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| author | Owen Anderson <resistor@mac.com> | 2008-02-19 06:47:18 +0000 |
|---|---|---|
| committer | Owen Anderson <resistor@mac.com> | 2008-02-19 06:47:18 +0000 |
| commit | d2d7c6b30967a8ffc949d1c8c238f2fa6a851bb4 (patch) | |
| tree | 1a26e73e80764d1ef176ccb559ece68450947570 /llvm/lib/Analysis | |
| parent | d2a02fe840553c6d4b5826b595a83d6ab4363b6d (diff) | |
| download | bcm5719-llvm-d2d7c6b30967a8ffc949d1c8c238f2fa6a851bb4.tar.gz bcm5719-llvm-d2d7c6b30967a8ffc949d1c8c238f2fa6a851bb4.zip | |
In addition to arguments passed to it, memcpy (and all other calls) can ModRef pointers that alias their arguments as well. This fixes PR2057.
llvm-svn: 47317
Diffstat (limited to 'llvm/lib/Analysis')
| -rw-r--r-- | llvm/lib/Analysis/BasicAliasAnalysis.cpp | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/llvm/lib/Analysis/BasicAliasAnalysis.cpp b/llvm/lib/Analysis/BasicAliasAnalysis.cpp index 57d726df2db..200779f0e7a 100644 --- a/llvm/lib/Analysis/BasicAliasAnalysis.cpp +++ b/llvm/lib/Analysis/BasicAliasAnalysis.cpp @@ -263,7 +263,8 @@ BasicAliasAnalysis::getModRefInfo(CallSite CS, Value *P, unsigned Size) { for (CallSite::arg_iterator CI = CS.arg_begin(), CE = CS.arg_end(); CI != CE; ++CI) if (isa<PointerType>((*CI)->getType()) && - getUnderlyingObject(*CI) == P) + ( getUnderlyingObject(*CI) == P || + alias(cast<Value>(CI), ~0ULL, P, ~0ULL) != NoAlias) ) passedAsArg = true; if (!passedAsArg) |
