Use a SmallPtrSet to dedup successors in EmitSjLjDispatchBlock.
The test case ARM/2011-05-04-MultipleLandingPadSuccs.ll was creating
duplicate successor list entries.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@162222 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/ARM/ARMISelLowering.cpp b/lib/Target/ARM/ARMISelLowering.cpp
index 3974d05..df4039b 100644
--- a/lib/Target/ARM/ARMISelLowering.cpp
+++ b/lib/Target/ARM/ARMISelLowering.cpp
@@ -6151,13 +6151,12 @@
}
// Add the jump table entries as successors to the MBB.
- MachineBasicBlock *PrevMBB = 0;
+ SmallPtrSet<MachineBasicBlock*, 8> SeenMBBs;
for (std::vector<MachineBasicBlock*>::iterator
I = LPadList.begin(), E = LPadList.end(); I != E; ++I) {
MachineBasicBlock *CurMBB = *I;
- if (PrevMBB != CurMBB)
+ if (SeenMBBs.insert(CurMBB))
DispContBB->addSuccessor(CurMBB);
- PrevMBB = CurMBB;
}
// N.B. the order the invoke BBs are processed in doesn't matter here.