[all-commits] [llvm/llvm-project] a41708: [llvm-exegesis][unittests] Also disable Subprocess...

[Rainer Orth via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: a417083e27b155dc92b7f7271c0093aee0d7231c
      https://github.com/llvm/llvm-project/commit/a417083e27b155dc92b7f7271c0093aee0d7231c
  Author: Rainer Orth <ro at gcc.gnu.org>
  Date:   2024-08-10 (Sat, 10 Aug 2024)

  Changed paths:
    M llvm/unittests/tools/llvm-exegesis/X86/SubprocessMemoryTest.cpp

  Log Message:
  -----------
  [llvm-exegesis][unittests] Also disable SubprocessMemoryTest on SPARC (#102755)

Three `llvm-exegesis` tests
```
  LLVM-Unit :: tools/llvm-exegesis/./LLVMExegesisTests/SubprocessMemoryTest/DefinitionFillsCompletely
  LLVM-Unit :: tools/llvm-exegesis/./LLVMExegesisTests/SubprocessMemoryTest/MultipleDefinitions
  LLVM-Unit :: tools/llvm-exegesis/./LLVMExegesisTests/SubprocessMemoryTest/OneDefinition
```
`FAIL` on Linux/sparc64 like
```
llvm/unittests/tools/llvm-exegesis/X86/SubprocessMemoryTest.cpp:68: Failure
Expected equality of these values:
  SharedMemoryMapping[I]
    Which is: '\0'
  ExpectedValue[I]
    Which is: '\xAA' (170)
```
It seems like this test only works on little-endian hosts: three
sub-tests are already disabled on powerpc and s390x (both big-endian),
and the fourth is additionally guarded against big-endian hosts (making
the other guards unnecessary).

However, since it's not been analyzed if this is really an endianess
issue, this patch disables the whole test on powerpc and s390x as before
adding sparc to the mix.

Tested on `sparc64-unknown-linux-gnu` and `x86_64-pc-linux-gnu`.



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