[PATCH] D29153: [BranchFolding] Tail common all identical unreachable blocks

[Reid Kleckner via Phabricator via llvm-commits]

rnk added inline comments.


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Comment at: lib/CodeGen/BranchFolding.cpp:521
+static bool blockEndsInUnreachable(const MachineBasicBlock *MBB) {
+  return MBB->succ_empty() && !MBB->isReturnBlock();
+}
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iteratee wrote:
> Unforturnately there are platforms where this isn't sufficient. I believe ARM is one of them.
For all the ARM examples I constructed, isReturnBlock appeared to be accurate.


https://reviews.llvm.org/D29153