[llvm] [LoopVectorize] Don't replicate blocks with optsize (PR #129265)

[John Brawn via llvm-commits]

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@@ -1035,58 +1035,59 @@ exit:
 
 ; Test case with a dead GEP between the load and store regions. Dead recipes
 ; need to be removed before merging.
-define void @merge_with_dead_gep_between_regions(i32 %n, ptr noalias %src, ptr noalias %dst) optsize {
+define void @merge_with_dead_gep_between_regions(i32 %n, ptr noalias %src, ptr noalias %dst) {
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john-brawn-arm wrote:

It looks like putting the contents of the loop in a if-block works (I dumped the vplan at the start and end of mergeReplicateRegionsIntoSuccessors and initially there's two replicate regions that then get merged into one).

https://github.com/llvm/llvm-project/pull/129265