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Implement Duncan's suggestion to use the result of getSetCCResultType if it is legal

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(this is always the case for scalars), otherwise use the promoted result type.

Fix test/CodeGen/X86/vsplit-and.ll when promote-elements is enabled.

llvm-svn: 140464
This commit is contained in:
Nadav Rotem 2011-09-24 19:48:19 +00:00
parent f1449d75ba
commit 347c658183
1 changed files with 9 additions and 4 deletions
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13
lib/CodeGen/SelectionDAG/LegalizeIntegerTypes.cpp
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@ -503,8 +503,15 @@ SDValue DAGTypeLegalizer::PromoteIntRes_SELECT_CC(SDNode *N) {
SDValue DAGTypeLegalizer::PromoteIntRes_SETCC(SDNode *N) {
EVT SVT = TLI.getSetCCResultType(N->getOperand(0).getValueType());
// Vector setcc result types need to be leglized.
SVT = TLI.getTypeToTransformTo(*DAG.getContext(), SVT);
// Convert to the expected type.
EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
// Only use the result of getSetCCResultType if it is legal,
// otherwise just use the promoted result type (NVT).
if (getTypeAction(SVT) != TargetLowering::TypeLegal) {
SVT = NVT;
}
DebugLoc dl = N->getDebugLoc();
assert(SVT.isVector() == N->getOperand(0).getValueType().isVector() &&
@ -514,8 +521,6 @@ SDValue DAGTypeLegalizer::PromoteIntRes_SETCC(SDNode *N) {
SDValue SetCC = DAG.getNode(N->getOpcode(), dl, SVT, N->getOperand(0),
N->getOperand(1), N->getOperand(2));
// Convert to the expected type.
EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
assert(NVT.bitsLE(SVT) && "Integer type overpromoted?");
return DAG.getNode(ISD::TRUNCATE, dl, NVT, SetCC);
}