Cc

[jgarzik]

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[Copilot]

Pull request overview

This PR adds support for goto statements, enhances preprocessor macro support, and improves CLI compatibility with standard C compilers.

• Implements goto statement handling in the linearizer with proper basic block termination and dead code handling
• Adds comprehensive predefined macros for stdint.h, stddef.h, and inttypes.h compatibility (type definitions, limits, format specifiers)
• Enables _has* feature detection macros in preprocessor conditional expressions
• Replaces non-standard --dump-asm flag with standard -S -o - for assembly output

Reviewed changes

Copilot reviewed 11 out of 11 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
cc/token/preprocess.rs	Adds architecture-specific macro definitions during preprocessor initialization and implements __has_attribute/__has_builtin/__has_feature/__has_extension support in preprocessor conditional expressions
cc/tests/pcc/mod.rs	Adds three comprehensive tests for goto statement functionality (forward jump, backward jump/loop, and multiple labels)
cc/tests/features/debug.rs	Updates test commands from --dump-asm to -S -o - to align with standard compiler CLI conventions
cc/main.rs	Removes deprecated --dump-asm flag and implements -S -o - for assembly output to stdout
cc/linearize.rs	Implements proper goto statement handling by setting current_bb to None after branch emission to mark subsequent code as unreachable
cc/arch/x86_64/codegen.rs	Simplifies block label emission to always use block ID labels for consistency with IR jumps, removing special handling for C source labels
cc/arch/aarch64/codegen.rs	Applies the same block label simplification as x86_64 for consistency
cc/arch/mod.rs	Adds six new helper functions providing comprehensive predefined macros for stdint.h, stddef.h, and inttypes.h compatibility
cc/arch/lir.rs	Removes unused Directive::Raw variant that was previously used for custom label formatting
cc/TODO.md	Adds detailed implementation guides for future C11 features (complex numbers, alignment, thread-local storage)
cc/README.md	Updates documentation to reflect goto support and standardized CLI flags

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