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Remove propagateEHRegister in favour of a more limited

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fix, that is adequate while PR1508 remains unresolved.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37938 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Duncan Sands 2007-07-06 09:18:59 +00:00
parent b4fd45e2fc
commit 902919541f
1 changed files with 8 additions and 24 deletions
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32
lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
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@ -2548,25 +2548,6 @@ static void addCatchInfo(CallInst &I, MachineModuleInfo *MMI,
}
}
/// propagateEHRegister - The specified EH register is required in a successor
/// of the EH landing pad. Propagate it (by adding it to livein) to all the
/// blocks in the paths between the landing pad and the specified block.
static void propagateEHRegister(MachineBasicBlock *MBB, unsigned EHReg,
SmallPtrSet<MachineBasicBlock*, 8> Visited) {
if (MBB->isLandingPad() || !Visited.insert(MBB))
return;
MBB->addLiveIn(EHReg);
for (MachineBasicBlock::pred_iterator PI = MBB->pred_begin(),
E = MBB->pred_end(); PI != E; ++PI)
propagateEHRegister(*PI, EHReg, Visited);
}
static void propagateEHRegister(MachineBasicBlock *MBB, unsigned EHReg) {
SmallPtrSet<MachineBasicBlock*, 8> Visited;
propagateEHRegister(MBB, EHReg, Visited);
}
/// visitIntrinsicCall - Lower the call to the specified intrinsic function. If
/// we want to emit this as a call to a named external function, return the name
/// otherwise lower it and return null.
@ -2677,9 +2658,11 @@ SelectionDAGLowering::visitIntrinsicCall(CallInst &I, unsigned Intrinsic) {
case Intrinsic::eh_exception: {
if (ExceptionHandling) {
if (!CurMBB->isLandingPad() && TLI.getExceptionAddressRegister())
propagateEHRegister(CurMBB, TLI.getExceptionAddressRegister());
if (!CurMBB->isLandingPad()) {
// FIXME: Mark exception register as live in. Hack for PR1508.
unsigned Reg = TLI.getExceptionAddressRegister();
if (Reg) CurMBB->addLiveIn(Reg);
}
// Insert the EXCEPTIONADDR instruction.
SDVTList VTs = DAG.getVTList(TLI.getPointerTy(), MVT::Other);
SDOperand Ops[1];
@ -2703,8 +2686,9 @@ SelectionDAGLowering::visitIntrinsicCall(CallInst &I, unsigned Intrinsic) {
#ifndef NDEBUG
FuncInfo.CatchInfoLost.insert(&I);
#endif
if (TLI.getExceptionSelectorRegister())
propagateEHRegister(CurMBB, TLI.getExceptionSelectorRegister());
// FIXME: Mark exception selector register as live in. Hack for PR1508.
unsigned Reg = TLI.getExceptionSelectorRegister();
if (Reg) CurMBB->addLiveIn(Reg);
}
// Insert the EHSELECTION instruction.