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GH-121784: Generate an error during code gen if a variable is marked unused, but is used and thus cached in a prior uop. (#121788)

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* Reject uop definitions that declare values as 'unused' that are already cached by prior uops

* Track which variables are defined and only load from memory when needed

* Support explicit `flush` in macro definitions. 

* Make sure stack is flushed in where needed.
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Mark Shannon 2024-07-18 12:49:24 +01:00 • committed by GitHub
parent 169324c27a
commit 3eacfc1a4d
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9 changed files with 443 additions and 255 deletions
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4
Tools/cases_generator/optimizer_generator.py
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@ -23,7 +23,7 @@ from generators_common import (
from cwriter import CWriter
from typing import TextIO, Iterator
from lexer import Token
from stack import Stack, SizeMismatch
from stack import Stack, StackError
DEFAULT_OUTPUT = ROOT / "Python/optimizer_cases.c.h"
DEFAULT_ABSTRACT_INPUT = (ROOT / "Python/optimizer_bytecodes.c").absolute().as_posix()
@ -141,7 +141,7 @@ def write_uop(
out.emit(stack.push(var))
out.start_line()
stack.flush(out, cast_type="_Py_UopsSymbol *", extract_bits=True)
except SizeMismatch as ex:
except StackError as ex:
raise analysis_error(ex.args[0], uop.body[0])