llvm-project Meso-Update

[StephanTLavavej]

• This updates our llvm-project submodule for the first time in 4 months. Previously:

  • 4263

  • 4348

• To make this possible, I had to fix the following things upstream:
  • llvm/llvm-project#93255
  • llvm/llvm-project#93257
  • llvm/llvm-project#93259
• Tons of things have been fixed upstream, allowing us to remove many expected failures and update comments:
  • llvm/llvm-project#77948
  • llvm/llvm-project#79978
  • llvm/llvm-project#79856
  • llvm/llvm-project#83734
  • llvm/llvm-project#74534
  • llvm/llvm-project#88669
  • llvm/llvm-project#90981
  • llvm/llvm-project#88998
  • llvm/llvm-project#74630
  • llvm/llvm-project#79793
• libcxx replaced old Features with 'has-1024-bit-atomics' (and unconditional Features should be defined in features.py instead of tests.py):
  • llvm/llvm-project#75553
  • llvm/llvm-project#83841
• We 'has-no-zdump' (a unix program).
• libcxx now uses 'c++23' instead of 'c++2b'. I believe this was:
  • https://github.com/llvm/llvm-project/commit/71400505ca04
  • llvm/llvm-project#69035
• Remove C++26 features from 'MISSING STL FEATURES'.
  • Now that we're identifying ourselves as being a C++23 implementation.
• Update magic comments.
  • These are used by the internal test harness to skip tests.
  • The two removed lines no longer appear in libcxx.
• range_adaptor_closure.pass.cpp needs WG21-P1169R4 static operator().
• Add missing newline.
• Mark vector.modifiers/destroy_elements.pass.cpp as failing due to constexpr step limits.
• Categorize failing tests.
• format.range.formatter/parse.pass.cpp is now passing after #4642.
• Recategorize format.range.formatter/format.pass.cpp.
• Skip ranges.ends_with.pass.cpp which sporadically fails with "fatal error C1060: compiler is out of heap space".
• Finally, we need to update tests/std/tests/P0088R3_variant/test.cpp because it uses LLVM machinery. Both VariantAllowsNarrowingConversions and variant<T&> coverage were removed:
  • llvm/llvm-project#83928
  • llvm/llvm-project#84222

I'm working on a full regeneration of P0088R3_variant, but that's going to be a much larger change and I don't want to mix that into this PR.

[cpplearner]

The P0088R3_variant test is failing because libc++ removed the definition of TEST_VARIANT_HAS_NO_REFERENCES (along with the guarded test code in the libc++ test suite). See LLVM-84222.

[StephanTLavavej]

Yeah, the <variant> tests have accumulated a bunch of changes. I'm performing a full manual regeneration.

Edit: The regen is going to be big, I'll go with a small change here.