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gh-104584: Change DEOPT_IF in uops executor (#106146)

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This effectively reverts bb578a0, restoring the original DEOPT_IF() macro in ceval_macros.h, and redefining it in the Tier 2 interpreter. We can get rid of the PREDICTED() macros there as well!
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Guido van Rossum 2023-06-27 14:17:41 -07:00 • committed by GitHub
parent 5290881009
commit 6b5166fb12
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2 changed files with 7 additions and 12 deletions
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16
Python/ceval.c
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@ -2767,10 +2767,11 @@ void Py_LeaveRecursiveCall(void)
///////////////////// Experimental UOp Interpreter /////////////////////
// UPDATE_MISS_STATS (called by DEOPT_IF) uses next_instr
// TODO: Make it do something useful
#undef UPDATE_MISS_STATS
#define UPDATE_MISS_STATS(INSTNAME) ((void)0)
#undef DEOPT_IF
#define DEOPT_IF(COND, INSTNAME) \
if ((COND)) { \
goto deoptimize; \
}
_PyInterpreterFrame *
_PyUopExecute(_PyExecutorObject *executor, _PyInterpreterFrame *frame, PyObject **stack_pointer)
@ -2875,12 +2876,7 @@ error:
Py_DECREF(self);
return NULL;
PREDICTED(UNPACK_SEQUENCE)
PREDICTED(COMPARE_OP)
PREDICTED(LOAD_SUPER_ATTR)
PREDICTED(STORE_SUBSCR)
PREDICTED(BINARY_SUBSCR)
PREDICTED(BINARY_OP)
deoptimize:
// On DEOPT_IF we just repeat the last instruction.
// This presumes nothing was popped from the stack (nor pushed).
#ifdef LLTRACE

3
Python/ceval_macros.h
View file

@ -264,12 +264,11 @@ GETITEM(PyObject *v, Py_ssize_t i) {
#define UPDATE_MISS_STATS(INSTNAME) ((void)0)
#endif
// NOTE: in the uops version, opcode may be > 255
#define DEOPT_IF(COND, INSTNAME) \
if ((COND)) { \
/* This is only a single jump on release builds! */ \
UPDATE_MISS_STATS((INSTNAME)); \
assert(opcode >= 256 || _PyOpcode_Deopt[opcode] == (INSTNAME)); \
assert(_PyOpcode_Deopt[opcode] == (INSTNAME)); \
GO_TO_INSTRUCTION(INSTNAME); \
}