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Revert "GH-128914: Remove conditional stack effects from bytecodes.c and the code generators (GH-128918)" (GH-129202)

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The commit introduced a ~2.5-3% regression in the free threading build.

This reverts commit ab61d3f430.
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Sam Gross 2025-01-23 04:26:25 -05:00 • committed by GitHub
parent d7d066c3ab
commit a10f99375e
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GPG key ID: B5690EEEBB952194
44 changed files with 1679 additions and 1460 deletions
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6
Python/flowgraph.c
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@ -1836,6 +1836,12 @@ optimize_basic_block(PyObject *const_cache, basicblock *bb, PyObject *consts)
INSTR_SET_OP0(inst, NOP);
}
break;
case LOAD_GLOBAL:
if (nextop == PUSH_NULL && (oparg & 1) == 0) {
INSTR_SET_OP1(inst, LOAD_GLOBAL, oparg | 1);
INSTR_SET_OP0(&bb->b_instr[i + 1], NOP);
}
break;
case COMPARE_OP:
if (nextop == TO_BOOL) {
INSTR_SET_OP0(inst, NOP);