[all-commits] [llvm/llvm-project] ca4df6: [msan][test] Add tests for target("aarch64.svcount...

[Thurston Dang via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: ca4df68aaa8243f202a643f4f172fe2f5bceaf71
      https://github.com/llvm/llvm-project/commit/ca4df68aaa8243f202a643f4f172fe2f5bceaf71
  Author: Thurston Dang <thurston at google.com>
  Date:   2025-10-20 (Mon, 20 Oct 2025)

  Changed paths:
    A llvm/test/Instrumentation/MemorySanitizer/AArch64/sme-aarch64-svcount-mini.ll
    A llvm/test/Instrumentation/MemorySanitizer/AArch64/sme-aarch64-svcount.ll

  Log Message:
  -----------
  [msan][test] Add tests for target("aarch64.svcount") (#164315)

target("aarch64.svcount") is not properly supported by MSan, and will
lead to a crash:
```
fatal error: error in backend: Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
```

This commit adds two test cases: a full test case for tracking any
future improvements to the instrumentation (and also showing the crash),
and a manually reduced test case to show the crash.

Forked from llvm/test/CodeGen/AArch64/sme-aarch64-svcount.ll



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