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Implement split and scalarize for SELECT_CC, fixing PR2504

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52887 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2008-06-30 02:43:01 +00:00
parent 69c8d9be02
commit 80c1a5622a
2 changed files with 32 additions and 0 deletions
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23
lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
View File

@ -6895,6 +6895,22 @@ void SelectionDAGLegalize::SplitVectorOp(SDOperand Op, SDOperand &Lo,
} }
break; break;
} }
case ISD::SELECT_CC: {
SDOperand CondLHS = Node->getOperand(0);
SDOperand CondRHS = Node->getOperand(1);
SDOperand CondCode = Node->getOperand(4);
SDOperand LL, LH, RL, RH;
SplitVectorOp(Node->getOperand(2), LL, LH);
SplitVectorOp(Node->getOperand(3), RL, RH);
// Handle a simple select with vector operands.
Lo = DAG.getNode(ISD::SELECT_CC, NewVT_Lo, CondLHS, CondRHS,
LL, RL, CondCode);
Hi = DAG.getNode(ISD::SELECT_CC, NewVT_Hi, CondLHS, CondRHS,
LH, RH, CondCode);
break;
}
case ISD::VSETCC: { case ISD::VSETCC: {
SDOperand LL, LH, RL, RH; SDOperand LL, LH, RL, RH;
SplitVectorOp(Node->getOperand(0), LL, LH); SplitVectorOp(Node->getOperand(0), LL, LH);
@ -7122,6 +7138,13 @@ SDOperand SelectionDAGLegalize::ScalarizeVectorOp(SDOperand Op) {
ScalarizeVectorOp(Op.getOperand(1)), ScalarizeVectorOp(Op.getOperand(1)),
ScalarizeVectorOp(Op.getOperand(2))); ScalarizeVectorOp(Op.getOperand(2)));
break; break;
case ISD::SELECT_CC:
Result = DAG.getNode(ISD::SELECT_CC, NewVT, Node->getOperand(0),
Node->getOperand(1),
ScalarizeVectorOp(Op.getOperand(2)),
ScalarizeVectorOp(Op.getOperand(3)),
Node->getOperand(4));
break;
case ISD::VSETCC: { case ISD::VSETCC: {
SDOperand Op0 = ScalarizeVectorOp(Op.getOperand(0)); SDOperand Op0 = ScalarizeVectorOp(Op.getOperand(0));
SDOperand Op1 = ScalarizeVectorOp(Op.getOperand(1)); SDOperand Op1 = ScalarizeVectorOp(Op.getOperand(1));

9
test/CodeGen/Generic/select-cc.ll Normal file
View File

@ -0,0 +1,9 @@
; RUN: llvm-as < %s | llc
; PR2504
define <2 x double> @vector_select(<2 x double> %x, <2 x double> %y) nounwind {
%x.lo = extractelement <2 x double> %x, i32 0 ; <double> [#uses=1]
%x.lo.ge = fcmp oge double %x.lo, 0.000000e+00 ; <i1> [#uses=1]
%a.d = select i1 %x.lo.ge, <2 x double> %y, <2 x double> %x ; <<2 x double>> [#uses=1]
ret <2 x double> %a.d
}