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Fold trivial two-operand tokenfactors where the operands are equal

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immediately.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56921 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman 2008-10-01 15:11:19 +00:00
parent 10b49489bf
commit 38ac062c2f
1 changed files with 1 additions and 0 deletions
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lib/CodeGen/SelectionDAG/SelectionDAG.cpp
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@ -2320,6 +2320,7 @@ SDValue SelectionDAG::getNode(unsigned Opcode, MVT VT,
// Fold trivial token factors.
if (N1.getOpcode() == ISD::EntryToken) return N2;
if (N2.getOpcode() == ISD::EntryToken) return N1;
if (N1 == N2) return N1;
break;
case ISD::CONCAT_VECTORS:
// A CONCAT_VECTOR with all operands BUILD_VECTOR can be simplified to