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GH-118095: Allow a variant of RESUME_CHECK in tier 2 (GH-118286)

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Mark Shannon 2024-04-29 07:54:05 +01:00 • committed by GitHub
parent aa8f6d2708
commit ab6eda0ee5
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6 changed files with 189 additions and 103 deletions
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20
Python/optimizer.c
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@ -690,6 +690,12 @@ top: // Jump here after _PUSH_FRAME or likely branches
break;
}
case RESUME:
/* Use a special tier 2 version of RESUME_CHECK to allow traces to
* start with RESUME_CHECK */
ADD_TO_TRACE(_TIER2_RESUME_CHECK, 0, 0, target);
break;
default:
{
const struct opcode_macro_expansion *expansion = &_PyOpcode_macro_expansion[opcode];
@ -967,7 +973,18 @@ prepare_for_execution(_PyUOpInstruction *buffer, int length)
int32_t target = (int32_t)uop_get_target(inst);
if (_PyUop_Flags[opcode] & (HAS_EXIT_FLAG | HAS_DEOPT_FLAG)) {
if (target != current_jump_target) {
uint16_t exit_op = (_PyUop_Flags[opcode] & HAS_EXIT_FLAG) ? _SIDE_EXIT : _DEOPT;
uint16_t exit_op;
if (_PyUop_Flags[opcode] & HAS_EXIT_FLAG) {
if (opcode == _TIER2_RESUME_CHECK) {
exit_op = _EVAL_BREAKER_EXIT;
}
else {
exit_op = _SIDE_EXIT;
}
}
else {
exit_op = _DEOPT;
}
make_exit(&buffer[next_spare], exit_op, target);
current_jump_target = target;
current_jump = next_spare;
@ -1075,6 +1092,7 @@ sanity_check(_PyExecutorObject *executor)
CHECK(
opcode == _DEOPT ||
opcode == _SIDE_EXIT ||
opcode == _EVAL_BREAKER_EXIT ||
opcode == _ERROR_POP_N);
if (opcode == _SIDE_EXIT) {
CHECK(inst->format == UOP_FORMAT_EXIT);