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gh-89189: More compact range iterator (GH-27986)

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Serhiy Storchaka 2022-11-30 23:04:30 +02:00 • committed by GitHub
parent 9628136fac
commit 787764219f
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GPG key ID: 4AEE18F83AFDEB23
7 changed files with 88 additions and 50 deletions
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7
Python/bytecodes.c
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@ -2620,14 +2620,15 @@ dummy_func(
STAT_INC(FOR_ITER, hit);
_Py_CODEUNIT next = next_instr[INLINE_CACHE_ENTRIES_FOR_ITER];
assert(_PyOpcode_Deopt[_Py_OPCODE(next)] == STORE_FAST);
if (r->index >= r->len) {
if (r->len <= 0) {
STACK_SHRINK(1);
Py_DECREF(r);
JUMPBY(INLINE_CACHE_ENTRIES_FOR_ITER + oparg + 1);
}
else {
long value = (long)(r->start +
(unsigned long)(r->index++) * r->step);
long value = r->start;
r->start = value + r->step;
r->len--;
if (_PyLong_AssignValue(&GETLOCAL(_Py_OPARG(next)), value) < 0) {
goto error;
}

7
Python/generated_cases.c.h generated
View file

@ -2638,14 +2638,15 @@
STAT_INC(FOR_ITER, hit);
_Py_CODEUNIT next = next_instr[INLINE_CACHE_ENTRIES_FOR_ITER];
assert(_PyOpcode_Deopt[_Py_OPCODE(next)] == STORE_FAST);
if (r->index >= r->len) {
if (r->len <= 0) {
STACK_SHRINK(1);
Py_DECREF(r);
JUMPBY(INLINE_CACHE_ENTRIES_FOR_ITER + oparg + 1);
}
else {
long value = (long)(r->start +
(unsigned long)(r->index++) * r->step);
long value = r->start;
r->start = value + r->step;
r->len--;
if (_PyLong_AssignValue(&GETLOCAL(_Py_OPARG(next)), value) < 0) {
goto error;
}