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| author | Dan Gohman <gohman@apple.com> | 2008-06-02 22:27:05 +0000 |
|---|---|---|
| committer | Dan Gohman <gohman@apple.com> | 2008-06-02 22:27:05 +0000 |
| commit | 33b625bee429986b2b3bd11108816d256df39334 (patch) | |
| tree | dbb00636abdd301a3c92edc91b557f4601e997c3 /lib | |
| parent | 83ccc0a50c7c52b2d774c3f4d209a120800ecdc7 (diff) | |
| download | external_llvm-33b625bee429986b2b3bd11108816d256df39334.zip external_llvm-33b625bee429986b2b3bd11108816d256df39334.tar.gz external_llvm-33b625bee429986b2b3bd11108816d256df39334.tar.bz2 | |
Fold adds and subtracts of zero immediately, instead of waiting
for dagcombine to do this.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51886 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/CodeGen/SelectionDAG/SelectionDAG.cpp | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/lib/CodeGen/SelectionDAG/SelectionDAG.cpp b/lib/CodeGen/SelectionDAG/SelectionDAG.cpp index c8f5d53..a9b7381 100644 --- a/lib/CodeGen/SelectionDAG/SelectionDAG.cpp +++ b/lib/CodeGen/SelectionDAG/SelectionDAG.cpp @@ -2115,10 +2115,12 @@ SDOperand SelectionDAG::getNode(unsigned Opcode, MVT::ValueType VT, break; case ISD::OR: case ISD::XOR: + case ISD::ADD: + case ISD::SUB: assert(MVT::isInteger(VT) && N1.getValueType() == N2.getValueType() && N1.getValueType() == VT && "Binary operator types must match!"); - // (X ^| 0) -> X. This commonly occurs when legalizing i64 values, so it's - // worth handling here. + // (X ^|+- 0) -> X. This commonly occurs when legalizing i64 values, so + // it's worth handling here. if (N2C && N2C->isNullValue()) return N1; break; @@ -2128,8 +2130,6 @@ SDOperand SelectionDAG::getNode(unsigned Opcode, MVT::ValueType VT, case ISD::MULHS: assert(MVT::isInteger(VT) && "This operator does not apply to FP types!"); // fall through - case ISD::ADD: - case ISD::SUB: case ISD::MUL: case ISD::SDIV: case ISD::SREM: |