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Back out indirect branch load folding hack. It broke some tests.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28425 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng 2006-05-21 06:28:50 +00:00
parent e8263e6437
commit 3c380e71e1
1 changed files with 0 additions and 63 deletions
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63
lib/Target/X86/X86ISelDAGToDAG.cpp
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@ -835,69 +835,6 @@ void X86DAGToDAGISel::Select(SDOperand &Result, SDOperand N) {
break;
}
case X86ISD::CALL:
case X86ISD::TAILCALL: {
// Handle indirect call which folds a load here. This never matches by
// the TableGen generated code since the load's chain result is read by
// the callseq_start node or by a TokenFactor which feeds into the
// callseq_start.
SDOperand N1 = Node->getOperand(1);
if (N1.getOpcode() == ISD::LOAD && N1.hasOneUse() &&
!CodeGenMap.count(N1.getValue(0))) {
SDOperand Chain = Node->getOperand(0);
SDNode *CallStart = FindCallStartFromCall(Chain.Val);
if (!CallStart) break;
SDNode *CSOp0 = CallStart->getOperand(0).Val;
if (! (CSOp0 == N1.Val ||
(CSOp0->getOpcode() == ISD::TokenFactor &&
N1.Val->isOperand(CSOp0))))
break;
SDOperand Base, Scale, Index, Disp;
if (SelectAddr(N1.getOperand(1), Base, Scale, Index, Disp)) {
Select(Base, Base);
Select(Scale, Scale);
Select(Index, Index);
Select(Disp, Disp);
Select(Chain, Chain);
bool HasOptInFlag = false;
SDOperand InFlag;
if (N.getNumOperands() == 3) {
Select(InFlag, N.getOperand(2));
HasOptInFlag = true;
}
SDNode *ResNode;
if (HasOptInFlag)
ResNode = CurDAG->getTargetNode(X86::CALL32m, MVT::Other, MVT::Flag,
Base, Scale, Index, Disp, Chain,
InFlag);
else
ResNode = CurDAG->getTargetNode(X86::CALL32m, MVT::Other, MVT::Flag,
Base, Scale, Index, Disp, Chain);
SelectionDAG::InsertISelMapEntry(CodeGenMap, N.Val, 0, Chain.Val,
Chain.ResNo);
SelectionDAG::InsertISelMapEntry(CodeGenMap, N.Val, 1, ResNode, 1);
// CALLSEQ_START needs a chain! It can't be ResNode, that would cause
// a cycle. It should be the chain of the load.
Select(Chain, N1.getOperand(0));
SelectionDAG::InsertISelMapEntry(CodeGenMap, N1.Val, 1, Chain.Val,
Chain.ResNo);
AddHandleReplacement(N1.Val, 1, Chain.Val, Chain.ResNo);
Result = SDOperand(ResNode, 0);
#ifndef NDEBUG
DEBUG(std::cerr << std::string(Indent-2, ' '));
DEBUG(std::cerr << "== ");
DEBUG(Result.Val->dump(CurDAG));
DEBUG(std::cerr << "\n");
Indent -= 2;
#endif
return;
}
}
break;
}
}
SelectCode(Result, N);