mirrors/cpython
1
0
Fork 0
mirror of https://github.com/python/cpython.git synced 2025-08-23 10:16:01 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 11

bpo-47120: make POP_JUMP_IF_TRUE/FALSE/NONE/NOT_NONE relative (GH-32400)

Browse source
This commit is contained in:
Irit Katriel 2022-04-11 10:40:24 +01:00 • committed by GitHub
parent 98ff4a6877
commit dd207a6ac5
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
14 changed files with 357 additions and 135 deletions
Download patch file Download diff file Expand all files Collapse all files

14
Python/specialize.c
View file

@ -1883,7 +1883,10 @@ _Py_Specialize_CompareOp(PyObject *lhs, PyObject *rhs, _Py_CODEUNIT *instr,
assert(_PyOpcode_Caches[COMPARE_OP] == INLINE_CACHE_ENTRIES_COMPARE_OP);
_PyCompareOpCache *cache = (_PyCompareOpCache *)(instr + 1);
int next_opcode = _Py_OPCODE(instr[INLINE_CACHE_ENTRIES_COMPARE_OP + 1]);
if (next_opcode != POP_JUMP_IF_FALSE && next_opcode != POP_JUMP_IF_TRUE) {
if (next_opcode != POP_JUMP_FORWARD_IF_FALSE &&
next_opcode != POP_JUMP_BACKWARD_IF_FALSE &&
next_opcode != POP_JUMP_FORWARD_IF_TRUE &&
next_opcode != POP_JUMP_BACKWARD_IF_TRUE) {
// Can't ever combine, so don't don't bother being adaptive (unless
// we're collecting stats, where it's more important to get accurate hit
// counts for the unadaptive version and each of the different failure
@ -1901,9 +1904,14 @@ _Py_Specialize_CompareOp(PyObject *lhs, PyObject *rhs, _Py_CODEUNIT *instr,
}
assert(oparg <= Py_GE);
int when_to_jump_mask = compare_masks[oparg];
if (next_opcode == POP_JUMP_IF_FALSE) {
if (next_opcode == POP_JUMP_FORWARD_IF_FALSE ||
next_opcode == POP_JUMP_BACKWARD_IF_FALSE) {
when_to_jump_mask = (1 | 2 | 4) & ~when_to_jump_mask;
}
if (next_opcode == POP_JUMP_BACKWARD_IF_TRUE ||
next_opcode == POP_JUMP_BACKWARD_IF_FALSE) {
when_to_jump_mask <<= 3;
}
if (Py_TYPE(lhs) != Py_TYPE(rhs)) {
SPECIALIZATION_FAIL(COMPARE_OP, compare_op_fail_kind(lhs, rhs));
goto failure;
@ -1931,7 +1939,7 @@ _Py_Specialize_CompareOp(PyObject *lhs, PyObject *rhs, _Py_CODEUNIT *instr,
}
else {
_Py_SET_OPCODE(*instr, COMPARE_OP_STR_JUMP);
cache->mask = (when_to_jump_mask & 2) == 0;
cache->mask = when_to_jump_mask;
goto success;
}
}