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Delete unnecessarily cautious LastCALLSEQ code. 

llvm-svn: 136156
This commit is contained in:
Dan Gohman 2011-07-26 22:00:59 +00:00
parent e3be9795c8
commit 9eb62cd159
1 changed files with 1 additions and 14 deletions
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15
llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
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@ -912,12 +912,7 @@ SDValue SelectionDAGLegalize::LegalizeOp(SDValue Op) {
case ISD::BR_JT:
case ISD::BR_CC:
case ISD::BRCOND:
assert(LastCALLSEQ.size() == 1 && "branch inside CALLSEQ_BEGIN/END?");
// Branches tweak the chain to include LastCALLSEQ
Ops[0] = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, Ops[0],
getLastCALLSEQ());
Ops[0] = LegalizeOp(Ops[0]);
setLastCALLSEQ(DAG.getEntryNode());
break;
case ISD::SHL:
case ISD::SRL:
@ -1021,14 +1016,6 @@ SDValue SelectionDAGLegalize::LegalizeOp(SDValue Op) {
// libcalls), create the new CALLSEQ_START node.
Tmp1 = LegalizeOp(Node->getOperand(0)); // Legalize the chain.
// Merge in the last call to ensure that this call starts after the last
// call ended.
if (getLastCALLSEQ().getOpcode() != ISD::EntryToken) {
Tmp1 = DAG.getNode(ISD::TokenFactor, dl, MVT::Other,
Tmp1, getLastCALLSEQ());
Tmp1 = LegalizeOp(Tmp1);
}
// Do not try to legalize the target-specific arguments (#1+).
if (Tmp1 != Node->getOperand(0)) {
SmallVector<SDValue, 8> Ops(Node->op_begin(), Node->op_end());
@ -1050,7 +1037,7 @@ SDValue SelectionDAGLegalize::LegalizeOp(SDValue Op) {
setLastCALLSEQ(SDValue(CallEnd, 0));
// Legalize the call, starting from the CALLSEQ_END.
LegalizeOp(getLastCALLSEQ());
LegalizeOp(SDValue(CallEnd, 0));
return Result;
}
case ISD::CALLSEQ_END: