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gh-117288: Allocate fewer label IDs in _PyCfg_ToInstructionSequence (#117290)

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Irit Katriel 2024-03-27 17:38:19 +00:00 • committed by GitHub
parent 74c8568d07
commit 262fb911ab
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4 changed files with 37 additions and 6 deletions
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Python/flowgraph.c
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@ -2717,13 +2717,14 @@ _PyCfg_ToInstructionSequence(cfg_builder *g, _PyCompile_InstructionSequence *seq
int lbl = 0;
for (basicblock *b = g->g_entryblock; b != NULL; b = b->b_next) {
b->b_label = (jump_target_label){lbl};
lbl += b->b_iused;
lbl += 1;
}
for (basicblock *b = g->g_entryblock; b != NULL; b = b->b_next) {
RETURN_IF_ERROR(_PyCompile_InstructionSequence_UseLabel(seq, b->b_label.id));
for (int i = 0; i < b->b_iused; i++) {
cfg_instr *instr = &b->b_instr[i];
if (OPCODE_HAS_JUMP(instr->i_opcode) || is_block_push(instr)) {
if (HAS_TARGET(instr->i_opcode)) {
/* Set oparg to the label id (it will later be mapped to an offset) */
instr->i_oparg = instr->i_target->b_label.id;
}
RETURN_IF_ERROR(