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Avoid creating MERGE_VALUES nodes for single values.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49676 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman 2008-04-14 18:43:25 +00:00
parent 235fc57ef2
commit b91c89dfb9
1 changed files with 2 additions and 1 deletions
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lib/CodeGen/SelectionDAG/SelectionDAG.cpp
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@ -1848,7 +1848,8 @@ SDOperand SelectionDAG::getNode(unsigned Opcode, MVT::ValueType VT,
unsigned OpOpcode = Operand.Val->getOpcode();
switch (Opcode) {
case ISD::TokenFactor:
return Operand; // Factor of one node? No factor.
case ISD::MERGE_VALUES:
return Operand; // Factor or merge of one node? No need.
case ISD::FP_ROUND: assert(0 && "Invalid method to make FP_ROUND node");
case ISD::FP_EXTEND:
assert(MVT::isFloatingPoint(VT) &&