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| author | Anton Korobeynikov <asl@math.spbu.ru> | 2010-05-01 12:52:34 +0000 |
|---|---|---|
| committer | Anton Korobeynikov <asl@math.spbu.ru> | 2010-05-01 12:52:34 +0000 |
| commit | c9c3d9938b7533786ed9a1736a86453d9241ce68 (patch) | |
| tree | d9bd4e8ef9bbdc729d1cf4c93f99daf2fbab3d57 /lib | |
| parent | 4b54cd2daac13905725cdf23c82fa2ec7252a2c4 (diff) | |
| download | external_llvm-c9c3d9938b7533786ed9a1736a86453d9241ce68.zip external_llvm-c9c3d9938b7533786ed9a1736a86453d9241ce68.tar.gz external_llvm-c9c3d9938b7533786ed9a1736a86453d9241ce68.tar.bz2 | |
Insert ANY_EXTEND node instead of invalid truncate during DAG Combining (X & 1),
when needed. This fixes PR7001
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102838 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/CodeGen/SelectionDAG/TargetLowering.cpp | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/lib/CodeGen/SelectionDAG/TargetLowering.cpp b/lib/CodeGen/SelectionDAG/TargetLowering.cpp index 33c8d1a..8a4a1b1 100644 --- a/lib/CodeGen/SelectionDAG/TargetLowering.cpp +++ b/lib/CodeGen/SelectionDAG/TargetLowering.cpp @@ -1882,10 +1882,15 @@ TargetLowering::SimplifySetCC(EVT VT, SDValue N0, SDValue N1, isa<ConstantSDNode>(Op0.getOperand(1)) && cast<ConstantSDNode>(Op0.getOperand(1))->getAPIntValue() == 1) { // If this is (X&1) == / != 1, normalize it to (X&1) != / == 0. - if (Op0.getValueType() != VT) + if (Op0.getValueType().bitsGT(VT)) Op0 = DAG.getNode(ISD::AND, dl, VT, DAG.getNode(ISD::TRUNCATE, dl, VT, Op0.getOperand(0)), DAG.getConstant(1, VT)); + else if (Op0.getValueType().bitsLT(VT)) + Op0 = DAG.getNode(ISD::AND, dl, VT, + DAG.getNode(ISD::ANY_EXTEND, dl, VT, Op0.getOperand(0)), + DAG.getConstant(1, VT)); + return DAG.getSetCC(dl, VT, Op0, DAG.getConstant(0, Op0.getValueType()), Cond == ISD::SETEQ ? ISD::SETNE : ISD::SETEQ); |