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| author | Benjamin Kramer <benny.kra@googlemail.com> | 2013-05-16 18:47:58 +0000 |
|---|---|---|
| committer | Benjamin Kramer <benny.kra@googlemail.com> | 2013-05-16 18:47:58 +0000 |
| commit | 8401ed21aa7c8ca022aad4b83fc9c63c0b824720 (patch) | |
| tree | 9dc9ec90781d9b0616299366f8040ddfa9181272 /lib | |
| parent | afcca55ff9475cdb97ec576847fc676e95397fb4 (diff) | |
| download | llvm-8401ed21aa7c8ca022aad4b83fc9c63c0b824720.tar.gz llvm-8401ed21aa7c8ca022aad4b83fc9c63c0b824720.tar.bz2 llvm-8401ed21aa7c8ca022aad4b83fc9c63c0b824720.tar.xz | |
DAGCombine: Also shrink eq compares where the constant is exactly as large as the smaller type.
if ((x & 255) == 255)
before: movzbl %al, %eax
cmpl $255, %eax
after: cmpb $-1, %al
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@182038 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/CodeGen/SelectionDAG/TargetLowering.cpp | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/CodeGen/SelectionDAG/TargetLowering.cpp b/lib/CodeGen/SelectionDAG/TargetLowering.cpp index f5fc66c4d3..95c327c8b0 100644 --- a/lib/CodeGen/SelectionDAG/TargetLowering.cpp +++ b/lib/CodeGen/SelectionDAG/TargetLowering.cpp @@ -1160,7 +1160,7 @@ TargetLowering::SimplifySetCC(EVT VT, SDValue N0, SDValue N1, } // Make sure we're not losing bits from the constant. - if (MinBits < C1.getBitWidth() && MinBits > C1.getActiveBits()) { + if (MinBits < C1.getBitWidth() && MinBits >= C1.getActiveBits()) { EVT MinVT = EVT::getIntegerVT(*DAG.getContext(), MinBits); if (isTypeDesirableForOp(ISD::SETCC, MinVT)) { // Will get folded away. |