diff options
| 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 | 851bfff50f7251e4d00b5fffbb5e140544cc4a63 (patch) | |
| tree | 78a4a45dc19318395c574b94ce01e5c3ded9eccc | |
| parent | 61c24e96b1ee5245e0b382a35773d2bc41919880 (diff) | |
In addition to arguments passed to it, memcpy (and all other calls) can ModRef pointers that alias their arguments as well. This fixes PR2057.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47317 91177308-0d34-0410-b5e6-96231b3b80d8
| -rw-r--r-- | lib/Analysis/BasicAliasAnalysis.cpp | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/lib/Analysis/BasicAliasAnalysis.cpp b/lib/Analysis/BasicAliasAnalysis.cpp index 57d726df2d..200779f0e7 100644 --- a/lib/Analysis/BasicAliasAnalysis.cpp +++ b/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) |