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gh-109214: Rename SAVE_IP to _SET_IP, and similar (#109285)

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* Rename SAVE_IP to _SET_IP
* Rename EXIT_TRACE to _EXIT_TRACE
* Rename SAVE_CURRENT_IP to _SAVE_CURRENT_IP
* Rename INSERT to _INSERT (This is for Ken Jin's abstract interpreter)
* Rename IS_NONE to _IS_NONE
* Rename JUMP_TO_TOP to _JUMP_TO_TOP
This commit is contained in:
Guido van Rossum 2023-09-11 15:39:19 -07:00 • committed by GitHub
parent 1ee50e2a78
commit fbaf77eb9b
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GPG key ID: 4AEE18F83AFDEB23
11 changed files with 117 additions and 117 deletions
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60
Python/optimizer.c
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@ -474,14 +474,14 @@ translate_bytecode_to_trace(
} \
reserved = (n); // Keep ADD_TO_TRACE / ADD_TO_STUB honest
// Reserve space for main+stub uops, plus 2 for SAVE_IP and EXIT_TRACE
// Reserve space for main+stub uops, plus 2 for _SET_IP and _EXIT_TRACE
#define RESERVE(main, stub) RESERVE_RAW((main) + (stub) + 2, uop_name(opcode))
// Trace stack operations (used by _PUSH_FRAME, _POP_FRAME)
#define TRACE_STACK_PUSH() \
if (trace_stack_depth >= TRACE_STACK_SIZE) { \
DPRINTF(2, "Trace stack overflow\n"); \
ADD_TO_TRACE(SAVE_IP, 0, 0); \
ADD_TO_TRACE(_SET_IP, 0, 0); \
goto done; \
} \
trace_stack[trace_stack_depth].code = code; \
@ -504,8 +504,8 @@ translate_bytecode_to_trace(
top: // Jump here after _PUSH_FRAME or likely branches
for (;;) {
RESERVE_RAW(2, "epilogue"); // Always need space for SAVE_IP and EXIT_TRACE
ADD_TO_TRACE(SAVE_IP, INSTR_IP(instr, code), 0);
RESERVE_RAW(2, "epilogue"); // Always need space for _SET_IP and _EXIT_TRACE
ADD_TO_TRACE(_SET_IP, INSTR_IP(instr, code), 0);
uint32_t opcode = instr->op.code;
uint32_t oparg = instr->op.arg;
@ -531,7 +531,7 @@ top: // Jump here after _PUSH_FRAME or likely branches
case POP_JUMP_IF_NONE:
{
RESERVE(2, 2);
ADD_TO_TRACE(IS_NONE, 0, 0);
ADD_TO_TRACE(_IS_NONE, 0, 0);
opcode = POP_JUMP_IF_TRUE;
goto pop_jump_if_bool;
}
@ -539,7 +539,7 @@ top: // Jump here after _PUSH_FRAME or likely branches
case POP_JUMP_IF_NOT_NONE:
{
RESERVE(2, 2);
ADD_TO_TRACE(IS_NONE, 0, 0);
ADD_TO_TRACE(_IS_NONE, 0, 0);
opcode = POP_JUMP_IF_FALSE;
goto pop_jump_if_bool;
}
@ -563,8 +563,8 @@ pop_jump_if_bool:
uop_name(opcode), oparg,
counter, bitcount, jump_likely, jump_sense, uop_name(uopcode));
ADD_TO_TRACE(uopcode, max_length, 0);
ADD_TO_STUB(max_length, SAVE_IP, INSTR_IP(stub_target, code), 0);
ADD_TO_STUB(max_length + 1, EXIT_TRACE, 0, 0);
ADD_TO_STUB(max_length, _SET_IP, INSTR_IP(stub_target, code), 0);
ADD_TO_STUB(max_length + 1, _EXIT_TRACE, 0, 0);
if (jump_likely) {
DPRINTF(2, "Jump likely (%x = %d bits), continue at byte offset %d\n",
instr[1].cache, bitcount, 2 * INSTR_IP(target_instr, code));
@ -578,7 +578,7 @@ pop_jump_if_bool:
{
if (instr + 2 - oparg == initial_instr && code == initial_code) {
RESERVE(1, 0);
ADD_TO_TRACE(JUMP_TO_TOP, 0, 0);
ADD_TO_TRACE(_JUMP_TO_TOP, 0, 0);
}
else {
DPRINTF(2, "JUMP_BACKWARD not to top ends trace\n");
@ -589,7 +589,7 @@ pop_jump_if_bool:
case JUMP_FORWARD:
{
RESERVE(0, 0);
// This will emit two SAVE_IP instructions; leave it to the optimizer
// This will emit two _SET_IP instructions; leave it to the optimizer
instr += oparg;
break;
}
@ -629,8 +629,8 @@ pop_jump_if_bool:
ADD_TO_TRACE(next_op, 0, 0);
ADD_TO_STUB(max_length + 0, POP_TOP, 0, 0);
ADD_TO_STUB(max_length + 1, SAVE_IP, INSTR_IP(target_instr, code), 0);
ADD_TO_STUB(max_length + 2, EXIT_TRACE, 0, 0);
ADD_TO_STUB(max_length + 1, _SET_IP, INSTR_IP(target_instr, code), 0);
ADD_TO_STUB(max_length + 2, _EXIT_TRACE, 0, 0);
break;
}
@ -638,7 +638,7 @@ pop_jump_if_bool:
{
const struct opcode_macro_expansion *expansion = &_PyOpcode_macro_expansion[opcode];
if (expansion->nuops > 0) {
// Reserve space for nuops (+ SAVE_IP + EXIT_TRACE)
// Reserve space for nuops (+ _SET_IP + _EXIT_TRACE)
int nuops = expansion->nuops;
RESERVE(nuops, 0);
if (expansion->uops[nuops-1].uop == _POP_FRAME) {
@ -682,7 +682,7 @@ pop_jump_if_bool:
case OPARG_BOTTOM: // Second half of super-instr
oparg = orig_oparg & 0xF;
break;
case OPARG_SAVE_IP: // op==SAVE_IP; oparg=next instr
case OPARG_SET_IP: // op==_SET_IP; oparg=next instr
oparg = INSTR_IP(instr + offset, code);
break;
@ -722,7 +722,7 @@ pop_jump_if_bool:
PyUnicode_AsUTF8(new_code->co_qualname),
PyUnicode_AsUTF8(new_code->co_filename),
new_code->co_firstlineno);
ADD_TO_TRACE(SAVE_IP, 0, 0);
ADD_TO_TRACE(_SET_IP, 0, 0);
goto done;
}
if (new_code->co_version != func_version) {
@ -730,7 +730,7 @@ pop_jump_if_bool:
// Perhaps it may happen again, so don't bother tracing.
// TODO: Reason about this -- is it better to bail or not?
DPRINTF(2, "Bailing because co_version != func_version\n");
ADD_TO_TRACE(SAVE_IP, 0, 0);
ADD_TO_TRACE(_SET_IP, 0, 0);
goto done;
}
// Increment IP to the return address
@ -746,7 +746,7 @@ pop_jump_if_bool:
2 * INSTR_IP(instr, code));
goto top;
}
ADD_TO_TRACE(SAVE_IP, 0, 0);
ADD_TO_TRACE(_SET_IP, 0, 0);
goto done;
}
}
@ -768,9 +768,9 @@ done:
TRACE_STACK_POP();
}
assert(code == initial_code);
// Skip short traces like SAVE_IP, LOAD_FAST, SAVE_IP, EXIT_TRACE
// Skip short traces like _SET_IP, LOAD_FAST, _SET_IP, _EXIT_TRACE
if (trace_length > 3) {
ADD_TO_TRACE(EXIT_TRACE, 0, 0);
ADD_TO_TRACE(_EXIT_TRACE, 0, 0);
DPRINTF(1,
"Created a trace for %s (%s:%d) at byte offset %d -- length %d+%d\n",
PyUnicode_AsUTF8(code->co_qualname),
@ -819,25 +819,25 @@ done:
static int
remove_unneeded_uops(_PyUOpInstruction *trace, int trace_length)
{
// Stage 1: Replace unneeded SAVE_IP uops with NOP.
// Note that we don't enter stubs, those SAVE_IPs are needed.
int last_save_ip = -1;
// Stage 1: Replace unneeded _SET_IP uops with NOP.
// Note that we don't enter stubs, those SET_IPs are needed.
int last_set_ip = -1;
int last_instr = 0;
bool need_ip = true;
for (int pc = 0; pc < trace_length; pc++) {
int opcode = trace[pc].opcode;
if (opcode == SAVE_CURRENT_IP) {
// Special case: never remove preceding SAVE_IP
last_save_ip = -1;
if (opcode == _SAVE_CURRENT_IP) {
// Special case: never remove preceding _SET_IP
last_set_ip = -1;
}
else if (opcode == SAVE_IP) {
if (!need_ip && last_save_ip >= 0) {
trace[last_save_ip].opcode = NOP;
else if (opcode == _SET_IP) {
if (!need_ip && last_set_ip >= 0) {
trace[last_set_ip].opcode = NOP;
}
need_ip = false;
last_save_ip = pc;
last_set_ip = pc;
}
else if (opcode == JUMP_TO_TOP || opcode == EXIT_TRACE) {
else if (opcode == _JUMP_TO_TOP || opcode == _EXIT_TRACE) {
last_instr = pc + 1;
break;
}