diff options
Diffstat (limited to 'lib/Transforms/Scalar/SimplifyLibCalls.cpp')
| -rw-r--r-- | lib/Transforms/Scalar/SimplifyLibCalls.cpp | 1044 |
1 files changed, 536 insertions, 508 deletions
diff --git a/lib/Transforms/Scalar/SimplifyLibCalls.cpp b/lib/Transforms/Scalar/SimplifyLibCalls.cpp index ec48469..e1866015 100644 --- a/lib/Transforms/Scalar/SimplifyLibCalls.cpp +++ b/lib/Transforms/Scalar/SimplifyLibCalls.cpp @@ -9,11 +9,9 @@ // // This file implements a simple pass that applies a variety of small // optimizations for calls to specific well-known function calls (e.g. runtime -// library functions). For example, a call to the function "exit(3)" that -// occurs within the main() function can be transformed into a simple "return 3" -// instruction. Any optimization that takes this form (replace call to library -// function with simpler code that provides the same result) belongs in this -// file. +// library functions). Any optimization that takes the very simple form +// "replace call to library function with simpler code that provides the same +// result" belongs in this file. // //===----------------------------------------------------------------------===// @@ -29,8 +27,9 @@ #include "llvm/ADT/SmallPtrSet.h" #include "llvm/ADT/StringMap.h" #include "llvm/ADT/Statistic.h" -#include "llvm/Support/Compiler.h" +#include "llvm/ADT/STLExtras.h" #include "llvm/Support/Debug.h" +#include "llvm/Support/raw_ostream.h" #include "llvm/Config/config.h" using namespace llvm; @@ -44,7 +43,7 @@ STATISTIC(NumAnnotated, "Number of attributes added to library functions"); /// This class is the abstract base class for the set of optimizations that /// corresponds to one library call. namespace { -class VISIBILITY_HIDDEN LibCallOptimization { +class LibCallOptimization { protected: Function *Caller; const TargetData *TD; @@ -58,14 +57,14 @@ public: /// performed. If it returns CI, then it transformed the call and CI is to be /// deleted. If it returns something else, replace CI with the new value and /// delete CI. - virtual Value *CallOptimizer(Function *Callee, CallInst *CI, IRBuilder<> &B) + virtual Value *CallOptimizer(Function *Callee, CallInst *CI, IRBuilder<> &B) =0; - - Value *OptimizeCall(CallInst *CI, const TargetData &TD, IRBuilder<> &B) { + + Value *OptimizeCall(CallInst *CI, const TargetData *TD, IRBuilder<> &B) { Caller = CI->getParent()->getParent(); - this->TD = &TD; + this->TD = TD; if (CI->getCalledFunction()) - Context = CI->getCalledFunction()->getContext(); + Context = &CI->getCalledFunction()->getContext(); return CallOptimizer(CI->getCalledFunction(), CI, B); } @@ -76,12 +75,12 @@ public: /// specified pointer. Ptr is required to be some pointer type, and the /// return value has 'intptr_t' type. Value *EmitStrLen(Value *Ptr, IRBuilder<> &B); - + /// EmitMemCpy - Emit a call to the memcpy function to the builder. This /// always expects that the size has type 'intptr_t' and Dst/Src are pointers. - Value *EmitMemCpy(Value *Dst, Value *Src, Value *Len, + Value *EmitMemCpy(Value *Dst, Value *Src, Value *Len, unsigned Align, IRBuilder<> &B); - + /// EmitMemChr - Emit a call to the memchr function. This assumes that Ptr is /// a pointer, Val is an i32 value, and Len is an 'intptr_t' value. Value *EmitMemChr(Value *Ptr, Value *Val, Value *Len, IRBuilder<> &B); @@ -96,35 +95,36 @@ public: /// 'floor'). This function is known to take a single of type matching 'Op' /// and returns one value with the same type. If 'Op' is a long double, 'l' /// is added as the suffix of name, if 'Op' is a float, we add a 'f' suffix. - Value *EmitUnaryFloatFnCall(Value *Op, const char *Name, IRBuilder<> &B); - + Value *EmitUnaryFloatFnCall(Value *Op, const char *Name, IRBuilder<> &B, + const AttrListPtr &Attrs); + /// EmitPutChar - Emit a call to the putchar function. This assumes that Char /// is an integer. void EmitPutChar(Value *Char, IRBuilder<> &B); - + /// EmitPutS - Emit a call to the puts function. This assumes that Str is /// some pointer. void EmitPutS(Value *Str, IRBuilder<> &B); - + /// EmitFPutC - Emit a call to the fputc function. This assumes that Char is /// an i32, and File is a pointer to FILE. void EmitFPutC(Value *Char, Value *File, IRBuilder<> &B); - + /// EmitFPutS - Emit a call to the puts function. Str is required to be a /// pointer and File is a pointer to FILE. void EmitFPutS(Value *Str, Value *File, IRBuilder<> &B); - + /// EmitFWrite - Emit a call to the fwrite function. This assumes that Ptr is /// a pointer, Size is an 'intptr_t', and File is a pointer to FILE. void EmitFWrite(Value *Ptr, Value *Size, Value *File, IRBuilder<> &B); - + }; } // End anonymous namespace. /// CastToCStr - Return V if it is an i8*, otherwise cast it to i8*. Value *LibCallOptimization::CastToCStr(Value *V, IRBuilder<> &B) { return - B.CreateBitCast(V, Context->getPointerTypeUnqual(Type::Int8Ty), "cstr"); + B.CreateBitCast(V, Type::getInt8PtrTy(*Context), "cstr"); } /// EmitStrLen - Emit a call to the strlen function to the builder, for the @@ -137,8 +137,8 @@ Value *LibCallOptimization::EmitStrLen(Value *Ptr, IRBuilder<> &B) { Attribute::NoUnwind); Constant *StrLen =M->getOrInsertFunction("strlen", AttrListPtr::get(AWI, 2), - TD->getIntPtrType(), - Context->getPointerTypeUnqual(Type::Int8Ty), + TD->getIntPtrType(*Context), + Type::getInt8PtrTy(*Context), NULL); CallInst *CI = B.CreateCall(StrLen, CastToCStr(Ptr, B), "strlen"); if (const Function *F = dyn_cast<Function>(StrLen->stripPointerCasts())) @@ -157,7 +157,7 @@ Value *LibCallOptimization::EmitMemCpy(Value *Dst, Value *Src, Value *Len, Tys[0] = Len->getType(); Value *MemCpy = Intrinsic::getDeclaration(M, IID, Tys, 1); return B.CreateCall4(MemCpy, CastToCStr(Dst, B), CastToCStr(Src, B), Len, - Context->getConstantInt(Type::Int32Ty, Align)); + ConstantInt::get(Type::getInt32Ty(*Context), Align)); } /// EmitMemChr - Emit a call to the memchr function. This assumes that Ptr is @@ -169,9 +169,10 @@ Value *LibCallOptimization::EmitMemChr(Value *Ptr, Value *Val, AWI = AttributeWithIndex::get(~0u, Attribute::ReadOnly | Attribute::NoUnwind); Value *MemChr = M->getOrInsertFunction("memchr", AttrListPtr::get(&AWI, 1), - Context->getPointerTypeUnqual(Type::Int8Ty), - Context->getPointerTypeUnqual(Type::Int8Ty), - Type::Int32Ty, TD->getIntPtrType(), + Type::getInt8PtrTy(*Context), + Type::getInt8PtrTy(*Context), + Type::getInt32Ty(*Context), + TD->getIntPtrType(*Context), NULL); CallInst *CI = B.CreateCall3(MemChr, CastToCStr(Ptr, B), Val, Len, "memchr"); @@ -192,10 +193,10 @@ Value *LibCallOptimization::EmitMemCmp(Value *Ptr1, Value *Ptr2, Attribute::NoUnwind); Value *MemCmp = M->getOrInsertFunction("memcmp", AttrListPtr::get(AWI, 3), - Type::Int32Ty, - Context->getPointerTypeUnqual(Type::Int8Ty), - Context->getPointerTypeUnqual(Type::Int8Ty), - TD->getIntPtrType(), NULL); + Type::getInt32Ty(*Context), + Type::getInt8PtrTy(*Context), + Type::getInt8PtrTy(*Context), + TD->getIntPtrType(*Context), NULL); CallInst *CI = B.CreateCall3(MemCmp, CastToCStr(Ptr1, B), CastToCStr(Ptr2, B), Len, "memcmp"); @@ -213,7 +214,7 @@ Value *LibCallOptimization::EmitMemSet(Value *Dst, Value *Val, const Type *Tys[1]; Tys[0] = Len->getType(); Value *MemSet = Intrinsic::getDeclaration(M, IID, Tys, 1); - Value *Align = Context->getConstantInt(Type::Int32Ty, 1); + Value *Align = ConstantInt::get(Type::getInt32Ty(*Context), 1); return B.CreateCall4(MemSet, CastToCStr(Dst, B), Val, Len, Align); } @@ -222,14 +223,15 @@ Value *LibCallOptimization::EmitMemSet(Value *Dst, Value *Val, /// returns one value with the same type. If 'Op' is a long double, 'l' is /// added as the suffix of name, if 'Op' is a float, we add a 'f' suffix. Value *LibCallOptimization::EmitUnaryFloatFnCall(Value *Op, const char *Name, - IRBuilder<> &B) { + IRBuilder<> &B, + const AttrListPtr &Attrs) { char NameBuffer[20]; - if (Op->getType() != Type::DoubleTy) { + if (!Op->getType()->isDoubleTy()) { // If we need to add a suffix, copy into NameBuffer. unsigned NameLen = strlen(Name); assert(NameLen < sizeof(NameBuffer)-2); memcpy(NameBuffer, Name, NameLen); - if (Op->getType() == Type::FloatTy) + if (Op->getType()->isFloatTy()) NameBuffer[NameLen] = 'f'; // floorf else NameBuffer[NameLen] = 'l'; // floorl @@ -241,7 +243,7 @@ Value *LibCallOptimization::EmitUnaryFloatFnCall(Value *Op, const char *Name, Value *Callee = M->getOrInsertFunction(Name, Op->getType(), Op->getType(), NULL); CallInst *CI = B.CreateCall(Callee, Op, Name); - + CI->setAttributes(Attrs); if (const Function *F = dyn_cast<Function>(Callee->stripPointerCasts())) CI->setCallingConv(F->getCallingConv()); @@ -252,10 +254,12 @@ Value *LibCallOptimization::EmitUnaryFloatFnCall(Value *Op, const char *Name, /// is an integer. void LibCallOptimization::EmitPutChar(Value *Char, IRBuilder<> &B) { Module *M = Caller->getParent(); - Value *PutChar = M->getOrInsertFunction("putchar", Type::Int32Ty, - Type::Int32Ty, NULL); + Value *PutChar = M->getOrInsertFunction("putchar", Type::getInt32Ty(*Context), + Type::getInt32Ty(*Context), NULL); CallInst *CI = B.CreateCall(PutChar, - B.CreateIntCast(Char, Type::Int32Ty, "chari"), + B.CreateIntCast(Char, + Type::getInt32Ty(*Context), + "chari"), "putchar"); if (const Function *F = dyn_cast<Function>(PutChar->stripPointerCasts())) @@ -271,8 +275,8 @@ void LibCallOptimization::EmitPutS(Value *Str, IRBuilder<> &B) { AWI[1] = AttributeWithIndex::get(~0u, Attribute::NoUnwind); Value *PutS = M->getOrInsertFunction("puts", AttrListPtr::get(AWI, 2), - Type::Int32Ty, - Context->getPointerTypeUnqual(Type::Int8Ty), + Type::getInt32Ty(*Context), + Type::getInt8PtrTy(*Context), NULL); CallInst *CI = B.CreateCall(PutS, CastToCStr(Str, B), "puts"); if (const Function *F = dyn_cast<Function>(PutS->stripPointerCasts())) @@ -289,12 +293,16 @@ void LibCallOptimization::EmitFPutC(Value *Char, Value *File, IRBuilder<> &B) { AWI[1] = AttributeWithIndex::get(~0u, Attribute::NoUnwind); Constant *F; if (isa<PointerType>(File->getType())) - F = M->getOrInsertFunction("fputc", AttrListPtr::get(AWI, 2), Type::Int32Ty, - Type::Int32Ty, File->getType(), NULL); + F = M->getOrInsertFunction("fputc", AttrListPtr::get(AWI, 2), + Type::getInt32Ty(*Context), + Type::getInt32Ty(*Context), File->getType(), + NULL); else - F = M->getOrInsertFunction("fputc", Type::Int32Ty, Type::Int32Ty, + F = M->getOrInsertFunction("fputc", + Type::getInt32Ty(*Context), + Type::getInt32Ty(*Context), File->getType(), NULL); - Char = B.CreateIntCast(Char, Type::Int32Ty, "chari"); + Char = B.CreateIntCast(Char, Type::getInt32Ty(*Context), "chari"); CallInst *CI = B.CreateCall2(F, Char, File, "fputc"); if (const Function *Fn = dyn_cast<Function>(F->stripPointerCasts())) @@ -311,12 +319,13 @@ void LibCallOptimization::EmitFPutS(Value *Str, Value *File, IRBuilder<> &B) { AWI[2] = AttributeWithIndex::get(~0u, Attribute::NoUnwind); Constant *F; if (isa<PointerType>(File->getType())) - F = M->getOrInsertFunction("fputs", AttrListPtr::get(AWI, 3), Type::Int32Ty, - Context->getPointerTypeUnqual(Type::Int8Ty), + F = M->getOrInsertFunction("fputs", AttrListPtr::get(AWI, 3), + Type::getInt32Ty(*Context), + Type::getInt8PtrTy(*Context), File->getType(), NULL); else - F = M->getOrInsertFunction("fputs", Type::Int32Ty, - Context->getPointerTypeUnqual(Type::Int8Ty), + F = M->getOrInsertFunction("fputs", Type::getInt32Ty(*Context), + Type::getInt8PtrTy(*Context), File->getType(), NULL); CallInst *CI = B.CreateCall2(F, CastToCStr(Str, B), File, "fputs"); @@ -336,17 +345,19 @@ void LibCallOptimization::EmitFWrite(Value *Ptr, Value *Size, Value *File, Constant *F; if (isa<PointerType>(File->getType())) F = M->getOrInsertFunction("fwrite", AttrListPtr::get(AWI, 3), - TD->getIntPtrType(), - Context->getPointerTypeUnqual(Type::Int8Ty), - TD->getIntPtrType(), TD->getIntPtrType(), + TD->getIntPtrType(*Context), + Type::getInt8PtrTy(*Context), + TD->getIntPtrType(*Context), + TD->getIntPtrType(*Context), File->getType(), NULL); else - F = M->getOrInsertFunction("fwrite", TD->getIntPtrType(), - Context->getPointerTypeUnqual(Type::Int8Ty), - TD->getIntPtrType(), TD->getIntPtrType(), + F = M->getOrInsertFunction("fwrite", TD->getIntPtrType(*Context), + Type::getInt8PtrTy(*Context), + TD->getIntPtrType(*Context), + TD->getIntPtrType(*Context), File->getType(), NULL); CallInst *CI = B.CreateCall4(F, CastToCStr(Ptr, B), Size, - Context->getConstantInt(TD->getIntPtrType(), 1), File); + ConstantInt::get(TD->getIntPtrType(*Context), 1), File); if (const Function *Fn = dyn_cast<Function>(F->stripPointerCasts())) CI->setCallingConv(Fn->getCallingConv()); @@ -362,30 +373,30 @@ static uint64_t GetStringLengthH(Value *V, SmallPtrSet<PHINode*, 32> &PHIs) { // Look through noop bitcast instructions. if (BitCastInst *BCI = dyn_cast<BitCastInst>(V)) return GetStringLengthH(BCI->getOperand(0), PHIs); - + // If this is a PHI node, there are two cases: either we have already seen it // or we haven't. if (PHINode *PN = dyn_cast<PHINode>(V)) { if (!PHIs.insert(PN)) return ~0ULL; // already in the set. - + // If it was new, see if all the input strings are the same length. uint64_t LenSoFar = ~0ULL; for (unsigned i = 0, e = PN->getNumIncomingValues(); i != e; ++i) { uint64_t Len = GetStringLengthH(PN->getIncomingValue(i), PHIs); if (Len == 0) return 0; // Unknown length -> unknown. - + if (Len == ~0ULL) continue; - + if (Len != LenSoFar && LenSoFar != ~0ULL) return 0; // Disagree -> unknown. LenSoFar = Len; } - + // Success, all agree. return LenSoFar; } - + // strlen(select(c,x,y)) -> strlen(x) ^ strlen(y) if (SelectInst *SI = dyn_cast<SelectInst>(V)) { uint64_t Len1 = GetStringLengthH(SI->getTrueValue(), PHIs); @@ -397,7 +408,7 @@ static uint64_t GetStringLengthH(Value *V, SmallPtrSet<PHINode*, 32> &PHIs) { if (Len1 != Len2) return 0; return Len1; } - + // If the value is not a GEP instruction nor a constant expression with a // GEP instruction, then return unknown. User *GEP = 0; @@ -410,11 +421,11 @@ static uint64_t GetStringLengthH(Value *V, SmallPtrSet<PHINode*, 32> &PHIs) { } else { return 0; } - + // Make sure the GEP has exactly three arguments. if (GEP->getNumOperands() != 3) return 0; - + // Check to make sure that the first operand of the GEP is an integer and // has value 0 so that we are sure we're indexing into the initializer. if (ConstantInt *Idx = dyn_cast<ConstantInt>(GEP->getOperand(1))) { @@ -422,7 +433,7 @@ static uint64_t GetStringLengthH(Value *V, SmallPtrSet<PHINode*, 32> &PHIs) { return 0; } else return 0; - + // If the second index isn't a ConstantInt, then this is a variable index // into the array. If this occurs, we can't say anything meaningful about // the string. @@ -431,28 +442,30 @@ static uint64_t GetStringLengthH(Value *V, SmallPtrSet<PHINode*, 32> &PHIs) { StartIdx = CI->getZExtValue(); else return 0; - + // The GEP instruction, constant or instruction, must reference a global // variable that is a constant and is initialized. The referenced constant // initializer is the array that we'll use for optimization. GlobalVariable* GV = dyn_cast<GlobalVariable>(GEP->getOperand(0)); - if (!GV || !GV->isConstant() || !GV->hasInitializer()) + if (!GV || !GV->isConstant() || !GV->hasInitializer() || + GV->mayBeOverridden()) return 0; Constant *GlobalInit = GV->getInitializer(); - + // Handle the ConstantAggregateZero case, which is a degenerate case. The // initializer is constant zero so the length of the string must be zero. if (isa<ConstantAggregateZero>(GlobalInit)) return 1; // Len = 0 offset by 1. - + // Must be a Constant Array ConstantArray *Array = dyn_cast<ConstantArray>(GlobalInit); - if (!Array || Array->getType()->getElementType() != Type::Int8Ty) + if (!Array || + Array->getType()->getElementType() != Type::getInt8Ty(V->getContext())) return false; - + // Get the number of elements in the array uint64_t NumElts = Array->getType()->getNumElements(); - + // Traverse the constant array from StartIdx (derived above) which is // the place the GEP refers to in the array. for (unsigned i = StartIdx; i != NumElts; ++i) { @@ -463,7 +476,7 @@ static uint64_t GetStringLengthH(Value *V, SmallPtrSet<PHINode*, 32> &PHIs) { if (CI->isZero()) return i-StartIdx+1; // We found end of string, success! } - + return 0; // The array isn't null terminated, conservatively return 'unknown'. } @@ -471,7 +484,7 @@ static uint64_t GetStringLengthH(Value *V, SmallPtrSet<PHINode*, 32> &PHIs) { /// the specified pointer, return 'len+1'. If we can't, return 0. static uint64_t GetStringLength(Value *V) { if (!isa<PointerType>(V->getType())) return 0; - + SmallPtrSet<PHINode*, 32> PHIs; uint64_t Len = GetStringLengthH(V, PHIs); // If Len is ~0ULL, we had an infinite phi cycle: this is dead code, so return @@ -480,7 +493,7 @@ static uint64_t GetStringLength(Value *V) { } /// IsOnlyUsedInZeroEqualityComparison - Return true if it only matters that the -/// value is equal or not-equal to zero. +/// value is equal or not-equal to zero. static bool IsOnlyUsedInZeroEqualityComparison(Value *V) { for (Value::use_iterator UI = V->use_begin(), E = V->use_end(); UI != E; ++UI) { @@ -496,73 +509,38 @@ static bool IsOnlyUsedInZeroEqualityComparison(Value *V) { } //===----------------------------------------------------------------------===// -// Miscellaneous LibCall Optimizations -//===----------------------------------------------------------------------===// - -namespace { -//===---------------------------------------===// -// 'exit' Optimizations - -/// ExitOpt - int main() { exit(4); } --> int main() { return 4; } -struct VISIBILITY_HIDDEN ExitOpt : public LibCallOptimization { - virtual Value *CallOptimizer(Function *Callee, CallInst *CI, IRBuilder<> &B) { - // Verify we have a reasonable prototype for exit. - if (Callee->arg_size() == 0 || !CI->use_empty()) - return 0; - - // Verify the caller is main, and that the result type of main matches the - // argument type of exit. - if (!Caller->isName("main") || !Caller->hasExternalLinkage() || - Caller->getReturnType() != CI->getOperand(1)->getType()) - return 0; - - TerminatorInst *OldTI = CI->getParent()->getTerminator(); - - // Create the return after the call. - ReturnInst *RI = B.CreateRet(CI->getOperand(1)); - - // Drop all successor phi node entries. - for (unsigned i = 0, e = OldTI->getNumSuccessors(); i != e; ++i) - OldTI->getSuccessor(i)->removePredecessor(CI->getParent()); - - // Erase all instructions from after our return instruction until the end of - // the block. - BasicBlock::iterator FirstDead = RI; ++FirstDead; - CI->getParent()->getInstList().erase(FirstDead, CI->getParent()->end()); - return CI; - } -}; - -//===----------------------------------------------------------------------===// // String and Memory LibCall Optimizations //===----------------------------------------------------------------------===// //===---------------------------------------===// // 'strcat' Optimizations - -struct VISIBILITY_HIDDEN StrCatOpt : public LibCallOptimization { +namespace { +struct StrCatOpt : public LibCallOptimization { virtual Value *CallOptimizer(Function *Callee, CallInst *CI, IRBuilder<> &B) { // Verify the "strcat" function prototype. const FunctionType *FT = Callee->getFunctionType(); if (FT->getNumParams() != 2 || - FT->getReturnType() != Context->getPointerTypeUnqual(Type::Int8Ty) || + FT->getReturnType() != Type::getInt8PtrTy(*Context) || FT->getParamType(0) != FT->getReturnType() || FT->getParamType(1) != FT->getReturnType()) return 0; - + // Extract some information from the instruction Value *Dst = CI->getOperand(1); Value *Src = CI->getOperand(2); - + // See if we can get the length of the input string. uint64_t Len = GetStringLength(Src); if (Len == 0) return 0; --Len; // Unbias length. - + // Handle the simple, do-nothing case: strcat(x, "") -> x if (Len == 0) return Dst; - + + // These optimizations require TargetData. + if (!TD) return 0; + EmitStrLenMemCpy(Src, Dst, Len, B); return Dst; } @@ -571,28 +549,28 @@ struct VISIBILITY_HIDDEN StrCatOpt : public LibCallOptimization { // We need to find the end of the destination string. That's where the // memory is to be moved to. We just generate a call to strlen. Value *DstLen = EmitStrLen(Dst, B); - + // Now that we have the destination's length, we must index into the // destination's pointer to get the actual memcpy destination (end of // the string .. we're concatenating). Value *CpyDst = B.CreateGEP(Dst, DstLen, "endptr"); - + // We have enough information to now generate the memcpy call to do the // concatenation for us. Make a memcpy to copy the nul byte with align = 1. EmitMemCpy(CpyDst, Src, - Context->getConstantInt(TD->getIntPtrType(), Len+1), 1, B); + ConstantInt::get(TD->getIntPtrType(*Context), Len+1), 1, B); } }; //===---------------------------------------===// // 'strncat' Optimizations -struct VISIBILITY_HIDDEN StrNCatOpt : public StrCatOpt { +struct StrNCatOpt : public StrCatOpt { virtual Value *CallOptimizer(Function *Callee, CallInst *CI, IRBuilder<> &B) { // Verify the "strncat" function prototype. const FunctionType *FT = Callee->getFunctionType(); if (FT->getNumParams() != 3 || - FT->getReturnType() != Context->getPointerTypeUnqual(Type::Int8Ty) || + FT->getReturnType() != Type::getInt8PtrTy(*Context) || FT->getParamType(0) != FT->getReturnType() || FT->getParamType(1) != FT->getReturnType() || !isa<IntegerType>(FT->getParamType(2))) @@ -619,6 +597,9 @@ struct VISIBILITY_HIDDEN StrNCatOpt : public StrCatOpt { // strncat(x, c, 0) -> x if (SrcLen == 0 || Len == 0) return Dst; + // These optimizations require TargetData. + if (!TD) return 0; + // We don't optimize this case if (Len < SrcLen) return 0; @@ -632,27 +613,31 @@ struct VISIBILITY_HIDDEN StrNCatOpt : public StrCatOpt { //===---------------------------------------===// // 'strchr' Optimizations -struct VISIBILITY_HIDDEN StrChrOpt : public LibCallOptimization { +struct StrChrOpt : public LibCallOptimization { virtual Value *CallOptimizer(Function *Callee, CallInst *CI, IRBuilder<> &B) { // Verify the "strchr" function prototype. const FunctionType *FT = Callee->getFunctionType(); if (FT->getNumParams() != 2 || - FT->getReturnType() != Context->getPointerTypeUnqual(Type::Int8Ty) || + FT->getReturnType() != Type::getInt8PtrTy(*Context) || FT->getParamType(0) != FT->getReturnType()) return 0; - + Value *SrcStr = CI->getOperand(1); - + // If the second operand is non-constant, see if we can compute the length // of the input string and turn this into memchr. ConstantInt *CharC = dyn_cast<ConstantInt>(CI->getOperand(2)); if (CharC == 0) { + // These optimizations require TargetData. + if (!TD) return 0; + uint64_t Len = GetStringLength(SrcStr); - if (Len == 0 || FT->getParamType(1) != Type::Int32Ty) // memchr needs i32. + if (Len == 0 || + FT->getParamType(1) != Type::getInt32Ty(*Context)) // memchr needs i32. return 0; - + return EmitMemChr(SrcStr, CI->getOperand(2), // include nul. - Context->getConstantInt(TD->getIntPtrType(), Len), B); + ConstantInt::get(TD->getIntPtrType(*Context), Len), B); } // Otherwise, the character is a constant, see if the first argument is @@ -660,24 +645,24 @@ struct VISIBILITY_HIDDEN StrChrOpt : public LibCallOptimization { std::string Str; if (!GetConstantStringInfo(SrcStr, Str)) return 0; - + // strchr can find the nul character. Str += '\0'; char CharValue = CharC->getSExtValue(); - + // Compute the offset. uint64_t i = 0; while (1) { if (i == Str.size()) // Didn't find the char. strchr returns null. - return Context->getNullValue(CI->getType()); + return Constant::getNullValue(CI->getType()); // Did we find our match? if (Str[i] == CharValue) break; ++i; } - + // strchr(s+n,c) -> gep(s+n+i,c) - Value *Idx = Context->getConstantInt(Type::Int64Ty, i); + Value *Idx = ConstantInt::get(Type::getInt64Ty(*Context), i); return B.CreateGEP(SrcStr, Idx, "strchr"); } }; @@ -685,40 +670,44 @@ struct VISIBILITY_HIDDEN StrChrOpt : public LibCallOptimization { //===---------------------------------------===// // 'strcmp' Optimizations -struct VISIBILITY_HIDDEN StrCmpOpt : public LibCallOptimization { +struct StrCmpOpt : public LibCallOptimization { virtual Value *CallOptimizer(Function *Callee, CallInst *CI, IRBuilder<> &B) { // Verify the "strcmp" function prototype. const FunctionType *FT = Callee->getFunctionType(); - if (FT->getNumParams() != 2 || FT->getReturnType() != Type::Int32Ty || + if (FT->getNumParams() != 2 || + FT->getReturnType() != Type::getInt32Ty(*Context) || FT->getParamType(0) != FT->getParamType(1) || - FT->getParamType(0) != Context->getPointerTypeUnqual(Type::Int8Ty)) + FT->getParamType(0) != Type::getInt8PtrTy(*Context)) return 0; - + Value *Str1P = CI->getOperand(1), *Str2P = CI->getOperand(2); if (Str1P == Str2P) // strcmp(x,x) -> 0 - return Context->getConstantInt(CI->getType(), 0); - + return ConstantInt::get(CI->getType(), 0); + std::string Str1, Str2; bool HasStr1 = GetConstantStringInfo(Str1P, Str1); bool HasStr2 = GetConstantStringInfo(Str2P, Str2); - + if (HasStr1 && Str1.empty()) // strcmp("", x) -> *x return B.CreateZExt(B.CreateLoad(Str2P, "strcmpload"), CI->getType()); - + if (HasStr2 && Str2.empty()) // strcmp(x,"") -> *x return B.CreateZExt(B.CreateLoad(Str1P, "strcmpload"), CI->getType()); - + // strcmp(x, y) -> cnst (if both x and y are constant strings) if (HasStr1 && HasStr2) - return Context->getConstantInt(CI->getType(), + return ConstantInt::get(CI->getType(), strcmp(Str1.c_str(),Str2.c_str())); // strcmp(P, "x") -> memcmp(P, "x", 2) uint64_t Len1 = GetStringLength(Str1P); uint64_t Len2 = GetStringLength(Str2P); if (Len1 && Len2) { + // These optimizations require TargetData. + if (!TD) return 0; + return EmitMemCmp(Str1P, Str2P, - Context->getConstantInt(TD->getIntPtrType(), + ConstantInt::get(TD->getIntPtrType(*Context), std::min(Len1, Len2)), B); } @@ -729,43 +718,44 @@ struct VISIBILITY_HIDDEN StrCmpOpt : public LibCallOptimization { //===---------------------------------------===// // 'strncmp' Optimizations -struct VISIBILITY_HIDDEN StrNCmpOpt : public LibCallOptimization { +struct StrNCmpOpt : public LibCallOptimization { virtual Value *CallOptimizer(Function *Callee, CallInst *CI, IRBuilder<> &B) { // Verify the "strncmp" function prototype. const FunctionType *FT = Callee->getFunctionType(); - if (FT->getNumParams() != 3 || FT->getReturnType() != Type::Int32Ty || + if (FT->getNumParams() != 3 || + FT->getReturnType() != Type::getInt32Ty(*Context) || FT->getParamType(0) != FT->getParamType(1) || - FT->getParamType(0) != Context->getPointerTypeUnqual(Type::Int8Ty) || + FT->getParamType(0) != Type::getInt8PtrTy(*Context) || !isa<IntegerType>(FT->getParamType(2))) return 0; - + Value *Str1P = CI->getOperand(1), *Str2P = CI->getOperand(2); if (Str1P == Str2P) // strncmp(x,x,n) -> 0 - return Context->getConstantInt(CI->getType(), 0); - + return ConstantInt::get(CI->getType(), 0); + // Get the length argument if it is constant. uint64_t Length; if (ConstantInt *LengthArg = dyn_cast<ConstantInt>(CI->getOperand(3))) Length = LengthArg->getZExtValue(); else return 0; - + if (Length == 0) // strncmp(x,y,0) -> 0 - return Context->getConstantInt(CI->getType(), 0); - + return ConstantInt::get(CI->getType(), 0); + std::string Str1, Str2; bool HasStr1 = GetConstantStringInfo(Str1P, Str1); bool HasStr2 = GetConstantStringInfo(Str2P, Str2); - + if (HasStr1 && Str1.empty()) // strncmp("", x, n) -> *x return B.CreateZExt(B.CreateLoad(Str2P, "strcmpload"), CI->getType()); - + if (HasStr2 && Str2.empty()) // strncmp(x, "", n) -> *x return B.CreateZExt(B.CreateLoad(Str1P, "strcmpload"), CI->getType()); - + // strncmp(x, y) -> cnst (if both x and y are constant strings) if (HasStr1 && HasStr2) - return Context->getConstantInt(CI->getType(), + return ConstantInt::get(CI->getType(), strncmp(Str1.c_str(), Str2.c_str(), Length)); return 0; } @@ -775,27 +765,30 @@ struct VISIBILITY_HIDDEN StrNCmpOpt : public LibCallOptimization { //===---------------------------------------===// // 'strcpy' Optimizations -struct VISIBILITY_HIDDEN StrCpyOpt : public LibCallOptimization { +struct StrCpyOpt : public LibCallOptimization { virtual Value *CallOptimizer(Function *Callee, CallInst *CI, IRBuilder<> &B) { // Verify the "strcpy" function prototype. const FunctionType *FT = Callee->getFunctionType(); if (FT->getNumParams() != 2 || FT->getReturnType() != FT->getParamType(0) || FT->getParamType(0) != FT->getParamType(1) || - FT->getParamType(0) != Context->getPointerTypeUnqual(Type::Int8Ty)) + FT->getParamType(0) != Type::getInt8PtrTy(*Context)) return 0; - + Value *Dst = CI->getOperand(1), *Src = CI->getOperand(2); if (Dst == Src) // strcpy(x,x) -> x return Src; - + + // These optimizations require TargetData. + if (!TD) return 0; + // See if we can get the length of the input string. uint64_t Len = GetStringLength(Src); if (Len == 0) return 0; - + // We have enough information to now generate the memcpy call to do the // concatenation for us. Make a memcpy to copy the nul byte with align = 1. EmitMemCpy(Dst, Src, - Context->getConstantInt(TD->getIntPtrType(), Len), 1, B); + ConstantInt::get(TD->getIntPtrType(*Context), Len), 1, B); return Dst; } }; @@ -803,12 +796,12 @@ struct VISIBILITY_HIDDEN StrCpyOpt : public LibCallOptimization { //===---------------------------------------===// // 'strncpy' Optimizations -struct VISIBILITY_HIDDEN StrNCpyOpt : public LibCallOptimization { +struct StrNCpyOpt : public LibCallOptimization { virtual Value *CallOptimizer(Function *Callee, CallInst *CI, IRBuilder<> &B) { const FunctionType *FT = Callee->getFunctionType(); if (FT->getNumParams() != 3 || FT->getReturnType() != FT->getParamType(0) || FT->getParamType(0) != FT->getParamType(1) || - FT->getParamType(0) != Context->getPointerTypeUnqual(Type::Int8Ty) || + FT->getParamType(0) != Type::getInt8PtrTy(*Context) || !isa<IntegerType>(FT->getParamType(2))) return 0; @@ -823,7 +816,8 @@ struct VISIBILITY_HIDDEN StrNCpyOpt : public LibCallOptimization { if (SrcLen == 0) { // strncpy(x, "", y) -> memset(x, '\0', y, 1) - EmitMemSet(Dst, Context->getConstantInt(Type::Int8Ty, '\0'), LenOp, B); + EmitMemSet(Dst, ConstantInt::get(Type::getInt8Ty(*Context), '\0'), LenOp, + B); return Dst; } @@ -835,12 +829,15 @@ struct VISIBILITY_HIDDEN StrNCpyOpt : public LibCallOptimization { if (Len == 0) return Dst; // strncpy(x, y, 0) -> x + // These optimizations require TargetData. + if (!TD) return 0; + // Let strncpy handle the zero padding if (Len > SrcLen+1) return 0; // strncpy(x, s, c) -> memcpy(x, s, c, 1) [s and c are constant] EmitMemCpy(Dst, Src, - Context->getConstantInt(TD->getIntPtrType(), Len), 1, B); + ConstantInt::get(TD->getIntPtrType(*Context), Len), 1, B); return Dst; } @@ -849,19 +846,19 @@ struct VISIBILITY_HIDDEN StrNCpyOpt : public LibCallOptimization { //===---------------------------------------===// // 'strlen' Optimizations -struct VISIBILITY_HIDDEN StrLenOpt : public LibCallOptimization { +struct StrLenOpt : public LibCallOptimization { virtual Value *CallOptimizer(Function *Callee, CallInst *CI, IRBuilder<> &B) { const FunctionType *FT = Callee->getFunctionType(); if (FT->getNumParams() != 1 || - FT->getParamType(0) != Context->getPointerTypeUnqual(Type::Int8Ty) || + FT->getParamType(0) != Type::getInt8PtrTy(*Context) || !isa<IntegerType>(FT->getReturnType())) return 0; - + Value *Src = CI->getOperand(1); // Constant folding: strlen("xyz") -> 3 if (uint64_t Len = GetStringLength(Src)) - return Context->getConstantInt(CI->getType(), Len-1); + return ConstantInt::get(CI->getType(), Len-1); // Handle strlen(p) != 0. if (!IsOnlyUsedInZeroEqualityComparison(CI)) return 0; @@ -875,7 +872,7 @@ struct VISIBILITY_HIDDEN StrLenOpt : public LibCallOptimization { //===---------------------------------------===// // 'strto*' Optimizations -struct VISIBILITY_HIDDEN StrToOpt : public LibCallOptimization { +struct StrToOpt : public LibCallOptimization { virtual Value *CallOptimizer(Function *Callee, CallInst *CI, IRBuilder<> &B) { const FunctionType *FT = Callee->getFunctionType(); if ((FT->getNumParams() != 2 && FT->getNumParams() != 3) || @@ -897,18 +894,18 @@ struct VISIBILITY_HIDDEN StrToOpt : public LibCallOptimization { //===---------------------------------------===// // 'memcmp' Optimizations -struct VISIBILITY_HIDDEN MemCmpOpt : public LibCallOptimization { +struct MemCmpOpt : public LibCallOptimization { virtual Value *CallOptimizer(Function *Callee, CallInst *CI, IRBuilder<> &B) { const FunctionType *FT = Callee->getFunctionType(); if (FT->getNumParams() != 3 || !isa<PointerType>(FT->getParamType(0)) || !isa<PointerType>(FT->getParamType(1)) || - FT->getReturnType() != Type::Int32Ty) + FT->getReturnType() != Type::getInt32Ty(*Context)) return 0; Value *LHS = CI->getOperand(1), *RHS = CI->getOperand(2); if (LHS == RHS) // memcmp(s,s,x) -> 0 - return Context->getNullValue(CI->getType()); + return Constant::getNullValue(CI->getType()); // Make sure we have a constant length. ConstantInt *LenC = dyn_cast<ConstantInt>(CI->getOperand(3)); @@ -916,7 +913,7 @@ struct VISIBILITY_HIDDEN MemCmpOpt : public LibCallOptimization { uint64_t Len = LenC->getZExtValue(); if (Len == 0) // memcmp(s1,s2,0) -> 0 - return Context->getNullValue(CI->getType()); + return Constant::getNullValue(CI->getType()); if (Len == 1) { // memcmp(S1,S2,1) -> *LHS - *RHS Value *LHSV = B.CreateLoad(CastToCStr(LHS, B), "lhsv"); @@ -927,8 +924,8 @@ struct VISIBILITY_HIDDEN MemCmpOpt : public LibCallOptimization { // memcmp(S1,S2,2) != 0 -> (*(short*)LHS ^ *(short*)RHS) != 0 // memcmp(S1,S2,4) != 0 -> (*(int*)LHS ^ *(int*)RHS) != 0 if ((Len == 2 || Len == 4) && IsOnlyUsedInZeroEqualityComparison(CI)) { - const Type *PTy = Context->getPointerTypeUnqual(Len == 2 ? - Type::Int16Ty : Type::Int32Ty); + const Type *PTy = PointerType::getUnqual(Len == 2 ? + Type::getInt16Ty(*Context) : Type::getInt32Ty(*Context)); LHS = B.CreateBitCast(LHS, PTy, "tmp"); RHS = B.CreateBitCast(RHS, PTy, "tmp"); LoadInst *LHSV = B.CreateLoad(LHS, "lhsv"); @@ -944,13 +941,16 @@ struct VISIBILITY_HIDDEN MemCmpOpt : public LibCallOptimization { //===---------------------------------------===// // 'memcpy' Optimizations -struct VISIBILITY_HIDDEN MemCpyOpt : public LibCallOptimization { +struct MemCpyOpt : public LibCallOptimization { virtual Value *CallOptimizer(Function *Callee, CallInst *CI, IRBuilder<> &B) { + // These optimizations require TargetData. + if (!TD) return 0; + const FunctionType *FT = Callee->getFunctionType(); if (FT->getNumParams() != 3 || FT->getReturnType() != FT->getParamType(0) || !isa<PointerType>(FT->getParamType(0)) || !isa<PointerType>(FT->getParamType(1)) || - FT->getParamType(2) != TD->getIntPtrType()) + FT->getParamType(2) != TD->getIntPtrType(*Context)) return 0; // memcpy(x, y, n) -> llvm.memcpy(x, y, n, 1) @@ -962,25 +962,28 @@ struct VISIBILITY_HIDDEN MemCpyOpt : public LibCallOptimization { //===---------------------------------------===// // 'memmove' Optimizations -struct VISIBILITY_HIDDEN MemMoveOpt : public LibCallOptimization { +struct MemMoveOpt : public LibCallOptimization { virtual Value *CallOptimizer(Function *Callee, CallInst *CI, IRBuilder<> &B) { + // These optimizations require TargetData. + if (!TD) return 0; + const FunctionType *FT = Callee->getFunctionType(); if (FT->getNumParams() != 3 || FT->getReturnType() != FT->getParamType(0) || !isa<PointerType>(FT->getParamType(0)) || !isa<PointerType>(FT->getParamType(1)) || - FT->getParamType(2) != TD->getIntPtrType()) + FT->getParamType(2) != TD->getIntPtrType(*Context)) return 0; // memmove(x, y, n) -> llvm.memmove(x, y, n, 1) Module *M = Caller->getParent(); Intrinsic::ID IID = Intrinsic::memmove; const Type *Tys[1]; - Tys[0] = TD->getIntPtrType(); + Tys[0] = TD->getIntPtrType(*Context); Value *MemMove = Intrinsic::getDeclaration(M, IID, Tys, 1); Value *Dst = CastToCStr(CI->getOperand(1), B); Value *Src = CastToCStr(CI->getOperand(2), B); Value *Size = CI->getOperand(3); - Value *Align = Context->getConstantInt(Type::Int32Ty, 1); + Value *Align = ConstantInt::get(Type::getInt32Ty(*Context), 1); B.CreateCall4(MemMove, Dst, Src, Size, Align); return CI->getOperand(1); } @@ -989,17 +992,21 @@ struct VISIBILITY_HIDDEN MemMoveOpt : public LibCallOptimization { //===---------------------------------------===// // 'memset' Optimizations -struct VISIBILITY_HIDDEN MemSetOpt : public LibCallOptimization { +struct MemSetOpt : public LibCallOptimization { virtual Value *CallOptimizer(Function *Callee, CallInst *CI, IRBuilder<> &B) { + // These optimizations require TargetData. + if (!TD) return 0; + const FunctionType *FT = Callee->getFunctionType(); if (FT->getNumParams() != 3 || FT->getReturnType() != FT->getParamType(0) || !isa<PointerType>(FT->getParamType(0)) || - FT->getParamType(1) != TD->getIntPtrType() || - FT->getParamType(2) != TD->getIntPtrType()) + !isa<IntegerType>(FT->getParamType(1)) || + FT->getParamType(2) != TD->getIntPtrType(*Context)) return 0; // memset(p, v, n) -> llvm.memset(p, v, n, 1) - Value *Val = B.CreateTrunc(CI->getOperand(2), Type::Int8Ty); + Value *Val = B.CreateIntCast(CI->getOperand(2), Type::getInt8Ty(*Context), + false); EmitMemSet(CI->getOperand(1), Val, CI->getOperand(3), B); return CI->getOperand(1); } @@ -1012,7 +1019,7 @@ struct VISIBILITY_HIDDEN MemSetOpt : public LibCallOptimization { //===---------------------------------------===// // 'pow*' Optimizations -struct VISIBILITY_HIDDEN PowOpt : public LibCallOptimization { +struct PowOpt : public LibCallOptimization { virtual Value *CallOptimizer(Function *Callee, CallInst *CI, IRBuilder<> &B) { const FunctionType *FT = Callee->getFunctionType(); // Just make sure this has 2 arguments of the same FP type, which match the @@ -1021,40 +1028,44 @@ struct VISIBILITY_HIDDEN PowOpt : public LibCallOptimization { FT->getParamType(0) != FT->getParamType(1) || !FT->getParamType(0)->isFloatingPoint()) return 0; - + Value *Op1 = CI->getOperand(1), *Op2 = CI->getOperand(2); if (ConstantFP *Op1C = dyn_cast<ConstantFP>(Op1)) { if (Op1C->isExactlyValue(1.0)) // pow(1.0, x) -> 1.0 return Op1C; if (Op1C->isExactlyValue(2.0)) // pow(2.0, x) -> exp2(x) - return EmitUnaryFloatFnCall(Op2, "exp2", B); + return EmitUnaryFloatFnCall(Op2, "exp2", B, Callee->getAttributes()); } - + ConstantFP *Op2C = dyn_cast<ConstantFP>(Op2); if (Op2C == 0) return 0; - + if (Op2C->getValueAPF().isZero()) // pow(x, 0.0) -> 1.0 - return Context->getConstantFP(CI->getType(), 1.0); - + return ConstantFP::get(CI->getType(), 1.0); + if (Op2C->isExactlyValue(0.5)) { - // FIXME: This is not safe for -0.0 and -inf. This can only be done when - // 'unsafe' math optimizations are allowed. - // x pow(x, 0.5) sqrt(x) - // --------------------------------------------- - // -0.0 +0.0 -0.0 - // -inf +inf NaN -#if 0 - // pow(x, 0.5) -> sqrt(x) - return B.CreateCall(get_sqrt(), Op1, "sqrt"); -#endif + // Expand pow(x, 0.5) to (x == -infinity ? +infinity : fabs(sqrt(x))). + // This is faster than calling pow, and still handles negative zero + // and negative infinite correctly. + // TODO: In fast-math mode, this could be just sqrt(x). + // TODO: In finite-only mode, this could be just fabs(sqrt(x)). + Value *Inf = ConstantFP::getInfinity(CI->getType()); + Value *NegInf = ConstantFP::getInfinity(CI->getType(), true); + Value *Sqrt = EmitUnaryFloatFnCall(Op1, "sqrt", B, + Callee->getAttributes()); + Value *FAbs = EmitUnaryFloatFnCall(Sqrt, "fabs", B, + Callee->getAttributes()); + Value *FCmp = B.CreateFCmpOEQ(Op1, NegInf, "tmp"); + Value *Sel = B.CreateSelect(FCmp, Inf, FAbs, "tmp"); + return Sel; } - + if (Op2C->isExactlyValue(1.0)) // pow(x, 1.0) -> x return Op1; if (Op2C->isExactlyValue(2.0)) // pow(x, 2.0) -> x*x return B.CreateFMul(Op1, Op1, "pow2"); if (Op2C->isExactlyValue(-1.0)) // pow(x, -1.0) -> 1.0/x - return B.CreateFDiv(Context->getConstantFP(CI->getType(), 1.0), + return B.CreateFDiv(ConstantFP::get(CI->getType(), 1.0), Op1, "powrecip"); return 0; } @@ -1063,7 +1074,7 @@ struct VISIBILITY_HIDDEN PowOpt : public LibCallOptimization { //===---------------------------------------===// // 'exp2' Optimizations -struct VISIBILITY_HIDDEN Exp2Opt : public LibCallOptimization { +struct Exp2Opt : public LibCallOptimization { virtual Value *CallOptimizer(Function *Callee, CallInst *CI, IRBuilder<> &B) { const FunctionType *FT = Callee->getFunctionType(); // Just make sure this has 1 argument of FP type, which matches the @@ -1071,35 +1082,38 @@ struct VISIBILITY_HIDDEN Exp2Opt : public LibCallOptimization { if (FT->getNumParams() != 1 || FT->getReturnType() != FT->getParamType(0) || !FT->getParamType(0)->isFloatingPoint()) return 0; - + Value *Op = CI->getOperand(1); // Turn exp2(sitofp(x)) -> ldexp(1.0, sext(x)) if sizeof(x) <= 32 // Turn exp2(uitofp(x)) -> ldexp(1.0, zext(x)) if sizeof(x) < 32 Value *LdExpArg = 0; if (SIToFPInst *OpC = dyn_cast<SIToFPInst>(Op)) { if (OpC->getOperand(0)->getType()->getPrimitiveSizeInBits() <= 32) - LdExpArg = B.CreateSExt(OpC->getOperand(0), Type::Int32Ty, "tmp"); + LdExpArg = B.CreateSExt(OpC->getOperand(0), + Type::getInt32Ty(*Context), "tmp"); } else if (UIToFPInst *OpC = dyn_cast<UIToFPInst>(Op)) { if (OpC->getOperand(0)->getType()->getPrimitiveSizeInBits() < 32) - LdExpArg = B.CreateZExt(OpC->getOperand(0), Type::Int32Ty, "tmp"); + LdExpArg = B.CreateZExt(OpC->getOperand(0), + Type::getInt32Ty(*Context), "tmp"); } if (LdExpArg) { const char *Name; - if (Op->getType() == Type::FloatTy) + if (Op->getType()->isFloatTy()) Name = "ldexpf"; - else if (Op->getType() == Type::DoubleTy) + else if (Op->getType()->isDoubleTy()) Name = "ldexp"; else Name = "ldexpl"; - Constant *One = Context->getConstantFP(APFloat(1.0f)); - if (Op->getType() != Type::FloatTy) - One = Context->getConstantExprFPExtend(One, Op->getType()); + Constant *One = ConstantFP::get(*Context, APFloat(1.0f)); + if (!Op->getType()->isFloatTy()) + One = ConstantExpr::getFPExtend(One, Op->getType()); Module *M = Caller->getParent(); Value *Callee = M->getOrInsertFunction(Name, Op->getType(), - Op->getType(), Type::Int32Ty,NULL); + Op->getType(), + Type::getInt32Ty(*Context),NULL); CallInst *CI = B.CreateCall2(Callee, One, LdExpArg); if (const Function *F = dyn_cast<Function>(Callee->stripPointerCasts())) CI->setCallingConv(F->getCallingConv()); @@ -1113,22 +1127,23 @@ struct VISIBILITY_HIDDEN Exp2Opt : public LibCallOptimization { //===---------------------------------------===// // Double -> Float Shrinking Optimizations for Unary Functions like 'floor' -struct VISIBILITY_HIDDEN UnaryDoubleFPOpt : public LibCallOptimization { +struct UnaryDoubleFPOpt : public LibCallOptimization { virtual Value *CallOptimizer(Function *Callee, CallInst *CI, IRBuilder<> &B) { const FunctionType *FT = Callee->getFunctionType(); - if (FT->getNumParams() != 1 || FT->getReturnType() != Type::DoubleTy || - FT->getParamType(0) != Type::DoubleTy) + if (FT->getNumParams() != 1 || !FT->getReturnType()->isDoubleTy() || + !FT->getParamType(0)->isDoubleTy()) return 0; // If this is something like 'floor((double)floatval)', convert to floorf. FPExtInst *Cast = dyn_cast<FPExtInst>(CI->getOperand(1)); - if (Cast == 0 || Cast->getOperand(0)->getType() != Type::FloatTy) + if (Cast == 0 || !Cast->getOperand(0)->getType()->isFloatTy()) return 0; // floor((double)floatval) -> (double)floorf(floatval) Value *V = Cast->getOperand(0); - V = EmitUnaryFloatFnCall(V, Callee->getNameStart(), B); - return B.CreateFPExt(V, Type::DoubleTy); + V = EmitUnaryFloatFnCall(V, Callee->getName().data(), B, + Callee->getAttributes()); + return B.CreateFPExt(V, Type::getDoubleTy(*Context)); } }; @@ -1139,54 +1154,56 @@ struct VISIBILITY_HIDDEN UnaryDoubleFPOpt : public LibCallOptimization { //===---------------------------------------===// // 'ffs*' Optimizations -struct VISIBILITY_HIDDEN FFSOpt : public LibCallOptimization { +struct FFSOpt : public LibCallOptimization { virtual Value *CallOptimizer(Function *Callee, CallInst *CI, IRBuilder<> &B) { const FunctionType *FT = Callee->getFunctionType(); // Just make sure this has 2 arguments of the same FP type, which match the // result type. - if (FT->getNumParams() != 1 || FT->getReturnType() != Type::Int32Ty || + if (FT->getNumParams() != 1 || + FT->getReturnType() != Type::getInt32Ty(*Context) || !isa<IntegerType>(FT->getParamType(0))) return 0; - + Value *Op = CI->getOperand(1); - + // Constant fold. if (ConstantInt *CI = dyn_cast<ConstantInt>(Op)) { if (CI->getValue() == 0) // ffs(0) -> 0. - return Context->getNullValue(CI->getType()); - return Context->getConstantInt(Type::Int32Ty, // ffs(c) -> cttz(c)+1 + return Constant::getNullValue(CI->getType()); + return ConstantInt::get(Type::getInt32Ty(*Context), // ffs(c) -> cttz(c)+1 CI->getValue().countTrailingZeros()+1); } - + // ffs(x) -> x != 0 ? (i32)llvm.cttz(x)+1 : 0 const Type *ArgType = Op->getType(); Value *F = Intrinsic::getDeclaration(Callee->getParent(), Intrinsic::cttz, &ArgType, 1); Value *V = B.CreateCall(F, Op, "cttz"); - V = B.CreateAdd(V, Context->getConstantInt(V->getType(), 1), "tmp"); - V = B.CreateIntCast(V, Type::Int32Ty, false, "tmp"); - - Value *Cond = B.CreateICmpNE(Op, Context->getNullValue(ArgType), "tmp"); - return B.CreateSelect(Cond, V, Context->getConstantInt(Type::Int32Ty, 0)); + V = B.CreateAdd(V, ConstantInt::get(V->getType(), 1), "tmp"); + V = B.CreateIntCast(V, Type::getInt32Ty(*Context), false, "tmp"); + + Value *Cond = B.CreateICmpNE(Op, Constant::getNullValue(ArgType), "tmp"); + return B.CreateSelect(Cond, V, + ConstantInt::get(Type::getInt32Ty(*Context), 0)); } }; //===---------------------------------------===// // 'isdigit' Optimizations -struct VISIBILITY_HIDDEN IsDigitOpt : public LibCallOptimization { +struct IsDigitOpt : public LibCallOptimization { virtual Value *CallOptimizer(Function *Callee, CallInst *CI, IRBuilder<> &B) { const FunctionType *FT = Callee->getFunctionType(); // We require integer(i32) if (FT->getNumParams() != 1 || !isa<IntegerType>(FT->getReturnType()) || - FT->getParamType(0) != Type::Int32Ty) + FT->getParamType(0) != Type::getInt32Ty(*Context)) return 0; - + // isdigit(c) -> (c-'0') <u 10 Value *Op = CI->getOperand(1); - Op = B.CreateSub(Op, Context->getConstantInt(Type::Int32Ty, '0'), + Op = B.CreateSub(Op, ConstantInt::get(Type::getInt32Ty(*Context), '0'), "isdigittmp"); - Op = B.CreateICmpULT(Op, Context->getConstantInt(Type::Int32Ty, 10), + Op = B.CreateICmpULT(Op, ConstantInt::get(Type::getInt32Ty(*Context), 10), "isdigit"); return B.CreateZExt(Op, CI->getType()); } @@ -1195,58 +1212,58 @@ struct VISIBILITY_HIDDEN IsDigitOpt : public LibCallOptimization { //===---------------------------------------===// // 'isascii' Optimizations -struct VISIBILITY_HIDDEN IsAsciiOpt : public LibCallOptimization { +struct IsAsciiOpt : public LibCallOptimization { virtual Value *CallOptimizer(Function *Callee, CallInst *CI, IRBuilder<> &B) { const FunctionType *FT = Callee->getFunctionType(); // We require integer(i32) if (FT->getNumParams() != 1 || !isa<IntegerType>(FT->getReturnType()) || - FT->getParamType(0) != Type::Int32Ty) + FT->getParamType(0) != Type::getInt32Ty(*Context)) return 0; - + // isascii(c) -> c <u 128 Value *Op = CI->getOperand(1); - Op = B.CreateICmpULT(Op, Context->getConstantInt(Type::Int32Ty, 128), + Op = B.CreateICmpULT(Op, ConstantInt::get(Type::getInt32Ty(*Context), 128), "isascii"); return B.CreateZExt(Op, CI->getType()); } }; - + //===---------------------------------------===// // 'abs', 'labs', 'llabs' Optimizations -struct VISIBILITY_HIDDEN AbsOpt : public LibCallOptimization { +struct AbsOpt : public LibCallOptimization { virtual Value *CallOptimizer(Function *Callee, CallInst *CI, IRBuilder<> &B) { const FunctionType *FT = Callee->getFunctionType(); // We require integer(integer) where the types agree. if (FT->getNumParams() != 1 || !isa<IntegerType>(FT->getReturnType()) || FT->getParamType(0) != FT->getReturnType()) return 0; - + // abs(x) -> x >s -1 ? x : -x Value *Op = CI->getOperand(1); - Value *Pos = B.CreateICmpSGT(Op, - Context->getConstantIntAllOnesValue(Op->getType()), + Value *Pos = B.CreateICmpSGT(Op, + Constant::getAllOnesValue(Op->getType()), "ispos"); Value *Neg = B.CreateNeg(Op, "neg"); return B.CreateSelect(Pos, Op, Neg); } }; - + //===---------------------------------------===// // 'toascii' Optimizations -struct VISIBILITY_HIDDEN ToAsciiOpt : public LibCallOptimization { +struct ToAsciiOpt : public LibCallOptimization { virtual Value *CallOptimizer(Function *Callee, CallInst *CI, IRBuilder<> &B) { const FunctionType *FT = Callee->getFunctionType(); // We require i32(i32) if (FT->getNumParams() != 1 || FT->getReturnType() != FT->getParamType(0) || - FT->getParamType(0) != Type::Int32Ty) + FT->getParamType(0) != Type::getInt32Ty(*Context)) return 0; - + // isascii(c) -> c & 0x7f return B.CreateAnd(CI->getOperand(1), - Context->getConstantInt(CI->getType(),0x7F)); + ConstantInt::get(CI->getType(),0x7F)); } }; @@ -1257,15 +1274,15 @@ struct VISIBILITY_HIDDEN ToAsciiOpt : public LibCallOptimization { //===---------------------------------------===// // 'printf' Optimizations -struct VISIBILITY_HIDDEN PrintFOpt : public LibCallOptimization { +struct PrintFOpt : public LibCallOptimization { virtual Value *CallOptimizer(Function *Callee, CallInst *CI, IRBuilder<> &B) { // Require one fixed pointer argument and an integer/void result. const FunctionType *FT = Callee->getFunctionType(); if (FT->getNumParams() < 1 || !isa<PointerType>(FT->getParamType(0)) || !(isa<IntegerType>(FT->getReturnType()) || - FT->getReturnType() == Type::VoidTy)) + FT->getReturnType()->isVoidTy())) return 0; - + // Check for a fixed format string. std::string FormatStr; if (!GetConstantStringInfo(CI->getOperand(1), FormatStr)) @@ -1273,39 +1290,39 @@ struct VISIBILITY_HIDDEN PrintFOpt : public LibCallOptimization { // Empty format string -> noop. if (FormatStr.empty()) // Tolerate printf's declared void. - return CI->use_empty() ? (Value*)CI : - Context->getConstantInt(CI->getType(), 0); - + return CI->use_empty() ? (Value*)CI : + ConstantInt::get(CI->getType(), 0); + // printf("x") -> putchar('x'), even for '%'. if (FormatStr.size() == 1) { - EmitPutChar(Context->getConstantInt(Type::Int32Ty, FormatStr[0]), B); - return CI->use_empty() ? (Value*)CI : - Context->getConstantInt(CI->getType(), 1); + EmitPutChar(ConstantInt::get(Type::getInt32Ty(*Context), FormatStr[0]), B); + return CI->use_empty() ? (Value*)CI : + ConstantInt::get(CI->getType(), 1); } - + // printf("foo\n") --> puts("foo") if (FormatStr[FormatStr.size()-1] == '\n' && FormatStr.find('%') == std::string::npos) { // no format characters. // Create a string literal with no \n on it. We expect the constant merge // pass to be run after this pass, to merge duplicate strings. FormatStr.erase(FormatStr.end()-1); - Constant *C = Context->getConstantArray(FormatStr, true); - C = new GlobalVariable(C->getType(), true,GlobalVariable::InternalLinkage, - C, "str", Callee->getParent()); + Constant *C = ConstantArray::get(*Context, FormatStr, true); + C = new GlobalVariable(*Callee->getParent(), C->getType(), true, + GlobalVariable::InternalLinkage, C, "str"); EmitPutS(C, B); - return CI->use_empty() ? (Value*)CI : - Context->getConstantInt(CI->getType(), FormatStr.size()+1); + return CI->use_empty() ? (Value*)CI : + ConstantInt::get(CI->getType(), FormatStr.size()+1); } - + // Optimize specific format strings. // printf("%c", chr) --> putchar(*(i8*)dst) if (FormatStr == "%c" && CI->getNumOperands() > 2 && isa<IntegerType>(CI->getOperand(2)->getType())) { EmitPutChar(CI->getOperand(2), B); - return CI->use_empty() ? (Value*)CI : - Context->getConstantInt(CI->getType(), 1); + return CI->use_empty() ? (Value*)CI : + ConstantInt::get(CI->getType(), 1); } - + // printf("%s\n", str) --> puts(str) if (FormatStr == "%s\n" && CI->getNumOperands() > 2 && isa<PointerType>(CI->getOperand(2)->getType()) && @@ -1320,7 +1337,7 @@ struct VISIBILITY_HIDDEN PrintFOpt : public LibCallOptimization { //===---------------------------------------===// // 'sprintf' Optimizations -struct VISIBILITY_HIDDEN SPrintFOpt : public LibCallOptimization { +struct SPrintFOpt : public LibCallOptimization { virtual Value *CallOptimizer(Function *Callee, CallInst *CI, IRBuilder<> &B) { // Require two fixed pointer arguments and an integer result. const FunctionType *FT = Callee->getFunctionType(); @@ -1333,7 +1350,7 @@ struct VISIBILITY_HIDDEN SPrintFOpt : public LibCallOptimization { std::string FormatStr; if (!GetConstantStringInfo(CI->getOperand(2), FormatStr)) return 0; - + // If we just have a format string (nothing else crazy) transform it. if (CI->getNumOperands() == 3) { // Make sure there's no % in the constant array. We could try to handle @@ -1341,41 +1358,49 @@ struct VISIBILITY_HIDDEN SPrintFOpt : public LibCallOptimization { for (unsigned i = 0, e = FormatStr.size(); i != e; ++i) if (FormatStr[i] == '%') return 0; // we found a format specifier, bail out. - + + // These optimizations require TargetData. + if (!TD) return 0; + // sprintf(str, fmt) -> llvm.memcpy(str, fmt, strlen(fmt)+1, 1) EmitMemCpy(CI->getOperand(1), CI->getOperand(2), // Copy the nul byte. - Context->getConstantInt(TD->getIntPtrType(), FormatStr.size()+1),1,B); - return Context->getConstantInt(CI->getType(), FormatStr.size()); + ConstantInt::get(TD->getIntPtrType(*Context), FormatStr.size()+1),1,B); + return ConstantInt::get(CI->getType(), FormatStr.size()); } - + // The remaining optimizations require the format string to be "%s" or "%c" // and have an extra operand. if (FormatStr.size() != 2 || FormatStr[0] != '%' || CI->getNumOperands() <4) return 0; - + // Decode the second character of the format string. if (FormatStr[1] == 'c') { // sprintf(dst, "%c", chr) --> *(i8*)dst = chr; *((i8*)dst+1) = 0 if (!isa<IntegerType>(CI->getOperand(3)->getType())) return 0; - Value *V = B.CreateTrunc(CI->getOperand(3), Type::Int8Ty, "char"); + Value *V = B.CreateTrunc(CI->getOperand(3), + Type::getInt8Ty(*Context), "char"); Value *Ptr = CastToCStr(CI->getOperand(1), B); B.CreateStore(V, Ptr); - Ptr = B.CreateGEP(Ptr, Context->getConstantInt(Type::Int32Ty, 1), "nul"); - B.CreateStore(Context->getNullValue(Type::Int8Ty), Ptr); - - return Context->getConstantInt(CI->getType(), 1); + Ptr = B.CreateGEP(Ptr, ConstantInt::get(Type::getInt32Ty(*Context), 1), + "nul"); + B.CreateStore(Constant::getNullValue(Type::getInt8Ty(*Context)), Ptr); + + return ConstantInt::get(CI->getType(), 1); } - + if (FormatStr[1] == 's') { + // These optimizations require TargetData. + if (!TD) return 0; + // sprintf(dest, "%s", str) -> llvm.memcpy(dest, str, strlen(str)+1, 1) if (!isa<PointerType>(CI->getOperand(3)->getType())) return 0; Value *Len = EmitStrLen(CI->getOperand(3), B); Value *IncLen = B.CreateAdd(Len, - Context->getConstantInt(Len->getType(), 1), + ConstantInt::get(Len->getType(), 1), "leninc"); EmitMemCpy(CI->getOperand(1), CI->getOperand(3), IncLen, 1, B); - + // The sprintf result is the unincremented number of bytes in the string. return B.CreateIntCast(Len, CI->getType(), false); } @@ -1386,7 +1411,7 @@ struct VISIBILITY_HIDDEN SPrintFOpt : public LibCallOptimization { //===---------------------------------------===// // 'fwrite' Optimizations -struct VISIBILITY_HIDDEN FWriteOpt : public LibCallOptimization { +struct FWriteOpt : public LibCallOptimization { virtual Value *CallOptimizer(Function *Callee, CallInst *CI, IRBuilder<> &B) { // Require a pointer, an integer, an integer, a pointer, returning integer. const FunctionType *FT = Callee->getFunctionType(); @@ -1396,22 +1421,22 @@ struct VISIBILITY_HIDDEN FWriteOpt : public LibCallOptimization { !isa<PointerType>(FT->getParamType(3)) || !isa<IntegerType>(FT->getReturnType())) return 0; - + // Get the element size and count. ConstantInt *SizeC = dyn_cast<ConstantInt>(CI->getOperand(2)); ConstantInt *CountC = dyn_cast<ConstantInt>(CI->getOperand(3)); if (!SizeC || !CountC) return 0; uint64_t Bytes = SizeC->getZExtValue()*CountC->getZExtValue(); - + // If this is writing zero records, remove the call (it's a noop). if (Bytes == 0) - return Context->getConstantInt(CI->getType(), 0); - + return ConstantInt::get(CI->getType(), 0); + // If this is writing one byte, turn it into fputc. if (Bytes == 1) { // fwrite(S,1,1,F) -> fputc(S[0],F) Value *Char = B.CreateLoad(CastToCStr(CI->getOperand(1), B), "char"); EmitFPutC(Char, CI->getOperand(4), B); - return Context->getConstantInt(CI->getType(), 1); + return ConstantInt::get(CI->getType(), 1); } return 0; @@ -1421,20 +1446,23 @@ struct VISIBILITY_HIDDEN FWriteOpt : public LibCallOptimization { //===---------------------------------------===// // 'fputs' Optimizations -struct VISIBILITY_HIDDEN FPutsOpt : public LibCallOptimization { +struct FPutsOpt : public LibCallOptimization { virtual Value *CallOptimizer(Function *Callee, CallInst *CI, IRBuilder<> &B) { + // These optimizations require TargetData. + if (!TD) return 0; + // Require two pointers. Also, we can't optimize if return value is used. const FunctionType *FT = Callee->getFunctionType(); if (FT->getNumParams() != 2 || !isa<PointerType>(FT->getParamType(0)) || !isa<PointerType>(FT->getParamType(1)) || !CI->use_empty()) return 0; - + // fputs(s,F) --> fwrite(s,1,strlen(s),F) uint64_t Len = GetStringLength(CI->getOperand(1)); if (!Len) return 0; EmitFWrite(CI->getOperand(1), - Context->getConstantInt(TD->getIntPtrType(), Len-1), + ConstantInt::get(TD->getIntPtrType(*Context), Len-1), CI->getOperand(2), B); return CI; // Known to have no uses (see above). } @@ -1443,7 +1471,7 @@ struct VISIBILITY_HIDDEN FPutsOpt : public LibCallOptimization { //===---------------------------------------===// // 'fprintf' Optimizations -struct VISIBILITY_HIDDEN FPrintFOpt : public LibCallOptimization { +struct FPrintFOpt : public LibCallOptimization { virtual Value *CallOptimizer(Function *Callee, CallInst *CI, IRBuilder<> &B) { // Require two fixed paramters as pointers and integer result. const FunctionType *FT = Callee->getFunctionType(); @@ -1451,7 +1479,7 @@ struct VISIBILITY_HIDDEN FPrintFOpt : public LibCallOptimization { !isa<PointerType>(FT->getParamType(1)) || !isa<IntegerType>(FT->getReturnType())) return 0; - + // All the optimizations depend on the format string. std::string FormatStr; if (!GetConstantStringInfo(CI->getOperand(2), FormatStr)) @@ -1462,26 +1490,29 @@ struct VISIBILITY_HIDDEN FPrintFOpt : public LibCallOptimization { for (unsigned i = 0, e = FormatStr.size(); i != e; ++i) if (FormatStr[i] == '%') // Could handle %% -> % if we cared. return 0; // We found a format specifier. - - EmitFWrite(CI->getOperand(2), Context->getConstantInt(TD->getIntPtrType(), + + // These optimizations require TargetData. + if (!TD) return 0; + + EmitFWrite(CI->getOperand(2), ConstantInt::get(TD->getIntPtrType(*Context), FormatStr.size()), CI->getOperand(1), B); - return Context->getConstantInt(CI->getType(), FormatStr.size()); + return ConstantInt::get(CI->getType(), FormatStr.size()); } - + // The remaining optimizations require the format string to be "%s" or "%c" // and have an extra operand. if (FormatStr.size() != 2 || FormatStr[0] != '%' || CI->getNumOperands() <4) return 0; - + // Decode the second character of the format string. if (FormatStr[1] == 'c') { // fprintf(F, "%c", chr) --> *(i8*)dst = chr if (!isa<IntegerType>(CI->getOperand(3)->getType())) return 0; EmitFPutC(CI->getOperand(3), CI->getOperand(1), B); - return Context->getConstantInt(CI->getType(), 1); + return ConstantInt::get(CI->getType(), 1); } - + if (FormatStr[1] == 's') { // fprintf(F, "%s", str) -> fputs(str, F) if (!isa<PointerType>(CI->getOperand(3)->getType()) || !CI->use_empty()) @@ -1502,10 +1533,8 @@ struct VISIBILITY_HIDDEN FPrintFOpt : public LibCallOptimization { namespace { /// This pass optimizes well known library functions from libc and libm. /// - class VISIBILITY_HIDDEN SimplifyLibCalls : public FunctionPass { + class SimplifyLibCalls : public FunctionPass { StringMap<LibCallOptimization*> Optimizations; - // Miscellaneous LibCall Optimizations - ExitOpt Exit; // String and Memory LibCall Optimizations StrCatOpt StrCat; StrNCatOpt StrNCat; StrChrOpt StrChr; StrCmpOpt StrCmp; StrNCmpOpt StrNCmp; StrCpyOpt StrCpy; StrNCpyOpt StrNCpy; StrLenOpt StrLen; @@ -1536,7 +1565,6 @@ namespace { bool doInitialization(Module &M); virtual void getAnalysisUsage(AnalysisUsage &AU) const { - AU.addRequired<TargetData>(); } }; char SimplifyLibCalls::ID = 0; @@ -1547,15 +1575,12 @@ X("simplify-libcalls", "Simplify well-known library calls"); // Public interface to the Simplify LibCalls pass. FunctionPass *llvm::createSimplifyLibCallsPass() { - return new SimplifyLibCalls(); + return new SimplifyLibCalls(); } /// Optimizations - Populate the Optimizations map with all the optimizations /// we know. void SimplifyLibCalls::InitOptimizations() { - // Miscellaneous LibCall Optimizations - Optimizations["exit"] = &Exit; - // String and Memory LibCall Optimizations Optimizations["strcat"] = &StrCat; Optimizations["strncat"] = &StrNCat; @@ -1576,7 +1601,7 @@ void SimplifyLibCalls::InitOptimizations() { Optimizations["memcpy"] = &MemCpy; Optimizations["memmove"] = &MemMove; Optimizations["memset"] = &MemSet; - + // Math Library Optimizations Optimizations["powf"] = &Pow; Optimizations["pow"] = &Pow; @@ -1594,7 +1619,7 @@ void SimplifyLibCalls::InitOptimizations() { Optimizations["llvm.exp2.f80"] = &Exp2; Optimizations["llvm.exp2.f64"] = &Exp2; Optimizations["llvm.exp2.f32"] = &Exp2; - + #ifdef HAVE_FLOORF Optimizations["floor"] = &UnaryDoubleFP; #endif @@ -1610,7 +1635,7 @@ void SimplifyLibCalls::InitOptimizations() { #ifdef HAVE_NEARBYINTF Optimizations["nearbyint"] = &UnaryDoubleFP; #endif - + // Integer Optimizations Optimizations["ffs"] = &FFS; Optimizations["ffsl"] = &FFS; @@ -1621,7 +1646,7 @@ void SimplifyLibCalls::InitOptimizations() { Optimizations["isdigit"] = &IsDigit; Optimizations["isascii"] = &IsAscii; Optimizations["toascii"] = &ToAscii; - + // Formatting and IO Optimizations Optimizations["sprintf"] = &SPrintF; Optimizations["printf"] = &PrintF; @@ -1636,10 +1661,10 @@ void SimplifyLibCalls::InitOptimizations() { bool SimplifyLibCalls::runOnFunction(Function &F) { if (Optimizations.empty()) InitOptimizations(); - - const TargetData &TD = getAnalysis<TargetData>(); - - IRBuilder<> Builder; + + const TargetData *TD = getAnalysisIfAvailable<TargetData>(); + + IRBuilder<> Builder(F.getContext()); bool Changed = false; for (Function::iterator BB = F.begin(), E = F.end(); BB != E; ++BB) { @@ -1647,37 +1672,35 @@ bool SimplifyLibCalls::runOnFunction(Function &F) { // Ignore non-calls. CallInst *CI = dyn_cast<CallInst>(I++); if (!CI) continue; - + // Ignore indirect calls and calls to non-external functions. Function *Callee = CI->getCalledFunction(); if (Callee == 0 || !Callee->isDeclaration() || !(Callee->hasExternalLinkage() || Callee->hasDLLImportLinkage())) continue; - + // Ignore unknown calls. - const char *CalleeName = Callee->getNameStart(); - StringMap<LibCallOptimization*>::iterator OMI = - Optimizations.find(CalleeName, CalleeName+Callee->getNameLen()); - if (OMI == Optimizations.end()) continue; - + LibCallOptimization *LCO = Optimizations.lookup(Callee->getName()); + if (!LCO) continue; + // Set the builder to the instruction after the call. Builder.SetInsertPoint(BB, I); - + // Try to optimize this call. - Value *Result = OMI->second->OptimizeCall(CI, TD, Builder); + Value *Result = LCO->OptimizeCall(CI, TD, Builder); if (Result == 0) continue; - DEBUG(DOUT << "SimplifyLibCalls simplified: " << *CI; - DOUT << " into: " << *Result << "\n"); - + DEBUG(errs() << "SimplifyLibCalls simplified: " << *CI; + errs() << " into: " << *Result << "\n"); + // Something changed! Changed = true; ++NumSimplified; - + // Inspect the instruction after the call (which was potentially just // added) next. I = CI; ++I; - + if (CI != Result && !CI->use_empty()) { CI->replaceAllUsesWith(Result); if (!Result->hasName()) @@ -1736,40 +1759,39 @@ bool SimplifyLibCalls::doInitialization(Module &M) { if (!F.isDeclaration()) continue; - unsigned NameLen = F.getNameLen(); - if (!NameLen) + if (!F.hasName()) continue; const FunctionType *FTy = F.getFunctionType(); - const char *NameStr = F.getNameStart(); - switch (NameStr[0]) { + StringRef Name = F.getName(); + switch (Name[0]) { case 's': - if (NameLen == 6 && !strcmp(NameStr, "strlen")) { + if (Name == "strlen") { if (FTy->getNumParams() != 1 || !isa<PointerType>(FTy->getParamType(0))) continue; setOnlyReadsMemory(F); setDoesNotThrow(F); setDoesNotCapture(F, 1); - } else if ((NameLen == 6 && !strcmp(NameStr, "strcpy")) || - (NameLen == 6 && !strcmp(NameStr, "stpcpy")) || - (NameLen == 6 && !strcmp(NameStr, "strcat")) || - (NameLen == 6 && !strcmp(NameStr, "strtol")) || - (NameLen == 6 && !strcmp(NameStr, "strtod")) || - (NameLen == 6 && !strcmp(NameStr, "strtof")) || - (NameLen == 7 && !strcmp(NameStr, "strtoul")) || - (NameLen == 7 && !strcmp(NameStr, "strtoll")) || - (NameLen == 7 && !strcmp(NameStr, "strtold")) || - (NameLen == 7 && !strcmp(NameStr, "strncat")) || - (NameLen == 7 && !strcmp(NameStr, "strncpy")) || - (NameLen == 8 && !strcmp(NameStr, "strtoull"))) { + } else if (Name == "strcpy" || + Name == "stpcpy" || + Name == "strcat" || + Name == "strtol" || + Name == "strtod" || + Name == "strtof" || + Name == "strtoul" || + Name == "strtoll" || + Name == "strtold" || + Name == "strncat" || + Name == "strncpy" || + Name == "strtoull") { if (FTy->getNumParams() < 2 || !isa<PointerType>(FTy->getParamType(1))) continue; setDoesNotThrow(F); setDoesNotCapture(F, 2); - } else if (NameLen == 7 && !strcmp(NameStr, "strxfrm")) { + } else if (Name == "strxfrm") { if (FTy->getNumParams() != 3 || !isa<PointerType>(FTy->getParamType(0)) || !isa<PointerType>(FTy->getParamType(1))) @@ -1777,13 +1799,13 @@ bool SimplifyLibCalls::doInitialization(Module &M) { setDoesNotThrow(F); setDoesNotCapture(F, 1); setDoesNotCapture(F, 2); - } else if ((NameLen == 6 && !strcmp(NameStr, "strcmp")) || - (NameLen == 6 && !strcmp(NameStr, "strspn")) || - (NameLen == 7 && !strcmp(NameStr, "strncmp")) || - (NameLen == 7 && !strcmp(NameStr, "strcspn")) || - (NameLen == 7 && !strcmp(NameStr, "strcoll")) || - (NameLen == 10 && !strcmp(NameStr, "strcasecmp")) || - (NameLen == 11 && !strcmp(NameStr, "strncasecmp"))) { + } else if (Name == "strcmp" || + Name == "strspn" || + Name == "strncmp" || + Name ==" strcspn" || + Name == "strcoll" || + Name == "strcasecmp" || + Name == "strncasecmp") { if (FTy->getNumParams() < 2 || !isa<PointerType>(FTy->getParamType(0)) || !isa<PointerType>(FTy->getParamType(1))) @@ -1792,31 +1814,31 @@ bool SimplifyLibCalls::doInitialization(Module &M) { setDoesNotThrow(F); setDoesNotCapture(F, 1); setDoesNotCapture(F, 2); - } else if ((NameLen == 6 && !strcmp(NameStr, "strstr")) || - (NameLen == 7 && !strcmp(NameStr, "strpbrk"))) { + } else if (Name == "strstr" || + Name == "strpbrk") { if (FTy->getNumParams() != 2 || !isa<PointerType>(FTy->getParamType(1))) continue; setOnlyReadsMemory(F); setDoesNotThrow(F); setDoesNotCapture(F, 2); - } else if ((NameLen == 6 && !strcmp(NameStr, "strtok")) || - (NameLen == 8 && !strcmp(NameStr, "strtok_r"))) { + } else if (Name == "strtok" || + Name == "strtok_r") { if (FTy->getNumParams() < 2 || !isa<PointerType>(FTy->getParamType(1))) continue; setDoesNotThrow(F); setDoesNotCapture(F, 2); - } else if ((NameLen == 5 && !strcmp(NameStr, "scanf")) || - (NameLen == 6 && !strcmp(NameStr, "setbuf")) || - (NameLen == 7 && !strcmp(NameStr, "setvbuf"))) { + } else if (Name == "scanf" || + Name == "setbuf" || + Name == "setvbuf") { if (FTy->getNumParams() < 1 || !isa<PointerType>(FTy->getParamType(0))) continue; setDoesNotThrow(F); setDoesNotCapture(F, 1); - } else if ((NameLen == 6 && !strcmp(NameStr, "strdup")) || - (NameLen == 7 && !strcmp(NameStr, "strndup"))) { + } else if (Name == "strdup" || + Name == "strndup") { if (FTy->getNumParams() < 1 || !isa<PointerType>(FTy->getReturnType()) || !isa<PointerType>(FTy->getParamType(0))) @@ -1824,10 +1846,10 @@ bool SimplifyLibCalls::doInitialization(Module &M) { setDoesNotThrow(F); setDoesNotAlias(F, 0); setDoesNotCapture(F, 1); - } else if ((NameLen == 4 && !strcmp(NameStr, "stat")) || - (NameLen == 6 && !strcmp(NameStr, "sscanf")) || - (NameLen == 7 && !strcmp(NameStr, "sprintf")) || - (NameLen == 7 && !strcmp(NameStr, "statvfs"))) { + } else if (Name == "stat" || + Name == "sscanf" || + Name == "sprintf" || + Name == "statvfs") { if (FTy->getNumParams() < 2 || !isa<PointerType>(FTy->getParamType(0)) || !isa<PointerType>(FTy->getParamType(1))) @@ -1835,7 +1857,7 @@ bool SimplifyLibCalls::doInitialization(Module &M) { setDoesNotThrow(F); setDoesNotCapture(F, 1); setDoesNotCapture(F, 2); - } else if (NameLen == 8 && !strcmp(NameStr, "snprintf")) { + } else if (Name == "snprintf") { if (FTy->getNumParams() != 3 || !isa<PointerType>(FTy->getParamType(0)) || !isa<PointerType>(FTy->getParamType(2))) @@ -1843,7 +1865,7 @@ bool SimplifyLibCalls::doInitialization(Module &M) { setDoesNotThrow(F); setDoesNotCapture(F, 1); setDoesNotCapture(F, 3); - } else if (NameLen == 9 && !strcmp(NameStr, "setitimer")) { + } else if (Name == "setitimer") { if (FTy->getNumParams() != 3 || !isa<PointerType>(FTy->getParamType(1)) || !isa<PointerType>(FTy->getParamType(2))) @@ -1851,7 +1873,7 @@ bool SimplifyLibCalls::doInitialization(Module &M) { setDoesNotThrow(F); setDoesNotCapture(F, 2); setDoesNotCapture(F, 3); - } else if (NameLen == 6 && !strcmp(NameStr, "system")) { + } else if (Name == "system") { if (FTy->getNumParams() != 1 || !isa<PointerType>(FTy->getParamType(0))) continue; @@ -1860,7 +1882,13 @@ bool SimplifyLibCalls::doInitialization(Module &M) { } break; case 'm': - if (NameLen == 6 && !strcmp(NameStr, "memcmp")) { + if (Name == "malloc") { + if (FTy->getNumParams() != 1 || + !isa<PointerType>(FTy->getReturnType())) + continue; + setDoesNotThrow(F); + setDoesNotAlias(F, 0); + } else if (Name == "memcmp") { if (FTy->getNumParams() != 3 || !isa<PointerType>(FTy->getParamType(0)) || !isa<PointerType>(FTy->getParamType(1))) @@ -1869,29 +1897,29 @@ bool SimplifyLibCalls::doInitialization(Module &M) { setDoesNotThrow(F); setDoesNotCapture(F, 1); setDoesNotCapture(F, 2); - } else if ((NameLen == 6 && !strcmp(NameStr, "memchr")) || - (NameLen == 7 && !strcmp(NameStr, "memrchr"))) { + } else if (Name == "memchr" || + Name == "memrchr") { if (FTy->getNumParams() != 3) continue; setOnlyReadsMemory(F); setDoesNotThrow(F); - } else if ((NameLen == 4 && !strcmp(NameStr, "modf")) || - (NameLen == 5 && !strcmp(NameStr, "modff")) || - (NameLen == 5 && !strcmp(NameStr, "modfl")) || - (NameLen == 6 && !strcmp(NameStr, "memcpy")) || - (NameLen == 7 && !strcmp(NameStr, "memccpy")) || - (NameLen == 7 && !strcmp(NameStr, "memmove"))) { + } else if (Name == "modf" || + Name == "modff" || + Name == "modfl" || + Name == "memcpy" || + Name == "memccpy" || + Name == "memmove") { if (FTy->getNumParams() < 2 || !isa<PointerType>(FTy->getParamType(1))) continue; setDoesNotThrow(F); setDoesNotCapture(F, 2); - } else if (NameLen == 8 && !strcmp(NameStr, "memalign")) { + } else if (Name == "memalign") { if (!isa<PointerType>(FTy->getReturnType())) continue; setDoesNotAlias(F, 0); - } else if ((NameLen == 5 && !strcmp(NameStr, "mkdir")) || - (NameLen == 6 && !strcmp(NameStr, "mktime"))) { + } else if (Name == "mkdir" || + Name == "mktime") { if (FTy->getNumParams() == 0 || !isa<PointerType>(FTy->getParamType(0))) continue; @@ -1900,7 +1928,7 @@ bool SimplifyLibCalls::doInitialization(Module &M) { } break; case 'r': - if (NameLen == 7 && !strcmp(NameStr, "realloc")) { + if (Name == "realloc") { if (FTy->getNumParams() != 2 || !isa<PointerType>(FTy->getParamType(0)) || !isa<PointerType>(FTy->getReturnType())) @@ -1908,23 +1936,23 @@ bool SimplifyLibCalls::doInitialization(Module &M) { setDoesNotThrow(F); setDoesNotAlias(F, 0); setDoesNotCapture(F, 1); - } else if (NameLen == 4 && !strcmp(NameStr, "read")) { + } else if (Name == "read") { if (FTy->getNumParams() != 3 || !isa<PointerType>(FTy->getParamType(1))) continue; // May throw; "read" is a valid pthread cancellation point. setDoesNotCapture(F, 2); - } else if ((NameLen == 5 && !strcmp(NameStr, "rmdir")) || - (NameLen == 6 && !strcmp(NameStr, "rewind")) || - (NameLen == 6 && !strcmp(NameStr, "remove")) || - (NameLen == 8 && !strcmp(NameStr, "realpath"))) { + } else if (Name == "rmdir" || + Name == "rewind" || + Name == "remove" || + Name == "realpath") { if (FTy->getNumParams() < 1 || !isa<PointerType>(FTy->getParamType(0))) continue; setDoesNotThrow(F); setDoesNotCapture(F, 1); - } else if ((NameLen == 6 && !strcmp(NameStr, "rename")) || - (NameLen == 8 && !strcmp(NameStr, "readlink"))) { + } else if (Name == "rename" || + Name == "readlink") { if (FTy->getNumParams() < 2 || !isa<PointerType>(FTy->getParamType(0)) || !isa<PointerType>(FTy->getParamType(1))) @@ -1935,7 +1963,7 @@ bool SimplifyLibCalls::doInitialization(Module &M) { } break; case 'w': - if (NameLen == 5 && !strcmp(NameStr, "write")) { + if (Name == "write") { if (FTy->getNumParams() != 3 || !isa<PointerType>(FTy->getParamType(1))) continue; @@ -1944,7 +1972,7 @@ bool SimplifyLibCalls::doInitialization(Module &M) { } break; case 'b': - if (NameLen == 5 && !strcmp(NameStr, "bcopy")) { + if (Name == "bcopy") { if (FTy->getNumParams() != 3 || !isa<PointerType>(FTy->getParamType(0)) || !isa<PointerType>(FTy->getParamType(1))) @@ -1952,7 +1980,7 @@ bool SimplifyLibCalls::doInitialization(Module &M) { setDoesNotThrow(F); setDoesNotCapture(F, 1); setDoesNotCapture(F, 2); - } else if (NameLen == 4 && !strcmp(NameStr, "bcmp")) { + } else if (Name == "bcmp") { if (FTy->getNumParams() != 3 || !isa<PointerType>(FTy->getParamType(0)) || !isa<PointerType>(FTy->getParamType(1))) @@ -1961,7 +1989,7 @@ bool SimplifyLibCalls::doInitialization(Module &M) { setOnlyReadsMemory(F); setDoesNotCapture(F, 1); setDoesNotCapture(F, 2); - } else if (NameLen == 5 && !strcmp(NameStr, "bzero")) { + } else if (Name == "bzero") { if (FTy->getNumParams() != 2 || !isa<PointerType>(FTy->getParamType(0))) continue; @@ -1970,17 +1998,17 @@ bool SimplifyLibCalls::doInitialization(Module &M) { } break; case 'c': - if (NameLen == 6 && !strcmp(NameStr, "calloc")) { + if (Name == "calloc") { if (FTy->getNumParams() != 2 || !isa<PointerType>(FTy->getReturnType())) continue; setDoesNotThrow(F); setDoesNotAlias(F, 0); - } else if ((NameLen == 5 && !strcmp(NameStr, "chmod")) || - (NameLen == 5 && !strcmp(NameStr, "chown")) || - (NameLen == 7 && !strcmp(NameStr, "ctermid")) || - (NameLen == 8 && !strcmp(NameStr, "clearerr")) || - (NameLen == 8 && !strcmp(NameStr, "closedir"))) { + } else if (Name == "chmod" || + Name == "chown" || + Name == "ctermid" || + Name == "clearerr" || + Name == "closedir") { if (FTy->getNumParams() == 0 || !isa<PointerType>(FTy->getParamType(0))) continue; @@ -1989,17 +2017,17 @@ bool SimplifyLibCalls::doInitialization(Module &M) { } break; case 'a': - if ((NameLen == 4 && !strcmp(NameStr, "atoi")) || - (NameLen == 4 && !strcmp(NameStr, "atol")) || - (NameLen == 4 && !strcmp(NameStr, "atof")) || - (NameLen == 5 && !strcmp(NameStr, "atoll"))) { + if (Name == "atoi" || + Name == "atol" || + Name == "atof" || + Name == "atoll") { if (FTy->getNumParams() != 1 || !isa<PointerType>(FTy->getParamType(0))) continue; setDoesNotThrow(F); setOnlyReadsMemory(F); setDoesNotCapture(F, 1); - } else if (NameLen == 6 && !strcmp(NameStr, "access")) { + } else if (Name == "access") { if (FTy->getNumParams() != 2 || !isa<PointerType>(FTy->getParamType(0))) continue; @@ -2008,7 +2036,7 @@ bool SimplifyLibCalls::doInitialization(Module &M) { } break; case 'f': - if (NameLen == 5 && !strcmp(NameStr, "fopen")) { + if (Name == "fopen") { if (FTy->getNumParams() != 2 || !isa<PointerType>(FTy->getReturnType()) || !isa<PointerType>(FTy->getParamType(0)) || @@ -2018,7 +2046,7 @@ bool SimplifyLibCalls::doInitialization(Module &M) { setDoesNotAlias(F, 0); setDoesNotCapture(F, 1); setDoesNotCapture(F, 2); - } else if (NameLen == 6 && !strcmp(NameStr, "fdopen")) { + } else if (Name == "fdopen") { if (FTy->getNumParams() != 2 || !isa<PointerType>(FTy->getReturnType()) || !isa<PointerType>(FTy->getParamType(1))) @@ -2026,52 +2054,52 @@ bool SimplifyLibCalls::doInitialization(Module &M) { setDoesNotThrow(F); setDoesNotAlias(F, 0); setDoesNotCapture(F, 2); - } else if ((NameLen == 4 && !strcmp(NameStr, "feof")) || - (NameLen == 4 && !strcmp(NameStr, "free")) || - (NameLen == 5 && !strcmp(NameStr, "fseek")) || - (NameLen == 5 && !strcmp(NameStr, "ftell")) || - (NameLen == 5 && !strcmp(NameStr, "fgetc")) || - (NameLen == 6 && !strcmp(NameStr, "fseeko")) || - (NameLen == 6 && !strcmp(NameStr, "ftello")) || - (NameLen == 6 && !strcmp(NameStr, "fileno")) || - (NameLen == 6 && !strcmp(NameStr, "fflush")) || - (NameLen == 6 && !strcmp(NameStr, "fclose")) || - (NameLen == 7 && !strcmp(NameStr, "fsetpos")) || - (NameLen == 9 && !strcmp(NameStr, "flockfile")) || - (NameLen == 11 && !strcmp(NameStr, "funlockfile")) || - (NameLen == 12 && !strcmp(NameStr, "ftrylockfile"))) { + } else if (Name == "feof" || + Name == "free" || + Name == "fseek" || + Name == "ftell" || + Name == "fgetc" || + Name == "fseeko" || + Name == "ftello" || + Name == "fileno" || + Name == "fflush" || + Name == "fclose" || + Name == "fsetpos" || + Name == "flockfile" || + Name == "funlockfile" || + Name == "ftrylockfile") { if (FTy->getNumParams() == 0 || !isa<PointerType>(FTy->getParamType(0))) continue; setDoesNotThrow(F); setDoesNotCapture(F, 1); - } else if (NameLen == 6 && !strcmp(NameStr, "ferror")) { + } else if (Name == "ferror") { if (FTy->getNumParams() != 1 || !isa<PointerType>(FTy->getParamType(0))) continue; setDoesNotThrow(F); setDoesNotCapture(F, 1); setOnlyReadsMemory(F); - } else if ((NameLen == 5 && !strcmp(NameStr, "fputc")) || - (NameLen == 5 && !strcmp(NameStr, "fstat")) || - (NameLen == 5 && !strcmp(NameStr, "frexp")) || - (NameLen == 6 && !strcmp(NameStr, "frexpf")) || - (NameLen == 6 && !strcmp(NameStr, "frexpl")) || - (NameLen == 8 && !strcmp(NameStr, "fstatvfs"))) { + } else if (Name == "fputc" || + Name == "fstat" || + Name == "frexp" || + Name == "frexpf" || + Name == "frexpl" || + Name == "fstatvfs") { if (FTy->getNumParams() != 2 || !isa<PointerType>(FTy->getParamType(1))) continue; setDoesNotThrow(F); setDoesNotCapture(F, 2); - } else if (NameLen == 5 && !strcmp(NameStr, "fgets")) { + } else if (Name == "fgets") { if (FTy->getNumParams() != 3 || !isa<PointerType>(FTy->getParamType(0)) || !isa<PointerType>(FTy->getParamType(2))) continue; setDoesNotThrow(F); setDoesNotCapture(F, 3); - } else if ((NameLen == 5 && !strcmp(NameStr, "fread")) || - (NameLen == 6 && !strcmp(NameStr, "fwrite"))) { + } else if (Name == "fread" || + Name == "fwrite") { if (FTy->getNumParams() != 4 || !isa<PointerType>(FTy->getParamType(0)) || !isa<PointerType>(FTy->getParamType(3))) @@ -2079,10 +2107,10 @@ bool SimplifyLibCalls::doInitialization(Module &M) { setDoesNotThrow(F); setDoesNotCapture(F, 1); setDoesNotCapture(F, 4); - } else if ((NameLen == 5 && !strcmp(NameStr, "fputs")) || - (NameLen == 6 && !strcmp(NameStr, "fscanf")) || - (NameLen == 7 && !strcmp(NameStr, "fprintf")) || - (NameLen == 7 && !strcmp(NameStr, "fgetpos"))) { + } else if (Name == "fputs" || + Name == "fscanf" || + Name == "fprintf" || + Name == "fgetpos") { if (FTy->getNumParams() < 2 || !isa<PointerType>(FTy->getParamType(0)) || !isa<PointerType>(FTy->getParamType(1))) @@ -2093,31 +2121,31 @@ bool SimplifyLibCalls::doInitialization(Module &M) { } break; case 'g': - if ((NameLen == 4 && !strcmp(NameStr, "getc")) || - (NameLen == 10 && !strcmp(NameStr, "getlogin_r")) || - (NameLen == 13 && !strcmp(NameStr, "getc_unlocked"))) { + if (Name == "getc" || + Name == "getlogin_r" || + Name == "getc_unlocked") { if (FTy->getNumParams() == 0 || !isa<PointerType>(FTy->getParamType(0))) continue; setDoesNotThrow(F); setDoesNotCapture(F, 1); - } else if (NameLen == 6 && !strcmp(NameStr, "getenv")) { + } else if (Name == "getenv") { if (FTy->getNumParams() != 1 || !isa<PointerType>(FTy->getParamType(0))) continue; setDoesNotThrow(F); setOnlyReadsMemory(F); setDoesNotCapture(F, 1); - } else if ((NameLen == 4 && !strcmp(NameStr, "gets")) || - (NameLen == 7 && !strcmp(NameStr, "getchar"))) { + } else if (Name == "gets" || + Name == "getchar") { setDoesNotThrow(F); - } else if (NameLen == 9 && !strcmp(NameStr, "getitimer")) { + } else if (Name == "getitimer") { if (FTy->getNumParams() != 2 || !isa<PointerType>(FTy->getParamType(1))) continue; setDoesNotThrow(F); setDoesNotCapture(F, 2); - } else if (NameLen == 8 && !strcmp(NameStr, "getpwnam")) { + } else if (Name == "getpwnam") { if (FTy->getNumParams() != 1 || !isa<PointerType>(FTy->getParamType(0))) continue; @@ -2126,22 +2154,22 @@ bool SimplifyLibCalls::doInitialization(Module &M) { } break; case 'u': - if (NameLen == 6 && !strcmp(NameStr, "ungetc")) { + if (Name == "ungetc") { if (FTy->getNumParams() != 2 || !isa<PointerType>(FTy->getParamType(1))) continue; setDoesNotThrow(F); setDoesNotCapture(F, 2); - } else if ((NameLen == 5 && !strcmp(NameStr, "uname")) || - (NameLen == 6 && !strcmp(NameStr, "unlink")) || - (NameLen == 8 && !strcmp(NameStr, "unsetenv"))) { + } else if (Name == "uname" || + Name == "unlink" || + Name == "unsetenv") { if (FTy->getNumParams() != 1 || !isa<PointerType>(FTy->getParamType(0))) continue; setDoesNotThrow(F); setDoesNotCapture(F, 1); - } else if ((NameLen == 5 && !strcmp(NameStr, "utime")) || - (NameLen == 6 && !strcmp(NameStr, "utimes"))) { + } else if (Name == "utime" || + Name == "utimes") { if (FTy->getNumParams() != 2 || !isa<PointerType>(FTy->getParamType(0)) || !isa<PointerType>(FTy->getParamType(1))) @@ -2152,30 +2180,30 @@ bool SimplifyLibCalls::doInitialization(Module &M) { } break; case 'p': - if (NameLen == 4 && !strcmp(NameStr, "putc")) { + if (Name == "putc") { if (FTy->getNumParams() != 2 || !isa<PointerType>(FTy->getParamType(1))) continue; setDoesNotThrow(F); setDoesNotCapture(F, 2); - } else if ((NameLen == 4 && !strcmp(NameStr, "puts")) || - (NameLen == 6 && !strcmp(NameStr, "printf")) || - (NameLen == 6 && !strcmp(NameStr, "perror"))) { + } else if (Name == "puts" || + Name == "printf" || + Name == "perror") { if (FTy->getNumParams() != 1 || !isa<PointerType>(FTy->getParamType(0))) continue; setDoesNotThrow(F); setDoesNotCapture(F, 1); - } else if ((NameLen == 5 && !strcmp(NameStr, "pread")) || - (NameLen == 6 && !strcmp(NameStr, "pwrite"))) { + } else if (Name == "pread" || + Name == "pwrite") { if (FTy->getNumParams() != 4 || !isa<PointerType>(FTy->getParamType(1))) continue; // May throw; these are valid pthread cancellation points. setDoesNotCapture(F, 2); - } else if (NameLen == 7 && !strcmp(NameStr, "putchar")) { + } else if (Name == "putchar") { setDoesNotThrow(F); - } else if (NameLen == 5 && !strcmp(NameStr, "popen")) { + } else if (Name == "popen") { if (FTy->getNumParams() != 2 || !isa<PointerType>(FTy->getReturnType()) || !isa<PointerType>(FTy->getParamType(0)) || @@ -2185,7 +2213,7 @@ bool SimplifyLibCalls::doInitialization(Module &M) { setDoesNotAlias(F, 0); setDoesNotCapture(F, 1); setDoesNotCapture(F, 2); - } else if (NameLen == 6 && !strcmp(NameStr, "pclose")) { + } else if (Name == "pclose") { if (FTy->getNumParams() != 1 || !isa<PointerType>(FTy->getParamType(0))) continue; @@ -2194,14 +2222,14 @@ bool SimplifyLibCalls::doInitialization(Module &M) { } break; case 'v': - if (NameLen == 6 && !strcmp(NameStr, "vscanf")) { + if (Name == "vscanf") { if (FTy->getNumParams() != 2 || !isa<PointerType>(FTy->getParamType(1))) continue; setDoesNotThrow(F); setDoesNotCapture(F, 1); - } else if ((NameLen == 7 && !strcmp(NameStr, "vsscanf")) || - (NameLen == 7 && !strcmp(NameStr, "vfscanf"))) { + } else if (Name == "vsscanf" || + Name == "vfscanf") { if (FTy->getNumParams() != 3 || !isa<PointerType>(FTy->getParamType(1)) || !isa<PointerType>(FTy->getParamType(2))) @@ -2209,19 +2237,19 @@ bool SimplifyLibCalls::doInitialization(Module &M) { setDoesNotThrow(F); setDoesNotCapture(F, 1); setDoesNotCapture(F, 2); - } else if (NameLen == 6 && !strcmp(NameStr, "valloc")) { + } else if (Name == "valloc") { if (!isa<PointerType>(FTy->getReturnType())) continue; setDoesNotThrow(F); setDoesNotAlias(F, 0); - } else if (NameLen == 7 && !strcmp(NameStr, "vprintf")) { + } else if (Name == "vprintf") { if (FTy->getNumParams() != 2 || !isa<PointerType>(FTy->getParamType(0))) continue; setDoesNotThrow(F); setDoesNotCapture(F, 1); - } else if ((NameLen == 8 && !strcmp(NameStr, "vfprintf")) || - (NameLen == 8 && !strcmp(NameStr, "vsprintf"))) { + } else if (Name == "vfprintf" || + Name == "vsprintf") { if (FTy->getNumParams() != 3 || !isa<PointerType>(FTy->getParamType(0)) || !isa<PointerType>(FTy->getParamType(1))) @@ -2229,7 +2257,7 @@ bool SimplifyLibCalls::doInitialization(Module &M) { setDoesNotThrow(F); setDoesNotCapture(F, 1); setDoesNotCapture(F, 2); - } else if (NameLen == 9 && !strcmp(NameStr, "vsnprintf")) { + } else if (Name == "vsnprintf") { if (FTy->getNumParams() != 4 || !isa<PointerType>(FTy->getParamType(0)) || !isa<PointerType>(FTy->getParamType(2))) @@ -2240,13 +2268,13 @@ bool SimplifyLibCalls::doInitialization(Module &M) { } break; case 'o': - if (NameLen == 4 && !strcmp(NameStr, "open")) { + if (Name == "open") { if (FTy->getNumParams() < 2 || !isa<PointerType>(FTy->getParamType(0))) continue; // May throw; "open" is a valid pthread cancellation point. setDoesNotCapture(F, 1); - } else if (NameLen == 7 && !strcmp(NameStr, "opendir")) { + } else if (Name == "opendir") { if (FTy->getNumParams() != 1 || !isa<PointerType>(FTy->getReturnType()) || !isa<PointerType>(FTy->getParamType(0))) @@ -2257,12 +2285,12 @@ bool SimplifyLibCalls::doInitialization(Module &M) { } break; case 't': - if (NameLen == 7 && !strcmp(NameStr, "tmpfile")) { + if (Name == "tmpfile") { if (!isa<PointerType>(FTy->getReturnType())) continue; setDoesNotThrow(F); setDoesNotAlias(F, 0); - } else if (NameLen == 5 && !strcmp(NameStr, "times")) { + } else if (Name == "times") { if (FTy->getNumParams() != 1 || !isa<PointerType>(FTy->getParamType(0))) continue; @@ -2271,21 +2299,21 @@ bool SimplifyLibCalls::doInitialization(Module &M) { } break; case 'h': - if ((NameLen == 5 && !strcmp(NameStr, "htonl")) || - (NameLen == 5 && !strcmp(NameStr, "htons"))) { + if (Name == "htonl" || + Name == "htons") { setDoesNotThrow(F); setDoesNotAccessMemory(F); } break; case 'n': - if ((NameLen == 5 && !strcmp(NameStr, "ntohl")) || - (NameLen == 5 && !strcmp(NameStr, "ntohs"))) { + if (Name == "ntohl" || + Name == "ntohs") { setDoesNotThrow(F); setDoesNotAccessMemory(F); } break; case 'l': - if (NameLen == 5 && !strcmp(NameStr, "lstat")) { + if (Name == "lstat") { if (FTy->getNumParams() != 2 || !isa<PointerType>(FTy->getParamType(0)) || !isa<PointerType>(FTy->getParamType(1))) @@ -2293,7 +2321,7 @@ bool SimplifyLibCalls::doInitialization(Module &M) { setDoesNotThrow(F); setDoesNotCapture(F, 1); setDoesNotCapture(F, 2); - } else if (NameLen == 6 && !strcmp(NameStr, "lchown")) { + } else if (Name == "lchown") { if (FTy->getNumParams() != 3 || !isa<PointerType>(FTy->getParamType(0))) continue; @@ -2302,7 +2330,7 @@ bool SimplifyLibCalls::doInitialization(Module &M) { } break; case 'q': - if (NameLen == 5 && !strcmp(NameStr, "qsort")) { + if (Name == "qsort") { if (FTy->getNumParams() != 4 || !isa<PointerType>(FTy->getParamType(3))) continue; @@ -2311,8 +2339,8 @@ bool SimplifyLibCalls::doInitialization(Module &M) { } break; case '_': - if ((NameLen == 8 && !strcmp(NameStr, "__strdup")) || - (NameLen == 9 && !strcmp(NameStr, "__strndup"))) { + if (Name == "__strdup" || + Name == "__strndup") { if (FTy->getNumParams() < 1 || !isa<PointerType>(FTy->getReturnType()) || !isa<PointerType>(FTy->getParamType(0))) @@ -2320,19 +2348,19 @@ bool SimplifyLibCalls::doInitialization(Module &M) { setDoesNotThrow(F); setDoesNotAlias(F, 0); setDoesNotCapture(F, 1); - } else if (NameLen == 10 && !strcmp(NameStr, "__strtok_r")) { + } else if (Name == "__strtok_r") { if (FTy->getNumParams() != 3 || !isa<PointerType>(FTy->getParamType(1))) continue; setDoesNotThrow(F); setDoesNotCapture(F, 2); - } else if (NameLen == 8 && !strcmp(NameStr, "_IO_getc")) { + } else if (Name == "_IO_getc") { if (FTy->getNumParams() != 1 || !isa<PointerType>(FTy->getParamType(0))) continue; setDoesNotThrow(F); setDoesNotCapture(F, 1); - } else if (NameLen == 8 && !strcmp(NameStr, "_IO_putc")) { + } else if (Name == "_IO_putc") { if (FTy->getNumParams() != 2 || !isa<PointerType>(FTy->getParamType(1))) continue; @@ -2341,16 +2369,16 @@ bool SimplifyLibCalls::doInitialization(Module &M) { } break; case 1: - if (NameLen == 15 && !strcmp(NameStr, "\1__isoc99_scanf")) { + if (Name == "\1__isoc99_scanf") { if (FTy->getNumParams() < 1 || !isa<PointerType>(FTy->getParamType(0))) continue; setDoesNotThrow(F); setDoesNotCapture(F, 1); - } else if ((NameLen == 7 && !strcmp(NameStr, "\1stat64")) || - (NameLen == 8 && !strcmp(NameStr, "\1lstat64")) || - (NameLen == 10 && !strcmp(NameStr, "\1statvfs64")) || - (NameLen == 16 && !strcmp(NameStr, "\1__isoc99_sscanf"))) { + } else if (Name == "\1stat64" || + Name == "\1lstat64" || + Name == "\1statvfs64" || + Name == "\1__isoc99_sscanf") { if (FTy->getNumParams() < 1 || !isa<PointerType>(FTy->getParamType(0)) || !isa<PointerType>(FTy->getParamType(1))) @@ -2358,7 +2386,7 @@ bool SimplifyLibCalls::doInitialization(Module &M) { setDoesNotThrow(F); setDoesNotCapture(F, 1); setDoesNotCapture(F, 2); - } else if (NameLen == 8 && !strcmp(NameStr, "\1fopen64")) { + } else if (Name == "\1fopen64") { if (FTy->getNumParams() != 2 || !isa<PointerType>(FTy->getReturnType()) || !isa<PointerType>(FTy->getParamType(0)) || @@ -2368,26 +2396,26 @@ bool SimplifyLibCalls::doInitialization(Module &M) { setDoesNotAlias(F, 0); setDoesNotCapture(F, 1); setDoesNotCapture(F, 2); - } else if ((NameLen == 9 && !strcmp(NameStr, "\1fseeko64")) || - (NameLen == 9 && !strcmp(NameStr, "\1ftello64"))) { + } else if (Name == "\1fseeko64" || + Name == "\1ftello64") { if (FTy->getNumParams() == 0 || !isa<PointerType>(FTy->getParamType(0))) continue; setDoesNotThrow(F); setDoesNotCapture(F, 1); - } else if (NameLen == 10 && !strcmp(NameStr, "\1tmpfile64")) { + } else if (Name == "\1tmpfile64") { if (!isa<PointerType>(FTy->getReturnType())) continue; setDoesNotThrow(F); setDoesNotAlias(F, 0); - } else if ((NameLen == 8 && !strcmp(NameStr, "\1fstat64")) || - (NameLen == 11 && !strcmp(NameStr, "\1fstatvfs64"))) { + } else if (Name == "\1fstat64" || + Name == "\1fstatvfs64") { if (FTy->getNumParams() != 2 || !isa<PointerType>(FTy->getParamType(1))) continue; setDoesNotThrow(F); setDoesNotCapture(F, 2); - } else if (NameLen == 7 && !strcmp(NameStr, "\1open64")) { + } else if (Name == "\1open64") { if (FTy->getNumParams() < 2 || !isa<PointerType>(FTy->getParamType(0))) continue; |
