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LegalizeSetCCOperands() may end up inserting libcalls. They need to be 

properly serialized. Do not clear LastCallSEQ_END until that is done.

llvm-svn: 32659
This commit is contained in:
Evan Cheng 2006-12-18 22:55:34 +00:00
parent 21be92d260
commit adc80f98cf
1 changed files with 2 additions and 3 deletions
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5
llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
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@ -1360,14 +1360,13 @@ SDOperand SelectionDAGLegalize::LegalizeOp(SDOperand Op) {
// Ensure that libcalls are emitted before a branch.
Tmp1 = DAG.getNode(ISD::TokenFactor, MVT::Other, Tmp1, LastCALLSEQ_END);
Tmp1 = LegalizeOp(Tmp1);
LastCALLSEQ_END = DAG.getEntryNode();
Tmp2 = Node->getOperand(2); // LHS
Tmp3 = Node->getOperand(3); // RHS
Tmp4 = Node->getOperand(1); // CC
LegalizeSetCCOperands(Tmp2, Tmp3, Tmp4);
LastCALLSEQ_END = DAG.getEntryNode();
// If we didn't get both a LHS and RHS back from LegalizeSetCCOperands,
// the LHS is a legal SETCC itself. In this case, we need to compare
// the result against zero to select between true and false values.