Function is_codegen_option

src/command/argument_parser.cpp:212–265

    return dir;
}

bool is_codegen_option(unsigned id) {
    /// Debug info options form a group (-g, -gdwarf-*, -gsplit-dwarf, etc.).
    if(auto opt = option::table().option(id); opt && opt->matches(OPT_DebugInfo_Group)) {
        return true;
    }

    switch(id) {
        /// Position-independent code — pure codegen, no macro or semantic effect.
        case OPT_fPIC:
        case OPT_fno_PIC:
        case OPT_fpic:
        case OPT_fno_pic:
        case OPT_fPIE:
        case OPT_fno_PIE:
        case OPT_fpie:
        case OPT_fno_pie:

        /// Frame pointer and unwind tables — pure codegen.
        case OPT_mframe_pointer_EQ:
        case OPT_fomit_frame_pointer:
        case OPT_fno_omit_frame_pointer:
        case OPT_funwind_tables:
        case OPT_fno_unwind_tables:
        case OPT_fasynchronous_unwind_tables:
        case OPT_fno_asynchronous_unwind_tables:

        /// Stack protection — pure codegen.
        case OPT_fstack_protector:
        case OPT_fstack_protector_strong:
        case OPT_fstack_protector_all:
        case OPT_fno_stack_protector:

        /// Section splitting, LTO, semantic interposition — pure codegen/linker.
        case OPT_fdata_sections:
        case OPT_fno_data_sections:
        case OPT_ffunction_sections:
        case OPT_fno_function_sections:
        case OPT_flto:
        case OPT_flto_EQ:
        case OPT_fno_lto:
        case OPT_fsemantic_interposition:
        case OPT_fno_semantic_interposition:
        case OPT_fvisibility_inlines_hidden:

        /// Diagnostics output formatting — doesn't affect analysis.
        case OPT_fcolor_diagnostics:
        case OPT_fno_color_diagnostics:

        /// Floating-point codegen — doesn't define macros (unlike -ffast-math).
        case OPT_ftrapping_math:
        case OPT_fno_trapping_math: return true;

        default: return false;
    }
}