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| author | David Bolvansky <david.bolvansky@gmail.com> | 2019-09-17 10:12:48 +0000 |
|---|---|---|
| committer | David Bolvansky <david.bolvansky@gmail.com> | 2019-09-17 10:12:48 +0000 |
| commit | be2487a2ba43f3929c894e8cf8fe3ddb0b9c6a24 (patch) | |
| tree | 342efda7d6566f80cd109f3b6576a49da36d6d0a /llvm/lib/Transforms | |
| parent | 3a3dddd9d72edecc774efaee153e876fe74fed6c (diff) | |
| download | bcm5719-llvm-be2487a2ba43f3929c894e8cf8fe3ddb0b9c6a24.tar.gz bcm5719-llvm-be2487a2ba43f3929c894e8cf8fe3ddb0b9c6a24.zip | |
[InstCombine] Annotate strdup with deref_or_null
llvm-svn: 372098
Diffstat (limited to 'llvm/lib/Transforms')
| -rw-r--r-- | llvm/lib/Transforms/InstCombine/InstCombineCalls.cpp | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/llvm/lib/Transforms/InstCombine/InstCombineCalls.cpp b/llvm/lib/Transforms/InstCombine/InstCombineCalls.cpp index e96e45e802a..90438189f89 100644 --- a/llvm/lib/Transforms/InstCombine/InstCombineCalls.cpp +++ b/llvm/lib/Transforms/InstCombine/InstCombineCalls.cpp @@ -4208,6 +4208,12 @@ static void annotateAnyAllocSite(CallBase &Call, const TargetLibraryInfo *TLI) { Call.addAttribute(AttributeList::ReturnIndex, Attribute::getWithDereferenceableOrNullBytes( Call.getContext(), Size.getZExtValue())); + } else if (isStrdupLikeFn(&Call, TLI) && Call.getNumArgOperands() == 1) { + // TODO: handle strndup + if (uint64_t Len = GetStringLength(Call.getOperand(0))) + Call.addAttribute( + AttributeList::ReturnIndex, + Attribute::getWithDereferenceableOrNullBytes(Call.getContext(), Len)); } } |
