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| author | Dan Gohman <gohman@apple.com> | 2008-03-31 20:32:52 +0000 |
|---|---|---|
| committer | Dan Gohman <gohman@apple.com> | 2008-03-31 20:32:52 +0000 |
| commit | b061c4bc44caf62a16adad6047cda60785c2d0a4 (patch) | |
| tree | d9b9092680f8b93eb8642454450be69d167722fe /lib | |
| parent | 56a7c88cc532e8a72a8c3c303559500cd24d438b (diff) | |
| download | external_llvm-b061c4bc44caf62a16adad6047cda60785c2d0a4.zip external_llvm-b061c4bc44caf62a16adad6047cda60785c2d0a4.tar.gz external_llvm-b061c4bc44caf62a16adad6047cda60785c2d0a4.tar.bz2 | |
Fix a DAGCombiner optimization to respect volatile qualification.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48994 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/CodeGen/SelectionDAG/DAGCombiner.cpp | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp index 9f44c6a..4eccb81 100644 --- a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp +++ b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp @@ -4387,7 +4387,8 @@ SDOperand DAGCombiner::visitLOAD(SDNode *N) { // value. // TODO: Handle store large -> read small portion. // TODO: Handle TRUNCSTORE/LOADEXT - if (LD->getExtensionType() == ISD::NON_EXTLOAD) { + if (LD->getExtensionType() == ISD::NON_EXTLOAD && + !LD->isVolatile()) { if (ISD::isNON_TRUNCStore(Chain.Val)) { StoreSDNode *PrevST = cast<StoreSDNode>(Chain); if (PrevST->getBasePtr() == Ptr && |