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GH-120619: Clean up RETURN_VALUE instruction (GH-120624)

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* Rename _POP_FRAME to _RETURN_VALUE as it returns a value as well as popping a frame.

* Remove remaining _POP_FRAMEs
This commit is contained in:
Mark Shannon 2024-06-17 14:40:11 +01:00 committed by GitHub
parent 79e09e60d8
commit 274f844830
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GPG key ID: B5690EEEBB952194
11 changed files with 67 additions and 61 deletions
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8
Include/internal/pycore_opcode_metadata.h generated
View file

@ -831,11 +831,11 @@ int _PyOpcode_num_pushed(int opcode, int oparg) {
case RESUME_CHECK:
return 0;
case RETURN_CONST:
return 0;
return 1;
case RETURN_GENERATOR:
return 1;
case RETURN_VALUE:
return 0;
return 1;
case SEND:
return 2;
case SEND_GEN:
@ -1346,9 +1346,9 @@ _PyOpcode_macro_expansion[256] = {
[PUSH_EXC_INFO] = { .nuops = 1, .uops = { { _PUSH_EXC_INFO, 0, 0 } } },
[PUSH_NULL] = { .nuops = 1, .uops = { { _PUSH_NULL, 0, 0 } } },
[RESUME_CHECK] = { .nuops = 1, .uops = { { _RESUME_CHECK, 0, 0 } } },
[RETURN_CONST] = { .nuops = 2, .uops = { { _LOAD_CONST, 0, 0 }, { _POP_FRAME, 0, 0 } } },
[RETURN_CONST] = { .nuops = 2, .uops = { { _LOAD_CONST, 0, 0 }, { _RETURN_VALUE, 0, 0 } } },
[RETURN_GENERATOR] = { .nuops = 1, .uops = { { _RETURN_GENERATOR, 0, 0 } } },
[RETURN_VALUE] = { .nuops = 1, .uops = { { _POP_FRAME, 0, 0 } } },
[RETURN_VALUE] = { .nuops = 1, .uops = { { _RETURN_VALUE, 0, 0 } } },
[SETUP_ANNOTATIONS] = { .nuops = 1, .uops = { { _SETUP_ANNOTATIONS, 0, 0 } } },
[SET_ADD] = { .nuops = 1, .uops = { { _SET_ADD, 0, 0 } } },
[SET_FUNCTION_ATTRIBUTE] = { .nuops = 1, .uops = { { _SET_FUNCTION_ATTRIBUTE, 0, 0 } } },

56
Include/internal/pycore_uop_ids.h generated
View file

@ -226,51 +226,51 @@ extern "C" {
#define _MATCH_SEQUENCE MATCH_SEQUENCE
#define _NOP NOP
#define _POP_EXCEPT POP_EXCEPT
#define _POP_FRAME 426
#define _POP_JUMP_IF_FALSE 427
#define _POP_JUMP_IF_TRUE 428
#define _POP_JUMP_IF_FALSE 426
#define _POP_JUMP_IF_TRUE 427
#define _POP_TOP POP_TOP
#define _POP_TOP_LOAD_CONST_INLINE_BORROW 429
#define _POP_TOP_LOAD_CONST_INLINE_BORROW 428
#define _PUSH_EXC_INFO PUSH_EXC_INFO
#define _PUSH_FRAME 430
#define _PUSH_FRAME 429
#define _PUSH_NULL PUSH_NULL
#define _PY_FRAME_GENERAL 431
#define _REPLACE_WITH_TRUE 432
#define _PY_FRAME_GENERAL 430
#define _REPLACE_WITH_TRUE 431
#define _RESUME_CHECK RESUME_CHECK
#define _RETURN_GENERATOR RETURN_GENERATOR
#define _SAVE_RETURN_OFFSET 433
#define _SEND 434
#define _RETURN_VALUE RETURN_VALUE
#define _SAVE_RETURN_OFFSET 432
#define _SEND 433
#define _SEND_GEN SEND_GEN
#define _SETUP_ANNOTATIONS SETUP_ANNOTATIONS
#define _SET_ADD SET_ADD
#define _SET_FUNCTION_ATTRIBUTE SET_FUNCTION_ATTRIBUTE
#define _SET_UPDATE SET_UPDATE
#define _START_EXECUTOR 435
#define _STORE_ATTR 436
#define _STORE_ATTR_INSTANCE_VALUE 437
#define _STORE_ATTR_SLOT 438
#define _STORE_ATTR_WITH_HINT 439
#define _START_EXECUTOR 434
#define _STORE_ATTR 435
#define _STORE_ATTR_INSTANCE_VALUE 436
#define _STORE_ATTR_SLOT 437
#define _STORE_ATTR_WITH_HINT 438
#define _STORE_DEREF STORE_DEREF
#define _STORE_FAST 440
#define _STORE_FAST_0 441
#define _STORE_FAST_1 442
#define _STORE_FAST_2 443
#define _STORE_FAST_3 444
#define _STORE_FAST_4 445
#define _STORE_FAST_5 446
#define _STORE_FAST_6 447
#define _STORE_FAST_7 448
#define _STORE_FAST 439
#define _STORE_FAST_0 440
#define _STORE_FAST_1 441
#define _STORE_FAST_2 442
#define _STORE_FAST_3 443
#define _STORE_FAST_4 444
#define _STORE_FAST_5 445
#define _STORE_FAST_6 446
#define _STORE_FAST_7 447
#define _STORE_FAST_LOAD_FAST STORE_FAST_LOAD_FAST
#define _STORE_FAST_STORE_FAST STORE_FAST_STORE_FAST
#define _STORE_GLOBAL STORE_GLOBAL
#define _STORE_NAME STORE_NAME
#define _STORE_SLICE STORE_SLICE
#define _STORE_SUBSCR 449
#define _STORE_SUBSCR 448
#define _STORE_SUBSCR_DICT STORE_SUBSCR_DICT
#define _STORE_SUBSCR_LIST_INT STORE_SUBSCR_LIST_INT
#define _SWAP SWAP
#define _TIER2_RESUME_CHECK 450
#define _TO_BOOL 451
#define _TIER2_RESUME_CHECK 449
#define _TO_BOOL 450
#define _TO_BOOL_BOOL TO_BOOL_BOOL
#define _TO_BOOL_INT TO_BOOL_INT
#define _TO_BOOL_LIST TO_BOOL_LIST
@ -280,13 +280,13 @@ extern "C" {
#define _UNARY_NEGATIVE UNARY_NEGATIVE
#define _UNARY_NOT UNARY_NOT
#define _UNPACK_EX UNPACK_EX
#define _UNPACK_SEQUENCE 452
#define _UNPACK_SEQUENCE 451
#define _UNPACK_SEQUENCE_LIST UNPACK_SEQUENCE_LIST
#define _UNPACK_SEQUENCE_TUPLE UNPACK_SEQUENCE_TUPLE
#define _UNPACK_SEQUENCE_TWO_TUPLE UNPACK_SEQUENCE_TWO_TUPLE
#define _WITH_EXCEPT_START WITH_EXCEPT_START
#define _YIELD_VALUE YIELD_VALUE
#define MAX_UOP_ID 452
#define MAX_UOP_ID 451
#ifdef __cplusplus
}

6
Include/internal/pycore_uop_metadata.h generated
View file

@ -87,7 +87,7 @@ const uint16_t _PyUop_Flags[MAX_UOP_ID+1] = {
[_DELETE_SUBSCR] = HAS_ERROR_FLAG | HAS_ESCAPES_FLAG,
[_CALL_INTRINSIC_1] = HAS_ARG_FLAG | HAS_ERROR_FLAG | HAS_ESCAPES_FLAG,
[_CALL_INTRINSIC_2] = HAS_ARG_FLAG | HAS_ERROR_FLAG | HAS_ESCAPES_FLAG,
[_POP_FRAME] = 0,
[_RETURN_VALUE] = 0,
[_GET_AITER] = HAS_ERROR_FLAG | HAS_ESCAPES_FLAG,
[_GET_ANEXT] = HAS_ERROR_FLAG | HAS_ERROR_NO_POP_FLAG | HAS_ESCAPES_FLAG,
[_GET_AWAITABLE] = HAS_ARG_FLAG | HAS_ERROR_FLAG | HAS_ESCAPES_FLAG,
@ -453,7 +453,6 @@ const char *const _PyOpcode_uop_name[MAX_UOP_ID+1] = {
[_MATCH_SEQUENCE] = "_MATCH_SEQUENCE",
[_NOP] = "_NOP",
[_POP_EXCEPT] = "_POP_EXCEPT",
[_POP_FRAME] = "_POP_FRAME",
[_POP_TOP] = "_POP_TOP",
[_POP_TOP_LOAD_CONST_INLINE_BORROW] = "_POP_TOP_LOAD_CONST_INLINE_BORROW",
[_PUSH_EXC_INFO] = "_PUSH_EXC_INFO",
@ -463,6 +462,7 @@ const char *const _PyOpcode_uop_name[MAX_UOP_ID+1] = {
[_REPLACE_WITH_TRUE] = "_REPLACE_WITH_TRUE",
[_RESUME_CHECK] = "_RESUME_CHECK",
[_RETURN_GENERATOR] = "_RETURN_GENERATOR",
[_RETURN_VALUE] = "_RETURN_VALUE",
[_SAVE_RETURN_OFFSET] = "_SAVE_RETURN_OFFSET",
[_SETUP_ANNOTATIONS] = "_SETUP_ANNOTATIONS",
[_SET_ADD] = "_SET_ADD",
@ -650,7 +650,7 @@ int _PyUop_num_popped(int opcode, int oparg)
return 1;
case _CALL_INTRINSIC_2:
return 2;
case _POP_FRAME:
case _RETURN_VALUE:
return 1;
case _GET_AITER:
return 1;

12
Lib/test/test_capi/test_opt.py
View file

@ -1024,7 +1024,7 @@ def testfunc(n):
uops_and_operands = [(opcode, operand) for opcode, _, _, operand in ex]
uop_names = [uop[0] for uop in uops_and_operands]
self.assertEqual(uop_names.count("_PUSH_FRAME"), 2)
self.assertEqual(uop_names.count("_POP_FRAME"), 2)
self.assertEqual(uop_names.count("_RETURN_VALUE"), 2)
self.assertEqual(uop_names.count("_CHECK_STACK_SPACE"), 0)
self.assertEqual(uop_names.count("_CHECK_STACK_SPACE_OPERAND"), 1)
# sequential calls: max(12, 13) == 13
@ -1051,7 +1051,7 @@ def testfunc(n):
uops_and_operands = [(opcode, operand) for opcode, _, _, operand in ex]
uop_names = [uop[0] for uop in uops_and_operands]
self.assertEqual(uop_names.count("_PUSH_FRAME"), 2)
self.assertEqual(uop_names.count("_POP_FRAME"), 2)
self.assertEqual(uop_names.count("_RETURN_VALUE"), 2)
self.assertEqual(uop_names.count("_CHECK_STACK_SPACE"), 0)
self.assertEqual(uop_names.count("_CHECK_STACK_SPACE_OPERAND"), 1)
# nested calls: 15 + 12 == 27
@ -1086,7 +1086,7 @@ def testfunc(n):
uops_and_operands = [(opcode, operand) for opcode, _, _, operand in ex]
uop_names = [uop[0] for uop in uops_and_operands]
self.assertEqual(uop_names.count("_PUSH_FRAME"), 4)
self.assertEqual(uop_names.count("_POP_FRAME"), 4)
self.assertEqual(uop_names.count("_RETURN_VALUE"), 4)
self.assertEqual(uop_names.count("_CHECK_STACK_SPACE"), 0)
self.assertEqual(uop_names.count("_CHECK_STACK_SPACE_OPERAND"), 1)
# max(12, 18 + max(12, 13)) == 31
@ -1122,7 +1122,7 @@ def testfunc(n):
uops_and_operands = [(opcode, operand) for opcode, _, _, operand in ex]
uop_names = [uop[0] for uop in uops_and_operands]
self.assertEqual(uop_names.count("_PUSH_FRAME"), 4)
self.assertEqual(uop_names.count("_POP_FRAME"), 4)
self.assertEqual(uop_names.count("_RETURN_VALUE"), 4)
self.assertEqual(uop_names.count("_CHECK_STACK_SPACE"), 0)
self.assertEqual(uop_names.count("_CHECK_STACK_SPACE_OPERAND"), 1)
# max(18 + max(12, 13), 12) == 31
@ -1166,7 +1166,7 @@ def testfunc(n):
uops_and_operands = [(opcode, operand) for opcode, _, _, operand in ex]
uop_names = [uop[0] for uop in uops_and_operands]
self.assertEqual(uop_names.count("_PUSH_FRAME"), 15)
self.assertEqual(uop_names.count("_POP_FRAME"), 15)
self.assertEqual(uop_names.count("_RETURN_VALUE"), 15)
self.assertEqual(uop_names.count("_CHECK_STACK_SPACE"), 0)
self.assertEqual(uop_names.count("_CHECK_STACK_SPACE_OPERAND"), 1)
@ -1260,7 +1260,7 @@ def testfunc(n):
uops_and_operands = [(opcode, operand) for opcode, _, _, operand in ex]
uop_names = [uop[0] for uop in uops_and_operands]
self.assertEqual(uop_names.count("_PUSH_FRAME"), 2)
self.assertEqual(uop_names.count("_POP_FRAME"), 0)
self.assertEqual(uop_names.count("_RETURN_VALUE"), 0)
self.assertEqual(uop_names.count("_CHECK_STACK_SPACE"), 1)
self.assertEqual(uop_names.count("_CHECK_STACK_SPACE_OPERAND"), 1)
largest_stack = _testinternalcapi.get_co_framesize(dummy15.__code__)

9
Python/bytecodes.c
View file

@ -827,7 +827,7 @@ dummy_func(
// We definitely pop the return value off the stack on entry.
// We also push it onto the stack on exit, but that's a
// different frame, and it's accounted for by _PUSH_FRAME.
op(_POP_FRAME, (retval --)) {
inst(RETURN_VALUE, (retval -- res)) {
#if TIER_ONE
assert(frame != &entry_frame);
#endif
@ -839,15 +839,12 @@ dummy_func(
_PyInterpreterFrame *dying = frame;
frame = tstate->current_frame = dying->previous;
_PyEval_FrameClearAndPop(tstate, dying);
_PyFrame_StackPush(frame, retval);
LOAD_SP();
LOAD_IP(frame->return_offset);
res = retval;
LLTRACE_RESUME_FRAME();
}
macro(RETURN_VALUE) =
_POP_FRAME;
inst(INSTRUMENTED_RETURN_VALUE, (retval --)) {
int err = _Py_call_instrumentation_arg(
tstate, PY_MONITORING_EVENT_PY_RETURN,
@ -869,7 +866,7 @@ dummy_func(
macro(RETURN_CONST) =
LOAD_CONST +
_POP_FRAME;
RETURN_VALUE;
inst(INSTRUMENTED_RETURN_CONST, (--)) {
PyObject *retval = GETITEM(FRAME_CO_CONSTS, oparg);

7
Python/executor_cases.c.h generated
View file

@ -971,8 +971,9 @@
break;
}
case _POP_FRAME: {
case _RETURN_VALUE: {
PyObject *retval;
PyObject *res;
retval = stack_pointer[-1];
#if TIER_ONE
assert(frame != &entry_frame);
@ -985,10 +986,12 @@
_PyInterpreterFrame *dying = frame;
frame = tstate->current_frame = dying->previous;
_PyEval_FrameClearAndPop(tstate, dying);
_PyFrame_StackPush(frame, retval);
LOAD_SP();
LOAD_IP(frame->return_offset);
res = retval;
LLTRACE_RESUME_FRAME();
stack_pointer[0] = res;
stack_pointer += 1;
break;
}

12
Python/generated_cases.c.h generated
View file

@ -5202,12 +5202,13 @@
INSTRUCTION_STATS(RETURN_CONST);
PyObject *value;
PyObject *retval;
PyObject *res;
// _LOAD_CONST
{
value = GETITEM(FRAME_CO_CONSTS, oparg);
Py_INCREF(value);
}
// _POP_FRAME
// _RETURN_VALUE
retval = value;
{
#if TIER_ONE
@ -5220,11 +5221,13 @@
_PyInterpreterFrame *dying = frame;
frame = tstate->current_frame = dying->previous;
_PyEval_FrameClearAndPop(tstate, dying);
_PyFrame_StackPush(frame, retval);
LOAD_SP();
LOAD_IP(frame->return_offset);
res = retval;
LLTRACE_RESUME_FRAME();
}
stack_pointer[0] = res;
stack_pointer += 1;
DISPATCH();
}
@ -5265,6 +5268,7 @@
next_instr += 1;
INSTRUCTION_STATS(RETURN_VALUE);
PyObject *retval;
PyObject *res;
retval = stack_pointer[-1];
#if TIER_ONE
assert(frame != &entry_frame);
@ -5277,10 +5281,12 @@
_PyInterpreterFrame *dying = frame;
frame = tstate->current_frame = dying->previous;
_PyEval_FrameClearAndPop(tstate, dying);
_PyFrame_StackPush(frame, retval);
LOAD_SP();
LOAD_IP(frame->return_offset);
res = retval;
LLTRACE_RESUME_FRAME();
stack_pointer[0] = res;
stack_pointer += 1;
DISPATCH();
}

8
Python/optimizer.c
View file

@ -537,7 +537,7 @@ add_to_trace(
// Reserve space for N uops, plus 3 for _SET_IP, _CHECK_VALIDITY and _EXIT_TRACE
#define RESERVE(needed) RESERVE_RAW((needed) + 3, _PyUOpName(opcode))
// Trace stack operations (used by _PUSH_FRAME, _POP_FRAME)
// Trace stack operations (used by _PUSH_FRAME, _RETURN_VALUE)
#define TRACE_STACK_PUSH() \
if (trace_stack_depth >= TRACE_STACK_SIZE) { \
DPRINTF(2, "Trace stack overflow\n"); \
@ -748,10 +748,10 @@ translate_bytecode_to_trace(
int nuops = expansion->nuops;
RESERVE(nuops + 1); /* One extra for exit */
int16_t last_op = expansion->uops[nuops-1].uop;
if (last_op == _POP_FRAME || last_op == _RETURN_GENERATOR || last_op == _YIELD_VALUE) {
if (last_op == _RETURN_VALUE || last_op == _RETURN_GENERATOR || last_op == _YIELD_VALUE) {
// Check for trace stack underflow now:
// We can't bail e.g. in the middle of
// LOAD_CONST + _POP_FRAME.
// LOAD_CONST + _RETURN_VALUE.
if (trace_stack_depth == 0) {
DPRINTF(2, "Trace stack underflow\n");
OPT_STAT_INC(trace_stack_underflow);
@ -810,7 +810,7 @@ translate_bytecode_to_trace(
Py_FatalError("garbled expansion");
}
if (uop == _POP_FRAME || uop == _RETURN_GENERATOR || uop == _YIELD_VALUE) {
if (uop == _RETURN_VALUE || uop == _RETURN_GENERATOR || uop == _YIELD_VALUE) {
TRACE_STACK_POP();
/* Set the operand to the function or code object returned to,
* to assist optimization passes. (See _PUSH_FRAME below.)

6
Python/optimizer_analysis.c
View file

@ -265,7 +265,7 @@ remove_globals(_PyInterpreterFrame *frame, _PyUOpInstruction *buffer,
}
break;
}
case _POP_FRAME:
case _RETURN_VALUE:
{
builtins_watched >>= 1;
globals_watched >>= 1;
@ -365,13 +365,13 @@ eliminate_pop_guard(_PyUOpInstruction *this_instr, bool exit)
}
}
/* _PUSH_FRAME/_POP_FRAME's operand can be 0, a PyFunctionObject *, or a
/* _PUSH_FRAME/_RETURN_VALUE's operand can be 0, a PyFunctionObject *, or a
* PyCodeObject *. Retrieve the code object if possible.
*/
static PyCodeObject *
get_code(_PyUOpInstruction *op)
{
assert(op->opcode == _PUSH_FRAME || op->opcode == _POP_FRAME || op->opcode == _RETURN_GENERATOR);
assert(op->opcode == _PUSH_FRAME || op->opcode == _RETURN_VALUE || op->opcode == _RETURN_GENERATOR);
PyCodeObject *co = NULL;
uint64_t operand = op->operand;
if (operand == 0) {

2
Python/optimizer_bytecodes.c
View file

@ -606,7 +606,7 @@ dummy_func(void) {
ctx->done = true;
}
op(_POP_FRAME, (retval -- res)) {
op(_RETURN_VALUE, (retval -- res)) {
SYNC_SP();
ctx->frame->stack_pointer = stack_pointer;
frame_pop(ctx);

2
Python/optimizer_cases.c.h generated
View file

@ -558,7 +558,7 @@
break;
}
case _POP_FRAME: {
case _RETURN_VALUE: {
_Py_UopsSymbol *retval;
_Py_UopsSymbol *res;
retval = stack_pointer[-1];