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| author | Eli Friedman <eli.friedman@gmail.com> | 2011-10-12 22:00:26 +0000 |
|---|---|---|
| committer | Eli Friedman <eli.friedman@gmail.com> | 2011-10-12 22:00:26 +0000 |
| commit | 18ead6b587159993b340ad4e2e2c5fed76e978c0 (patch) | |
| tree | f078c9cc7a3d84f8c782d45772b7c15cbe8a9585 | |
| parent | 81b2928d80047cb6c8ae0048185742abae1d9dfa (diff) | |
Fix a couple hash functions so that they do not depend on undefined shifts. Based on patch by Ahmed Charles.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@141820 91177308-0d34-0410-b5e6-96231b3b80d8
| -rw-r--r-- | lib/Transforms/Scalar/EarlyCSE.cpp | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/lib/Transforms/Scalar/EarlyCSE.cpp b/lib/Transforms/Scalar/EarlyCSE.cpp index 022af40c63..c0223d2bf1 100644 --- a/lib/Transforms/Scalar/EarlyCSE.cpp +++ b/lib/Transforms/Scalar/EarlyCSE.cpp @@ -92,7 +92,7 @@ unsigned DenseMapInfo<SimpleValue>::getHashValue(SimpleValue Val) { // Hash in all of the operands as pointers. unsigned Res = 0; for (unsigned i = 0, e = Inst->getNumOperands(); i != e; ++i) - Res ^= getHash(Inst->getOperand(i)) << i; + Res ^= getHash(Inst->getOperand(i)) << (i & 0xF); if (CastInst *CI = dyn_cast<CastInst>(Inst)) Res ^= getHash(CI->getType()); @@ -185,7 +185,7 @@ unsigned DenseMapInfo<CallValue>::getHashValue(CallValue Val) { for (unsigned i = 0, e = Inst->getNumOperands(); i != e; ++i) { assert(!Inst->getOperand(i)->getType()->isMetadataTy() && "Cannot value number calls with metadata operands"); - Res ^= getHash(Inst->getOperand(i)) << i; + Res ^= getHash(Inst->getOperand(i)) << (i & 0xF); } // Mix in the opcode. |