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gh-126835: Set location for noped out instructions after constant folding in CFG. #130109

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Merged
merged 4 commits into from
Feb 14, 2025
Merged

gh-126835: Set location for noped out instructions after constant folding in CFG. #130109

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ef68aaa
set location for noped out instructions after optimizations
WolframAlph Feb 14, 2025
0f95636
use NO_LOCATION
WolframAlph Feb 14, 2025
bdae73b
update tests
WolframAlph Feb 14, 2025
cdf427a
set location for BUILD_SET/BUILD_LIST
WolframAlph Feb 14, 2025
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use NO_LOCATION
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@WolframAlph
WolframAlph committed Feb 14, 2025
commit 0f95636ca4bb33c5102c885621d8514a9df27c94
14 changes: 6 additions & 8 deletions Python/flowgraph.c
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Original file line number Diff line number Diff line change
Expand Up @@ -1388,10 +1388,10 @@ get_constant_sequence(basicblock *bb, int start, int size,

/*
Walk basic block backwards starting from "start" and change "count" number of
non-NOP instructions to NOP's and set their i_loc info to "location" if provided.
non-NOP instructions to NOP's and set their location to NO_LOCATION.
*/
static void
nop_out(basicblock *bb, int start, int count, _Py_SourceLocation *location)
nop_out(basicblock *bb, int start, int count)
{
assert(start < bb->b_iused);
for (; count > 0; start--) {
Expand All @@ -1401,9 +1401,7 @@ nop_out(basicblock *bb, int start, int count, _Py_SourceLocation *location)
continue;
}
INSTR_SET_OP0(instr, NOP);
if (location != NULL) {
INSTR_SET_LOC(instr, *location);
}
INSTR_SET_LOC(instr, NO_LOCATION);
count--;
}
}
Expand Down Expand Up @@ -1432,7 +1430,7 @@ fold_tuple_of_constants(basicblock *bb, int n, PyObject *consts, PyObject *const
assert(PyTuple_CheckExact(newconst) && PyTuple_GET_SIZE(newconst) == seq_size);
int index = add_const(newconst, consts, const_cache);
RETURN_IF_ERROR(index);
nop_out(bb, n-1, seq_size, &instr->i_loc);
nop_out(bb, n-1, seq_size);
INSTR_SET_OP1(instr, LOAD_CONST, index);
return SUCCESS;
}
Expand Down Expand Up @@ -1482,7 +1480,7 @@ optimize_lists_and_sets(basicblock *bb, int i, int nextop,
}
int index = add_const(newconst, consts, const_cache);
RETURN_IF_ERROR(index);
nop_out(bb, i-1, seq_size, &instr->i_loc);
nop_out(bb, i-1, seq_size);
if (contains_or_iter) {
INSTR_SET_OP1(instr, LOAD_CONST, index);
}
Expand Down Expand Up @@ -1545,7 +1543,7 @@ optimize_if_const_binop(basicblock *bb, int i, PyObject *consts, PyObject *const
}
int newopcode, newoparg;
RETURN_IF_ERROR(newop_from_folded(newconst, consts, const_cache, &newopcode, &newoparg));
nop_out(bb, i-1, 2, &binop->i_loc);
nop_out(bb, i-1, 2);
INSTR_SET_OP1(binop, newopcode, newoparg);
return SUCCESS;
}
Expand Down
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