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Move some opcodes to top of big eval_frame switch statement. Skip

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things_to_do block for a few common opcodes that don't do any real
work.  Closes SF patch #512256.
This commit is contained in:
Neil Schemenauer 2002-02-17 19:10:14 +00:00
parent 54e5b89d77
commit 6354386d65
1 changed files with 45 additions and 44 deletions
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89
Python/ceval.c
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@ -680,6 +680,7 @@ eval_frame(PyFrameObject *f)
#endif #endif
} }
fast_next_opcode:
/* Extract opcode and argument */ /* Extract opcode and argument */
#if defined(Py_DEBUG) || defined(LLTRACE) #if defined(Py_DEBUG) || defined(LLTRACE)
@ -724,10 +725,53 @@ eval_frame(PyFrameObject *f)
/* case STOP_CODE: this is an error! */ /* case STOP_CODE: this is an error! */
case SET_LINENO:
#ifdef LLTRACE
if (lltrace)
printf("--- %s:%d \n", filename, oparg);
#endif
f->f_lineno = oparg;
if (tstate->c_tracefunc == NULL || tstate->tracing)
goto fast_next_opcode;
/* Trace each line of code reached */
f->f_lasti = INSTR_OFFSET();
/* Inline call_trace() for performance: */
tstate->tracing++;
tstate->use_tracing = 0;
err = (tstate->c_tracefunc)(tstate->c_traceobj, f,
PyTrace_LINE, Py_None);
tstate->use_tracing = (tstate->c_tracefunc
|| tstate->c_profilefunc);
tstate->tracing--;
break;
case LOAD_FAST:
x = GETLOCAL(oparg);
if (x != NULL) {
Py_INCREF(x);
PUSH(x);
goto fast_next_opcode;
}
format_exc_check_arg(PyExc_UnboundLocalError,
UNBOUNDLOCAL_ERROR_MSG,
PyTuple_GetItem(co->co_varnames, oparg));
break;
case LOAD_CONST:
x = GETCONST(oparg);
Py_INCREF(x);
PUSH(x);
goto fast_next_opcode;
case STORE_FAST:
v = POP();
SETLOCAL(oparg, v);
goto fast_next_opcode;
case POP_TOP: case POP_TOP:
v = POP(); v = POP();
Py_DECREF(v); Py_DECREF(v);
continue; goto fast_next_opcode;
case ROT_TWO: case ROT_TWO:
v = POP(); v = POP();
@ -1617,12 +1661,6 @@ eval_frame(PyFrameObject *f)
PyExc_NameError, GLOBAL_NAME_ERROR_MSG, w); PyExc_NameError, GLOBAL_NAME_ERROR_MSG, w);
break; break;
case LOAD_CONST:
x = GETCONST(oparg);
Py_INCREF(x);
PUSH(x);
break;
case LOAD_NAME: case LOAD_NAME:
w = GETNAMEV(oparg); w = GETNAMEV(oparg);
if ((x = f->f_locals) == NULL) { if ((x = f->f_locals) == NULL) {
@ -1664,23 +1702,6 @@ eval_frame(PyFrameObject *f)
PUSH(x); PUSH(x);
break; break;
case LOAD_FAST:
x = GETLOCAL(oparg);
if (x != NULL) {
Py_INCREF(x);
PUSH(x);
continue;
}
format_exc_check_arg(PyExc_UnboundLocalError,
UNBOUNDLOCAL_ERROR_MSG,
PyTuple_GetItem(co->co_varnames, oparg));
break;
case STORE_FAST:
v = POP();
SETLOCAL(oparg, v);
continue;
case DELETE_FAST: case DELETE_FAST:
x = GETLOCAL(oparg); x = GETLOCAL(oparg);
if (x == NULL) { if (x == NULL) {
@ -1949,26 +1970,6 @@ eval_frame(PyFrameObject *f)
STACK_LEVEL()); STACK_LEVEL());
continue; continue;
case SET_LINENO:
#ifdef LLTRACE
if (lltrace)
printf("--- %s:%d \n", filename, oparg);
#endif
f->f_lineno = oparg;
if (tstate->c_tracefunc == NULL || tstate->tracing)
continue;
/* Trace each line of code reached */
f->f_lasti = INSTR_OFFSET();
/* Inline call_trace() for performance: */
tstate->tracing++;
tstate->use_tracing = 0;
err = (tstate->c_tracefunc)(tstate->c_traceobj, f,
PyTrace_LINE, Py_None);
tstate->use_tracing = (tstate->c_tracefunc
|| tstate->c_profilefunc);
tstate->tracing--;
break;
case CALL_FUNCTION: case CALL_FUNCTION:
{ {
int na = oparg & 0xff; int na = oparg & 0xff;