================
@@ -1624,6 +1632,15 @@ bool BranchFolder::OptimizeBlock(MachineBasicBlock *MBB)
{
} else {
DidChange = true;
PMBB->ReplaceUsesOfBlockWith(MBB, CurTBB);
+ // Add rest successors of MBB to successors of CurTBB. Those
+ // successors are not directly reachable via MBB, so it should be
+ // landing-pad.
+ for (auto SI = MBB->succ_begin(), SE = MBB->succ_end(); SI != SE;
+ ++SI)
+ if (*SI != CurTBB && !CurTBB->isSuccessor(*SI)) {
+ assert((*SI)->isEHPad() && "Bad CFG");
+ CurTBB->copySuccessor(MBB, SI);
----------------
phoebewang wrote:
I see we assert for `(*SI)->isEHPad()`, but `bb.6` is not a EHPad. Did I
misunderstand something here?
BTW, can we use `SI->isEHPad()` directly?
https://github.com/llvm/llvm-project/pull/77608
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