[PATCH] D116692: [SimplifyCFG] Tail-merging all blocks with `unreachable` terminator, final take

[Roman Lebedev via Phabricator via llvm-commits]

lebedev.ri added inline comments.


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Comment at: llvm/test/Transforms/PhaseOrdering/AArch64/peel-multiple-unreachable-exits-for-vectorization.ll:39
-; CHECK-NEXT:    br i1 [[MIN_ITERS_CHECK]], label [[LOOP_PREHEADER22:%.*]], label [[VECTOR_PH:%.*]]
-; CHECK:       vector.ph:
-; CHECK-NEXT:    [[N_MOD_VF:%.*]] = and i64 [[TMP1]], 3
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rnk wrote:
> It looks to me like tail merging unreachable blocks is preventing vectorization in this test case and the next, which seems like a blocking issue. The test was added here, if that helps understand why it no longer works:
> https://reviews.llvm.org/rG39cc0b8c68b8d316954ecfac0d1f8498ea42866c
> @fhahn 
Filed https://github.com/llvm/llvm-project/issues/53020


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https://reviews.llvm.org/D116692