mirror of https://github.com/python/cpython
65 lines
1.6 KiB
C
65 lines
1.6 KiB
C
#include "Python.h"
|
|
#include "opcode.h"
|
|
#include "pycore_interp.h"
|
|
#include "pycore_opcode_metadata.h"
|
|
#include "pycore_opcode_utils.h"
|
|
#include "pycore_pystate.h" // _PyInterpreterState_GET()
|
|
#include "pycore_uops.h"
|
|
#include "pycore_long.h"
|
|
#include "cpython/optimizer.h"
|
|
#include <stdbool.h>
|
|
#include <stdint.h>
|
|
#include <stddef.h>
|
|
#include "pycore_optimizer.h"
|
|
|
|
static void
|
|
remove_unneeded_uops(_PyUOpInstruction *buffer, int buffer_size)
|
|
{
|
|
int last_set_ip = -1;
|
|
bool maybe_invalid = false;
|
|
for (int pc = 0; pc < buffer_size; pc++) {
|
|
int opcode = buffer[pc].opcode;
|
|
if (opcode == _SET_IP) {
|
|
buffer[pc].opcode = NOP;
|
|
last_set_ip = pc;
|
|
}
|
|
else if (opcode == _CHECK_VALIDITY) {
|
|
if (maybe_invalid) {
|
|
maybe_invalid = false;
|
|
}
|
|
else {
|
|
buffer[pc].opcode = NOP;
|
|
}
|
|
}
|
|
else if (opcode == _JUMP_TO_TOP || opcode == _EXIT_TRACE) {
|
|
break;
|
|
}
|
|
else {
|
|
if (OPCODE_HAS_ESCAPES(opcode)) {
|
|
maybe_invalid = true;
|
|
if (last_set_ip >= 0) {
|
|
buffer[last_set_ip].opcode = _SET_IP;
|
|
}
|
|
}
|
|
if (OPCODE_HAS_ERROR(opcode) || opcode == _PUSH_FRAME) {
|
|
if (last_set_ip >= 0) {
|
|
buffer[last_set_ip].opcode = _SET_IP;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
int
|
|
_Py_uop_analyze_and_optimize(
|
|
PyCodeObject *co,
|
|
_PyUOpInstruction *buffer,
|
|
int buffer_size,
|
|
int curr_stacklen
|
|
)
|
|
{
|
|
remove_unneeded_uops(buffer, buffer_size);
|
|
return 0;
|
|
}
|