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gh-130415: Narrow types to constants in branches involving specialized comparisons with a constant (GH-144150)

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reiden 2026-01-24 18:02:08 +08:00 • committed by GitHub
parent 29840247ff
commit 6d972e0104
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6 changed files with 360 additions and 8 deletions
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36
Python/optimizer_bytecodes.c
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@ -521,21 +521,51 @@ dummy_func(void) {
}
op(_COMPARE_OP_INT, (left, right -- res, l, r)) {
res = sym_new_type(ctx, &PyBool_Type);
int cmp_mask = oparg & (COMPARE_LT_MASK | COMPARE_GT_MASK | COMPARE_EQ_MASK);
if (cmp_mask == COMPARE_EQ_MASK) {
res = sym_new_predicate(ctx, left, right, JIT_PRED_EQ);
}
else if (cmp_mask == (COMPARE_LT_MASK | COMPARE_GT_MASK)) {
res = sym_new_predicate(ctx, left, right, JIT_PRED_NE);
}
else {
res = sym_new_type(ctx, &PyBool_Type);
}
l = left;
r = right;
REPLACE_OPCODE_IF_EVALUATES_PURE(left, right, res);
}
op(_COMPARE_OP_FLOAT, (left, right -- res, l, r)) {
res = sym_new_type(ctx, &PyBool_Type);
int cmp_mask = oparg & (COMPARE_LT_MASK | COMPARE_GT_MASK | COMPARE_EQ_MASK);
if (cmp_mask == COMPARE_EQ_MASK) {
res = sym_new_predicate(ctx, left, right, JIT_PRED_EQ);
}
else if (cmp_mask == (COMPARE_LT_MASK | COMPARE_GT_MASK)) {
res = sym_new_predicate(ctx, left, right, JIT_PRED_NE);
}
else {
res = sym_new_type(ctx, &PyBool_Type);
}
l = left;
r = right;
REPLACE_OPCODE_IF_EVALUATES_PURE(left, right, res);
}
op(_COMPARE_OP_STR, (left, right -- res, l, r)) {
res = sym_new_type(ctx, &PyBool_Type);
int cmp_mask = oparg & (COMPARE_LT_MASK | COMPARE_GT_MASK | COMPARE_EQ_MASK);
if (cmp_mask == COMPARE_EQ_MASK) {
res = sym_new_predicate(ctx, left, right, JIT_PRED_EQ);
}
else if (cmp_mask == (COMPARE_LT_MASK | COMPARE_GT_MASK)) {
res = sym_new_predicate(ctx, left, right, JIT_PRED_NE);
}
else {
res = sym_new_type(ctx, &PyBool_Type);
}
l = left;
r = right;
REPLACE_OPCODE_IF_EVALUATES_PURE(left, right, res);