRef getName() const
Return a constant reference to the value's name.
Definition: Value.cpp:295
Callee
amdgpu Simplify well known AMD library false FunctionCallee Callee
Definition: AMDGPULibCalls.cpp:205
llvm::DataLayout::getIntPtrType
IntegerType * getIntPtrType(LLVMContext &C, unsigned AddressSpace=0) const
Returns an integer type with size at least as big as that of a pointer in the given address space.
Definition: DataLayout.cpp:839
llvm::Type::getInt64Ty
static IntegerType * getInt64Ty(LLVMContext &C)
Definition: Type.cpp:198
llvm::Constant::getNullValue
static Constant * getNullValue(Type *Ty)
Constructor to create a '0' constant of arbitrary type.
Definition: Constants.cpp:347
llvm::AMDGPU::SendMsg::Op
Op
Definition: SIDefines.h:302
llvm::Type::isIntOrIntVectorTy
bool isIntOrIntVectorTy() const
Return true if this is an integer type or a vector of integer types.
Definition: Type.h:208
llvm::log2
static double log2(double V)
Definition: AMDGPULibCalls.cpp:841
LowerBSWAP
static Value * LowerBSWAP(LLVMContext &Context, Value *V, Instruction *IP)
Emit the code to lower bswap of V before the specified instruction IP.
Definition: IntrinsicLowering.cpp:53
SmallVector.h
llvm::CallBase::getArgOperand
Value * getArgOperand(unsigned i) const
Definition: InstrTypes.h:1341
llvm::Instruction::getParent
const BasicBlock * getParent() const
Definition: Instruction.h:94
llvm::FunctionCallee
A handy container for a FunctionType+Callee-pointer pair, which can be passed around as a single enti...
Definition: DerivedTypes.h:164
DerivedTypes.h
llvm::CallInst
This class represents a function call, abstracting a target machine's calling convention.
Definition: Instructions.h:1450
llvm::AMDGPU::HSAMD::Kernel::Key::Args
constexpr char Args[]
Key for Kernel::Metadata::mArgs.
Definition: AMDGPUMetadata.h:379
llvm::User::getOperand
Value * getOperand(unsigned i) const
Definition: User.h:169
raw_ostream.h
n
The same transformation can work with an even modulo with the addition of a and shrink the compare RHS by the same amount Unless the target supports that transformation probably isn t worthwhile The transformation can also easily be made to work with non zero equality for n
Definition: README.txt:685
llvm::IntrinsicLowering::LowerIntrinsicCall
void LowerIntrinsicCall(CallInst *CI)
Replace a call to the specified intrinsic function.
Definition: IntrinsicLowering.cpp:224
llvm::Value
LLVM Value Representation.
Definition: Value.h:75
llvm::Type::X86_FP80TyID
@ X86_FP80TyID
80-bit floating point type (X87)
Definition: Type.h:61
llvm::Type::getFloatTy
static Type * getFloatTy(LLVMContext &C)
Definition: Type.cpp:184
llvm::Type::getPrimitiveSizeInBits
TypeSize getPrimitiveSizeInBits() const LLVM_READONLY
Return the basic size of this type if it is a primitive type.
Definition: Type.cpp:122
ReplaceFPIntrinsicWithCall
static void ReplaceFPIntrinsicWithCall(CallInst *CI, const char *Fname, const char *Dname, const char *LDname)
Definition: IntrinsicLowering.cpp:202
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