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| author | Chris Lattner <sabre@nondot.org> | 2010-12-19 05:57:25 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2010-12-19 05:57:25 +0000 |
| commit | 1dec0d27048725cf73f73ce4f0bb97ca78255f97 (patch) | |
| tree | 8978f22547105aaecdb35b23d9eaaa6f1cea8c04 /lib/Transforms/Scalar/LICM.cpp | |
| parent | 1c0af0ed251af3d2ef795903133513656e5c369d (diff) | |
| download | llvm-1dec0d27048725cf73f73ce4f0bb97ca78255f97.tar.gz llvm-1dec0d27048725cf73f73ce4f0bb97ca78255f97.tar.bz2 llvm-1dec0d27048725cf73f73ce4f0bb97ca78255f97.tar.xz | |
Enhance LICM to promote alias sets whose pointers themselves are stored,
which doesn't affect the memory address being promoted.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122172 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Transforms/Scalar/LICM.cpp')
| -rw-r--r-- | lib/Transforms/Scalar/LICM.cpp | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/lib/Transforms/Scalar/LICM.cpp b/lib/Transforms/Scalar/LICM.cpp index 46fffccb3a..6d5b24a01b 100644 --- a/lib/Transforms/Scalar/LICM.cpp +++ b/lib/Transforms/Scalar/LICM.cpp @@ -691,7 +691,10 @@ void LICM::PromoteAliasSet(AliasSet &AS) { if (isa<LoadInst>(Use)) assert(!cast<LoadInst>(Use)->isVolatile() && "AST broken"); else if (isa<StoreInst>(Use)) { - if (Use->getOperand(0) == ASIV) return; + // Stores *of* the pointer are not interesting, only stores *to* the + // pointer. + if (Use->getOperand(1) != ASIV) + continue; assert(!cast<StoreInst>(Use)->isVolatile() && "AST broken"); } else return; // Not a load or store. |