diff options
Diffstat (limited to 'lib/Transforms/Scalar/SimplifyLibCalls.cpp')
| -rw-r--r-- | lib/Transforms/Scalar/SimplifyLibCalls.cpp | 47 |
1 files changed, 1 insertions, 46 deletions
diff --git a/lib/Transforms/Scalar/SimplifyLibCalls.cpp b/lib/Transforms/Scalar/SimplifyLibCalls.cpp index d86c4cbc9f6..90efa8ae0e0 100644 --- a/lib/Transforms/Scalar/SimplifyLibCalls.cpp +++ b/lib/Transforms/Scalar/SimplifyLibCalls.cpp @@ -135,47 +135,6 @@ static bool IsOnlyUsedInEqualityComparison(Value *V, Value *With) { namespace { //===---------------------------------------===// -// 'strcpy' Optimizations - -struct StrCpyOpt : public LibCallOptimization { - bool OptChkCall; // True if it's optimizing a __strcpy_chk libcall. - - StrCpyOpt(bool c) : OptChkCall(c) {} - - virtual Value *CallOptimizer(Function *Callee, CallInst *CI, IRBuilder<> &B) { - // Verify the "strcpy" function prototype. - unsigned NumParams = OptChkCall ? 3 : 2; - FunctionType *FT = Callee->getFunctionType(); - if (FT->getNumParams() != NumParams || - FT->getReturnType() != FT->getParamType(0) || - FT->getParamType(0) != FT->getParamType(1) || - FT->getParamType(0) != B.getInt8PtrTy()) - return 0; - - Value *Dst = CI->getArgOperand(0), *Src = CI->getArgOperand(1); - if (Dst == Src) // strcpy(x,x) -> x - return Src; - - // These optimizations require DataLayout. - 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. - if (!OptChkCall || - !EmitMemCpyChk(Dst, Src, - ConstantInt::get(TD->getIntPtrType(*Context), Len), - CI->getArgOperand(2), B, TD, TLI)) - B.CreateMemCpy(Dst, Src, - ConstantInt::get(TD->getIntPtrType(*Context), Len), 1); - return Dst; - } -}; - -//===---------------------------------------===// // 'stpcpy' Optimizations struct StpCpyOpt: public LibCallOptimization { @@ -1275,7 +1234,6 @@ namespace { StringMap<LibCallOptimization*> Optimizations; // String and Memory LibCall Optimizations - StrCpyOpt StrCpy; StrCpyOpt StrCpyChk; StpCpyOpt StpCpy; StpCpyOpt StpCpyChk; StrNCpyOpt StrNCpy; StrLenOpt StrLen; StrPBrkOpt StrPBrk; @@ -1295,8 +1253,7 @@ namespace { bool Modified; // This is only used by doInitialization. public: static char ID; // Pass identification - SimplifyLibCalls() : FunctionPass(ID), StrCpy(false), StrCpyChk(true), - StpCpy(false), StpCpyChk(true), + SimplifyLibCalls() : FunctionPass(ID), StpCpy(false), StpCpyChk(true), UnaryDoubleFP(false), UnsafeUnaryDoubleFP(true) { initializeSimplifyLibCallsPass(*PassRegistry::getPassRegistry()); } @@ -1348,7 +1305,6 @@ void SimplifyLibCalls::AddOpt(LibFunc::Func F1, LibFunc::Func F2, /// we know. void SimplifyLibCalls::InitOptimizations() { // String and Memory LibCall Optimizations - Optimizations["strcpy"] = &StrCpy; Optimizations["strncpy"] = &StrNCpy; Optimizations["stpcpy"] = &StpCpy; Optimizations["strlen"] = &StrLen; @@ -1369,7 +1325,6 @@ void SimplifyLibCalls::InitOptimizations() { AddOpt(LibFunc::memset, &MemSet); // _chk variants of String and Memory LibCall Optimizations. - Optimizations["__strcpy_chk"] = &StrCpyChk; Optimizations["__stpcpy_chk"] = &StpCpyChk; // Math Library Optimizations |