[clang] [llvm] [SROA] Canonicalize homogeneous structs to fixed vectors (opt-in, after memcpyopt) (PR #165159)

[Antonio Frighetto via cfe-commits]

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+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 6
+; RUN: opt -passes='sroa<aggregate-to-vector>,gvn,instcombine,simplifycfg' -S %s | FileCheck %s
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antoniofrighetto wrote:

Why are we also testing `gvn,instcombine,simplifycfg` here? Is this needed?

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