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gh-142764: Restore REPLACE_OPCODE_IF_EVALUATES_PURE optimization #143335

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Merged
Fidget-Spinner merged 5 commits into from
Jan 9, 2026
Merged

gh-142764: Restore REPLACE_OPCODE_IF_EVALUATES_PURE optimization #143335

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fe91ac3
Restore REPLACE_OPCODE_IF_EVALUATES_PURE optimization
Fidget-Spinner Jan 1, 2026
709a45f
Get rid of spurious warnings
Fidget-Spinner Jan 1, 2026
cd23a07
make mypy happy
Fidget-Spinner Jan 1, 2026
c62c308
Add test for insert 1
Fidget-Spinner Jan 1, 2026
4c5d16e
Merge remote-tracking branch 'upstream/main' into replace_opcodes_Fix
Fidget-Spinner Jan 9, 2026
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Get rid of spurious warnings
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@Fidget-Spinner
Fidget-Spinner committed Jan 1, 2026
commit 709a45f266bac263aa6101930754c021ea68d88e
2 changes: 2 additions & 0 deletions Lib/test/test_generated_cases.py
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Original file line number Diff line number Diff line change
Expand Up @@ -2541,6 +2541,8 @@ def test_replace_opcode_binop_one_output_insert(self):
l_stackref = left;
r_stackref = right;
/* End of uop copied from bytecodes for constant evaluation */
(void)l_stackref;
(void)r_stackref;
res = sym_new_const_steal(ctx, PyStackRef_AsPyObjectSteal(res_stackref));
CHECK_STACK_BOUNDS(1);
stack_pointer[-2] = res;
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12 changes: 12 additions & 0 deletions Python/optimizer_cases.c.h
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3 changes: 3 additions & 0 deletions Tools/cases_generator/optimizer_generator.py
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Original file line number Diff line number Diff line change
Expand Up @@ -227,6 +227,9 @@ def replace_opcode_if_evaluates_pure(
emitter.emit_tokens(self.original_uop, storage, inst=None, emit_braces=False)
self.out.start_line()
emitter.emit("/* End of uop copied from bytecodes for constant evaluation */\n")
for outp in self.original_uop.stack.outputs:
if not outp.name == output_identifier.text:
emitter.emit(f"(void){outp.name}_stackref;\n")

# Output stackref is created from new reference.
emitter.emit(f"{output_identifier.text} = sym_new_const_steal(ctx, PyStackRef_AsPyObjectSteal({output_identifier.text}_stackref));\n")
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