1 //===-- AutoUpgrade.cpp - Implement auto-upgrade helper functions ---------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file implements the auto-upgrade helper functions
12 //===----------------------------------------------------------------------===//
14 #include "llvm/AutoUpgrade.h"
15 #include "llvm/Constants.h"
16 #include "llvm/Function.h"
17 #include "llvm/LLVMContext.h"
18 #include "llvm/Module.h"
19 #include "llvm/IntrinsicInst.h"
20 #include "llvm/ADT/SmallVector.h"
21 #include "llvm/Support/CallSite.h"
22 #include "llvm/Support/ErrorHandling.h"
23 #include "llvm/Support/IRBuilder.h"
28 static bool UpgradeIntrinsicFunction1(Function *F, Function *&NewFn) {
29 assert(F && "Illegal to upgrade a non-existent Function.");
31 // Get the Function's name.
32 const std::string& Name = F->getName();
35 const FunctionType *FTy = F->getFunctionType();
37 // Quickly eliminate it, if it's not a candidate.
38 if (Name.length() <= 8 || Name[0] != 'l' || Name[1] != 'l' ||
39 Name[2] != 'v' || Name[3] != 'm' || Name[4] != '.')
42 Module *M = F->getParent();
46 // This upgrades the llvm.atomic.lcs, llvm.atomic.las, llvm.atomic.lss,
47 // and atomics with default address spaces to their new names to their new
48 // function name (e.g. llvm.atomic.add.i32 => llvm.atomic.add.i32.p0i32)
49 if (Name.compare(5,7,"atomic.",7) == 0) {
50 if (Name.compare(12,3,"lcs",3) == 0) {
51 std::string::size_type delim = Name.find('.',12);
52 F->setName("llvm.atomic.cmp.swap" + Name.substr(delim) +
53 ".p0" + Name.substr(delim+1));
57 else if (Name.compare(12,3,"las",3) == 0) {
58 std::string::size_type delim = Name.find('.',12);
59 F->setName("llvm.atomic.load.add"+Name.substr(delim)
60 + ".p0" + Name.substr(delim+1));
64 else if (Name.compare(12,3,"lss",3) == 0) {
65 std::string::size_type delim = Name.find('.',12);
66 F->setName("llvm.atomic.load.sub"+Name.substr(delim)
67 + ".p0" + Name.substr(delim+1));
71 else if (Name.rfind(".p") == std::string::npos) {
72 // We don't have an address space qualifier so this has be upgraded
73 // to the new name. Copy the type name at the end of the intrinsic
75 std::string::size_type delim = Name.find_last_of('.');
76 assert(delim != std::string::npos && "can not find type");
77 F->setName(Name + ".p0" + Name.substr(delim+1));
81 } else if (Name.compare(5, 9, "arm.neon.", 9) == 0) {
82 if (Name.compare(14, 7, "vmovls.", 7) == 0 ||
83 Name.compare(14, 7, "vmovlu.", 7) == 0) {
84 // Calls to these are transformed into IR without intrinsics.
91 // This upgrades the name of the llvm.bswap intrinsic function to only use
92 // a single type name for overloading. We only care about the old format
93 // 'llvm.bswap.i*.i*', so check for 'bswap.' and then for there being
94 // a '.' after 'bswap.'
95 if (Name.compare(5,6,"bswap.",6) == 0) {
96 std::string::size_type delim = Name.find('.',11);
98 if (delim != std::string::npos) {
99 // Construct the new name as 'llvm.bswap' + '.i*'
100 F->setName(Name.substr(0,10)+Name.substr(delim));
108 // We only want to fix the 'llvm.ct*' intrinsics which do not have the
109 // correct return type, so we check for the name, and then check if the
110 // return type does not match the parameter type.
111 if ( (Name.compare(5,5,"ctpop",5) == 0 ||
112 Name.compare(5,4,"ctlz",4) == 0 ||
113 Name.compare(5,4,"cttz",4) == 0) &&
114 FTy->getReturnType() != FTy->getParamType(0)) {
115 // We first need to change the name of the old (bad) intrinsic, because
116 // its type is incorrect, but we cannot overload that name. We
117 // arbitrarily unique it here allowing us to construct a correctly named
118 // and typed function below.
121 // Now construct the new intrinsic with the correct name and type. We
122 // leave the old function around in order to query its type, whatever it
123 // may be, and correctly convert up to the new type.
124 NewFn = cast<Function>(M->getOrInsertFunction(Name,
125 FTy->getParamType(0),
126 FTy->getParamType(0),
133 // The old llvm.eh.selector.i32 is equivalent to the new llvm.eh.selector.
134 if (Name.compare("llvm.eh.selector.i32") == 0) {
135 F->setName("llvm.eh.selector");
139 // The old llvm.eh.typeid.for.i32 is equivalent to llvm.eh.typeid.for.
140 if (Name.compare("llvm.eh.typeid.for.i32") == 0) {
141 F->setName("llvm.eh.typeid.for");
145 // Convert the old llvm.eh.selector.i64 to a call to llvm.eh.selector.
146 if (Name.compare("llvm.eh.selector.i64") == 0) {
147 NewFn = Intrinsic::getDeclaration(M, Intrinsic::eh_selector);
150 // Convert the old llvm.eh.typeid.for.i64 to a call to llvm.eh.typeid.for.
151 if (Name.compare("llvm.eh.typeid.for.i64") == 0) {
152 NewFn = Intrinsic::getDeclaration(M, Intrinsic::eh_typeid_for);
158 // This upgrades the llvm.memcpy, llvm.memmove, and llvm.memset to the
159 // new format that allows overloading the pointer for different address
160 // space (e.g., llvm.memcpy.i16 => llvm.memcpy.p0i8.p0i8.i16)
161 const char* NewFnName = NULL;
162 if (Name.compare(5,8,"memcpy.i",8) == 0) {
164 NewFnName = "llvm.memcpy.p0i8.p0i8.i8";
165 else if (Name.compare(13,2,"16") == 0)
166 NewFnName = "llvm.memcpy.p0i8.p0i8.i16";
167 else if (Name.compare(13,2,"32") == 0)
168 NewFnName = "llvm.memcpy.p0i8.p0i8.i32";
169 else if (Name.compare(13,2,"64") == 0)
170 NewFnName = "llvm.memcpy.p0i8.p0i8.i64";
171 } else if (Name.compare(5,9,"memmove.i",9) == 0) {
173 NewFnName = "llvm.memmove.p0i8.p0i8.i8";
174 else if (Name.compare(14,2,"16") == 0)
175 NewFnName = "llvm.memmove.p0i8.p0i8.i16";
176 else if (Name.compare(14,2,"32") == 0)
177 NewFnName = "llvm.memmove.p0i8.p0i8.i32";
178 else if (Name.compare(14,2,"64") == 0)
179 NewFnName = "llvm.memmove.p0i8.p0i8.i64";
181 else if (Name.compare(5,8,"memset.i",8) == 0) {
183 NewFnName = "llvm.memset.p0i8.i8";
184 else if (Name.compare(13,2,"16") == 0)
185 NewFnName = "llvm.memset.p0i8.i16";
186 else if (Name.compare(13,2,"32") == 0)
187 NewFnName = "llvm.memset.p0i8.i32";
188 else if (Name.compare(13,2,"64") == 0)
189 NewFnName = "llvm.memset.p0i8.i64";
192 const FunctionType *FTy = F->getFunctionType();
193 NewFn = cast<Function>(M->getOrInsertFunction(NewFnName,
194 FTy->getReturnType(),
195 FTy->getParamType(0),
196 FTy->getParamType(1),
197 FTy->getParamType(2),
198 FTy->getParamType(3),
199 Type::getInt1Ty(F->getContext()),
206 // This upgrades the llvm.part.select overloaded intrinsic names to only
207 // use one type specifier in the name. We only care about the old format
208 // 'llvm.part.select.i*.i*', and solve as above with bswap.
209 if (Name.compare(5,12,"part.select.",12) == 0) {
210 std::string::size_type delim = Name.find('.',17);
212 if (delim != std::string::npos) {
213 // Construct a new name as 'llvm.part.select' + '.i*'
214 F->setName(Name.substr(0,16)+Name.substr(delim));
221 // This upgrades the llvm.part.set intrinsics similarly as above, however
222 // we care about 'llvm.part.set.i*.i*.i*', but only the first two types
223 // must match. There is an additional type specifier after these two
224 // matching types that we must retain when upgrading. Thus, we require
225 // finding 2 periods, not just one, after the intrinsic name.
226 if (Name.compare(5,9,"part.set.",9) == 0) {
227 std::string::size_type delim = Name.find('.',14);
229 if (delim != std::string::npos &&
230 Name.find('.',delim+1) != std::string::npos) {
231 // Construct a new name as 'llvm.part.select' + '.i*.i*'
232 F->setName(Name.substr(0,13)+Name.substr(delim));
241 // This fixes all MMX shift intrinsic instructions to take a
242 // v1i64 instead of a v2i32 as the second parameter.
243 if (Name.compare(5,10,"x86.mmx.ps",10) == 0 &&
244 (Name.compare(13,4,"psll", 4) == 0 ||
245 Name.compare(13,4,"psra", 4) == 0 ||
246 Name.compare(13,4,"psrl", 4) == 0) && Name[17] != 'i') {
248 const llvm::Type *VT =
249 VectorType::get(IntegerType::get(FTy->getContext(), 64), 1);
251 // We don't have to do anything if the parameter already has
253 if (FTy->getParamType(1) == VT)
256 // We first need to change the name of the old (bad) intrinsic, because
257 // its type is incorrect, but we cannot overload that name. We
258 // arbitrarily unique it here allowing us to construct a correctly named
259 // and typed function below.
262 assert(FTy->getNumParams() == 2 && "MMX shift intrinsics take 2 args!");
264 // Now construct the new intrinsic with the correct name and type. We
265 // leave the old function around in order to query its type, whatever it
266 // may be, and correctly convert up to the new type.
267 NewFn = cast<Function>(M->getOrInsertFunction(Name,
268 FTy->getReturnType(),
269 FTy->getParamType(0),
273 } else if (Name.compare(5,17,"x86.sse2.loadh.pd",17) == 0 ||
274 Name.compare(5,17,"x86.sse2.loadl.pd",17) == 0 ||
275 Name.compare(5,16,"x86.sse2.movl.dq",16) == 0 ||
276 Name.compare(5,15,"x86.sse2.movs.d",15) == 0 ||
277 Name.compare(5,16,"x86.sse2.shuf.pd",16) == 0 ||
278 Name.compare(5,18,"x86.sse2.unpckh.pd",18) == 0 ||
279 Name.compare(5,18,"x86.sse2.unpckl.pd",18) == 0 ||
280 Name.compare(5,20,"x86.sse2.punpckh.qdq",20) == 0 ||
281 Name.compare(5,20,"x86.sse2.punpckl.qdq",20) == 0) {
282 // Calls to these intrinsics are transformed into ShuffleVector's.
285 } else if (Name.compare(5, 16, "x86.sse41.pmulld", 16) == 0) {
286 // Calls to these intrinsics are transformed into vector multiplies.
289 } else if (Name.compare(5, 18, "x86.ssse3.palign.r", 18) == 0 ||
290 Name.compare(5, 22, "x86.ssse3.palign.r.128", 22) == 0) {
291 // Calls to these intrinsics are transformed into vector shuffles, shifts,
300 // This may not belong here. This function is effectively being overloaded
301 // to both detect an intrinsic which needs upgrading, and to provide the
302 // upgraded form of the intrinsic. We should perhaps have two separate
303 // functions for this.
307 bool llvm::UpgradeIntrinsicFunction(Function *F, Function *&NewFn) {
309 bool Upgraded = UpgradeIntrinsicFunction1(F, NewFn);
311 // Upgrade intrinsic attributes. This does not change the function.
314 if (unsigned id = F->getIntrinsicID())
315 F->setAttributes(Intrinsic::getAttributes((Intrinsic::ID)id));
319 // UpgradeIntrinsicCall - Upgrade a call to an old intrinsic to be a call the
320 // upgraded intrinsic. All argument and return casting must be provided in
321 // order to seamlessly integrate with existing context.
322 void llvm::UpgradeIntrinsicCall(CallInst *CI, Function *NewFn) {
323 Function *F = CI->getCalledFunction();
324 LLVMContext &C = CI->getContext();
325 ImmutableCallSite CS(CI);
327 assert(F && "CallInst has no function associated with it.");
330 // Get the Function's name.
331 const std::string& Name = F->getName();
333 // Upgrade ARM NEON intrinsics.
334 if (Name.compare(5, 9, "arm.neon.", 9) == 0) {
336 if (Name.compare(14, 7, "vmovls.", 7) == 0) {
337 NewI = new SExtInst(CI->getArgOperand(0), CI->getType(),
338 "upgraded." + CI->getName(), CI);
339 } else if (Name.compare(14, 7, "vmovlu.", 7) == 0) {
340 NewI = new ZExtInst(CI->getArgOperand(0), CI->getType(),
341 "upgraded." + CI->getName(), CI);
343 llvm_unreachable("Unknown arm.neon function for CallInst upgrade.");
345 // Replace any uses of the old CallInst.
346 if (!CI->use_empty())
347 CI->replaceAllUsesWith(NewI);
348 CI->eraseFromParent();
352 bool isLoadH = false, isLoadL = false, isMovL = false;
353 bool isMovSD = false, isShufPD = false;
354 bool isUnpckhPD = false, isUnpcklPD = false;
355 bool isPunpckhQPD = false, isPunpcklQPD = false;
356 if (F->getName() == "llvm.x86.sse2.loadh.pd")
358 else if (F->getName() == "llvm.x86.sse2.loadl.pd")
360 else if (F->getName() == "llvm.x86.sse2.movl.dq")
362 else if (F->getName() == "llvm.x86.sse2.movs.d")
364 else if (F->getName() == "llvm.x86.sse2.shuf.pd")
366 else if (F->getName() == "llvm.x86.sse2.unpckh.pd")
368 else if (F->getName() == "llvm.x86.sse2.unpckl.pd")
370 else if (F->getName() == "llvm.x86.sse2.punpckh.qdq")
372 else if (F->getName() == "llvm.x86.sse2.punpckl.qdq")
375 if (isLoadH || isLoadL || isMovL || isMovSD || isShufPD ||
376 isUnpckhPD || isUnpcklPD || isPunpckhQPD || isPunpcklQPD) {
377 std::vector<Constant*> Idxs;
378 Value *Op0 = CI->getArgOperand(0);
379 ShuffleVectorInst *SI = NULL;
380 if (isLoadH || isLoadL) {
381 Value *Op1 = UndefValue::get(Op0->getType());
382 Value *Addr = new BitCastInst(CI->getArgOperand(1),
383 Type::getDoublePtrTy(C),
385 Value *Load = new LoadInst(Addr, "upgraded.", false, 8, CI);
386 Value *Idx = ConstantInt::get(Type::getInt32Ty(C), 0);
387 Op1 = InsertElementInst::Create(Op1, Load, Idx, "upgraded.", CI);
390 Idxs.push_back(ConstantInt::get(Type::getInt32Ty(C), 0));
391 Idxs.push_back(ConstantInt::get(Type::getInt32Ty(C), 2));
393 Idxs.push_back(ConstantInt::get(Type::getInt32Ty(C), 2));
394 Idxs.push_back(ConstantInt::get(Type::getInt32Ty(C), 1));
396 Value *Mask = ConstantVector::get(Idxs);
397 SI = new ShuffleVectorInst(Op0, Op1, Mask, "upgraded.", CI);
399 Constant *Zero = ConstantInt::get(Type::getInt32Ty(C), 0);
400 Idxs.push_back(Zero);
401 Idxs.push_back(Zero);
402 Idxs.push_back(Zero);
403 Idxs.push_back(Zero);
404 Value *ZeroV = ConstantVector::get(Idxs);
407 Idxs.push_back(ConstantInt::get(Type::getInt32Ty(C), 4));
408 Idxs.push_back(ConstantInt::get(Type::getInt32Ty(C), 5));
409 Idxs.push_back(ConstantInt::get(Type::getInt32Ty(C), 2));
410 Idxs.push_back(ConstantInt::get(Type::getInt32Ty(C), 3));
411 Value *Mask = ConstantVector::get(Idxs);
412 SI = new ShuffleVectorInst(ZeroV, Op0, Mask, "upgraded.", CI);
413 } else if (isMovSD ||
414 isUnpckhPD || isUnpcklPD || isPunpckhQPD || isPunpcklQPD) {
415 Value *Op1 = CI->getArgOperand(1);
417 Idxs.push_back(ConstantInt::get(Type::getInt32Ty(C), 2));
418 Idxs.push_back(ConstantInt::get(Type::getInt32Ty(C), 1));
419 } else if (isUnpckhPD || isPunpckhQPD) {
420 Idxs.push_back(ConstantInt::get(Type::getInt32Ty(C), 1));
421 Idxs.push_back(ConstantInt::get(Type::getInt32Ty(C), 3));
423 Idxs.push_back(ConstantInt::get(Type::getInt32Ty(C), 0));
424 Idxs.push_back(ConstantInt::get(Type::getInt32Ty(C), 2));
426 Value *Mask = ConstantVector::get(Idxs);
427 SI = new ShuffleVectorInst(Op0, Op1, Mask, "upgraded.", CI);
428 } else if (isShufPD) {
429 Value *Op1 = CI->getArgOperand(1);
431 cast<ConstantInt>(CI->getArgOperand(2))->getZExtValue();
432 Idxs.push_back(ConstantInt::get(Type::getInt32Ty(C), MaskVal & 1));
433 Idxs.push_back(ConstantInt::get(Type::getInt32Ty(C),
434 ((MaskVal >> 1) & 1)+2));
435 Value *Mask = ConstantVector::get(Idxs);
436 SI = new ShuffleVectorInst(Op0, Op1, Mask, "upgraded.", CI);
439 assert(SI && "Unexpected!");
441 // Handle any uses of the old CallInst.
442 if (!CI->use_empty())
443 // Replace all uses of the old call with the new cast which has the
445 CI->replaceAllUsesWith(SI);
447 // Clean up the old call now that it has been completely upgraded.
448 CI->eraseFromParent();
449 } else if (F->getName() == "llvm.x86.sse41.pmulld") {
450 // Upgrade this set of intrinsics into vector multiplies.
451 Instruction *Mul = BinaryOperator::CreateMul(CI->getArgOperand(0),
452 CI->getArgOperand(1),
455 // Fix up all the uses with our new multiply.
456 if (!CI->use_empty())
457 CI->replaceAllUsesWith(Mul);
459 // Remove upgraded multiply.
460 CI->eraseFromParent();
461 } else if (F->getName() == "llvm.x86.ssse3.palign.r") {
462 Value *Op1 = CI->getArgOperand(0);
463 Value *Op2 = CI->getArgOperand(1);
464 Value *Op3 = CI->getArgOperand(2);
465 unsigned shiftVal = cast<ConstantInt>(Op3)->getZExtValue();
467 IRBuilder<> Builder(C);
468 Builder.SetInsertPoint(CI->getParent(), CI);
470 // If palignr is shifting the pair of input vectors less than 9 bytes,
471 // emit a shuffle instruction.
473 const Type *IntTy = Type::getInt32Ty(C);
474 const Type *EltTy = Type::getInt8Ty(C);
475 const Type *VecTy = VectorType::get(EltTy, 8);
477 Op2 = Builder.CreateBitCast(Op2, VecTy);
478 Op1 = Builder.CreateBitCast(Op1, VecTy);
480 llvm::SmallVector<llvm::Constant*, 8> Indices;
481 for (unsigned i = 0; i != 8; ++i)
482 Indices.push_back(ConstantInt::get(IntTy, shiftVal + i));
484 Value *SV = ConstantVector::get(Indices.begin(), Indices.size());
485 Rep = Builder.CreateShuffleVector(Op2, Op1, SV, "palignr");
486 Rep = Builder.CreateBitCast(Rep, F->getReturnType());
489 // If palignr is shifting the pair of input vectors more than 8 but less
490 // than 16 bytes, emit a logical right shift of the destination.
491 else if (shiftVal < 16) {
492 // MMX has these as 1 x i64 vectors for some odd optimization reasons.
493 const Type *EltTy = Type::getInt64Ty(C);
494 const Type *VecTy = VectorType::get(EltTy, 1);
496 Op1 = Builder.CreateBitCast(Op1, VecTy, "cast");
497 Op2 = ConstantInt::get(VecTy, (shiftVal-8) * 8);
499 // create i32 constant
501 Intrinsic::getDeclaration(F->getParent(), Intrinsic::x86_mmx_psrl_q);
502 Rep = Builder.CreateCall2(I, Op1, Op2, "palignr");
505 // If palignr is shifting the pair of vectors more than 32 bytes, emit zero.
507 Rep = Constant::getNullValue(F->getReturnType());
510 // Replace any uses with our new instruction.
511 if (!CI->use_empty())
512 CI->replaceAllUsesWith(Rep);
514 // Remove upgraded instruction.
515 CI->eraseFromParent();
517 } else if (F->getName() == "llvm.x86.ssse3.palign.r.128") {
518 Value *Op1 = CI->getArgOperand(0);
519 Value *Op2 = CI->getArgOperand(1);
520 Value *Op3 = CI->getArgOperand(2);
521 unsigned shiftVal = cast<ConstantInt>(Op3)->getZExtValue();
523 IRBuilder<> Builder(C);
524 Builder.SetInsertPoint(CI->getParent(), CI);
526 // If palignr is shifting the pair of input vectors less than 17 bytes,
527 // emit a shuffle instruction.
528 if (shiftVal <= 16) {
529 const Type *IntTy = Type::getInt32Ty(C);
530 const Type *EltTy = Type::getInt8Ty(C);
531 const Type *VecTy = VectorType::get(EltTy, 16);
533 Op2 = Builder.CreateBitCast(Op2, VecTy);
534 Op1 = Builder.CreateBitCast(Op1, VecTy);
536 llvm::SmallVector<llvm::Constant*, 16> Indices;
537 for (unsigned i = 0; i != 16; ++i)
538 Indices.push_back(ConstantInt::get(IntTy, shiftVal + i));
540 Value *SV = ConstantVector::get(Indices.begin(), Indices.size());
541 Rep = Builder.CreateShuffleVector(Op2, Op1, SV, "palignr");
542 Rep = Builder.CreateBitCast(Rep, F->getReturnType());
545 // If palignr is shifting the pair of input vectors more than 16 but less
546 // than 32 bytes, emit a logical right shift of the destination.
547 else if (shiftVal < 32) {
548 const Type *EltTy = Type::getInt64Ty(C);
549 const Type *VecTy = VectorType::get(EltTy, 2);
550 const Type *IntTy = Type::getInt32Ty(C);
552 Op1 = Builder.CreateBitCast(Op1, VecTy, "cast");
553 Op2 = ConstantInt::get(IntTy, (shiftVal-16) * 8);
555 // create i32 constant
557 Intrinsic::getDeclaration(F->getParent(), Intrinsic::x86_sse2_psrl_dq);
558 Rep = Builder.CreateCall2(I, Op1, Op2, "palignr");
561 // If palignr is shifting the pair of vectors more than 32 bytes, emit zero.
563 Rep = Constant::getNullValue(F->getReturnType());
566 // Replace any uses with our new instruction.
567 if (!CI->use_empty())
568 CI->replaceAllUsesWith(Rep);
570 // Remove upgraded instruction.
571 CI->eraseFromParent();
574 llvm_unreachable("Unknown function for CallInst upgrade.");
579 switch (NewFn->getIntrinsicID()) {
580 default: llvm_unreachable("Unknown function for CallInst upgrade.");
581 case Intrinsic::x86_mmx_psll_d:
582 case Intrinsic::x86_mmx_psll_q:
583 case Intrinsic::x86_mmx_psll_w:
584 case Intrinsic::x86_mmx_psra_d:
585 case Intrinsic::x86_mmx_psra_w:
586 case Intrinsic::x86_mmx_psrl_d:
587 case Intrinsic::x86_mmx_psrl_q:
588 case Intrinsic::x86_mmx_psrl_w: {
591 Operands[0] = CI->getArgOperand(0);
593 // Cast the second parameter to the correct type.
594 BitCastInst *BC = new BitCastInst(CI->getArgOperand(1),
595 NewFn->getFunctionType()->getParamType(1),
599 // Construct a new CallInst
600 CallInst *NewCI = CallInst::Create(NewFn, Operands, Operands+2,
601 "upgraded."+CI->getName(), CI);
602 NewCI->setTailCall(CI->isTailCall());
603 NewCI->setCallingConv(CI->getCallingConv());
605 // Handle any uses of the old CallInst.
606 if (!CI->use_empty())
607 // Replace all uses of the old call with the new cast which has the
609 CI->replaceAllUsesWith(NewCI);
611 // Clean up the old call now that it has been completely upgraded.
612 CI->eraseFromParent();
615 case Intrinsic::ctlz:
616 case Intrinsic::ctpop:
617 case Intrinsic::cttz: {
618 // Build a small vector of the original arguments.
619 SmallVector<Value*, 8> Operands(CS.arg_begin(), CS.arg_end());
621 // Construct a new CallInst
622 CallInst *NewCI = CallInst::Create(NewFn, Operands.begin(), Operands.end(),
623 "upgraded."+CI->getName(), CI);
624 NewCI->setTailCall(CI->isTailCall());
625 NewCI->setCallingConv(CI->getCallingConv());
627 // Handle any uses of the old CallInst.
628 if (!CI->use_empty()) {
629 // Check for sign extend parameter attributes on the return values.
630 bool SrcSExt = NewFn->getAttributes().paramHasAttr(0, Attribute::SExt);
631 bool DestSExt = F->getAttributes().paramHasAttr(0, Attribute::SExt);
633 // Construct an appropriate cast from the new return type to the old.
634 CastInst *RetCast = CastInst::Create(
635 CastInst::getCastOpcode(NewCI, SrcSExt,
638 NewCI, F->getReturnType(),
639 NewCI->getName(), CI);
640 NewCI->moveBefore(RetCast);
642 // Replace all uses of the old call with the new cast which has the
644 CI->replaceAllUsesWith(RetCast);
647 // Clean up the old call now that it has been completely upgraded.
648 CI->eraseFromParent();
651 case Intrinsic::eh_selector:
652 case Intrinsic::eh_typeid_for: {
653 // Only the return type changed.
654 SmallVector<Value*, 8> Operands(CS.arg_begin(), CS.arg_end());
655 CallInst *NewCI = CallInst::Create(NewFn, Operands.begin(), Operands.end(),
656 "upgraded." + CI->getName(), CI);
657 NewCI->setTailCall(CI->isTailCall());
658 NewCI->setCallingConv(CI->getCallingConv());
660 // Handle any uses of the old CallInst.
661 if (!CI->use_empty()) {
662 // Construct an appropriate cast from the new return type to the old.
664 CastInst::Create(CastInst::getCastOpcode(NewCI, true,
665 F->getReturnType(), true),
666 NewCI, F->getReturnType(), NewCI->getName(), CI);
667 CI->replaceAllUsesWith(RetCast);
669 CI->eraseFromParent();
672 case Intrinsic::memcpy:
673 case Intrinsic::memmove:
674 case Intrinsic::memset: {
676 const llvm::Type *I1Ty = llvm::Type::getInt1Ty(CI->getContext());
677 Value *Operands[5] = { CI->getArgOperand(0), CI->getArgOperand(1),
678 CI->getArgOperand(2), CI->getArgOperand(3),
679 llvm::ConstantInt::get(I1Ty, 0) };
680 CallInst *NewCI = CallInst::Create(NewFn, Operands, Operands+5,
682 NewCI->setTailCall(CI->isTailCall());
683 NewCI->setCallingConv(CI->getCallingConv());
684 // Handle any uses of the old CallInst.
685 if (!CI->use_empty())
686 // Replace all uses of the old call with the new cast which has the
688 CI->replaceAllUsesWith(NewCI);
690 // Clean up the old call now that it has been completely upgraded.
691 CI->eraseFromParent();
697 // This tests each Function to determine if it needs upgrading. When we find
698 // one we are interested in, we then upgrade all calls to reflect the new
700 void llvm::UpgradeCallsToIntrinsic(Function* F) {
701 assert(F && "Illegal attempt to upgrade a non-existent intrinsic.");
703 // Upgrade the function and check if it is a totaly new function.
705 if (UpgradeIntrinsicFunction(F, NewFn)) {
707 // Replace all uses to the old function with the new one if necessary.
708 for (Value::use_iterator UI = F->use_begin(), UE = F->use_end();
710 if (CallInst* CI = dyn_cast<CallInst>(*UI++))
711 UpgradeIntrinsicCall(CI, NewFn);
713 // Remove old function, no longer used, from the module.
714 F->eraseFromParent();
719 /// This function strips all debug info intrinsics, except for llvm.dbg.declare.
720 /// If an llvm.dbg.declare intrinsic is invalid, then this function simply
722 void llvm::CheckDebugInfoIntrinsics(Module *M) {
725 if (Function *FuncStart = M->getFunction("llvm.dbg.func.start")) {
726 while (!FuncStart->use_empty()) {
727 CallInst *CI = cast<CallInst>(FuncStart->use_back());
728 CI->eraseFromParent();
730 FuncStart->eraseFromParent();
733 if (Function *StopPoint = M->getFunction("llvm.dbg.stoppoint")) {
734 while (!StopPoint->use_empty()) {
735 CallInst *CI = cast<CallInst>(StopPoint->use_back());
736 CI->eraseFromParent();
738 StopPoint->eraseFromParent();
741 if (Function *RegionStart = M->getFunction("llvm.dbg.region.start")) {
742 while (!RegionStart->use_empty()) {
743 CallInst *CI = cast<CallInst>(RegionStart->use_back());
744 CI->eraseFromParent();
746 RegionStart->eraseFromParent();
749 if (Function *RegionEnd = M->getFunction("llvm.dbg.region.end")) {
750 while (!RegionEnd->use_empty()) {
751 CallInst *CI = cast<CallInst>(RegionEnd->use_back());
752 CI->eraseFromParent();
754 RegionEnd->eraseFromParent();
757 if (Function *Declare = M->getFunction("llvm.dbg.declare")) {
758 if (!Declare->use_empty()) {
759 DbgDeclareInst *DDI = cast<DbgDeclareInst>(Declare->use_back());
760 if (!isa<MDNode>(DDI->getArgOperand(0)) ||
761 !isa<MDNode>(DDI->getArgOperand(1))) {
762 while (!Declare->use_empty()) {
763 CallInst *CI = cast<CallInst>(Declare->use_back());
764 CI->eraseFromParent();
766 Declare->eraseFromParent();