diff options
| 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 | |
| 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')
| -rw-r--r-- | llvm/lib/Transforms/Utils/BuildLibCalls.cpp | 13 | ||||
| -rw-r--r-- | llvm/test/Transforms/InferFunctionAttrs/annotate.ll | 4 |
2 files changed, 13 insertions, 4 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); diff --git a/llvm/test/Transforms/InferFunctionAttrs/annotate.ll b/llvm/test/Transforms/InferFunctionAttrs/annotate.ll index f3b0cd43640..8054802ff02 100644 --- a/llvm/test/Transforms/InferFunctionAttrs/annotate.ll +++ b/llvm/test/Transforms/InferFunctionAttrs/annotate.ll @@ -619,7 +619,7 @@ declare i8* @malloc(i64) ; CHECK-LINUX: declare noalias i8* @memalign(i64, i64) [[G0]] declare i8* @memalign(i64, i64) -; CHECK: declare i8* @memccpy(i8*, i8* nocapture readonly, i32, i64) [[G1]] +; CHECK: declare i8* @memccpy(i8* noalias, i8* noalias nocapture readonly, i32, i64) [[G1]] declare i8* @memccpy(i8*, i8*, i32, i64) ; CHECK: declare i8* @memchr(i8*, i32, i64) [[G2]] @@ -631,7 +631,7 @@ declare i32 @memcmp(i8*, i8*, i64) ; CHECK: declare i8* @memcpy(i8* noalias returned, i8* noalias nocapture readonly, i64) [[G1]] declare i8* @memcpy(i8*, i8*, i64) -; CHECK: declare i8* @mempcpy(i8*, i8* nocapture readonly, i64) [[G1]] +; CHECK: declare i8* @mempcpy(i8* noalias, i8* noalias nocapture readonly, i64) [[G1]] declare i8* @mempcpy(i8*, i8*, i64) ; CHECK: declare i8* @memmove(i8* returned, i8* nocapture readonly, i64) [[G1]] |
