[llvm] [LoopVectorize] Don't scalarize predicated instruction with optsize (PR #129265)

[David Sherwood via llvm-commits]

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@@ -12,13 +12,13 @@ target datalayout = "E-m:e-p:32:32-i64:32-f64:32:64-a:0:32-n32-S128"
 define i32 @foo_optsize() #0 {
 ; CHECK-LABEL: @foo_optsize(
 ; CHECK-NEXT:  entry:
-; CHECK-NEXT:    br i1 false, label [[SCALAR_PH:%.*]], label [[VECTOR_PH:%.*]]
+; CHECK-NEXT:    br i1 false, label [[SCALAR_PH:%.*]], label [[ENTRY:%.*]]
 ; CHECK:       vector.ph:
-; CHECK-NEXT:    br label [[VECTOR_BODY:%.*]]
+; CHECK-NEXT:    br label [[FOR_BODY:%.*]]
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david-arm wrote:

I don't think this is your fault, but this looks weird. We are definitely jumping to vector.body so I don't know why it's created a FOR_BODY label?

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