diff options
Diffstat (limited to 'lib/Transforms/Utils/SimplifyLibCalls.cpp')
| -rw-r--r-- | lib/Transforms/Utils/SimplifyLibCalls.cpp | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/lib/Transforms/Utils/SimplifyLibCalls.cpp b/lib/Transforms/Utils/SimplifyLibCalls.cpp index 83c74e7519..cccf0a67a6 100644 --- a/lib/Transforms/Utils/SimplifyLibCalls.cpp +++ b/lib/Transforms/Utils/SimplifyLibCalls.cpp @@ -50,6 +50,10 @@ public: virtual Value *callOptimizer(Function *Callee, CallInst *CI, IRBuilder<> &B) =0; + /// ignoreCallingConv - Returns false if this transformation could possibly + /// change the calling convention. + virtual bool ignoreCallingConv() { return false; } + Value *optimizeCall(CallInst *CI, const DataLayout *TD, const TargetLibraryInfo *TLI, const LibCallSimplifier *LCS, IRBuilder<> &B) { @@ -61,7 +65,7 @@ public: Context = &CI->getCalledFunction()->getContext(); // We never change the calling convention. - if (CI->getCallingConv() != llvm::CallingConv::C) + if (!ignoreCallingConv() && CI->getCallingConv() != llvm::CallingConv::C) return NULL; return callOptimizer(CI->getCalledFunction(), CI, B); @@ -724,6 +728,7 @@ struct StrNCpyOpt : public LibCallOptimization { }; struct StrLenOpt : public LibCallOptimization { + virtual bool ignoreCallingConv() { return true; } virtual Value *callOptimizer(Function *Callee, CallInst *CI, IRBuilder<> &B) { FunctionType *FT = Callee->getFunctionType(); if (FT->getNumParams() != 1 || @@ -1260,6 +1265,7 @@ struct FFSOpt : public LibCallOptimization { }; struct AbsOpt : public LibCallOptimization { + virtual bool ignoreCallingConv() { return true; } virtual Value *callOptimizer(Function *Callee, CallInst *CI, IRBuilder<> &B) { FunctionType *FT = Callee->getFunctionType(); // We require integer(integer) where the types agree. |