[clang] [llvm] [SROA] Canonicalize homogeneous structs into fixed vectors (PR #165159)

[Jameson Nash via llvm-commits]

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+; RUN: opt -passes=sroa -S %s | FileCheck %s
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vtjnash wrote:

This should have an auto-generated check lines if possible, per
https://llvm.org/docs/TestingGuide.html#generating-assertions-in-regression-tests

Or a comment "NOTE: Do not autogenerate" with an explanation why it won't work

https://github.com/llvm/llvm-project/pull/165159