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MachineBasicBlock::SplitCriticalEdge() should follow LLVM IR variant and refuse to break edge to EH landing pad. rdar://11300144

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@155470 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng
2012-04-24 19:06:55 +00:00
parent 1d9e68dab1
commit ddb1420e17
2 changed files with 76 additions and 0 deletions
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5
lib/CodeGen/MachineBasicBlock.cpp
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@ -596,6 +596,11 @@ bool MachineBasicBlock::canFallThrough() {
MachineBasicBlock *
MachineBasicBlock::SplitCriticalEdge(MachineBasicBlock *Succ, Pass *P) {
// Splitting the critical edge to a landing pad block is non-trivial. Don't do
// it in this generic function.
if (Succ->isLandingPad())
return NULL;
MachineFunction *MF = getParent();
DebugLoc dl; // FIXME: this is nowhere