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| author | David Bolvansky <david.bolvansky@gmail.com> | 2019-09-30 19:43:48 +0000 |
|---|---|---|
| committer | David Bolvansky <david.bolvansky@gmail.com> | 2019-09-30 19:43:48 +0000 |
| commit | a05e671c7e70e5e80565ad053b53e5da579f3712 (patch) | |
| tree | aa08876c4dacc326b88a8de218bf96306a37aa1b /llvm/lib/Transforms/Utils/BuildLibCalls.cpp | |
| parent | b0ccef143a5fd91849b85607efdf08c68037ccd0 (diff) | |
| download | bcm5719-llvm-a05e671c7e70e5e80565ad053b53e5da579f3712.tar.gz bcm5719-llvm-a05e671c7e70e5e80565ad053b53e5da579f3712.zip | |
[FunctionAttrs] Added noalias for memccpy/mempcpy arguments
llvm-svn: 373251
Diffstat (limited to 'llvm/lib/Transforms/Utils/BuildLibCalls.cpp')
| -rw-r--r-- | llvm/lib/Transforms/Utils/BuildLibCalls.cpp | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/llvm/lib/Transforms/Utils/BuildLibCalls.cpp b/llvm/lib/Transforms/Utils/BuildLibCalls.cpp index e8ce3f92749..71316ce8f75 100644 --- a/llvm/lib/Transforms/Utils/BuildLibCalls.cpp +++ b/llvm/lib/Transforms/Utils/BuildLibCalls.cpp @@ -306,12 +306,21 @@ bool llvm::inferLibFuncAttributes(Function &F, const TargetLibraryInfo &TLI) { case LibFunc_memcpy: Changed |= setDoesNotAlias(F, 0); Changed |= setDoesNotAlias(F, 1); - LLVM_FALLTHROUGH; + Changed |= setReturnedArg(F, 0); + Changed |= setDoesNotThrow(F); + Changed |= setDoesNotCapture(F, 1); + Changed |= setOnlyReadsMemory(F, 1); + return Changed; case LibFunc_memmove: Changed |= setReturnedArg(F, 0); - LLVM_FALLTHROUGH; + Changed |= setDoesNotThrow(F); + Changed |= setDoesNotCapture(F, 1); + Changed |= setOnlyReadsMemory(F, 1); + return Changed; case LibFunc_mempcpy: case LibFunc_memccpy: + Changed |= setDoesNotAlias(F, 0); + Changed |= setDoesNotAlias(F, 1); Changed |= setDoesNotThrow(F); Changed |= setDoesNotCapture(F, 1); Changed |= setOnlyReadsMemory(F, 1); |
