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| author | Chris Lattner <sabre@nondot.org> | 2004-12-29 04:36:02 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2004-12-29 04:36:02 +0000 |
| commit | da16d8c00bb52e37967dc7a18a4bd39f16f10650 (patch) | |
| tree | 1517e7ab14ec48ae2cf16d0ea86446855aeaca54 /lib/Transforms | |
| parent | d0137cd0f4a8621409a910ee988eb8870477796c (diff) | |
Fix PR491 and testcase Transforms/DeadStoreElimination/2004-12-28-PartialStore.ll
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19180 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Transforms')
| -rw-r--r-- | lib/Transforms/Scalar/DeadStoreElimination.cpp | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/lib/Transforms/Scalar/DeadStoreElimination.cpp b/lib/Transforms/Scalar/DeadStoreElimination.cpp index 27a0b0a881..e29bad53c1 100644 --- a/lib/Transforms/Scalar/DeadStoreElimination.cpp +++ b/lib/Transforms/Scalar/DeadStoreElimination.cpp @@ -111,7 +111,8 @@ bool DSE::runOnBasicBlock(BasicBlock &BB) { if (AliasSet *AS = KillLocs.getAliasSetForPointerIfExists(Ptr, ValSize)) for (AliasSet::iterator ASI = AS->begin(), E = AS->end(); ASI != E; ++ASI) - if (AA.alias(ASI.getPointer(), ASI.getSize(), Ptr, ValSize) + if (ASI.getSize() >= ValSize && // Overwriting all of this store. + AA.alias(ASI.getPointer(), ASI.getSize(), Ptr, ValSize) == AliasAnalysis::MustAlias) { // If we found a must alias in the killed set, then this store really // is dead. Remember that the various operands of the store now have |