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Add ordering of SDNodes to LowerCallTo.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@91866 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Bill Wendling 2009-12-22 00:50:32 +00:00
parent ffc0574a12
commit e80ae836f2
1 changed files with 44 additions and 19 deletions
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63
lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
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@ -4860,8 +4860,7 @@ void SelectionDAGBuilder::LowerCallTo(CallSite CS, SDValue Callee,
SmallVector<ISD::ArgFlagsTy, 4> OutsFlags;
SmallVector<uint64_t, 4> Offsets;
getReturnInfo(RetTy, CS.getAttributes().getRetAttributes(),
OutVTs, OutsFlags, TLI, &Offsets);
OutVTs, OutsFlags, TLI, &Offsets);
bool CanLowerReturn = TLI.CanLowerReturn(CS.getCallingConv(),
FTy->isVarArg(), OutVTs, OutsFlags, DAG);
@ -4915,8 +4914,11 @@ void SelectionDAGBuilder::LowerCallTo(CallSite CS, SDValue Callee,
// Both PendingLoads and PendingExports must be flushed here;
// this call might not return.
(void)getRoot();
DAG.setRoot(DAG.getLabel(ISD::EH_LABEL, getCurDebugLoc(),
getControlRoot(), BeginLabel));
SDValue Label = DAG.getLabel(ISD::EH_LABEL, getCurDebugLoc(),
getControlRoot(), BeginLabel);
DAG.setRoot(Label);
if (DisableScheduling)
DAG.AssignOrdering(Label.getNode(), SDNodeOrder);
}
// Check if target-independent constraints permit a tail call here.
@ -4940,9 +4942,11 @@ void SelectionDAGBuilder::LowerCallTo(CallSite CS, SDValue Callee,
"Non-null chain expected with non-tail call!");
assert((Result.second.getNode() || !Result.first.getNode()) &&
"Null value expected with tail call!");
if (Result.first.getNode())
if (Result.first.getNode()) {
setValue(CS.getInstruction(), Result.first);
else if (!CanLowerReturn && Result.second.getNode()) {
if (DisableScheduling)
DAG.AssignOrdering(Result.first.getNode(), SDNodeOrder);
} else if (!CanLowerReturn && Result.second.getNode()) {
// The instruction result is the result of loading from the
// hidden sret parameter.
SmallVector<EVT, 1> PVTs;
@ -4956,41 +4960,62 @@ void SelectionDAGBuilder::LowerCallTo(CallSite CS, SDValue Callee,
SmallVector<SDValue, 4> Chains(NumValues);
for (unsigned i = 0; i < NumValues; ++i) {
SDValue Add = DAG.getNode(ISD::ADD, getCurDebugLoc(), PtrVT,
DemoteStackSlot,
DAG.getConstant(Offsets[i], PtrVT));
SDValue L = DAG.getLoad(OutVTs[i], getCurDebugLoc(), Result.second,
DAG.getNode(ISD::ADD, getCurDebugLoc(), PtrVT, DemoteStackSlot,
DAG.getConstant(Offsets[i], PtrVT)),
NULL, Offsets[i], false, 1);
Add, NULL, Offsets[i], false, 1);
Values[i] = L;
Chains[i] = L.getValue(1);
if (DisableScheduling) {
DAG.AssignOrdering(Add.getNode(), SDNodeOrder);
DAG.AssignOrdering(L.getNode(), SDNodeOrder);
}
}
SDValue Chain = DAG.getNode(ISD::TokenFactor, getCurDebugLoc(),
MVT::Other, &Chains[0], NumValues);
PendingLoads.push_back(Chain);
setValue(CS.getInstruction(), DAG.getNode(ISD::MERGE_VALUES,
getCurDebugLoc(), DAG.getVTList(&OutVTs[0], NumValues),
&Values[0], NumValues));
SDValue MV = DAG.getNode(ISD::MERGE_VALUES,
getCurDebugLoc(),
DAG.getVTList(&OutVTs[0], NumValues),
&Values[0], NumValues);
setValue(CS.getInstruction(), MV);
if (DisableScheduling) {
DAG.AssignOrdering(Chain.getNode(), SDNodeOrder);
DAG.AssignOrdering(MV.getNode(), SDNodeOrder);
}
}
// As a special case, a null chain means that a tail call has
// been emitted and the DAG root is already updated.
if (Result.second.getNode())
// As a special case, a null chain means that a tail call has been emitted and
// the DAG root is already updated.
if (Result.second.getNode()) {
DAG.setRoot(Result.second);
else
if (DisableScheduling)
DAG.AssignOrdering(Result.second.getNode(), SDNodeOrder);
} else {
HasTailCall = true;
}
if (LandingPad && MMI) {
// Insert a label at the end of the invoke call to mark the try range. This
// can be used to detect deletion of the invoke via the MachineModuleInfo.
EndLabel = MMI->NextLabelID();
DAG.setRoot(DAG.getLabel(ISD::EH_LABEL, getCurDebugLoc(),
getRoot(), EndLabel));
SDValue Label = DAG.getLabel(ISD::EH_LABEL, getCurDebugLoc(),
getRoot(), EndLabel);
DAG.setRoot(Label);
if (DisableScheduling)
DAG.AssignOrdering(Label.getNode(), SDNodeOrder);
// Inform MachineModuleInfo of range.
MMI->addInvoke(LandingPad, BeginLabel, EndLabel);
}
}
void SelectionDAGBuilder::visitCall(CallInst &I) {
const char *RenameFn = 0;
if (Function *F = I.getCalledFunction()) {