[llvm] [LV] Add initial support for vectorizing literal struct return values (PR #109833)

[Florian Hahn via llvm-commits]

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@@ -0,0 +1,122 @@
+; REQUIRES: asserts
+; RUN: opt < %s -passes=loop-vectorize,dce,instcombine -force-vector-width=2 -force-vector-interleave=1 -debug-only=loop-vectorize -disable-output -S 2>&1 | FileCheck %s
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fhahn wrote:

```suggestion
; RUN: opt < %s -passes=loop-vectorize -force-vector-width=2 -force-vector-interleave=1 -debug-only=loop-vectorize -disable-output -S 2>&1 | FileCheck %s
```

`dce,instcombine` shouldn't be needed when just checking the VPlan

https://github.com/llvm/llvm-project/pull/109833