[llvm] [Scalarizer] Ensure valid VectorSplits for each struct element in `visitExtractValueInst` (PR #128538)

[Deric Cheung via llvm-commits]

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@@ -1081,6 +1081,17 @@ define <4 x half> @call_v4f16(<4 x half> %a, <4 x half> %b) {
   ret <4 x half> %r
 }
 
+define <3 x i32> @call_v3i32(<3 x i32> %a, <3 x i32> %b) {
+; CHECK-LABEL: @call_v3i32(
+; CHECK-NEXT:    [[T:%.*]] = call { <3 x i32>, <3 x i1> } @llvm.uadd.with.overflow.v3i32(<3 x i32> [[A:%.*]], <3 x i32> [[B:%.*]])
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Icohedron wrote:

Adding frexp to the `min-bits.ll` test would require adding an extra run line:
```
; RUN: opt %s -passes='function(scalarizer<load-store;min-bits=64>,dce)' -S | FileCheck %s --check-prefixes=CHECK,MIN64
```


https://github.com/llvm/llvm-project/pull/128538