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| author | Nate Begeman <natebegeman@mac.com> | 2006-02-17 07:26:20 +0000 |
|---|---|---|
| committer | Nate Begeman <natebegeman@mac.com> | 2006-02-17 07:26:20 +0000 |
| commit | cd6a6ed0a9d4b63535b430bf4c5c4396cd9d4e86 (patch) | |
| tree | d2f10ccb83147eb308b972ed8f4ffa3e1a2446b2 | |
| parent | c2fe97e726407566871341337c3a11fa08491ab6 (diff) | |
| download | external_llvm-cd6a6ed0a9d4b63535b430bf4c5c4396cd9d4e86.zip external_llvm-cd6a6ed0a9d4b63535b430bf4c5c4396cd9d4e86.tar.gz external_llvm-cd6a6ed0a9d4b63535b430bf4c5c4396cd9d4e86.tar.bz2 | |
Don't expand sdiv by power of two before legalize, since it will likely
generate illegal nodes.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26261 91177308-0d34-0410-b5e6-96231b3b80d8
| -rw-r--r-- | lib/CodeGen/SelectionDAG/DAGCombiner.cpp | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp index 48bb202..4d5dcd7 100644 --- a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp +++ b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp @@ -731,8 +731,8 @@ SDOperand DAGCombiner::visitSDIV(SDNode *N) { if (TLI.MaskedValueIsZero(N1, SignBit) && TLI.MaskedValueIsZero(N0, SignBit)) return DAG.getNode(ISD::UDIV, N1.getValueType(), N0, N1); - // fold (sdiv X, pow2) -> simple ops. - if (N1C && N1C->getValue() && !TLI.isIntDivCheap() && + // fold (sdiv X, pow2) -> simple ops after legalize + if (N1C && N1C->getValue() && !TLI.isIntDivCheap() && AfterLegalize && (isPowerOf2_64(N1C->getSignExtended()) || isPowerOf2_64(-N1C->getSignExtended()))) { // If dividing by powers of two is cheap, then don't perform the following |