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Fix a crash compiling Olden/tsp

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23630 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2005-10-05 04:45:43 +00:00
parent 0cb09f1a7a
commit 91559026d3
1 changed files with 4 additions and 6 deletions
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10
lib/CodeGen/SelectionDAG/DAGCombiner.cpp
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@ -1069,18 +1069,16 @@ SDOperand DAGCombiner::visitSELECT_CC(SDNode *N) {
// Determine if the condition we're dealing with is constant
SDOperand SCC = SimplifySetCC(TLI.getSetCCResultTy(), N0, N1, CC);
ConstantSDNode *SCCC = dyn_cast<ConstantSDNode>(SCC);
bool constTrue = SCCC && SCCC->getValue() == 1;
bool constFalse = SCCC && SCCC->isNullValue();
ConstantSDNode *SCCC = dyn_cast_or_null<ConstantSDNode>(SCC.Val);
// fold select_cc lhs, rhs, x, x, cc -> x
if (N2 == N3)
return N2;
// fold select_cc true, x, y -> x
if (constTrue)
if (SCCC && SCCC->getValue())
return N2;
// fold select_cc false, x, y -> y
if (constFalse)
if (SCCC && SCCC->getValue() == 0)
return N3;
// fold select_cc into other things, such as min/max/abs
return SimplifySelectCC(N0, N1, N2, N3, CC);