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Chandler Carruth
59e0f95a10
The `--dump-cpp-ast` file tests strip references to Clang builtins so that the expected output is target-independent. The filter anchored a `__`-prefixed builtin identifier on a preceding space or quote, which matches the x86-64 `__va_list_tag` spelling but not the AArch64 `std::__va_list`, where `__` is preceded by the `::` namespace qualifier. That left a single `RecordType 'std::__va_list'` line unfiltered on AArch64, producing a spurious autoupdate diff for `thunk_ast.carbon`. Anchor the match on a preceding `:` as well so namespace-qualified builtins are also filtered. Carbon's test workflow covered Linux on x86-64 and macOS on AArch64, but had no Linux AArch64 coverage, so AArch64-specific issues that don't reproduce on macOS could land unnoticed. Add an `ubuntu-22.04-arm` runner to the matrix. The release used for Linux does not publish the monolithic `LLVM-*-Linux-ARM64` package, only a `clang+llvm-*-aarch64-linux-gnu` community build with a smaller tool set, so the Ubuntu setup now selects the tarball by `runner.arch`. The prune step uses `rm -f` since the two packages do not ship an identical set of tools to remove. Assisted-by: Claude Code with Claude Opus 4.7