diff options
Diffstat (limited to 'llvm/lib/Transforms/Utils/SimplifyLibCalls.cpp')
| -rw-r--r-- | llvm/lib/Transforms/Utils/SimplifyLibCalls.cpp | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/llvm/lib/Transforms/Utils/SimplifyLibCalls.cpp b/llvm/lib/Transforms/Utils/SimplifyLibCalls.cpp index 7ff1f4a..1f397c0 100644 --- a/llvm/lib/Transforms/Utils/SimplifyLibCalls.cpp +++ b/llvm/lib/Transforms/Utils/SimplifyLibCalls.cpp @@ -998,6 +998,15 @@ Value *LibCallSimplifier::optimizeMemCpy(CallInst *CI, IRBuilder<> &B, return CI->getArgOperand(0); } +Value *LibCallSimplifier::optimizeMemPCpy(CallInst *CI, IRBuilder<> &B) { + Value *Dst = CI->getArgOperand(0); + Value *N = CI->getArgOperand(2); + // mempcpy(x, y, n) -> llvm.memcpy(align 1 x, align 1 y, n), x + n + CallInst *NewCI = B.CreateMemCpy(Dst, 1, CI->getArgOperand(1), 1, N); + NewCI->setAttributes(CI->getAttributes()); + return B.CreateInBoundsGEP(B.getInt8Ty(), Dst, N); +} + Value *LibCallSimplifier::optimizeMemMove(CallInst *CI, IRBuilder<> &B, bool isIntrinsic) { Value *Size = CI->getArgOperand(2); if (ConstantInt *LenC = dyn_cast<ConstantInt>(Size)) @@ -2624,6 +2633,8 @@ Value *LibCallSimplifier::optimizeStringMemoryLibCall(CallInst *CI, return optimizeMemCmp(CI, Builder); case LibFunc_memcpy: return optimizeMemCpy(CI, Builder); + case LibFunc_mempcpy: + return optimizeMemPCpy(CI, Builder); case LibFunc_memmove: return optimizeMemMove(CI, Builder); case LibFunc_memset: |