Function generate_tier1

Tools/cases_generator/tier1_generator.py:149–196

(
    filenames: list[str], analysis: Analysis, outfile: TextIO, lines: bool
)

"""

def generate_tier1(
    filenames: list[str], analysis: Analysis, outfile: TextIO, lines: bool
) -> None:
    write_header(__file__, filenames, outfile)
    outfile.write("""
#ifdef TIER_TWO
    #error "This file is for Tier 1 only"
#endif
#define TIER_ONE 1
""")
    outfile.write(f"""
#if !_Py_TAIL_CALL_INTERP
#if !USE_COMPUTED_GOTOS
    dispatch_opcode:
        switch (dispatch_code)
#endif
        {{
#endif /* _Py_TAIL_CALL_INTERP */
            {INSTRUCTION_START_MARKER}
"""
    )
    generate_tier1_cases(analysis, outfile, lines)
    outfile.write(f"""
            {INSTRUCTION_END_MARKER}
#if !_Py_TAIL_CALL_INTERP
#if USE_COMPUTED_GOTOS
        _unknown_opcode:
#else
        EXTRA_CASES  // From pycore_opcode_metadata.h, a 'case' for each unused opcode
#endif
            /* Tell C compilers not to hold the opcode variable in the loop.
               next_instr points the current instruction without TARGET(). */
            opcode = next_instr->op.code;
            {UNKNOWN_OPCODE_HANDLER}

        }}

        /* This should never be reached. Every opcode should end with DISPATCH()
           or goto error. */
        Py_UNREACHABLE();
#endif /* _Py_TAIL_CALL_INTERP */
        {LABEL_START_MARKER}
""")
    out = CWriter(outfile, 2, lines)
    emitter = Emitter(out, analysis.labels)
    generate_tier1_labels(analysis, emitter)
    outfile.write(f"{LABEL_END_MARKER}\n")
    outfile.write(FOOTER)