InstCombineCalls.cpp revision 36b56886974eae4f9c5ebc96befd3e7bfe5de338
1753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner//===- InstCombineCalls.cpp -----------------------------------------------===// 2753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner// 3753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner// The LLVM Compiler Infrastructure 4753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner// 5753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner// This file is distributed under the University of Illinois Open Source 6753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner// License. See LICENSE.TXT for details. 7753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner// 8753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner//===----------------------------------------------------------------------===// 9753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner// 10753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner// This file implements the visitCall and visitInvoke functions. 11753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner// 12753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner//===----------------------------------------------------------------------===// 13753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner 14753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner#include "InstCombine.h" 1563f932ca3c91ea8ac5b592158f5e8ef7de550547Meador Inge#include "llvm/ADT/Statistic.h" 16753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner#include "llvm/Analysis/MemoryBuiltins.h" 1736b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines#include "llvm/IR/CallSite.h" 180b8c9a80f20772c3793201ab5b251d3520b9cea3Chandler Carruth#include "llvm/IR/DataLayout.h" 1936b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines#include "llvm/IR/PatternMatch.h" 2027ceaa13f820e33c44e29adc2095dd3e1e69d09fEric Christopher#include "llvm/Transforms/Utils/BuildLibCalls.h" 21687140c818ba4b896329a83324714140b6580ef8Chris Lattner#include "llvm/Transforms/Utils/Local.h" 22753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattnerusing namespace llvm; 238ad435fa4809b5a4ad1043435cbafd5c9ddf2d93Michael Ilsemanusing namespace PatternMatch; 24753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner 2563f932ca3c91ea8ac5b592158f5e8ef7de550547Meador IngeSTATISTIC(NumSimplified, "Number of library calls simplified"); 2663f932ca3c91ea8ac5b592158f5e8ef7de550547Meador Inge 27753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner/// getPromotedType - Return the specified type promoted as it would be to pass 28753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner/// though a va_arg area. 29db125cfaf57cc83e7dd7453de2d509bc8efd0e5eChris Lattnerstatic Type *getPromotedType(Type *Ty) { 30db125cfaf57cc83e7dd7453de2d509bc8efd0e5eChris Lattner if (IntegerType* ITy = dyn_cast<IntegerType>(Ty)) { 31753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner if (ITy->getBitWidth() < 32) 32753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner return Type::getInt32Ty(Ty->getContext()); 33753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner } 34753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner return Ty; 35753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner} 36753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner 37ce52bc53538df8e5412ec507f2da3661c991baf1Dan Gohman/// reduceToSingleValueType - Given an aggregate type which ultimately holds a 38ce52bc53538df8e5412ec507f2da3661c991baf1Dan Gohman/// single scalar element, like {{{type}}} or [1 x type], return type. 39ce52bc53538df8e5412ec507f2da3661c991baf1Dan Gohmanstatic Type *reduceToSingleValueType(Type *T) { 40ce52bc53538df8e5412ec507f2da3661c991baf1Dan Gohman while (!T->isSingleValueType()) { 41ce52bc53538df8e5412ec507f2da3661c991baf1Dan Gohman if (StructType *STy = dyn_cast<StructType>(T)) { 42ce52bc53538df8e5412ec507f2da3661c991baf1Dan Gohman if (STy->getNumElements() == 1) 43ce52bc53538df8e5412ec507f2da3661c991baf1Dan Gohman T = STy->getElementType(0); 44ce52bc53538df8e5412ec507f2da3661c991baf1Dan Gohman else 45ce52bc53538df8e5412ec507f2da3661c991baf1Dan Gohman break; 46ce52bc53538df8e5412ec507f2da3661c991baf1Dan Gohman } else if (ArrayType *ATy = dyn_cast<ArrayType>(T)) { 47ce52bc53538df8e5412ec507f2da3661c991baf1Dan Gohman if (ATy->getNumElements() == 1) 48ce52bc53538df8e5412ec507f2da3661c991baf1Dan Gohman T = ATy->getElementType(); 49ce52bc53538df8e5412ec507f2da3661c991baf1Dan Gohman else 50ce52bc53538df8e5412ec507f2da3661c991baf1Dan Gohman break; 51ce52bc53538df8e5412ec507f2da3661c991baf1Dan Gohman } else 52ce52bc53538df8e5412ec507f2da3661c991baf1Dan Gohman break; 53ce52bc53538df8e5412ec507f2da3661c991baf1Dan Gohman } 54ce52bc53538df8e5412ec507f2da3661c991baf1Dan Gohman 55ce52bc53538df8e5412ec507f2da3661c991baf1Dan Gohman return T; 56ce52bc53538df8e5412ec507f2da3661c991baf1Dan Gohman} 57753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner 58753a2b464d0628231bd3dce645edd05dfbaa3a06Chris LattnerInstruction *InstCombiner::SimplifyMemTransfer(MemIntrinsic *MI) { 5936b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines unsigned DstAlign = getKnownAlignment(MI->getArgOperand(0), DL); 6036b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines unsigned SrcAlign = getKnownAlignment(MI->getArgOperand(1), DL); 61753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner unsigned MinAlign = std::min(DstAlign, SrcAlign); 62753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner unsigned CopyAlign = MI->getAlignment(); 63753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner 64753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner if (CopyAlign < MinAlign) { 6500e403abe384b8f61dd012242d3d81a23541ca25Jim Grosbach MI->setAlignment(ConstantInt::get(MI->getAlignmentType(), 66753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner MinAlign, false)); 67753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner return MI; 68753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner } 6900e403abe384b8f61dd012242d3d81a23541ca25Jim Grosbach 70753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // If MemCpyInst length is 1/2/4/8 bytes then replace memcpy with 71753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // load/store. 72bcda85c74304ffada586a9c58ce9bcff93b69a86Gabor Greif ConstantInt *MemOpLength = dyn_cast<ConstantInt>(MI->getArgOperand(2)); 73753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner if (MemOpLength == 0) return 0; 7400e403abe384b8f61dd012242d3d81a23541ca25Jim Grosbach 75753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // Source and destination pointer types are always "i8*" for intrinsic. See 76753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // if the size is something we can handle with a single primitive load/store. 77753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // A single load+store correctly handles overlapping memory in the memmove 78753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // case. 799441ad0b6e02ee9558168b37a9620ef1afe79388Michael Liao uint64_t Size = MemOpLength->getLimitedValue(); 8036b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines assert(Size && "0-sized memory transferring should be removed already."); 8100e403abe384b8f61dd012242d3d81a23541ca25Jim Grosbach 82753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner if (Size > 8 || (Size&(Size-1))) 83753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner return 0; // If not 1/2/4/8 bytes, exit. 8400e403abe384b8f61dd012242d3d81a23541ca25Jim Grosbach 85753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // Use an integer load+store unless we can find something better. 8620adc9dc4650313f017b27d9818eb2176238113dMon P Wang unsigned SrcAddrSp = 87bcda85c74304ffada586a9c58ce9bcff93b69a86Gabor Greif cast<PointerType>(MI->getArgOperand(1)->getType())->getAddressSpace(); 884ec2258ffb495d7ce00177e447740ef1123a27dbGabor Greif unsigned DstAddrSp = 89bcda85c74304ffada586a9c58ce9bcff93b69a86Gabor Greif cast<PointerType>(MI->getArgOperand(0)->getType())->getAddressSpace(); 9020adc9dc4650313f017b27d9818eb2176238113dMon P Wang 91db125cfaf57cc83e7dd7453de2d509bc8efd0e5eChris Lattner IntegerType* IntType = IntegerType::get(MI->getContext(), Size<<3); 9220adc9dc4650313f017b27d9818eb2176238113dMon P Wang Type *NewSrcPtrTy = PointerType::get(IntType, SrcAddrSp); 9320adc9dc4650313f017b27d9818eb2176238113dMon P Wang Type *NewDstPtrTy = PointerType::get(IntType, DstAddrSp); 9400e403abe384b8f61dd012242d3d81a23541ca25Jim Grosbach 95753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // Memcpy forces the use of i8* for the source and destination. That means 96753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // that if you're using memcpy to move one double around, you'll get a cast 97753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // from double* to i8*. We'd much rather use a double load+store rather than 98753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // an i64 load+store, here because this improves the odds that the source or 99753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // dest address will be promotable. See if we can find a better type than the 100753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // integer datatype. 101cea7ac7c01c6a15eccb2cb7a181df1baf915de0dGabor Greif Value *StrippedDest = MI->getArgOperand(0)->stripPointerCasts(); 102b998913ff4aa58c3c342e167c785029cb331078eDan Gohman MDNode *CopyMD = 0; 103cea7ac7c01c6a15eccb2cb7a181df1baf915de0dGabor Greif if (StrippedDest != MI->getArgOperand(0)) { 104db125cfaf57cc83e7dd7453de2d509bc8efd0e5eChris Lattner Type *SrcETy = cast<PointerType>(StrippedDest->getType()) 105753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner ->getElementType(); 10636b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines if (DL && SrcETy->isSized() && DL->getTypeStoreSize(SrcETy) == Size) { 107753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // The SrcETy might be something like {{{double}}} or [1 x double]. Rip 108753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // down through these levels if so. 109ce52bc53538df8e5412ec507f2da3661c991baf1Dan Gohman SrcETy = reduceToSingleValueType(SrcETy); 11000e403abe384b8f61dd012242d3d81a23541ca25Jim Grosbach 11120adc9dc4650313f017b27d9818eb2176238113dMon P Wang if (SrcETy->isSingleValueType()) { 11220adc9dc4650313f017b27d9818eb2176238113dMon P Wang NewSrcPtrTy = PointerType::get(SrcETy, SrcAddrSp); 11320adc9dc4650313f017b27d9818eb2176238113dMon P Wang NewDstPtrTy = PointerType::get(SrcETy, DstAddrSp); 114b998913ff4aa58c3c342e167c785029cb331078eDan Gohman 115b998913ff4aa58c3c342e167c785029cb331078eDan Gohman // If the memcpy has metadata describing the members, see if we can 116b998913ff4aa58c3c342e167c785029cb331078eDan Gohman // get the TBAA tag describing our copy. 117b998913ff4aa58c3c342e167c785029cb331078eDan Gohman if (MDNode *M = MI->getMetadata(LLVMContext::MD_tbaa_struct)) { 118b998913ff4aa58c3c342e167c785029cb331078eDan Gohman if (M->getNumOperands() == 3 && 1195e01f80bf85b9a68352d4c146caa9ddcf6af6dcfNick Lewycky M->getOperand(0) && 120b998913ff4aa58c3c342e167c785029cb331078eDan Gohman isa<ConstantInt>(M->getOperand(0)) && 121b998913ff4aa58c3c342e167c785029cb331078eDan Gohman cast<ConstantInt>(M->getOperand(0))->isNullValue() && 1225e01f80bf85b9a68352d4c146caa9ddcf6af6dcfNick Lewycky M->getOperand(1) && 123b998913ff4aa58c3c342e167c785029cb331078eDan Gohman isa<ConstantInt>(M->getOperand(1)) && 124b998913ff4aa58c3c342e167c785029cb331078eDan Gohman cast<ConstantInt>(M->getOperand(1))->getValue() == Size && 1255e01f80bf85b9a68352d4c146caa9ddcf6af6dcfNick Lewycky M->getOperand(2) && 126b998913ff4aa58c3c342e167c785029cb331078eDan Gohman isa<MDNode>(M->getOperand(2))) 127b998913ff4aa58c3c342e167c785029cb331078eDan Gohman CopyMD = cast<MDNode>(M->getOperand(2)); 128b998913ff4aa58c3c342e167c785029cb331078eDan Gohman } 12920adc9dc4650313f017b27d9818eb2176238113dMon P Wang } 130753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner } 131753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner } 13200e403abe384b8f61dd012242d3d81a23541ca25Jim Grosbach 133753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // If the memcpy/memmove provides better alignment info than we can 134753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // infer, use it. 135753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner SrcAlign = std::max(SrcAlign, CopyAlign); 136753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner DstAlign = std::max(DstAlign, CopyAlign); 13700e403abe384b8f61dd012242d3d81a23541ca25Jim Grosbach 1389c68a7bb45ebf71cec5ab4eab7c73aacdfce16dfGabor Greif Value *Src = Builder->CreateBitCast(MI->getArgOperand(1), NewSrcPtrTy); 1399c68a7bb45ebf71cec5ab4eab7c73aacdfce16dfGabor Greif Value *Dest = Builder->CreateBitCast(MI->getArgOperand(0), NewDstPtrTy); 14059f15918c28ad340bb9f0ef78e43c2952a5b5c1cEli Friedman LoadInst *L = Builder->CreateLoad(Src, MI->isVolatile()); 14159f15918c28ad340bb9f0ef78e43c2952a5b5c1cEli Friedman L->setAlignment(SrcAlign); 142b998913ff4aa58c3c342e167c785029cb331078eDan Gohman if (CopyMD) 143b998913ff4aa58c3c342e167c785029cb331078eDan Gohman L->setMetadata(LLVMContext::MD_tbaa, CopyMD); 14459f15918c28ad340bb9f0ef78e43c2952a5b5c1cEli Friedman StoreInst *S = Builder->CreateStore(L, Dest, MI->isVolatile()); 14559f15918c28ad340bb9f0ef78e43c2952a5b5c1cEli Friedman S->setAlignment(DstAlign); 146b998913ff4aa58c3c342e167c785029cb331078eDan Gohman if (CopyMD) 147b998913ff4aa58c3c342e167c785029cb331078eDan Gohman S->setMetadata(LLVMContext::MD_tbaa, CopyMD); 148753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner 149753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // Set the size of the copy to 0, it will be deleted on the next iteration. 150a90c5c7605e0d8df96e61d4bf0cc47a7eaea92cfGabor Greif MI->setArgOperand(2, Constant::getNullValue(MemOpLength->getType())); 151753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner return MI; 152753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner} 153753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner 154753a2b464d0628231bd3dce645edd05dfbaa3a06Chris LattnerInstruction *InstCombiner::SimplifyMemSet(MemSetInst *MI) { 15536b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines unsigned Alignment = getKnownAlignment(MI->getDest(), DL); 156753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner if (MI->getAlignment() < Alignment) { 157753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner MI->setAlignment(ConstantInt::get(MI->getAlignmentType(), 158753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner Alignment, false)); 159753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner return MI; 160753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner } 16100e403abe384b8f61dd012242d3d81a23541ca25Jim Grosbach 162753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // Extract the length and alignment and fill if they are constant. 163753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner ConstantInt *LenC = dyn_cast<ConstantInt>(MI->getLength()); 164753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner ConstantInt *FillC = dyn_cast<ConstantInt>(MI->getValue()); 165b0bc6c361da9009e8414efde317d9bbff755f6c0Duncan Sands if (!LenC || !FillC || !FillC->getType()->isIntegerTy(8)) 166753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner return 0; 1679441ad0b6e02ee9558168b37a9620ef1afe79388Michael Liao uint64_t Len = LenC->getLimitedValue(); 168753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner Alignment = MI->getAlignment(); 1699441ad0b6e02ee9558168b37a9620ef1afe79388Michael Liao assert(Len && "0-sized memory setting should be removed already."); 17000e403abe384b8f61dd012242d3d81a23541ca25Jim Grosbach 171753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // memset(s,c,n) -> store s, c (for n=1,2,4,8) 172753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner if (Len <= 8 && isPowerOf2_32((uint32_t)Len)) { 173db125cfaf57cc83e7dd7453de2d509bc8efd0e5eChris Lattner Type *ITy = IntegerType::get(MI->getContext(), Len*8); // n=1 -> i8. 17400e403abe384b8f61dd012242d3d81a23541ca25Jim Grosbach 175753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner Value *Dest = MI->getDest(); 17655fb9b0fcf89501a0abe74808f4e08e0b3a17207Mon P Wang unsigned DstAddrSp = cast<PointerType>(Dest->getType())->getAddressSpace(); 17755fb9b0fcf89501a0abe74808f4e08e0b3a17207Mon P Wang Type *NewDstPtrTy = PointerType::get(ITy, DstAddrSp); 17855fb9b0fcf89501a0abe74808f4e08e0b3a17207Mon P Wang Dest = Builder->CreateBitCast(Dest, NewDstPtrTy); 179753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner 180753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // Alignment 0 is identity for alignment 1 for memset, but not store. 181753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner if (Alignment == 0) Alignment = 1; 18200e403abe384b8f61dd012242d3d81a23541ca25Jim Grosbach 183753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // Extract the fill value and store. 184753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner uint64_t Fill = FillC->getZExtValue()*0x0101010101010101ULL; 18559f15918c28ad340bb9f0ef78e43c2952a5b5c1cEli Friedman StoreInst *S = Builder->CreateStore(ConstantInt::get(ITy, Fill), Dest, 18659f15918c28ad340bb9f0ef78e43c2952a5b5c1cEli Friedman MI->isVolatile()); 18759f15918c28ad340bb9f0ef78e43c2952a5b5c1cEli Friedman S->setAlignment(Alignment); 18800e403abe384b8f61dd012242d3d81a23541ca25Jim Grosbach 189753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // Set the size of the copy to 0, it will be deleted on the next iteration. 190753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner MI->setLength(Constant::getNullValue(LenC->getType())); 191753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner return MI; 192753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner } 193753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner 194753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner return 0; 195753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner} 196753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner 19700e403abe384b8f61dd012242d3d81a23541ca25Jim Grosbach/// visitCallInst - CallInst simplification. This mostly only handles folding 198753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner/// of intrinsic instructions. For normal calls, it allows visitCallSite to do 199753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner/// the heavy lifting. 200753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner/// 201753a2b464d0628231bd3dce645edd05dfbaa3a06Chris LattnerInstruction *InstCombiner::visitCallInst(CallInst &CI) { 2028e0d1c03ca7fd86e6879b4e37d0d7f0e982feef6Benjamin Kramer if (isFreeCall(&CI, TLI)) 203753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner return visitFree(CI); 204753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner 205753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // If the caller function is nounwind, mark the call as nounwind, even if the 206753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // callee isn't. 207753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner if (CI.getParent()->getParent()->doesNotThrow() && 208753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner !CI.doesNotThrow()) { 209753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner CI.setDoesNotThrow(); 210753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner return &CI; 211753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner } 21200e403abe384b8f61dd012242d3d81a23541ca25Jim Grosbach 213753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner IntrinsicInst *II = dyn_cast<IntrinsicInst>(&CI); 214753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner if (!II) return visitCallSite(&CI); 215cea7ac7c01c6a15eccb2cb7a181df1baf915de0dGabor Greif 216753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // Intrinsics cannot occur in an invoke, so handle them here instead of in 217753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // visitCallSite. 218753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner if (MemIntrinsic *MI = dyn_cast<MemIntrinsic>(II)) { 219753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner bool Changed = false; 220753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner 221753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // memmove/cpy/set of zero bytes is a noop. 222753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner if (Constant *NumBytes = dyn_cast<Constant>(MI->getLength())) { 2236eff75104e660bae5b28963190a6940eeecb7484Chris Lattner if (NumBytes->isNullValue()) 2246eff75104e660bae5b28963190a6940eeecb7484Chris Lattner return EraseInstFromFunction(CI); 225753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner 226753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner if (ConstantInt *CI = dyn_cast<ConstantInt>(NumBytes)) 227753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner if (CI->getZExtValue() == 1) { 228753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // Replace the instruction with just byte operations. We would 229753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // transform other cases to loads/stores, but we don't know if 230753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // alignment is sufficient. 231753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner } 232753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner } 23300e403abe384b8f61dd012242d3d81a23541ca25Jim Grosbach 2346eff75104e660bae5b28963190a6940eeecb7484Chris Lattner // No other transformations apply to volatile transfers. 2356eff75104e660bae5b28963190a6940eeecb7484Chris Lattner if (MI->isVolatile()) 2366eff75104e660bae5b28963190a6940eeecb7484Chris Lattner return 0; 237753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner 238753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // If we have a memmove and the source operation is a constant global, 239753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // then the source and dest pointers can't alias, so we can change this 240753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // into a call to memcpy. 241753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner if (MemMoveInst *MMI = dyn_cast<MemMoveInst>(MI)) { 242753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner if (GlobalVariable *GVSrc = dyn_cast<GlobalVariable>(MMI->getSource())) 243753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner if (GVSrc->isConstant()) { 244551754c4958086cc6910da7c950f2875e212f5cfEric Christopher Module *M = CI.getParent()->getParent()->getParent(); 245753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner Intrinsic::ID MemCpyID = Intrinsic::memcpy; 2465fdd6c8793462549e3593890ec61573da06e3346Jay Foad Type *Tys[3] = { CI.getArgOperand(0)->getType(), 2475fdd6c8793462549e3593890ec61573da06e3346Jay Foad CI.getArgOperand(1)->getType(), 2485fdd6c8793462549e3593890ec61573da06e3346Jay Foad CI.getArgOperand(2)->getType() }; 249eb9a85f09e18b3fe88499710404b38d3a9128f62Benjamin Kramer CI.setCalledFunction(Intrinsic::getDeclaration(M, MemCpyID, Tys)); 250753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner Changed = true; 251753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner } 252753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner } 253753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner 254753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner if (MemTransferInst *MTI = dyn_cast<MemTransferInst>(MI)) { 255753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // memmove(x,x,size) -> noop. 256753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner if (MTI->getSource() == MTI->getDest()) 257753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner return EraseInstFromFunction(CI); 258551754c4958086cc6910da7c950f2875e212f5cfEric Christopher } 259753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner 260551754c4958086cc6910da7c950f2875e212f5cfEric Christopher // If we can determine a pointer alignment that is bigger than currently 261551754c4958086cc6910da7c950f2875e212f5cfEric Christopher // set, update the alignment. 262551754c4958086cc6910da7c950f2875e212f5cfEric Christopher if (isa<MemTransferInst>(MI)) { 263551754c4958086cc6910da7c950f2875e212f5cfEric Christopher if (Instruction *I = SimplifyMemTransfer(MI)) 264753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner return I; 265753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner } else if (MemSetInst *MSI = dyn_cast<MemSetInst>(MI)) { 266753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner if (Instruction *I = SimplifyMemSet(MSI)) 267753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner return I; 268753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner } 269c310fcc909c21c94d1e5b05a97763911568a3ed8Gabor Greif 270753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner if (Changed) return II; 271753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner } 27200e403abe384b8f61dd012242d3d81a23541ca25Jim Grosbach 273753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner switch (II->getIntrinsicID()) { 274753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner default: break; 275415326b4edcc967dfb03c5ab41923b195e7c3cb1Eric Christopher case Intrinsic::objectsize: { 2769e72a79ef4a9fcda482ce0b0e1f0bd6a4f16cffdNuno Lopes uint64_t Size; 27736b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines if (getObjectSize(II->getArgOperand(0), Size, DL, TLI)) 2789e72a79ef4a9fcda482ce0b0e1f0bd6a4f16cffdNuno Lopes return ReplaceInstUsesWith(CI, ConstantInt::get(CI.getType(), Size)); 2799e72a79ef4a9fcda482ce0b0e1f0bd6a4f16cffdNuno Lopes return 0; 280415326b4edcc967dfb03c5ab41923b195e7c3cb1Eric Christopher } 2818ad435fa4809b5a4ad1043435cbafd5c9ddf2d93Michael Ilseman case Intrinsic::bswap: { 2828ad435fa4809b5a4ad1043435cbafd5c9ddf2d93Michael Ilseman Value *IIOperand = II->getArgOperand(0); 2838ad435fa4809b5a4ad1043435cbafd5c9ddf2d93Michael Ilseman Value *X = 0; 2848ad435fa4809b5a4ad1043435cbafd5c9ddf2d93Michael Ilseman 285753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // bswap(bswap(x)) -> x 2868ad435fa4809b5a4ad1043435cbafd5c9ddf2d93Michael Ilseman if (match(IIOperand, m_BSwap(m_Value(X)))) 2878ad435fa4809b5a4ad1043435cbafd5c9ddf2d93Michael Ilseman return ReplaceInstUsesWith(CI, X); 28800e403abe384b8f61dd012242d3d81a23541ca25Jim Grosbach 289753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // bswap(trunc(bswap(x))) -> trunc(lshr(x, c)) 2908ad435fa4809b5a4ad1043435cbafd5c9ddf2d93Michael Ilseman if (match(IIOperand, m_Trunc(m_BSwap(m_Value(X))))) { 2918ad435fa4809b5a4ad1043435cbafd5c9ddf2d93Michael Ilseman unsigned C = X->getType()->getPrimitiveSizeInBits() - 2928ad435fa4809b5a4ad1043435cbafd5c9ddf2d93Michael Ilseman IIOperand->getType()->getPrimitiveSizeInBits(); 2938ad435fa4809b5a4ad1043435cbafd5c9ddf2d93Michael Ilseman Value *CV = ConstantInt::get(X->getType(), C); 2948ad435fa4809b5a4ad1043435cbafd5c9ddf2d93Michael Ilseman Value *V = Builder->CreateLShr(X, CV); 2958ad435fa4809b5a4ad1043435cbafd5c9ddf2d93Michael Ilseman return new TruncInst(V, IIOperand->getType()); 296753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner } 297753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner break; 2988ad435fa4809b5a4ad1043435cbafd5c9ddf2d93Michael Ilseman } 2998ad435fa4809b5a4ad1043435cbafd5c9ddf2d93Michael Ilseman 300753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner case Intrinsic::powi: 301cea7ac7c01c6a15eccb2cb7a181df1baf915de0dGabor Greif if (ConstantInt *Power = dyn_cast<ConstantInt>(II->getArgOperand(1))) { 302753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // powi(x, 0) -> 1.0 303753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner if (Power->isZero()) 304753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner return ReplaceInstUsesWith(CI, ConstantFP::get(CI.getType(), 1.0)); 305753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // powi(x, 1) -> x 306753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner if (Power->isOne()) 307cea7ac7c01c6a15eccb2cb7a181df1baf915de0dGabor Greif return ReplaceInstUsesWith(CI, II->getArgOperand(0)); 308753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // powi(x, -1) -> 1/x 309753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner if (Power->isAllOnesValue()) 310753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner return BinaryOperator::CreateFDiv(ConstantFP::get(CI.getType(), 1.0), 311cea7ac7c01c6a15eccb2cb7a181df1baf915de0dGabor Greif II->getArgOperand(0)); 312753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner } 313753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner break; 314753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner case Intrinsic::cttz: { 315753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // If all bits below the first known one are known zero, 316753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // this value is constant. 317db125cfaf57cc83e7dd7453de2d509bc8efd0e5eChris Lattner IntegerType *IT = dyn_cast<IntegerType>(II->getArgOperand(0)->getType()); 318f1ac465b67d5fc11a0d9cd09b98ceb4ffa75dd97Owen Anderson // FIXME: Try to simplify vectors of integers. 319f1ac465b67d5fc11a0d9cd09b98ceb4ffa75dd97Owen Anderson if (!IT) break; 320753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner uint32_t BitWidth = IT->getBitWidth(); 321753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner APInt KnownZero(BitWidth, 0); 322753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner APInt KnownOne(BitWidth, 0); 32326c8dcc692fb2addd475446cfff24d6a4e958bcaRafael Espindola ComputeMaskedBits(II->getArgOperand(0), KnownZero, KnownOne); 324753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner unsigned TrailingZeros = KnownOne.countTrailingZeros(); 325753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner APInt Mask(APInt::getLowBitsSet(BitWidth, TrailingZeros)); 326753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner if ((Mask & KnownZero) == Mask) 327753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner return ReplaceInstUsesWith(CI, ConstantInt::get(IT, 328753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner APInt(BitWidth, TrailingZeros))); 32900e403abe384b8f61dd012242d3d81a23541ca25Jim Grosbach 330753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner } 331753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner break; 332753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner case Intrinsic::ctlz: { 333753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // If all bits above the first known one are known zero, 334753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // this value is constant. 335db125cfaf57cc83e7dd7453de2d509bc8efd0e5eChris Lattner IntegerType *IT = dyn_cast<IntegerType>(II->getArgOperand(0)->getType()); 336f1ac465b67d5fc11a0d9cd09b98ceb4ffa75dd97Owen Anderson // FIXME: Try to simplify vectors of integers. 337f1ac465b67d5fc11a0d9cd09b98ceb4ffa75dd97Owen Anderson if (!IT) break; 338753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner uint32_t BitWidth = IT->getBitWidth(); 339753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner APInt KnownZero(BitWidth, 0); 340753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner APInt KnownOne(BitWidth, 0); 34126c8dcc692fb2addd475446cfff24d6a4e958bcaRafael Espindola ComputeMaskedBits(II->getArgOperand(0), KnownZero, KnownOne); 342753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner unsigned LeadingZeros = KnownOne.countLeadingZeros(); 343753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner APInt Mask(APInt::getHighBitsSet(BitWidth, LeadingZeros)); 344753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner if ((Mask & KnownZero) == Mask) 345753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner return ReplaceInstUsesWith(CI, ConstantInt::get(IT, 346753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner APInt(BitWidth, LeadingZeros))); 34700e403abe384b8f61dd012242d3d81a23541ca25Jim Grosbach 348753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner } 349753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner break; 350753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner case Intrinsic::uadd_with_overflow: { 351cea7ac7c01c6a15eccb2cb7a181df1baf915de0dGabor Greif Value *LHS = II->getArgOperand(0), *RHS = II->getArgOperand(1); 352db125cfaf57cc83e7dd7453de2d509bc8efd0e5eChris Lattner IntegerType *IT = cast<IntegerType>(II->getArgOperand(0)->getType()); 353753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner uint32_t BitWidth = IT->getBitWidth(); 354753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner APInt LHSKnownZero(BitWidth, 0); 355753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner APInt LHSKnownOne(BitWidth, 0); 35626c8dcc692fb2addd475446cfff24d6a4e958bcaRafael Espindola ComputeMaskedBits(LHS, LHSKnownZero, LHSKnownOne); 357753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner bool LHSKnownNegative = LHSKnownOne[BitWidth - 1]; 358753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner bool LHSKnownPositive = LHSKnownZero[BitWidth - 1]; 359753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner 360753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner if (LHSKnownNegative || LHSKnownPositive) { 361753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner APInt RHSKnownZero(BitWidth, 0); 362753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner APInt RHSKnownOne(BitWidth, 0); 36326c8dcc692fb2addd475446cfff24d6a4e958bcaRafael Espindola ComputeMaskedBits(RHS, RHSKnownZero, RHSKnownOne); 364753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner bool RHSKnownNegative = RHSKnownOne[BitWidth - 1]; 365753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner bool RHSKnownPositive = RHSKnownZero[BitWidth - 1]; 366753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner if (LHSKnownNegative && RHSKnownNegative) { 367753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // The sign bit is set in both cases: this MUST overflow. 368753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // Create a simple add instruction, and insert it into the struct. 36959f15918c28ad340bb9f0ef78e43c2952a5b5c1cEli Friedman Value *Add = Builder->CreateAdd(LHS, RHS); 37059f15918c28ad340bb9f0ef78e43c2952a5b5c1cEli Friedman Add->takeName(&CI); 371753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner Constant *V[] = { 37259f15918c28ad340bb9f0ef78e43c2952a5b5c1cEli Friedman UndefValue::get(LHS->getType()), 37359f15918c28ad340bb9f0ef78e43c2952a5b5c1cEli Friedman ConstantInt::getTrue(II->getContext()) 374753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner }; 375db125cfaf57cc83e7dd7453de2d509bc8efd0e5eChris Lattner StructType *ST = cast<StructType>(II->getType()); 376b065b06c12dba6001b8140df2744d0c856ef6ea1Chris Lattner Constant *Struct = ConstantStruct::get(ST, V); 377753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner return InsertValueInst::Create(Struct, Add, 0); 378753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner } 37959f15918c28ad340bb9f0ef78e43c2952a5b5c1cEli Friedman 380753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner if (LHSKnownPositive && RHSKnownPositive) { 381753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // The sign bit is clear in both cases: this CANNOT overflow. 382753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // Create a simple add instruction, and insert it into the struct. 38359f15918c28ad340bb9f0ef78e43c2952a5b5c1cEli Friedman Value *Add = Builder->CreateNUWAdd(LHS, RHS); 38459f15918c28ad340bb9f0ef78e43c2952a5b5c1cEli Friedman Add->takeName(&CI); 385753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner Constant *V[] = { 386753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner UndefValue::get(LHS->getType()), 387753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner ConstantInt::getFalse(II->getContext()) 388753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner }; 389db125cfaf57cc83e7dd7453de2d509bc8efd0e5eChris Lattner StructType *ST = cast<StructType>(II->getType()); 390b065b06c12dba6001b8140df2744d0c856ef6ea1Chris Lattner Constant *Struct = ConstantStruct::get(ST, V); 391753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner return InsertValueInst::Create(Struct, Add, 0); 392753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner } 393753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner } 394753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner } 395753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // FALL THROUGH uadd into sadd 396753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner case Intrinsic::sadd_with_overflow: 397753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // Canonicalize constants into the RHS. 398a90c5c7605e0d8df96e61d4bf0cc47a7eaea92cfGabor Greif if (isa<Constant>(II->getArgOperand(0)) && 399a90c5c7605e0d8df96e61d4bf0cc47a7eaea92cfGabor Greif !isa<Constant>(II->getArgOperand(1))) { 400a90c5c7605e0d8df96e61d4bf0cc47a7eaea92cfGabor Greif Value *LHS = II->getArgOperand(0); 401a90c5c7605e0d8df96e61d4bf0cc47a7eaea92cfGabor Greif II->setArgOperand(0, II->getArgOperand(1)); 402a90c5c7605e0d8df96e61d4bf0cc47a7eaea92cfGabor Greif II->setArgOperand(1, LHS); 403753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner return II; 404753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner } 405753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner 406753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // X + undef -> undef 4079c68a7bb45ebf71cec5ab4eab7c73aacdfce16dfGabor Greif if (isa<UndefValue>(II->getArgOperand(1))) 408753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner return ReplaceInstUsesWith(CI, UndefValue::get(II->getType())); 40900e403abe384b8f61dd012242d3d81a23541ca25Jim Grosbach 4109c68a7bb45ebf71cec5ab4eab7c73aacdfce16dfGabor Greif if (ConstantInt *RHS = dyn_cast<ConstantInt>(II->getArgOperand(1))) { 411753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // X + 0 -> {X, false} 412753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner if (RHS->isZero()) { 413753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner Constant *V[] = { 4144fffb345ed20bd144a31c1c1724cffb6f519b814Eli Friedman UndefValue::get(II->getArgOperand(0)->getType()), 415753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner ConstantInt::getFalse(II->getContext()) 416753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner }; 417b065b06c12dba6001b8140df2744d0c856ef6ea1Chris Lattner Constant *Struct = 418b065b06c12dba6001b8140df2744d0c856ef6ea1Chris Lattner ConstantStruct::get(cast<StructType>(II->getType()), V); 419cea7ac7c01c6a15eccb2cb7a181df1baf915de0dGabor Greif return InsertValueInst::Create(Struct, II->getArgOperand(0), 0); 420753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner } 421753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner } 422753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner break; 423753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner case Intrinsic::usub_with_overflow: 424753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner case Intrinsic::ssub_with_overflow: 425753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // undef - X -> undef 426753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // X - undef -> undef 4279c68a7bb45ebf71cec5ab4eab7c73aacdfce16dfGabor Greif if (isa<UndefValue>(II->getArgOperand(0)) || 4289c68a7bb45ebf71cec5ab4eab7c73aacdfce16dfGabor Greif isa<UndefValue>(II->getArgOperand(1))) 429753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner return ReplaceInstUsesWith(CI, UndefValue::get(II->getType())); 43000e403abe384b8f61dd012242d3d81a23541ca25Jim Grosbach 4319c68a7bb45ebf71cec5ab4eab7c73aacdfce16dfGabor Greif if (ConstantInt *RHS = dyn_cast<ConstantInt>(II->getArgOperand(1))) { 432753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // X - 0 -> {X, false} 433753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner if (RHS->isZero()) { 434753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner Constant *V[] = { 4359c68a7bb45ebf71cec5ab4eab7c73aacdfce16dfGabor Greif UndefValue::get(II->getArgOperand(0)->getType()), 436753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner ConstantInt::getFalse(II->getContext()) 437753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner }; 43800e403abe384b8f61dd012242d3d81a23541ca25Jim Grosbach Constant *Struct = 439b065b06c12dba6001b8140df2744d0c856ef6ea1Chris Lattner ConstantStruct::get(cast<StructType>(II->getType()), V); 4409c68a7bb45ebf71cec5ab4eab7c73aacdfce16dfGabor Greif return InsertValueInst::Create(Struct, II->getArgOperand(0), 0); 441753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner } 442753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner } 443753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner break; 4446b96fe7e146f7eb594e67210c6bef511ad0a2058Benjamin Kramer case Intrinsic::umul_with_overflow: { 4456b96fe7e146f7eb594e67210c6bef511ad0a2058Benjamin Kramer Value *LHS = II->getArgOperand(0), *RHS = II->getArgOperand(1); 4466b96fe7e146f7eb594e67210c6bef511ad0a2058Benjamin Kramer unsigned BitWidth = cast<IntegerType>(LHS->getType())->getBitWidth(); 4476b96fe7e146f7eb594e67210c6bef511ad0a2058Benjamin Kramer 4486b96fe7e146f7eb594e67210c6bef511ad0a2058Benjamin Kramer APInt LHSKnownZero(BitWidth, 0); 4496b96fe7e146f7eb594e67210c6bef511ad0a2058Benjamin Kramer APInt LHSKnownOne(BitWidth, 0); 45026c8dcc692fb2addd475446cfff24d6a4e958bcaRafael Espindola ComputeMaskedBits(LHS, LHSKnownZero, LHSKnownOne); 4516b96fe7e146f7eb594e67210c6bef511ad0a2058Benjamin Kramer APInt RHSKnownZero(BitWidth, 0); 4526b96fe7e146f7eb594e67210c6bef511ad0a2058Benjamin Kramer APInt RHSKnownOne(BitWidth, 0); 45326c8dcc692fb2addd475446cfff24d6a4e958bcaRafael Espindola ComputeMaskedBits(RHS, RHSKnownZero, RHSKnownOne); 4546b96fe7e146f7eb594e67210c6bef511ad0a2058Benjamin Kramer 455d655e6e9dc0d21c3a2d76494dec255bb027572aeBenjamin Kramer // Get the largest possible values for each operand. 456d655e6e9dc0d21c3a2d76494dec255bb027572aeBenjamin Kramer APInt LHSMax = ~LHSKnownZero; 457d655e6e9dc0d21c3a2d76494dec255bb027572aeBenjamin Kramer APInt RHSMax = ~RHSKnownZero; 4586b96fe7e146f7eb594e67210c6bef511ad0a2058Benjamin Kramer 4596b96fe7e146f7eb594e67210c6bef511ad0a2058Benjamin Kramer // If multiplying the maximum values does not overflow then we can turn 4606b96fe7e146f7eb594e67210c6bef511ad0a2058Benjamin Kramer // this into a plain NUW mul. 461d655e6e9dc0d21c3a2d76494dec255bb027572aeBenjamin Kramer bool Overflow; 462d655e6e9dc0d21c3a2d76494dec255bb027572aeBenjamin Kramer LHSMax.umul_ov(RHSMax, Overflow); 463d655e6e9dc0d21c3a2d76494dec255bb027572aeBenjamin Kramer if (!Overflow) { 4646b96fe7e146f7eb594e67210c6bef511ad0a2058Benjamin Kramer Value *Mul = Builder->CreateNUWMul(LHS, RHS, "umul_with_overflow"); 4656b96fe7e146f7eb594e67210c6bef511ad0a2058Benjamin Kramer Constant *V[] = { 4666b96fe7e146f7eb594e67210c6bef511ad0a2058Benjamin Kramer UndefValue::get(LHS->getType()), 4676b96fe7e146f7eb594e67210c6bef511ad0a2058Benjamin Kramer Builder->getFalse() 4686b96fe7e146f7eb594e67210c6bef511ad0a2058Benjamin Kramer }; 469b065b06c12dba6001b8140df2744d0c856ef6ea1Chris Lattner Constant *Struct = ConstantStruct::get(cast<StructType>(II->getType()),V); 4706b96fe7e146f7eb594e67210c6bef511ad0a2058Benjamin Kramer return InsertValueInst::Create(Struct, Mul, 0); 4716b96fe7e146f7eb594e67210c6bef511ad0a2058Benjamin Kramer } 4726b96fe7e146f7eb594e67210c6bef511ad0a2058Benjamin Kramer } // FALL THROUGH 473753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner case Intrinsic::smul_with_overflow: 474753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // Canonicalize constants into the RHS. 475a90c5c7605e0d8df96e61d4bf0cc47a7eaea92cfGabor Greif if (isa<Constant>(II->getArgOperand(0)) && 476a90c5c7605e0d8df96e61d4bf0cc47a7eaea92cfGabor Greif !isa<Constant>(II->getArgOperand(1))) { 477a90c5c7605e0d8df96e61d4bf0cc47a7eaea92cfGabor Greif Value *LHS = II->getArgOperand(0); 478a90c5c7605e0d8df96e61d4bf0cc47a7eaea92cfGabor Greif II->setArgOperand(0, II->getArgOperand(1)); 479a90c5c7605e0d8df96e61d4bf0cc47a7eaea92cfGabor Greif II->setArgOperand(1, LHS); 480753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner return II; 481753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner } 482753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner 483753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // X * undef -> undef 4849c68a7bb45ebf71cec5ab4eab7c73aacdfce16dfGabor Greif if (isa<UndefValue>(II->getArgOperand(1))) 485753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner return ReplaceInstUsesWith(CI, UndefValue::get(II->getType())); 48600e403abe384b8f61dd012242d3d81a23541ca25Jim Grosbach 4879c68a7bb45ebf71cec5ab4eab7c73aacdfce16dfGabor Greif if (ConstantInt *RHSI = dyn_cast<ConstantInt>(II->getArgOperand(1))) { 488753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // X*0 -> {0, false} 489753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner if (RHSI->isZero()) 490753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner return ReplaceInstUsesWith(CI, Constant::getNullValue(II->getType())); 49100e403abe384b8f61dd012242d3d81a23541ca25Jim Grosbach 492753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // X * 1 -> {X, false} 493753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner if (RHSI->equalsInt(1)) { 494753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner Constant *V[] = { 495cea7ac7c01c6a15eccb2cb7a181df1baf915de0dGabor Greif UndefValue::get(II->getArgOperand(0)->getType()), 496753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner ConstantInt::getFalse(II->getContext()) 497753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner }; 49800e403abe384b8f61dd012242d3d81a23541ca25Jim Grosbach Constant *Struct = 499b065b06c12dba6001b8140df2744d0c856ef6ea1Chris Lattner ConstantStruct::get(cast<StructType>(II->getType()), V); 500cea7ac7c01c6a15eccb2cb7a181df1baf915de0dGabor Greif return InsertValueInst::Create(Struct, II->getArgOperand(0), 0); 501753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner } 502753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner } 503753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner break; 504753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner case Intrinsic::ppc_altivec_lvx: 505753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner case Intrinsic::ppc_altivec_lvxl: 506f93f7b2446bec3febc30b7136e18704664bd98ccBill Wendling // Turn PPC lvx -> load if the pointer is known aligned. 50736b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines if (getOrEnforceKnownAlignment(II->getArgOperand(0), 16, DL) >= 16) { 508cea7ac7c01c6a15eccb2cb7a181df1baf915de0dGabor Greif Value *Ptr = Builder->CreateBitCast(II->getArgOperand(0), 509753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner PointerType::getUnqual(II->getType())); 510753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner return new LoadInst(Ptr); 511753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner } 512753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner break; 513753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner case Intrinsic::ppc_altivec_stvx: 514753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner case Intrinsic::ppc_altivec_stvxl: 515753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // Turn stvx -> store if the pointer is known aligned. 51636b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines if (getOrEnforceKnownAlignment(II->getArgOperand(1), 16, DL) >= 16) { 51700e403abe384b8f61dd012242d3d81a23541ca25Jim Grosbach Type *OpPtrTy = 5182f1ab74e763ba7f10a058f62393d0987f6f7e298Gabor Greif PointerType::getUnqual(II->getArgOperand(0)->getType()); 5192f1ab74e763ba7f10a058f62393d0987f6f7e298Gabor Greif Value *Ptr = Builder->CreateBitCast(II->getArgOperand(1), OpPtrTy); 5202f1ab74e763ba7f10a058f62393d0987f6f7e298Gabor Greif return new StoreInst(II->getArgOperand(0), Ptr); 521753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner } 522753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner break; 523753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner case Intrinsic::x86_sse_storeu_ps: 524753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner case Intrinsic::x86_sse2_storeu_pd: 525753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner case Intrinsic::x86_sse2_storeu_dq: 526753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // Turn X86 storeu -> store if the pointer is known aligned. 52736b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines if (getOrEnforceKnownAlignment(II->getArgOperand(0), 16, DL) >= 16) { 52800e403abe384b8f61dd012242d3d81a23541ca25Jim Grosbach Type *OpPtrTy = 5292f1ab74e763ba7f10a058f62393d0987f6f7e298Gabor Greif PointerType::getUnqual(II->getArgOperand(1)->getType()); 5302f1ab74e763ba7f10a058f62393d0987f6f7e298Gabor Greif Value *Ptr = Builder->CreateBitCast(II->getArgOperand(0), OpPtrTy); 5312f1ab74e763ba7f10a058f62393d0987f6f7e298Gabor Greif return new StoreInst(II->getArgOperand(1), Ptr); 532753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner } 533753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner break; 5349cc9f50abc28f08fb6082b5ee4f5cc7e1af4969bChandler Carruth 5359cc9f50abc28f08fb6082b5ee4f5cc7e1af4969bChandler Carruth case Intrinsic::x86_sse_cvtss2si: 5369cc9f50abc28f08fb6082b5ee4f5cc7e1af4969bChandler Carruth case Intrinsic::x86_sse_cvtss2si64: 5379cc9f50abc28f08fb6082b5ee4f5cc7e1af4969bChandler Carruth case Intrinsic::x86_sse_cvttss2si: 5389cc9f50abc28f08fb6082b5ee4f5cc7e1af4969bChandler Carruth case Intrinsic::x86_sse_cvttss2si64: 5399cc9f50abc28f08fb6082b5ee4f5cc7e1af4969bChandler Carruth case Intrinsic::x86_sse2_cvtsd2si: 5409cc9f50abc28f08fb6082b5ee4f5cc7e1af4969bChandler Carruth case Intrinsic::x86_sse2_cvtsd2si64: 5419cc9f50abc28f08fb6082b5ee4f5cc7e1af4969bChandler Carruth case Intrinsic::x86_sse2_cvttsd2si: 5429cc9f50abc28f08fb6082b5ee4f5cc7e1af4969bChandler Carruth case Intrinsic::x86_sse2_cvttsd2si64: { 5439cc9f50abc28f08fb6082b5ee4f5cc7e1af4969bChandler Carruth // These intrinsics only demand the 0th element of their input vectors. If 544753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // we can simplify the input based on that, do so now. 545753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner unsigned VWidth = 5469c68a7bb45ebf71cec5ab4eab7c73aacdfce16dfGabor Greif cast<VectorType>(II->getArgOperand(0)->getType())->getNumElements(); 547753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner APInt DemandedElts(VWidth, 1); 548753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner APInt UndefElts(VWidth, 0); 549a399781289092fcdceb58b21174229f4373c4191Gabor Greif if (Value *V = SimplifyDemandedVectorElts(II->getArgOperand(0), 550a399781289092fcdceb58b21174229f4373c4191Gabor Greif DemandedElts, UndefElts)) { 551a90c5c7605e0d8df96e61d4bf0cc47a7eaea92cfGabor Greif II->setArgOperand(0, V); 552753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner return II; 553753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner } 554753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner break; 555753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner } 5569cc9f50abc28f08fb6082b5ee4f5cc7e1af4969bChandler Carruth 557ca1ef485854d668f794bf389154aa371aa2ed535Stuart Hastings 558ca1ef485854d668f794bf389154aa371aa2ed535Stuart Hastings case Intrinsic::x86_sse41_pmovsxbw: 559ca1ef485854d668f794bf389154aa371aa2ed535Stuart Hastings case Intrinsic::x86_sse41_pmovsxwd: 560ca1ef485854d668f794bf389154aa371aa2ed535Stuart Hastings case Intrinsic::x86_sse41_pmovsxdq: 561ca1ef485854d668f794bf389154aa371aa2ed535Stuart Hastings case Intrinsic::x86_sse41_pmovzxbw: 562ca1ef485854d668f794bf389154aa371aa2ed535Stuart Hastings case Intrinsic::x86_sse41_pmovzxwd: 563ca1ef485854d668f794bf389154aa371aa2ed535Stuart Hastings case Intrinsic::x86_sse41_pmovzxdq: { 564aaa7f499c1a2d46491a98d978ef45b0a06d73d31Evan Cheng // pmov{s|z}x ignores the upper half of their input vectors. 565ca1ef485854d668f794bf389154aa371aa2ed535Stuart Hastings unsigned VWidth = 566ca1ef485854d668f794bf389154aa371aa2ed535Stuart Hastings cast<VectorType>(II->getArgOperand(0)->getType())->getNumElements(); 567ca1ef485854d668f794bf389154aa371aa2ed535Stuart Hastings unsigned LowHalfElts = VWidth / 2; 568d116611e0a884e53ea1524de3a1306c1eb447228Stuart Hastings APInt InputDemandedElts(APInt::getBitsSet(VWidth, 0, LowHalfElts)); 569ca1ef485854d668f794bf389154aa371aa2ed535Stuart Hastings APInt UndefElts(VWidth, 0); 570ca1ef485854d668f794bf389154aa371aa2ed535Stuart Hastings if (Value *TmpV = SimplifyDemandedVectorElts(II->getArgOperand(0), 571ca1ef485854d668f794bf389154aa371aa2ed535Stuart Hastings InputDemandedElts, 572ca1ef485854d668f794bf389154aa371aa2ed535Stuart Hastings UndefElts)) { 573ca1ef485854d668f794bf389154aa371aa2ed535Stuart Hastings II->setArgOperand(0, TmpV); 574ca1ef485854d668f794bf389154aa371aa2ed535Stuart Hastings return II; 575ca1ef485854d668f794bf389154aa371aa2ed535Stuart Hastings } 576ca1ef485854d668f794bf389154aa371aa2ed535Stuart Hastings break; 577ca1ef485854d668f794bf389154aa371aa2ed535Stuart Hastings } 578ca1ef485854d668f794bf389154aa371aa2ed535Stuart Hastings 579753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner case Intrinsic::ppc_altivec_vperm: 580753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // Turn vperm(V1,V2,mask) -> shuffle(V1,V2,mask) if mask is a constant. 581a78fa8cc2dd6d2ffe5e4fe605f38aae7b3d2fb7aChris Lattner if (Constant *Mask = dyn_cast<Constant>(II->getArgOperand(2))) { 582a78fa8cc2dd6d2ffe5e4fe605f38aae7b3d2fb7aChris Lattner assert(Mask->getType()->getVectorNumElements() == 16 && 583a78fa8cc2dd6d2ffe5e4fe605f38aae7b3d2fb7aChris Lattner "Bad type for intrinsic!"); 58400e403abe384b8f61dd012242d3d81a23541ca25Jim Grosbach 585753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // Check that all of the elements are integer constants or undefs. 586753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner bool AllEltsOk = true; 587753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner for (unsigned i = 0; i != 16; ++i) { 588a78fa8cc2dd6d2ffe5e4fe605f38aae7b3d2fb7aChris Lattner Constant *Elt = Mask->getAggregateElement(i); 589a78fa8cc2dd6d2ffe5e4fe605f38aae7b3d2fb7aChris Lattner if (Elt == 0 || 590a78fa8cc2dd6d2ffe5e4fe605f38aae7b3d2fb7aChris Lattner !(isa<ConstantInt>(Elt) || isa<UndefValue>(Elt))) { 591753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner AllEltsOk = false; 592753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner break; 593753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner } 594753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner } 59500e403abe384b8f61dd012242d3d81a23541ca25Jim Grosbach 596753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner if (AllEltsOk) { 597753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // Cast the input vectors to byte vectors. 598a399781289092fcdceb58b21174229f4373c4191Gabor Greif Value *Op0 = Builder->CreateBitCast(II->getArgOperand(0), 599a399781289092fcdceb58b21174229f4373c4191Gabor Greif Mask->getType()); 600a399781289092fcdceb58b21174229f4373c4191Gabor Greif Value *Op1 = Builder->CreateBitCast(II->getArgOperand(1), 601a399781289092fcdceb58b21174229f4373c4191Gabor Greif Mask->getType()); 602753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner Value *Result = UndefValue::get(Op0->getType()); 60300e403abe384b8f61dd012242d3d81a23541ca25Jim Grosbach 604753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // Only extract each element once. 605753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner Value *ExtractedElts[32]; 606753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner memset(ExtractedElts, 0, sizeof(ExtractedElts)); 60700e403abe384b8f61dd012242d3d81a23541ca25Jim Grosbach 608753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner for (unsigned i = 0; i != 16; ++i) { 609a78fa8cc2dd6d2ffe5e4fe605f38aae7b3d2fb7aChris Lattner if (isa<UndefValue>(Mask->getAggregateElement(i))) 610753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner continue; 61100e403abe384b8f61dd012242d3d81a23541ca25Jim Grosbach unsigned Idx = 612a78fa8cc2dd6d2ffe5e4fe605f38aae7b3d2fb7aChris Lattner cast<ConstantInt>(Mask->getAggregateElement(i))->getZExtValue(); 613753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner Idx &= 31; // Match the hardware behavior. 61400e403abe384b8f61dd012242d3d81a23541ca25Jim Grosbach 615753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner if (ExtractedElts[Idx] == 0) { 61600e403abe384b8f61dd012242d3d81a23541ca25Jim Grosbach ExtractedElts[Idx] = 617a9390a4d5f5d568059a80970d22194b165d097a7Benjamin Kramer Builder->CreateExtractElement(Idx < 16 ? Op0 : Op1, 618a9390a4d5f5d568059a80970d22194b165d097a7Benjamin Kramer Builder->getInt32(Idx&15)); 619753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner } 62000e403abe384b8f61dd012242d3d81a23541ca25Jim Grosbach 621753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // Insert this value into the result vector. 622753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner Result = Builder->CreateInsertElement(Result, ExtractedElts[Idx], 623a9390a4d5f5d568059a80970d22194b165d097a7Benjamin Kramer Builder->getInt32(i)); 624753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner } 625753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner return CastInst::Create(Instruction::BitCast, Result, CI.getType()); 626753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner } 627753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner } 628753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner break; 629753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner 630364f17c47162a657bb0c3516588cdfc5297664f0Bob Wilson case Intrinsic::arm_neon_vld1: 631364f17c47162a657bb0c3516588cdfc5297664f0Bob Wilson case Intrinsic::arm_neon_vld2: 632364f17c47162a657bb0c3516588cdfc5297664f0Bob Wilson case Intrinsic::arm_neon_vld3: 633364f17c47162a657bb0c3516588cdfc5297664f0Bob Wilson case Intrinsic::arm_neon_vld4: 634364f17c47162a657bb0c3516588cdfc5297664f0Bob Wilson case Intrinsic::arm_neon_vld2lane: 635364f17c47162a657bb0c3516588cdfc5297664f0Bob Wilson case Intrinsic::arm_neon_vld3lane: 636364f17c47162a657bb0c3516588cdfc5297664f0Bob Wilson case Intrinsic::arm_neon_vld4lane: 637364f17c47162a657bb0c3516588cdfc5297664f0Bob Wilson case Intrinsic::arm_neon_vst1: 638364f17c47162a657bb0c3516588cdfc5297664f0Bob Wilson case Intrinsic::arm_neon_vst2: 639364f17c47162a657bb0c3516588cdfc5297664f0Bob Wilson case Intrinsic::arm_neon_vst3: 640364f17c47162a657bb0c3516588cdfc5297664f0Bob Wilson case Intrinsic::arm_neon_vst4: 641364f17c47162a657bb0c3516588cdfc5297664f0Bob Wilson case Intrinsic::arm_neon_vst2lane: 642364f17c47162a657bb0c3516588cdfc5297664f0Bob Wilson case Intrinsic::arm_neon_vst3lane: 643364f17c47162a657bb0c3516588cdfc5297664f0Bob Wilson case Intrinsic::arm_neon_vst4lane: { 64436b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines unsigned MemAlign = getKnownAlignment(II->getArgOperand(0), DL); 645364f17c47162a657bb0c3516588cdfc5297664f0Bob Wilson unsigned AlignArg = II->getNumArgOperands() - 1; 646364f17c47162a657bb0c3516588cdfc5297664f0Bob Wilson ConstantInt *IntrAlign = dyn_cast<ConstantInt>(II->getArgOperand(AlignArg)); 647364f17c47162a657bb0c3516588cdfc5297664f0Bob Wilson if (IntrAlign && IntrAlign->getZExtValue() < MemAlign) { 648364f17c47162a657bb0c3516588cdfc5297664f0Bob Wilson II->setArgOperand(AlignArg, 649364f17c47162a657bb0c3516588cdfc5297664f0Bob Wilson ConstantInt::get(Type::getInt32Ty(II->getContext()), 650364f17c47162a657bb0c3516588cdfc5297664f0Bob Wilson MemAlign, false)); 651364f17c47162a657bb0c3516588cdfc5297664f0Bob Wilson return II; 652364f17c47162a657bb0c3516588cdfc5297664f0Bob Wilson } 653364f17c47162a657bb0c3516588cdfc5297664f0Bob Wilson break; 654364f17c47162a657bb0c3516588cdfc5297664f0Bob Wilson } 655364f17c47162a657bb0c3516588cdfc5297664f0Bob Wilson 656973f72a29aeafb1fdc4f8dafc3f6c6651cbb0c99Lang Hames case Intrinsic::arm_neon_vmulls: 65736b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines case Intrinsic::arm_neon_vmullu: 65836b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines case Intrinsic::arm64_neon_smull: 65936b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines case Intrinsic::arm64_neon_umull: { 660973f72a29aeafb1fdc4f8dafc3f6c6651cbb0c99Lang Hames Value *Arg0 = II->getArgOperand(0); 661973f72a29aeafb1fdc4f8dafc3f6c6651cbb0c99Lang Hames Value *Arg1 = II->getArgOperand(1); 662973f72a29aeafb1fdc4f8dafc3f6c6651cbb0c99Lang Hames 663973f72a29aeafb1fdc4f8dafc3f6c6651cbb0c99Lang Hames // Handle mul by zero first: 664973f72a29aeafb1fdc4f8dafc3f6c6651cbb0c99Lang Hames if (isa<ConstantAggregateZero>(Arg0) || isa<ConstantAggregateZero>(Arg1)) { 665973f72a29aeafb1fdc4f8dafc3f6c6651cbb0c99Lang Hames return ReplaceInstUsesWith(CI, ConstantAggregateZero::get(II->getType())); 666973f72a29aeafb1fdc4f8dafc3f6c6651cbb0c99Lang Hames } 667973f72a29aeafb1fdc4f8dafc3f6c6651cbb0c99Lang Hames 668973f72a29aeafb1fdc4f8dafc3f6c6651cbb0c99Lang Hames // Check for constant LHS & RHS - in this case we just simplify. 66936b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines bool Zext = (II->getIntrinsicID() == Intrinsic::arm_neon_vmullu || 67036b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines II->getIntrinsicID() == Intrinsic::arm64_neon_umull); 671973f72a29aeafb1fdc4f8dafc3f6c6651cbb0c99Lang Hames VectorType *NewVT = cast<VectorType>(II->getType()); 67236b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines if (Constant *CV0 = dyn_cast<Constant>(Arg0)) { 67336b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines if (Constant *CV1 = dyn_cast<Constant>(Arg1)) { 67436b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines CV0 = ConstantExpr::getIntegerCast(CV0, NewVT, /*isSigned=*/!Zext); 67536b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines CV1 = ConstantExpr::getIntegerCast(CV1, NewVT, /*isSigned=*/!Zext); 67636b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines 67736b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines return ReplaceInstUsesWith(CI, ConstantExpr::getMul(CV0, CV1)); 678973f72a29aeafb1fdc4f8dafc3f6c6651cbb0c99Lang Hames } 679973f72a29aeafb1fdc4f8dafc3f6c6651cbb0c99Lang Hames 68036b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines // Couldn't simplify - canonicalize constant to the RHS. 681973f72a29aeafb1fdc4f8dafc3f6c6651cbb0c99Lang Hames std::swap(Arg0, Arg1); 682973f72a29aeafb1fdc4f8dafc3f6c6651cbb0c99Lang Hames } 683973f72a29aeafb1fdc4f8dafc3f6c6651cbb0c99Lang Hames 684973f72a29aeafb1fdc4f8dafc3f6c6651cbb0c99Lang Hames // Handle mul by one: 68536b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines if (Constant *CV1 = dyn_cast<Constant>(Arg1)) 686973f72a29aeafb1fdc4f8dafc3f6c6651cbb0c99Lang Hames if (ConstantInt *Splat = 68736b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines dyn_cast_or_null<ConstantInt>(CV1->getSplatValue())) 68836b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines if (Splat->isOne()) 68936b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines return CastInst::CreateIntegerCast(Arg0, II->getType(), 69036b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines /*isSigned=*/!Zext); 691973f72a29aeafb1fdc4f8dafc3f6c6651cbb0c99Lang Hames 692973f72a29aeafb1fdc4f8dafc3f6c6651cbb0c99Lang Hames break; 693973f72a29aeafb1fdc4f8dafc3f6c6651cbb0c99Lang Hames } 694973f72a29aeafb1fdc4f8dafc3f6c6651cbb0c99Lang Hames 695753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner case Intrinsic::stackrestore: { 696753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // If the save is right next to the restore, remove the restore. This can 697753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // happen when variable allocas are DCE'd. 698cea7ac7c01c6a15eccb2cb7a181df1baf915de0dGabor Greif if (IntrinsicInst *SS = dyn_cast<IntrinsicInst>(II->getArgOperand(0))) { 699753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner if (SS->getIntrinsicID() == Intrinsic::stacksave) { 700753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner BasicBlock::iterator BI = SS; 701753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner if (&*++BI == II) 702753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner return EraseInstFromFunction(CI); 703753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner } 704753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner } 70500e403abe384b8f61dd012242d3d81a23541ca25Jim Grosbach 706753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // Scan down this block to see if there is another stack restore in the 707753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // same block without an intervening call/alloca. 708753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner BasicBlock::iterator BI = II; 709753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner TerminatorInst *TI = II->getParent()->getTerminator(); 710753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner bool CannotRemove = false; 711753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner for (++BI; &*BI != TI; ++BI) { 7129e72a79ef4a9fcda482ce0b0e1f0bd6a4f16cffdNuno Lopes if (isa<AllocaInst>(BI)) { 713753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner CannotRemove = true; 714753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner break; 715753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner } 716753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner if (CallInst *BCI = dyn_cast<CallInst>(BI)) { 717753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner if (IntrinsicInst *II = dyn_cast<IntrinsicInst>(BCI)) { 718753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // If there is a stackrestore below this one, remove this one. 719753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner if (II->getIntrinsicID() == Intrinsic::stackrestore) 720753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner return EraseInstFromFunction(CI); 721753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // Otherwise, ignore the intrinsic. 722753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner } else { 723753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // If we found a non-intrinsic call, we can't remove the stack 724753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // restore. 725753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner CannotRemove = true; 726753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner break; 727753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner } 728753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner } 729753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner } 73000e403abe384b8f61dd012242d3d81a23541ca25Jim Grosbach 731dccc03b2423fe65efb5963ae816b99c24fc53374Bill Wendling // If the stack restore is in a return, resume, or unwind block and if there 732dccc03b2423fe65efb5963ae816b99c24fc53374Bill Wendling // are no allocas or calls between the restore and the return, nuke the 733dccc03b2423fe65efb5963ae816b99c24fc53374Bill Wendling // restore. 734aa5abe88d6aa445afa593476a665e3ab14b3524cBill Wendling if (!CannotRemove && (isa<ReturnInst>(TI) || isa<ResumeInst>(TI))) 735753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner return EraseInstFromFunction(CI); 736753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner break; 737753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner } 738753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner } 739753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner 740753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner return visitCallSite(II); 741753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner} 742753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner 743753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner// InvokeInst simplification 744753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner// 745753a2b464d0628231bd3dce645edd05dfbaa3a06Chris LattnerInstruction *InstCombiner::visitInvokeInst(InvokeInst &II) { 746753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner return visitCallSite(&II); 747753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner} 748753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner 74900e403abe384b8f61dd012242d3d81a23541ca25Jim Grosbach/// isSafeToEliminateVarargsCast - If this cast does not affect the value 750753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner/// passed through the varargs area, we can eliminate the use of the cast. 751753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattnerstatic bool isSafeToEliminateVarargsCast(const CallSite CS, 752753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner const CastInst * const CI, 75336b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines const DataLayout * const DL, 754753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner const int ix) { 755753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner if (!CI->isLosslessCast()) 756753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner return false; 757753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner 75836b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines // The size of ByVal or InAlloca arguments is derived from the type, so we 759753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // can't change to a type with a different size. If the size were 760753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // passed explicitly we could avoid this check. 76136b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines if (!CS.isByValOrInAllocaArgument(ix)) 762753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner return true; 763753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner 76400e403abe384b8f61dd012242d3d81a23541ca25Jim Grosbach Type* SrcTy = 765753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner cast<PointerType>(CI->getOperand(0)->getType())->getElementType(); 766db125cfaf57cc83e7dd7453de2d509bc8efd0e5eChris Lattner Type* DstTy = cast<PointerType>(CI->getType())->getElementType(); 767753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner if (!SrcTy->isSized() || !DstTy->isSized()) 768753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner return false; 76936b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines if (!DL || DL->getTypeAllocSize(SrcTy) != DL->getTypeAllocSize(DstTy)) 770753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner return false; 771753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner return true; 772753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner} 773753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner 77427ceaa13f820e33c44e29adc2095dd3e1e69d09fEric Christopher// Try to fold some different type of calls here. 77500e403abe384b8f61dd012242d3d81a23541ca25Jim Grosbach// Currently we're only working with the checking functions, memcpy_chk, 77627ceaa13f820e33c44e29adc2095dd3e1e69d09fEric Christopher// mempcpy_chk, memmove_chk, memset_chk, strcpy_chk, stpcpy_chk, strncpy_chk, 77727ceaa13f820e33c44e29adc2095dd3e1e69d09fEric Christopher// strcat_chk and strncat_chk. 77836b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen HinesInstruction *InstCombiner::tryOptimizeCall(CallInst *CI, const DataLayout *DL) { 77927ceaa13f820e33c44e29adc2095dd3e1e69d09fEric Christopher if (CI->getCalledFunction() == 0) return 0; 78027ceaa13f820e33c44e29adc2095dd3e1e69d09fEric Christopher 78163f932ca3c91ea8ac5b592158f5e8ef7de550547Meador Inge if (Value *With = Simplifier->optimizeCall(CI)) { 78263f932ca3c91ea8ac5b592158f5e8ef7de550547Meador Inge ++NumSimplified; 783a241b58f8d5d71eebfb2cb9be3689fe72b454474Meador Inge return CI->use_empty() ? CI : ReplaceInstUsesWith(*CI, With); 78463f932ca3c91ea8ac5b592158f5e8ef7de550547Meador Inge } 7855e8904576a5260cfd5b14596e338a4bb25b9817eMeador Inge 7865e8904576a5260cfd5b14596e338a4bb25b9817eMeador Inge return 0; 78727ceaa13f820e33c44e29adc2095dd3e1e69d09fEric Christopher} 78827ceaa13f820e33c44e29adc2095dd3e1e69d09fEric Christopher 7894a544a79bd735967f1d33fe675ae4566dbd17813Duncan Sandsstatic IntrinsicInst *FindInitTrampolineFromAlloca(Value *TrampMem) { 7904a544a79bd735967f1d33fe675ae4566dbd17813Duncan Sands // Strip off at most one level of pointer casts, looking for an alloca. This 7914a544a79bd735967f1d33fe675ae4566dbd17813Duncan Sands // is good enough in practice and simpler than handling any number of casts. 7924a544a79bd735967f1d33fe675ae4566dbd17813Duncan Sands Value *Underlying = TrampMem->stripPointerCasts(); 7934a544a79bd735967f1d33fe675ae4566dbd17813Duncan Sands if (Underlying != TrampMem && 79436b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines (!Underlying->hasOneUse() || Underlying->user_back() != TrampMem)) 7954a544a79bd735967f1d33fe675ae4566dbd17813Duncan Sands return 0; 7964a544a79bd735967f1d33fe675ae4566dbd17813Duncan Sands if (!isa<AllocaInst>(Underlying)) 7974a544a79bd735967f1d33fe675ae4566dbd17813Duncan Sands return 0; 7984a544a79bd735967f1d33fe675ae4566dbd17813Duncan Sands 7994a544a79bd735967f1d33fe675ae4566dbd17813Duncan Sands IntrinsicInst *InitTrampoline = 0; 80036b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines for (User *U : TrampMem->users()) { 80136b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines IntrinsicInst *II = dyn_cast<IntrinsicInst>(U); 8024a544a79bd735967f1d33fe675ae4566dbd17813Duncan Sands if (!II) 8034a544a79bd735967f1d33fe675ae4566dbd17813Duncan Sands return 0; 8044a544a79bd735967f1d33fe675ae4566dbd17813Duncan Sands if (II->getIntrinsicID() == Intrinsic::init_trampoline) { 8054a544a79bd735967f1d33fe675ae4566dbd17813Duncan Sands if (InitTrampoline) 8064a544a79bd735967f1d33fe675ae4566dbd17813Duncan Sands // More than one init_trampoline writes to this value. Give up. 8074a544a79bd735967f1d33fe675ae4566dbd17813Duncan Sands return 0; 8084a544a79bd735967f1d33fe675ae4566dbd17813Duncan Sands InitTrampoline = II; 8094a544a79bd735967f1d33fe675ae4566dbd17813Duncan Sands continue; 8104a544a79bd735967f1d33fe675ae4566dbd17813Duncan Sands } 8114a544a79bd735967f1d33fe675ae4566dbd17813Duncan Sands if (II->getIntrinsicID() == Intrinsic::adjust_trampoline) 8124a544a79bd735967f1d33fe675ae4566dbd17813Duncan Sands // Allow any number of calls to adjust.trampoline. 8134a544a79bd735967f1d33fe675ae4566dbd17813Duncan Sands continue; 8144a544a79bd735967f1d33fe675ae4566dbd17813Duncan Sands return 0; 8154a544a79bd735967f1d33fe675ae4566dbd17813Duncan Sands } 8164a544a79bd735967f1d33fe675ae4566dbd17813Duncan Sands 8174a544a79bd735967f1d33fe675ae4566dbd17813Duncan Sands // No call to init.trampoline found. 8184a544a79bd735967f1d33fe675ae4566dbd17813Duncan Sands if (!InitTrampoline) 8194a544a79bd735967f1d33fe675ae4566dbd17813Duncan Sands return 0; 8204a544a79bd735967f1d33fe675ae4566dbd17813Duncan Sands 8214a544a79bd735967f1d33fe675ae4566dbd17813Duncan Sands // Check that the alloca is being used in the expected way. 8224a544a79bd735967f1d33fe675ae4566dbd17813Duncan Sands if (InitTrampoline->getOperand(0) != TrampMem) 8234a544a79bd735967f1d33fe675ae4566dbd17813Duncan Sands return 0; 8244a544a79bd735967f1d33fe675ae4566dbd17813Duncan Sands 8254a544a79bd735967f1d33fe675ae4566dbd17813Duncan Sands return InitTrampoline; 8264a544a79bd735967f1d33fe675ae4566dbd17813Duncan Sands} 8274a544a79bd735967f1d33fe675ae4566dbd17813Duncan Sands 8284a544a79bd735967f1d33fe675ae4566dbd17813Duncan Sandsstatic IntrinsicInst *FindInitTrampolineFromBB(IntrinsicInst *AdjustTramp, 8294a544a79bd735967f1d33fe675ae4566dbd17813Duncan Sands Value *TrampMem) { 8304a544a79bd735967f1d33fe675ae4566dbd17813Duncan Sands // Visit all the previous instructions in the basic block, and try to find a 8314a544a79bd735967f1d33fe675ae4566dbd17813Duncan Sands // init.trampoline which has a direct path to the adjust.trampoline. 8324a544a79bd735967f1d33fe675ae4566dbd17813Duncan Sands for (BasicBlock::iterator I = AdjustTramp, 8334a544a79bd735967f1d33fe675ae4566dbd17813Duncan Sands E = AdjustTramp->getParent()->begin(); I != E; ) { 8344a544a79bd735967f1d33fe675ae4566dbd17813Duncan Sands Instruction *Inst = --I; 8354a544a79bd735967f1d33fe675ae4566dbd17813Duncan Sands if (IntrinsicInst *II = dyn_cast<IntrinsicInst>(I)) 8364a544a79bd735967f1d33fe675ae4566dbd17813Duncan Sands if (II->getIntrinsicID() == Intrinsic::init_trampoline && 8374a544a79bd735967f1d33fe675ae4566dbd17813Duncan Sands II->getOperand(0) == TrampMem) 8384a544a79bd735967f1d33fe675ae4566dbd17813Duncan Sands return II; 8394a544a79bd735967f1d33fe675ae4566dbd17813Duncan Sands if (Inst->mayWriteToMemory()) 8404a544a79bd735967f1d33fe675ae4566dbd17813Duncan Sands return 0; 8414a544a79bd735967f1d33fe675ae4566dbd17813Duncan Sands } 8424a544a79bd735967f1d33fe675ae4566dbd17813Duncan Sands return 0; 8434a544a79bd735967f1d33fe675ae4566dbd17813Duncan Sands} 8444a544a79bd735967f1d33fe675ae4566dbd17813Duncan Sands 8454a544a79bd735967f1d33fe675ae4566dbd17813Duncan Sands// Given a call to llvm.adjust.trampoline, find and return the corresponding 8464a544a79bd735967f1d33fe675ae4566dbd17813Duncan Sands// call to llvm.init.trampoline if the call to the trampoline can be optimized 8474a544a79bd735967f1d33fe675ae4566dbd17813Duncan Sands// to a direct call to a function. Otherwise return NULL. 8484a544a79bd735967f1d33fe675ae4566dbd17813Duncan Sands// 8494a544a79bd735967f1d33fe675ae4566dbd17813Duncan Sandsstatic IntrinsicInst *FindInitTrampoline(Value *Callee) { 8504a544a79bd735967f1d33fe675ae4566dbd17813Duncan Sands Callee = Callee->stripPointerCasts(); 8514a544a79bd735967f1d33fe675ae4566dbd17813Duncan Sands IntrinsicInst *AdjustTramp = dyn_cast<IntrinsicInst>(Callee); 8524a544a79bd735967f1d33fe675ae4566dbd17813Duncan Sands if (!AdjustTramp || 8534a544a79bd735967f1d33fe675ae4566dbd17813Duncan Sands AdjustTramp->getIntrinsicID() != Intrinsic::adjust_trampoline) 8544a544a79bd735967f1d33fe675ae4566dbd17813Duncan Sands return 0; 8554a544a79bd735967f1d33fe675ae4566dbd17813Duncan Sands 8564a544a79bd735967f1d33fe675ae4566dbd17813Duncan Sands Value *TrampMem = AdjustTramp->getOperand(0); 8574a544a79bd735967f1d33fe675ae4566dbd17813Duncan Sands 8584a544a79bd735967f1d33fe675ae4566dbd17813Duncan Sands if (IntrinsicInst *IT = FindInitTrampolineFromAlloca(TrampMem)) 8594a544a79bd735967f1d33fe675ae4566dbd17813Duncan Sands return IT; 8604a544a79bd735967f1d33fe675ae4566dbd17813Duncan Sands if (IntrinsicInst *IT = FindInitTrampolineFromBB(AdjustTramp, TrampMem)) 8614a544a79bd735967f1d33fe675ae4566dbd17813Duncan Sands return IT; 8624a544a79bd735967f1d33fe675ae4566dbd17813Duncan Sands return 0; 8634a544a79bd735967f1d33fe675ae4566dbd17813Duncan Sands} 8644a544a79bd735967f1d33fe675ae4566dbd17813Duncan Sands 865753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner// visitCallSite - Improvements for call and invoke instructions. 866753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner// 867753a2b464d0628231bd3dce645edd05dfbaa3a06Chris LattnerInstruction *InstCombiner::visitCallSite(CallSite CS) { 8688e0d1c03ca7fd86e6879b4e37d0d7f0e982feef6Benjamin Kramer if (isAllocLikeFn(CS.getInstruction(), TLI)) 86978f8ef42173a3a9867ed789073d4ddc652fb7ff2Nuno Lopes return visitAllocSite(*CS.getInstruction()); 8702b3e9580536dfb5666b9d91e99baebf6d45bfa5fNuno Lopes 871753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner bool Changed = false; 872753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner 873ab215bc371677cdeac6eacb3e890e5af666d1ab4Chris Lattner // If the callee is a pointer to a function, attempt to move any casts to the 874ab215bc371677cdeac6eacb3e890e5af666d1ab4Chris Lattner // arguments of the call/invoke. 875753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner Value *Callee = CS.getCalledValue(); 876ab215bc371677cdeac6eacb3e890e5af666d1ab4Chris Lattner if (!isa<Function>(Callee) && transformConstExprCastCall(CS)) 877ab215bc371677cdeac6eacb3e890e5af666d1ab4Chris Lattner return 0; 878753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner 879753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner if (Function *CalleeF = dyn_cast<Function>(Callee)) 880d569561835b0fa4dbbb0fca1b1f0a8de6c01439aChris Lattner // If the call and callee calling conventions don't match, this call must 881d569561835b0fa4dbbb0fca1b1f0a8de6c01439aChris Lattner // be unreachable, as the call is undefined. 882d569561835b0fa4dbbb0fca1b1f0a8de6c01439aChris Lattner if (CalleeF->getCallingConv() != CS.getCallingConv() && 883d569561835b0fa4dbbb0fca1b1f0a8de6c01439aChris Lattner // Only do this for calls to a function with a body. A prototype may 884d569561835b0fa4dbbb0fca1b1f0a8de6c01439aChris Lattner // not actually end up matching the implementation's calling conv for a 885d569561835b0fa4dbbb0fca1b1f0a8de6c01439aChris Lattner // variety of reasons (e.g. it may be written in assembly). 886d569561835b0fa4dbbb0fca1b1f0a8de6c01439aChris Lattner !CalleeF->isDeclaration()) { 887753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner Instruction *OldCall = CS.getInstruction(); 888753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner new StoreInst(ConstantInt::getTrue(Callee->getContext()), 88900e403abe384b8f61dd012242d3d81a23541ca25Jim Grosbach UndefValue::get(Type::getInt1PtrTy(Callee->getContext())), 890753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner OldCall); 8910fabd08066a29f4e5060539d0d0605cbfe2760b8Chad Rosier // If OldCall does not return void then replaceAllUsesWith undef. 892753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // This allows ValueHandlers and custom metadata to adjust itself. 893753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner if (!OldCall->getType()->isVoidTy()) 8943e22cb9ec30cd9b1be9b0f50e400f512124997e5Eli Friedman ReplaceInstUsesWith(*OldCall, UndefValue::get(OldCall->getType())); 895830f3f205d8a77acbf8838fe78c2c733ca924d9cChris Lattner if (isa<CallInst>(OldCall)) 896753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner return EraseInstFromFunction(*OldCall); 89700e403abe384b8f61dd012242d3d81a23541ca25Jim Grosbach 898830f3f205d8a77acbf8838fe78c2c733ca924d9cChris Lattner // We cannot remove an invoke, because it would change the CFG, just 899830f3f205d8a77acbf8838fe78c2c733ca924d9cChris Lattner // change the callee to a null pointer. 900654c06f6457f80428e40810ad251c412462731e4Gabor Greif cast<InvokeInst>(OldCall)->setCalledFunction( 901830f3f205d8a77acbf8838fe78c2c733ca924d9cChris Lattner Constant::getNullValue(CalleeF->getType())); 902753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner return 0; 903753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner } 904753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner 905753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner if (isa<ConstantPointerNull>(Callee) || isa<UndefValue>(Callee)) { 906cea7ac7c01c6a15eccb2cb7a181df1baf915de0dGabor Greif // If CS does not return void then replaceAllUsesWith undef. 907753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // This allows ValueHandlers and custom metadata to adjust itself. 908753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner if (!CS.getInstruction()->getType()->isVoidTy()) 9093e22cb9ec30cd9b1be9b0f50e400f512124997e5Eli Friedman ReplaceInstUsesWith(*CS.getInstruction(), 9103e22cb9ec30cd9b1be9b0f50e400f512124997e5Eli Friedman UndefValue::get(CS.getInstruction()->getType())); 911753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner 912f1fb6c836940d1b92c0e3df27f4c9ca6569ff968Nuno Lopes if (isa<InvokeInst>(CS.getInstruction())) { 913f1fb6c836940d1b92c0e3df27f4c9ca6569ff968Nuno Lopes // Can't remove an invoke because we cannot change the CFG. 914f1fb6c836940d1b92c0e3df27f4c9ca6569ff968Nuno Lopes return 0; 915753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner } 916f1fb6c836940d1b92c0e3df27f4c9ca6569ff968Nuno Lopes 917f1fb6c836940d1b92c0e3df27f4c9ca6569ff968Nuno Lopes // This instruction is not reachable, just remove it. We insert a store to 918f1fb6c836940d1b92c0e3df27f4c9ca6569ff968Nuno Lopes // undef so that we know that this code is not reachable, despite the fact 919f1fb6c836940d1b92c0e3df27f4c9ca6569ff968Nuno Lopes // that we can't modify the CFG here. 920f1fb6c836940d1b92c0e3df27f4c9ca6569ff968Nuno Lopes new StoreInst(ConstantInt::getTrue(Callee->getContext()), 921f1fb6c836940d1b92c0e3df27f4c9ca6569ff968Nuno Lopes UndefValue::get(Type::getInt1PtrTy(Callee->getContext())), 922f1fb6c836940d1b92c0e3df27f4c9ca6569ff968Nuno Lopes CS.getInstruction()); 923f1fb6c836940d1b92c0e3df27f4c9ca6569ff968Nuno Lopes 924753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner return EraseInstFromFunction(*CS.getInstruction()); 925753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner } 926753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner 9274a544a79bd735967f1d33fe675ae4566dbd17813Duncan Sands if (IntrinsicInst *II = FindInitTrampoline(Callee)) 9284a544a79bd735967f1d33fe675ae4566dbd17813Duncan Sands return transformCallThroughTrampoline(CS, II); 929753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner 930db125cfaf57cc83e7dd7453de2d509bc8efd0e5eChris Lattner PointerType *PTy = cast<PointerType>(Callee->getType()); 931db125cfaf57cc83e7dd7453de2d509bc8efd0e5eChris Lattner FunctionType *FTy = cast<FunctionType>(PTy->getElementType()); 932753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner if (FTy->isVarArg()) { 933ba78c883d4c89bd807fa7ebea7ac6f22f3503223Eli Friedman int ix = FTy->getNumParams(); 934753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // See if we can optimize any arguments passed through the varargs area of 935753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // the call. 9361bde770ccd35b27e0421e54fcdde1f33cdba0f7aMatt Arsenault for (CallSite::arg_iterator I = CS.arg_begin() + FTy->getNumParams(), 937753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner E = CS.arg_end(); I != E; ++I, ++ix) { 938753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner CastInst *CI = dyn_cast<CastInst>(*I); 93936b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines if (CI && isSafeToEliminateVarargsCast(CS, CI, DL, ix)) { 940753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner *I = CI->getOperand(0); 941753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner Changed = true; 942753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner } 943753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner } 944753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner } 945753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner 946753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner if (isa<InlineAsm>(Callee) && !CS.doesNotThrow()) { 947753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // Inline asm calls cannot throw - mark them 'nounwind'. 948753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner CS.setDoesNotThrow(); 949753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner Changed = true; 950753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner } 951753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner 9523574eca1b02600bac4e625297f4ecf745f4c4f32Micah Villmow // Try to optimize the call if possible, we require DataLayout for most of 95327ceaa13f820e33c44e29adc2095dd3e1e69d09fEric Christopher // this. None of these calls are seen as possibly dead so go ahead and 95427ceaa13f820e33c44e29adc2095dd3e1e69d09fEric Christopher // delete the instruction now. 95527ceaa13f820e33c44e29adc2095dd3e1e69d09fEric Christopher if (CallInst *CI = dyn_cast<CallInst>(CS.getInstruction())) { 95636b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines Instruction *I = tryOptimizeCall(CI, DL); 9577b323a34fa034389e9e439f6c02eeb73e87ab9dbEric Christopher // If we changed something return the result, etc. Otherwise let 9587b323a34fa034389e9e439f6c02eeb73e87ab9dbEric Christopher // the fallthrough check. 9597b323a34fa034389e9e439f6c02eeb73e87ab9dbEric Christopher if (I) return EraseInstFromFunction(*I); 96027ceaa13f820e33c44e29adc2095dd3e1e69d09fEric Christopher } 96127ceaa13f820e33c44e29adc2095dd3e1e69d09fEric Christopher 962753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner return Changed ? CS.getInstruction() : 0; 963753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner} 964753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner 965753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner// transformConstExprCastCall - If the callee is a constexpr cast of a function, 966753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner// attempt to move the cast to the arguments of the call/invoke. 967753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner// 968753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattnerbool InstCombiner::transformConstExprCastCall(CallSite CS) { 969ab215bc371677cdeac6eacb3e890e5af666d1ab4Chris Lattner Function *Callee = 970ab215bc371677cdeac6eacb3e890e5af666d1ab4Chris Lattner dyn_cast<Function>(CS.getCalledValue()->stripPointerCasts()); 971ab215bc371677cdeac6eacb3e890e5af666d1ab4Chris Lattner if (Callee == 0) 972753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner return false; 973753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner Instruction *Caller = CS.getInstruction(); 97499faa3b4ec6d03ac7808fe4ff3fbf3d04e375502Bill Wendling const AttributeSet &CallerPAL = CS.getAttributes(); 975753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner 976753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // Okay, this is a cast from a function to a different type. Unless doing so 977753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // would cause a type conversion of one of our arguments, change this call to 978753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // be a direct call with arguments casted to the appropriate types. 979753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // 980db125cfaf57cc83e7dd7453de2d509bc8efd0e5eChris Lattner FunctionType *FT = Callee->getFunctionType(); 981db125cfaf57cc83e7dd7453de2d509bc8efd0e5eChris Lattner Type *OldRetTy = Caller->getType(); 982db125cfaf57cc83e7dd7453de2d509bc8efd0e5eChris Lattner Type *NewRetTy = FT->getReturnType(); 983753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner 984753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // Check to see if we are changing the return type... 985753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner if (OldRetTy != NewRetTy) { 98636b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines 98736b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines if (NewRetTy->isStructTy()) 98836b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines return false; // TODO: Handle multiple return values. 98936b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines 9903e1c40de7f33db639698982bb58d8c2c8d7d5780Matt Arsenault if (!CastInst::isBitCastable(NewRetTy, OldRetTy)) { 9913e1c40de7f33db639698982bb58d8c2c8d7d5780Matt Arsenault if (Callee->isDeclaration()) 9923e1c40de7f33db639698982bb58d8c2c8d7d5780Matt Arsenault return false; // Cannot transform this return value. 993753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner 9943e1c40de7f33db639698982bb58d8c2c8d7d5780Matt Arsenault if (!Caller->use_empty() && 9953e1c40de7f33db639698982bb58d8c2c8d7d5780Matt Arsenault // void -> non-void is handled specially 9963e1c40de7f33db639698982bb58d8c2c8d7d5780Matt Arsenault !NewRetTy->isVoidTy()) 997753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner return false; // Cannot transform this return value. 9983e1c40de7f33db639698982bb58d8c2c8d7d5780Matt Arsenault } 999753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner 1000753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner if (!CallerPAL.isEmpty() && !Caller->use_empty()) { 10011b0c54f1c5dd61e56cb7cbc435fcb3319cff628fBill Wendling AttrBuilder RAttrs(CallerPAL, AttributeSet::ReturnIndex); 1002e74365462a39529ae48ef4d34ec76b4543b8ea29Bill Wendling if (RAttrs. 1003e74365462a39529ae48ef4d34ec76b4543b8ea29Bill Wendling hasAttributes(AttributeFuncs:: 1004e74365462a39529ae48ef4d34ec76b4543b8ea29Bill Wendling typeIncompatible(NewRetTy, AttributeSet::ReturnIndex), 1005e74365462a39529ae48ef4d34ec76b4543b8ea29Bill Wendling AttributeSet::ReturnIndex)) 1006753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner return false; // Attribute not compatible with transformed value. 1007753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner } 1008753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner 1009753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // If the callsite is an invoke instruction, and the return value is used by 1010753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // a PHI node in a successor, we cannot change the return type of the call 1011753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // because there is no place to put the cast instruction (without breaking 1012753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // the critical edge). Bail out in this case. 1013753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner if (!Caller->use_empty()) 1014753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner if (InvokeInst *II = dyn_cast<InvokeInst>(Caller)) 101536b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines for (User *U : II->users()) 101636b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines if (PHINode *PN = dyn_cast<PHINode>(U)) 1017753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner if (PN->getParent() == II->getNormalDest() || 1018753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner PN->getParent() == II->getUnwindDest()) 1019753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner return false; 1020753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner } 1021753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner 10221bde770ccd35b27e0421e54fcdde1f33cdba0f7aMatt Arsenault unsigned NumActualArgs = CS.arg_size(); 1023753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner unsigned NumCommonArgs = std::min(FT->getNumParams(), NumActualArgs); 1024753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner 1025753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner CallSite::arg_iterator AI = CS.arg_begin(); 1026753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner for (unsigned i = 0, e = NumCommonArgs; i != e; ++i, ++AI) { 1027db125cfaf57cc83e7dd7453de2d509bc8efd0e5eChris Lattner Type *ParamTy = FT->getParamType(i); 1028db125cfaf57cc83e7dd7453de2d509bc8efd0e5eChris Lattner Type *ActTy = (*AI)->getType(); 1029753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner 10303e1c40de7f33db639698982bb58d8c2c8d7d5780Matt Arsenault if (!CastInst::isBitCastable(ActTy, ParamTy)) 1031753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner return false; // Cannot transform this parameter value. 1032753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner 103328d65722d6f283b327b5815914382077fe9c0ab4Bill Wendling if (AttrBuilder(CallerPAL.getParamAttributes(i + 1), i + 1). 1034e74365462a39529ae48ef4d34ec76b4543b8ea29Bill Wendling hasAttributes(AttributeFuncs:: 1035e74365462a39529ae48ef4d34ec76b4543b8ea29Bill Wendling typeIncompatible(ParamTy, i + 1), i + 1)) 1036753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner return false; // Attribute not compatible with transformed value. 103700e403abe384b8f61dd012242d3d81a23541ca25Jim Grosbach 103836b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines if (CS.isInAllocaArgument(i)) 103936b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines return false; // Cannot transform to and from inalloca. 104036b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines 10412b9375e44b0e99ce23d2cef8de78f66347eef88aChris Lattner // If the parameter is passed as a byval argument, then we have to have a 10422b9375e44b0e99ce23d2cef8de78f66347eef88aChris Lattner // sized type and the sized type has to have the same size as the old type. 104328d65722d6f283b327b5815914382077fe9c0ab4Bill Wendling if (ParamTy != ActTy && 104428d65722d6f283b327b5815914382077fe9c0ab4Bill Wendling CallerPAL.getParamAttributes(i + 1).hasAttribute(i + 1, 104528d65722d6f283b327b5815914382077fe9c0ab4Bill Wendling Attribute::ByVal)) { 1046db125cfaf57cc83e7dd7453de2d509bc8efd0e5eChris Lattner PointerType *ParamPTy = dyn_cast<PointerType>(ParamTy); 104736b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines if (ParamPTy == 0 || !ParamPTy->getElementType()->isSized() || DL == 0) 10482b9375e44b0e99ce23d2cef8de78f66347eef88aChris Lattner return false; 104900e403abe384b8f61dd012242d3d81a23541ca25Jim Grosbach 1050b060a46b0de75d6ab711b60d123ab42a9a6d7b3cMatt Arsenault Type *CurElTy = ActTy->getPointerElementType(); 105136b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines if (DL->getTypeAllocSize(CurElTy) != 105236b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines DL->getTypeAllocSize(ParamPTy->getElementType())) 10532b9375e44b0e99ce23d2cef8de78f66347eef88aChris Lattner return false; 10542b9375e44b0e99ce23d2cef8de78f66347eef88aChris Lattner } 1055753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner } 1056753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner 1057091b1e3c74fee17e33aa87478ab07bfbba0a2f78Chris Lattner if (Callee->isDeclaration()) { 1058091b1e3c74fee17e33aa87478ab07bfbba0a2f78Chris Lattner // Do not delete arguments unless we have a function body. 1059091b1e3c74fee17e33aa87478ab07bfbba0a2f78Chris Lattner if (FT->getNumParams() < NumActualArgs && !FT->isVarArg()) 1060091b1e3c74fee17e33aa87478ab07bfbba0a2f78Chris Lattner return false; 1061091b1e3c74fee17e33aa87478ab07bfbba0a2f78Chris Lattner 1062091b1e3c74fee17e33aa87478ab07bfbba0a2f78Chris Lattner // If the callee is just a declaration, don't change the varargsness of the 1063091b1e3c74fee17e33aa87478ab07bfbba0a2f78Chris Lattner // call. We don't want to introduce a varargs call where one doesn't 1064091b1e3c74fee17e33aa87478ab07bfbba0a2f78Chris Lattner // already exist. 1065db125cfaf57cc83e7dd7453de2d509bc8efd0e5eChris Lattner PointerType *APTy = cast<PointerType>(CS.getCalledValue()->getType()); 1066091b1e3c74fee17e33aa87478ab07bfbba0a2f78Chris Lattner if (FT->isVarArg()!=cast<FunctionType>(APTy->getElementType())->isVarArg()) 1067091b1e3c74fee17e33aa87478ab07bfbba0a2f78Chris Lattner return false; 1068f374486659822e93054363bef05e781acee16f3bJim Grosbach 1069f374486659822e93054363bef05e781acee16f3bJim Grosbach // If both the callee and the cast type are varargs, we still have to make 1070f374486659822e93054363bef05e781acee16f3bJim Grosbach // sure the number of fixed parameters are the same or we have the same 1071f374486659822e93054363bef05e781acee16f3bJim Grosbach // ABI issues as if we introduce a varargs call. 1072871a2051f7d49827259d719a97b8cc86163edbd9Jim Grosbach if (FT->isVarArg() && 1073871a2051f7d49827259d719a97b8cc86163edbd9Jim Grosbach cast<FunctionType>(APTy->getElementType())->isVarArg() && 1074871a2051f7d49827259d719a97b8cc86163edbd9Jim Grosbach FT->getNumParams() != 1075f374486659822e93054363bef05e781acee16f3bJim Grosbach cast<FunctionType>(APTy->getElementType())->getNumParams()) 1076f374486659822e93054363bef05e781acee16f3bJim Grosbach return false; 1077091b1e3c74fee17e33aa87478ab07bfbba0a2f78Chris Lattner } 107800e403abe384b8f61dd012242d3d81a23541ca25Jim Grosbach 1079d5917f0b4d8f87985bfdf130c269e1929d0085d1Jim Grosbach if (FT->getNumParams() < NumActualArgs && FT->isVarArg() && 1080d5917f0b4d8f87985bfdf130c269e1929d0085d1Jim Grosbach !CallerPAL.isEmpty()) 1081d5917f0b4d8f87985bfdf130c269e1929d0085d1Jim Grosbach // In this case we have more arguments than the new function type, but we 1082d5917f0b4d8f87985bfdf130c269e1929d0085d1Jim Grosbach // won't be dropping them. Check that these extra arguments have attributes 1083d5917f0b4d8f87985bfdf130c269e1929d0085d1Jim Grosbach // that are compatible with being a vararg call argument. 1084d5917f0b4d8f87985bfdf130c269e1929d0085d1Jim Grosbach for (unsigned i = CallerPAL.getNumSlots(); i; --i) { 10858e47daf2858e980210f3e1f007036b24da342c29Bill Wendling unsigned Index = CallerPAL.getSlotIndex(i - 1); 10868e47daf2858e980210f3e1f007036b24da342c29Bill Wendling if (Index <= FT->getNumParams()) 1087d5917f0b4d8f87985bfdf130c269e1929d0085d1Jim Grosbach break; 10888e47daf2858e980210f3e1f007036b24da342c29Bill Wendling 10891d3dcfe4246b4d45fa78a8dfd0a11c7fff842c15Bill Wendling // Check if it has an attribute that's incompatible with varargs. 10908e47daf2858e980210f3e1f007036b24da342c29Bill Wendling AttributeSet PAttrs = CallerPAL.getSlotAttributes(i - 1); 10918e47daf2858e980210f3e1f007036b24da342c29Bill Wendling if (PAttrs.hasAttribute(Index, Attribute::StructRet)) 1092d5917f0b4d8f87985bfdf130c269e1929d0085d1Jim Grosbach return false; 1093d5917f0b4d8f87985bfdf130c269e1929d0085d1Jim Grosbach } 1094753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner 109500e403abe384b8f61dd012242d3d81a23541ca25Jim Grosbach 1096753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // Okay, we decided that this is a safe thing to do: go ahead and start 1097091b1e3c74fee17e33aa87478ab07bfbba0a2f78Chris Lattner // inserting cast instructions as necessary. 1098753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner std::vector<Value*> Args; 1099753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner Args.reserve(NumActualArgs); 1100ac90696722bef3993e5fb9f72a6fa4209bbc8763Bill Wendling SmallVector<AttributeSet, 8> attrVec; 1101753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner attrVec.reserve(NumCommonArgs); 1102753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner 1103753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // Get any return attributes. 11041b0c54f1c5dd61e56cb7cbc435fcb3319cff628fBill Wendling AttrBuilder RAttrs(CallerPAL, AttributeSet::ReturnIndex); 1105753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner 1106753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // If the return value is not being used, the type may not be compatible 1107753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // with the existing attributes. Wipe out any problematic attributes. 1108e74365462a39529ae48ef4d34ec76b4543b8ea29Bill Wendling RAttrs. 1109e74365462a39529ae48ef4d34ec76b4543b8ea29Bill Wendling removeAttributes(AttributeFuncs:: 1110e74365462a39529ae48ef4d34ec76b4543b8ea29Bill Wendling typeIncompatible(NewRetTy, AttributeSet::ReturnIndex), 1111e74365462a39529ae48ef4d34ec76b4543b8ea29Bill Wendling AttributeSet::ReturnIndex); 1112753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner 1113753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // Add the new return attributes. 11148831c0605bbc0c82ce56c2fb85bd681d1c013925Bill Wendling if (RAttrs.hasAttributes()) 1115ac90696722bef3993e5fb9f72a6fa4209bbc8763Bill Wendling attrVec.push_back(AttributeSet::get(Caller->getContext(), 1116ac90696722bef3993e5fb9f72a6fa4209bbc8763Bill Wendling AttributeSet::ReturnIndex, RAttrs)); 1117753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner 1118753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner AI = CS.arg_begin(); 1119753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner for (unsigned i = 0; i != NumCommonArgs; ++i, ++AI) { 1120db125cfaf57cc83e7dd7453de2d509bc8efd0e5eChris Lattner Type *ParamTy = FT->getParamType(i); 1121f34dc428fa577d6d5d71ab3a1f9765b4e5da5a4fMatt Arsenault 1122753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner if ((*AI)->getType() == ParamTy) { 1123753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner Args.push_back(*AI); 1124753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner } else { 1125f34dc428fa577d6d5d71ab3a1f9765b4e5da5a4fMatt Arsenault Args.push_back(Builder->CreateBitCast(*AI, ParamTy)); 1126753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner } 1127753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner 1128753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // Add any parameter attributes. 112928d65722d6f283b327b5815914382077fe9c0ab4Bill Wendling AttrBuilder PAttrs(CallerPAL.getParamAttributes(i + 1), i + 1); 11307be7848e17f60825f5fbc177b8a25909a30ddb00Bill Wendling if (PAttrs.hasAttributes()) 1131ac90696722bef3993e5fb9f72a6fa4209bbc8763Bill Wendling attrVec.push_back(AttributeSet::get(Caller->getContext(), i + 1, 1132ac90696722bef3993e5fb9f72a6fa4209bbc8763Bill Wendling PAttrs)); 1133753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner } 1134753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner 1135753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // If the function takes more arguments than the call was taking, add them 1136753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // now. 1137753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner for (unsigned i = NumCommonArgs; i != FT->getNumParams(); ++i) 1138753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner Args.push_back(Constant::getNullValue(FT->getParamType(i))); 1139753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner 1140753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // If we are removing arguments to the function, emit an obnoxious warning. 1141753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner if (FT->getNumParams() < NumActualArgs) { 11421dec62ed43fef82b1cafbcc1fc3d63cacd90cad9Nick Lewycky // TODO: if (!FT->isVarArg()) this call may be unreachable. PR14722 11431dec62ed43fef82b1cafbcc1fc3d63cacd90cad9Nick Lewycky if (FT->isVarArg()) { 1144753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // Add all of the arguments in their promoted form to the arg list. 1145753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner for (unsigned i = FT->getNumParams(); i != NumActualArgs; ++i, ++AI) { 1146db125cfaf57cc83e7dd7453de2d509bc8efd0e5eChris Lattner Type *PTy = getPromotedType((*AI)->getType()); 1147753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner if (PTy != (*AI)->getType()) { 1148753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // Must promote to pass through va_arg area! 1149753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner Instruction::CastOps opcode = 1150753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner CastInst::getCastOpcode(*AI, false, PTy, false); 1151a9390a4d5f5d568059a80970d22194b165d097a7Benjamin Kramer Args.push_back(Builder->CreateCast(opcode, *AI, PTy)); 1152753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner } else { 1153753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner Args.push_back(*AI); 1154753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner } 1155753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner 1156753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // Add any parameter attributes. 115728d65722d6f283b327b5815914382077fe9c0ab4Bill Wendling AttrBuilder PAttrs(CallerPAL.getParamAttributes(i + 1), i + 1); 11587be7848e17f60825f5fbc177b8a25909a30ddb00Bill Wendling if (PAttrs.hasAttributes()) 1159ac90696722bef3993e5fb9f72a6fa4209bbc8763Bill Wendling attrVec.push_back(AttributeSet::get(FT->getContext(), i + 1, 1160ac90696722bef3993e5fb9f72a6fa4209bbc8763Bill Wendling PAttrs)); 1161753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner } 1162753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner } 1163753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner } 1164753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner 1165c5f1bc88a2eb7ad9ff924ca90cf88494e5f947b9Bill Wendling AttributeSet FnAttrs = CallerPAL.getFnAttributes(); 1166956f13440a4aa0297606a4412f4aa091d931592aBill Wendling if (CallerPAL.hasAttributes(AttributeSet::FunctionIndex)) 1167ac90696722bef3993e5fb9f72a6fa4209bbc8763Bill Wendling attrVec.push_back(AttributeSet::get(Callee->getContext(), FnAttrs)); 1168753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner 1169753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner if (NewRetTy->isVoidTy()) 1170753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner Caller->setName(""); // Void type should not have a name. 1171753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner 117299faa3b4ec6d03ac7808fe4ff3fbf3d04e375502Bill Wendling const AttributeSet &NewCallerPAL = AttributeSet::get(Callee->getContext(), 1173c5f1bc88a2eb7ad9ff924ca90cf88494e5f947b9Bill Wendling attrVec); 1174753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner 1175753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner Instruction *NC; 1176753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner if (InvokeInst *II = dyn_cast<InvokeInst>(Caller)) { 1177ef819d0ed8c9df3da633e8c1240e582a7879bb94Eli Friedman NC = Builder->CreateInvoke(Callee, II->getNormalDest(), 1178a3efbb15ddd5aa9006564cd79086723640084878Jay Foad II->getUnwindDest(), Args); 1179ef819d0ed8c9df3da633e8c1240e582a7879bb94Eli Friedman NC->takeName(II); 1180753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner cast<InvokeInst>(NC)->setCallingConv(II->getCallingConv()); 1181753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner cast<InvokeInst>(NC)->setAttributes(NewCallerPAL); 1182753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner } else { 1183753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner CallInst *CI = cast<CallInst>(Caller); 1184a3efbb15ddd5aa9006564cd79086723640084878Jay Foad NC = Builder->CreateCall(Callee, Args); 1185ef819d0ed8c9df3da633e8c1240e582a7879bb94Eli Friedman NC->takeName(CI); 1186753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner if (CI->isTailCall()) 1187753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner cast<CallInst>(NC)->setTailCall(); 1188753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner cast<CallInst>(NC)->setCallingConv(CI->getCallingConv()); 1189753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner cast<CallInst>(NC)->setAttributes(NewCallerPAL); 1190753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner } 1191753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner 1192753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // Insert a cast of the return type as necessary. 1193753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner Value *NV = NC; 1194753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner if (OldRetTy != NV->getType() && !Caller->use_empty()) { 1195753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner if (!NV->getType()->isVoidTy()) { 1196f34dc428fa577d6d5d71ab3a1f9765b4e5da5a4fMatt Arsenault NV = NC = CastInst::Create(CastInst::BitCast, NC, OldRetTy); 1197a311c34d2af7c750f016ef5e4c41bee77a1dfac7Eli Friedman NC->setDebugLoc(Caller->getDebugLoc()); 1198753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner 1199753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // If this is an invoke instruction, we should insert it after the first 1200753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // non-phi, instruction in the normal successor block. 1201753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner if (InvokeInst *II = dyn_cast<InvokeInst>(Caller)) { 120289d4411cef736898047aa7e3bc159da39cacf8e6Bill Wendling BasicBlock::iterator I = II->getNormalDest()->getFirstInsertionPt(); 1203753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner InsertNewInstBefore(NC, *I); 1204753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner } else { 1205ab215bc371677cdeac6eacb3e890e5af666d1ab4Chris Lattner // Otherwise, it's a call, just insert cast right after the call. 1206753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner InsertNewInstBefore(NC, *Caller); 1207753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner } 1208753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner Worklist.AddUsersToWorkList(*Caller); 1209753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner } else { 1210753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner NV = UndefValue::get(Caller->getType()); 1211753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner } 1212753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner } 1213753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner 1214753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner if (!Caller->use_empty()) 12153e22cb9ec30cd9b1be9b0f50e400f512124997e5Eli Friedman ReplaceInstUsesWith(*Caller, NV); 121636b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines else if (Caller->hasValueHandle()) 121736b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines ValueHandleBase::ValueIsRAUWd(Caller, NV); 12183e22cb9ec30cd9b1be9b0f50e400f512124997e5Eli Friedman 1219753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner EraseInstFromFunction(*Caller); 1220753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner return true; 1221753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner} 1222753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner 12234a544a79bd735967f1d33fe675ae4566dbd17813Duncan Sands// transformCallThroughTrampoline - Turn a call to a function created by 12244a544a79bd735967f1d33fe675ae4566dbd17813Duncan Sands// init_trampoline / adjust_trampoline intrinsic pair into a direct call to the 12254a544a79bd735967f1d33fe675ae4566dbd17813Duncan Sands// underlying function. 1226753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner// 12274a544a79bd735967f1d33fe675ae4566dbd17813Duncan SandsInstruction * 12284a544a79bd735967f1d33fe675ae4566dbd17813Duncan SandsInstCombiner::transformCallThroughTrampoline(CallSite CS, 12294a544a79bd735967f1d33fe675ae4566dbd17813Duncan Sands IntrinsicInst *Tramp) { 1230753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner Value *Callee = CS.getCalledValue(); 1231db125cfaf57cc83e7dd7453de2d509bc8efd0e5eChris Lattner PointerType *PTy = cast<PointerType>(Callee->getType()); 1232db125cfaf57cc83e7dd7453de2d509bc8efd0e5eChris Lattner FunctionType *FTy = cast<FunctionType>(PTy->getElementType()); 123399faa3b4ec6d03ac7808fe4ff3fbf3d04e375502Bill Wendling const AttributeSet &Attrs = CS.getAttributes(); 1234753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner 1235753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // If the call already has the 'nest' attribute somewhere then give up - 1236753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // otherwise 'nest' would occur twice after splicing in the chain. 12379d30e7208e6b2bc3fa48305e3ae371188f643425Bill Wendling if (Attrs.hasAttrSomewhere(Attribute::Nest)) 12389d30e7208e6b2bc3fa48305e3ae371188f643425Bill Wendling return 0; 1239753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner 12404a544a79bd735967f1d33fe675ae4566dbd17813Duncan Sands assert(Tramp && 12414a544a79bd735967f1d33fe675ae4566dbd17813Duncan Sands "transformCallThroughTrampoline called with incorrect CallSite."); 1242753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner 1243a399781289092fcdceb58b21174229f4373c4191Gabor Greif Function *NestF =cast<Function>(Tramp->getArgOperand(1)->stripPointerCasts()); 1244db125cfaf57cc83e7dd7453de2d509bc8efd0e5eChris Lattner PointerType *NestFPTy = cast<PointerType>(NestF->getType()); 1245db125cfaf57cc83e7dd7453de2d509bc8efd0e5eChris Lattner FunctionType *NestFTy = cast<FunctionType>(NestFPTy->getElementType()); 1246753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner 124799faa3b4ec6d03ac7808fe4ff3fbf3d04e375502Bill Wendling const AttributeSet &NestAttrs = NestF->getAttributes(); 1248753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner if (!NestAttrs.isEmpty()) { 1249753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner unsigned NestIdx = 1; 12505fdd6c8793462549e3593890ec61573da06e3346Jay Foad Type *NestTy = 0; 125128d65722d6f283b327b5815914382077fe9c0ab4Bill Wendling AttributeSet NestAttr; 1252753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner 1253753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // Look for a parameter marked with the 'nest' attribute. 1254753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner for (FunctionType::param_iterator I = NestFTy->param_begin(), 1255753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner E = NestFTy->param_end(); I != E; ++NestIdx, ++I) 125628d65722d6f283b327b5815914382077fe9c0ab4Bill Wendling if (NestAttrs.hasAttribute(NestIdx, Attribute::Nest)) { 1257753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // Record the parameter type and any other attributes. 1258753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner NestTy = *I; 1259753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner NestAttr = NestAttrs.getParamAttributes(NestIdx); 1260753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner break; 1261753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner } 1262753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner 1263753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner if (NestTy) { 1264753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner Instruction *Caller = CS.getInstruction(); 1265753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner std::vector<Value*> NewArgs; 12661bde770ccd35b27e0421e54fcdde1f33cdba0f7aMatt Arsenault NewArgs.reserve(CS.arg_size() + 1); 1267753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner 1268ac90696722bef3993e5fb9f72a6fa4209bbc8763Bill Wendling SmallVector<AttributeSet, 8> NewAttrs; 1269753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner NewAttrs.reserve(Attrs.getNumSlots() + 1); 1270753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner 1271753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // Insert the nest argument into the call argument list, which may 1272753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // mean appending it. Likewise for attributes. 1273753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner 1274753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // Add any result attributes. 12751b0c54f1c5dd61e56cb7cbc435fcb3319cff628fBill Wendling if (Attrs.hasAttributes(AttributeSet::ReturnIndex)) 1276ac90696722bef3993e5fb9f72a6fa4209bbc8763Bill Wendling NewAttrs.push_back(AttributeSet::get(Caller->getContext(), 1277ac90696722bef3993e5fb9f72a6fa4209bbc8763Bill Wendling Attrs.getRetAttributes())); 1278753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner 1279753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner { 1280753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner unsigned Idx = 1; 1281753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner CallSite::arg_iterator I = CS.arg_begin(), E = CS.arg_end(); 1282753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner do { 1283753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner if (Idx == NestIdx) { 1284753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // Add the chain argument and attributes. 1285cea7ac7c01c6a15eccb2cb7a181df1baf915de0dGabor Greif Value *NestVal = Tramp->getArgOperand(2); 1286753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner if (NestVal->getType() != NestTy) 1287e6f364b6c44eda14cd4ad54366ea5cc7246b9500Eli Friedman NestVal = Builder->CreateBitCast(NestVal, NestTy, "nest"); 1288753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner NewArgs.push_back(NestVal); 1289ac90696722bef3993e5fb9f72a6fa4209bbc8763Bill Wendling NewAttrs.push_back(AttributeSet::get(Caller->getContext(), 1290ac90696722bef3993e5fb9f72a6fa4209bbc8763Bill Wendling NestAttr)); 1291753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner } 1292753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner 1293753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner if (I == E) 1294753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner break; 1295753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner 1296753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // Add the original argument and attributes. 1297753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner NewArgs.push_back(*I); 129828d65722d6f283b327b5815914382077fe9c0ab4Bill Wendling AttributeSet Attr = Attrs.getParamAttributes(Idx); 129928d65722d6f283b327b5815914382077fe9c0ab4Bill Wendling if (Attr.hasAttributes(Idx)) { 1300ac90696722bef3993e5fb9f72a6fa4209bbc8763Bill Wendling AttrBuilder B(Attr, Idx); 1301ac90696722bef3993e5fb9f72a6fa4209bbc8763Bill Wendling NewAttrs.push_back(AttributeSet::get(Caller->getContext(), 1302ac90696722bef3993e5fb9f72a6fa4209bbc8763Bill Wendling Idx + (Idx >= NestIdx), B)); 130328d65722d6f283b327b5815914382077fe9c0ab4Bill Wendling } 1304753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner 1305753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner ++Idx, ++I; 1306753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner } while (1); 1307753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner } 1308753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner 1309753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // Add any function attributes. 1310956f13440a4aa0297606a4412f4aa091d931592aBill Wendling if (Attrs.hasAttributes(AttributeSet::FunctionIndex)) 1311ac90696722bef3993e5fb9f72a6fa4209bbc8763Bill Wendling NewAttrs.push_back(AttributeSet::get(FTy->getContext(), 1312ac90696722bef3993e5fb9f72a6fa4209bbc8763Bill Wendling Attrs.getFnAttributes())); 1313753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner 1314753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // The trampoline may have been bitcast to a bogus type (FTy). 1315753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // Handle this by synthesizing a new function type, equal to FTy 1316753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // with the chain parameter inserted. 1317753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner 13185fdd6c8793462549e3593890ec61573da06e3346Jay Foad std::vector<Type*> NewTypes; 1319753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner NewTypes.reserve(FTy->getNumParams()+1); 1320753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner 1321753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // Insert the chain's type into the list of parameter types, which may 1322753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // mean appending it. 1323753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner { 1324753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner unsigned Idx = 1; 1325753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner FunctionType::param_iterator I = FTy->param_begin(), 1326753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner E = FTy->param_end(); 1327753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner 1328753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner do { 1329753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner if (Idx == NestIdx) 1330753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // Add the chain's type. 1331753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner NewTypes.push_back(NestTy); 1332753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner 1333753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner if (I == E) 1334753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner break; 1335753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner 1336753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // Add the original type. 1337753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner NewTypes.push_back(*I); 1338753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner 1339753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner ++Idx, ++I; 1340753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner } while (1); 1341753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner } 1342753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner 1343753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // Replace the trampoline call with a direct call. Let the generic 1344753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // code sort out any function type mismatches. 134500e403abe384b8f61dd012242d3d81a23541ca25Jim Grosbach FunctionType *NewFTy = FunctionType::get(FTy->getReturnType(), NewTypes, 1346753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner FTy->isVarArg()); 1347753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner Constant *NewCallee = 1348753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner NestF->getType() == PointerType::getUnqual(NewFTy) ? 134900e403abe384b8f61dd012242d3d81a23541ca25Jim Grosbach NestF : ConstantExpr::getBitCast(NestF, 1350753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner PointerType::getUnqual(NewFTy)); 135103fceff6f69a0261a767aab8e62de8aa9301b86cJim Grosbach const AttributeSet &NewPAL = 135203fceff6f69a0261a767aab8e62de8aa9301b86cJim Grosbach AttributeSet::get(FTy->getContext(), NewAttrs); 1353753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner 1354753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner Instruction *NewCaller; 1355753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner if (InvokeInst *II = dyn_cast<InvokeInst>(Caller)) { 1356753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner NewCaller = InvokeInst::Create(NewCallee, 1357753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner II->getNormalDest(), II->getUnwindDest(), 1358a3efbb15ddd5aa9006564cd79086723640084878Jay Foad NewArgs); 1359753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner cast<InvokeInst>(NewCaller)->setCallingConv(II->getCallingConv()); 1360753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner cast<InvokeInst>(NewCaller)->setAttributes(NewPAL); 1361753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner } else { 1362a3efbb15ddd5aa9006564cd79086723640084878Jay Foad NewCaller = CallInst::Create(NewCallee, NewArgs); 1363753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner if (cast<CallInst>(Caller)->isTailCall()) 1364753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner cast<CallInst>(NewCaller)->setTailCall(); 1365753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner cast<CallInst>(NewCaller)-> 1366753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner setCallingConv(cast<CallInst>(Caller)->getCallingConv()); 1367753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner cast<CallInst>(NewCaller)->setAttributes(NewPAL); 1368753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner } 136959f15918c28ad340bb9f0ef78e43c2952a5b5c1cEli Friedman 137059f15918c28ad340bb9f0ef78e43c2952a5b5c1cEli Friedman return NewCaller; 1371753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner } 1372753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner } 1373753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner 1374753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // Replace the trampoline call with a direct call. Since there is no 'nest' 1375753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // parameter, there is no need to adjust the argument list. Let the generic 1376753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner // code sort out any function type mismatches. 1377753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner Constant *NewCallee = 137800e403abe384b8f61dd012242d3d81a23541ca25Jim Grosbach NestF->getType() == PTy ? NestF : 1379753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner ConstantExpr::getBitCast(NestF, PTy); 1380753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner CS.setCalledFunction(NewCallee); 1381753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner return CS.getInstruction(); 1382753a2b464d0628231bd3dce645edd05dfbaa3a06Chris Lattner} 1383