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GH-105229: Remove remaining two-codeunit superinstructions #105326

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Merged
merged 3 commits into from
Jun 8, 2023
Merged

GH-105229: Remove remaining two-codeunit superinstructions #105326

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6cde1a4
Remove LOAD_CONST__LOAD_FAST and LOAD_FAST__LOAD_CONST superinstructi…
markshannon Jun 2, 2023
a6964a2
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markshannon Jun 3, 2023
d92c4f7
Merge branch 'main' into remove-remaining-superinstructions
markshannon Jun 5, 2023
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24 changes: 12 additions & 12 deletions Include/internal/pycore_opcode.h
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5 changes: 0 additions & 5 deletions Include/internal/pycore_opcode_utils.h
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Original file line number Diff line number Diff line change
Expand Up @@ -55,11 +55,6 @@ extern "C" {
(opcode) == RAISE_VARARGS || \
(opcode) == RERAISE)

#define IS_SUPERINSTRUCTION_OPCODE(opcode) \
((opcode) == LOAD_FAST__LOAD_CONST || \
(opcode) == LOAD_CONST__LOAD_FAST)


#define LOG_BITS_PER_INT 5
#define MASK_LOW_LOG_BITS 31

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24 changes: 11 additions & 13 deletions Include/opcode.h
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6 changes: 0 additions & 6 deletions Lib/opcode.py
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Expand Up @@ -409,12 +409,6 @@ def pseudo_op(name, op, real_ops):
"LOAD_ATTR_METHOD_NO_DICT",
"LOAD_ATTR_METHOD_WITH_VALUES",
],
"LOAD_CONST": [
"LOAD_CONST__LOAD_FAST",
],
"LOAD_FAST": [
"LOAD_FAST__LOAD_CONST",
],
"LOAD_GLOBAL": [
"LOAD_GLOBAL_BUILTIN",
"LOAD_GLOBAL_MODULE",
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3 changes: 3 additions & 0 deletions Misc/NEWS.d/next/Core and Builtins/2023-06-03-04-28-28.gh-issue-105229.stEmfp.rst
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@@ -0,0 +1,3 @@
Remove remaining two-codeunit superinstructions. All remaining
superinstructions only take a single codeunit, simplifying instrumentation
and quickening.
3 changes: 0 additions & 3 deletions Python/bytecodes.c
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Expand Up @@ -234,9 +234,6 @@ dummy_func(
SETLOCAL(oparg2, value2);
}

super(LOAD_FAST__LOAD_CONST) = LOAD_FAST + LOAD_CONST;
super(LOAD_CONST__LOAD_FAST) = LOAD_CONST + LOAD_FAST;

inst(POP_TOP, (value --)) {
DECREF_INPUTS();
}
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2 changes: 0 additions & 2 deletions Python/flowgraph.c
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Expand Up @@ -1663,7 +1663,6 @@ scan_block_for_locals(basicblock *b, basicblock ***sp)
for (int i = 0; i < b->b_iused; i++) {
cfg_instr *instr = &b->b_instr[i];
assert(instr->i_opcode != EXTENDED_ARG);
assert(!IS_SUPERINSTRUCTION_OPCODE(instr->i_opcode));
if (instr->i_except != NULL) {
maybe_push(instr->i_except, unsafe_mask, sp);
}
Expand Down Expand Up @@ -1722,7 +1721,6 @@ fast_scan_many_locals(basicblock *entryblock, int nlocals)
for (int i = 0; i < b->b_iused; i++) {
cfg_instr *instr = &b->b_instr[i];
assert(instr->i_opcode != EXTENDED_ARG);
assert(!IS_SUPERINSTRUCTION_OPCODE(instr->i_opcode));
int arg = instr->i_oparg;
if (arg < 64) {
continue;
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