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bpo-46841: Quicken code in-place (GH-31888)

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* Moves the bytecode to the end of the corresponding PyCodeObject, and quickens it in-place.

* Removes the almost-always-unused co_varnames, co_freevars, and co_cellvars member caches

* _PyOpcode_Deopt is a new mapping from all opcodes to their un-quickened forms.

* _PyOpcode_InlineCacheEntries is renamed to _PyOpcode_Caches

* _Py_IncrementCountAndMaybeQuicken is renamed to _PyCode_Warmup

* _Py_Quicken is renamed to _PyCode_Quicken

* _co_quickened is renamed to _co_code_adaptive (and is now a read-only memoryview).

* Do not emit unused nonzero opargs anymore in the compiler.
This commit is contained in:
Brandt Bucher 2022-03-21 04:11:17 -07:00 • committed by GitHub
parent 08eb754d84
commit 2bde6827ea
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GPG key ID: 4AEE18F83AFDEB23
18 changed files with 832 additions and 688 deletions
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17
Tools/scripts/generate_opcode_h.py
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@ -28,7 +28,7 @@ footer = """
#endif /* !Py_OPCODE_H */
"""
DEFINE = "#define {:<31} {:>3}\n"
DEFINE = "#define {:<38} {:>3}\n"
UINT32_MASK = (1<<32)-1
@ -75,16 +75,27 @@ def main(opcode_py, outfile='Include/opcode.h'):
fobj.write(DEFINE.format(name, next_op))
used[next_op] = True
fobj.write(DEFINE.format('DO_TRACING', 255))
fobj.write("\nextern const uint8_t _PyOpcode_InlineCacheEntries[256];\n")
fobj.write("\nextern const uint8_t _PyOpcode_Caches[256];\n")
fobj.write("\nextern const uint8_t _PyOpcode_Deopt[256];\n")
fobj.write("\n#ifdef NEED_OPCODE_TABLES\n")
write_int_array_from_ops("_PyOpcode_RelativeJump", opcode['hasjrel'], fobj)
write_int_array_from_ops("_PyOpcode_Jump", opcode['hasjrel'] + opcode['hasjabs'], fobj)
fobj.write("\nconst uint8_t _PyOpcode_InlineCacheEntries[256] = {\n")
fobj.write("\nconst uint8_t _PyOpcode_Caches[256] = {\n")
for i, entries in enumerate(opcode["_inline_cache_entries"]):
if entries:
fobj.write(f" [{opname[i]}] = {entries},\n")
fobj.write("};\n")
deoptcodes = {}
for basic in opmap:
deoptcodes[basic] = basic
for basic, family in opcode["_specializations"].items():
for specialized in family:
deoptcodes[specialized] = basic
fobj.write("\nconst uint8_t _PyOpcode_Deopt[256] = {\n")
for opt, deopt in sorted(deoptcodes.items()):
fobj.write(f" [{opt}] = {deopt},\n")
fobj.write("};\n")
fobj.write("#endif /* OPCODE_TABLES */\n")
fobj.write("\n")