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| author | Chris Lattner <sabre@nondot.org> | 2005-04-26 01:18:33 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2005-04-26 01:18:33 +0000 |
| commit | cfa7ddd6e2e7f114f7f321cbb6423c3a05aec0f6 (patch) | |
| tree | 4fe3ad9eebbb488c11d6a16ee8a3804a245fd754 /llvm/lib/CodeGen | |
| parent | fe91dfec918850fa71c7813229ec780d7f147dca (diff) | |
| download | bcm5719-llvm-cfa7ddd6e2e7f114f7f321cbb6423c3a05aec0f6.tar.gz bcm5719-llvm-cfa7ddd6e2e7f114f7f321cbb6423c3a05aec0f6.zip | |
Fold (X > -1) | (Y > -1) --> (X&Y > -1)
llvm-svn: 21552
Diffstat (limited to 'llvm/lib/CodeGen')
| -rw-r--r-- | llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp b/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp index 3e5395bd341..e56ffec44f6 100644 --- a/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp +++ b/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp @@ -1075,8 +1075,10 @@ SDOperand SelectionDAG::getNode(unsigned Opcode, MVT::ValueType VT, if (cast<ConstantSDNode>(LR)->isAllOnesValue()) { // (X == -1) & (Y == -1) -> (X&Y == -1) // (X != -1) | (Y != -1) -> (X&Y != -1) + // (X > -1) | (Y > -1) -> (X&Y > -1) if ((Opcode == ISD::AND && Op2 == ISD::SETEQ) || - (Opcode == ISD::OR && Op2 == ISD::SETNE)) + (Opcode == ISD::OR && Op2 == ISD::SETNE) || + (Opcode == ISD::OR && Op2 == ISD::SETGT)) return getSetCC(Op2, VT, getNode(ISD::AND, LR.getValueType(), LL, RL), LR); // (X > -1) & (Y > -1) -> (X|Y > -1) |
