[all-commits] [llvm/llvm-project] c1eacc: [Matrix] Fix test on SystemZ

[Visoiu Mistrih Francis via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: c1eacc3c409458cbd2de85c21af2df8562d73bef
      https://github.com/llvm/llvm-project/commit/c1eacc3c409458cbd2de85c21af2df8562d73bef
  Author: Francis Visoiu Mistrih <francisvm at apple.com>
  Date:   2023-09-05 (Tue, 05 Sep 2023)

  Changed paths:
    M clang/test/CodeGen/ffp-model.c

  Log Message:
  -----------
  [Matrix] Fix test on SystemZ

As reported by @uweigand in https://reviews.llvm.org/D158883:

```
The newly added test cases in ffp-model.c fail on SystemZ, making CI red:
https://lab.llvm.org/buildbot/#/builders/94/builds/16280

The root cause seems to be that by default, the SystemZ back-end targets
a machine without SIMD support, and therefore vector return types are
passed via implicit reference according to the ABI
```

this uses manual stores instead of vector returns.