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Add the body of 'visitLandingPad'.

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This generates the SDNodes for the new exception handling scheme. It takes the
two values coming from the landingpad instruction and assigns them to the
EXCEPTIONADDR and EHSELECTION nodes.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137873 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Bill Wendling 2011-08-17 21:25:14 +00:00
parent ab82fd9ff6
commit 4eb2062143
1 changed files with 39 additions and 3 deletions
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42
lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
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@ -1814,6 +1814,45 @@ void SelectionDAGBuilder::visitResume(const ResumeInst &RI) {
llvm_unreachable("SelectionDAGBuilder shouldn't visit resume instructions!");
}
void SelectionDAGBuilder::visitLandingPad(const LandingPadInst &LP) {
assert(FuncInfo.MBB->isLandingPad() &&
"Call to landingpad not in landing pad!");
MachineBasicBlock *MBB = FuncInfo.MBB;
MachineModuleInfo &MMI = DAG.getMachineFunction().getMMI();
AddLandingPadInfo(LP, MMI, MBB);
SmallVector<EVT, 2> ValueVTs;
ComputeValueVTs(TLI, LP.getType(), ValueVTs);
// Insert the EXCEPTIONADDR instruction.
assert(FuncInfo.MBB->isLandingPad() &&
"Call to eh.exception not in landing pad!");
SDVTList VTs = DAG.getVTList(TLI.getPointerTy(), MVT::Other);
SDValue Ops[2];
Ops[0] = DAG.getRoot();
SDValue Op1 = DAG.getNode(ISD::EXCEPTIONADDR, getCurDebugLoc(), VTs, Ops, 1);
SDValue Chain = Op1.getValue(1);
// Insert the EHSELECTION instruction.
VTs = DAG.getVTList(TLI.getPointerTy(), MVT::Other);
Ops[0] = Op1;
Ops[1] = Chain;
SDValue Op2 = DAG.getNode(ISD::EHSELECTION, getCurDebugLoc(), VTs, Ops, 2);
Chain = Op2.getValue(1);
Op2 = DAG.getSExtOrTrunc(Op2, getCurDebugLoc(), MVT::i32);
Ops[0] = Op1;
Ops[1] = Op2;
SDValue Res = DAG.getNode(ISD::MERGE_VALUES, getCurDebugLoc(),
DAG.getVTList(&ValueVTs[0], ValueVTs.size()),
&Ops[0], 2);
std::pair<SDValue, SDValue> RetPair = std::make_pair(Res, Chain);
setValue(&LP, RetPair.first);
DAG.setRoot(RetPair.second);
}
/// handleSmallSwitchCaseRange - Emit a series of specific tests (suitable for
/// small case ranges).
bool SelectionDAGBuilder::handleSmallSwitchRange(CaseRec& CR,
@ -2985,9 +3024,6 @@ void SelectionDAGBuilder::visitExtractValue(const ExtractValueInst &I) {
&Values[0], NumValValues));
}
void SelectionDAGBuilder::visitLandingPad(const LandingPadInst &I) {
}
void SelectionDAGBuilder::visitGetElementPtr(const User &I) {
SDValue N = getValue(I.getOperand(0));
Type *Ty = I.getOperand(0)->getType();