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Use ADDC if it is valid at any smaller size. Do it right this time

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llvm-svn: 57248
This commit is contained in:
Andrew Lenharth 2008-10-07 17:09:16 +00:00
parent 84166420cc
commit 2399c6cb95
1 changed files with 6 additions and 3 deletions
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9
lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
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@ -6445,14 +6445,17 @@ void SelectionDAGLegalize::ExpandOp(SDValue Op, SDValue &Lo, SDValue &Hi){
unsigned OpV = Node->getOpcode() == ISD::ADD ? ISD::ADDC : ISD::SUBC;
bool hasCarry = false;
if (NVT == MVT::i64)
hasCarry |= TLI.isOperationLegal(OpV, MVT::i32)
hasCarry |= TLI.isOperationLegal(OpV, MVT::i64)
| TLI.isOperationLegal(OpV, MVT::i32)
| TLI.isOperationLegal(OpV, MVT::i16)
| TLI.isOperationLegal(OpV, MVT::i8);
if (NVT == MVT::i32)
hasCarry |= TLI.isOperationLegal(OpV, MVT::i16)
hasCarry |= TLI.isOperationLegal(OpV, MVT::i32)
| TLI.isOperationLegal(OpV, MVT::i16)
| TLI.isOperationLegal(OpV, MVT::i8);
if (NVT == MVT::i16)
hasCarry |= TLI.isOperationLegal(OpV, MVT::i8);
hasCarry |= TLI.isOperationLegal(OpV, MVT::i16)
| TLI.isOperationLegal(OpV, MVT::i8);
if(hasCarry) {
if (Node->getOpcode() == ISD::ADD) {