diff options
Diffstat (limited to 'llvm/lib/Transforms/Utils/SimplifyLibCalls.cpp')
| -rw-r--r-- | llvm/lib/Transforms/Utils/SimplifyLibCalls.cpp | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/llvm/lib/Transforms/Utils/SimplifyLibCalls.cpp b/llvm/lib/Transforms/Utils/SimplifyLibCalls.cpp index 37cfc2cbbc1..22c078a8d2f 100644 --- a/llvm/lib/Transforms/Utils/SimplifyLibCalls.cpp +++ b/llvm/lib/Transforms/Utils/SimplifyLibCalls.cpp @@ -508,6 +508,9 @@ Value *LibCallSimplifier::optimizeStrLen(CallInst *CI, IRBuilder<> &B) { Value *LibCallSimplifier::optimizeWcslen(CallInst *CI, IRBuilder<> &B) { Module &M = *CI->getParent()->getParent()->getParent(); unsigned WCharSize = TLI->getWCharSize(M) * 8; + // We cannot perform this optimization without wchar_size metadata. + if (WCharSize == 0) + return nullptr; return optimizeStringLength(CI, B, WCharSize); } |
