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GH-128914: Remove all but one conditional stack effects (GH-129226)

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* Remove all 'if (0)' and 'if (1)' conditional stack effects

* Use array instead of conditional for BUILD_SLICE args

* Refactor LOAD_GLOBAL to use a common conditional uop

* Remove conditional stack effects from LOAD_ATTR specializations

* Replace conditional stack effects in LOAD_ATTR with a 0 or 1 sized array.

* Remove conditional stack effects from CALL_FUNCTION_EX
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Mark Shannon 2025-01-27 16:24:48 +00:00 • committed by GitHub
parent 8ec76d9034
commit 75b4962157
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GPG key ID: B5690EEEBB952194
19 changed files with 518 additions and 758 deletions
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Python/optimizer.c
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@ -1276,15 +1276,16 @@ uop_optimize(
int oparg = buffer[pc].oparg;
if (_PyUop_Flags[opcode] & HAS_OPARG_AND_1_FLAG) {
buffer[pc].opcode = opcode + 1 + (oparg & 1);
assert(strncmp(_PyOpcode_uop_name[buffer[pc].opcode], _PyOpcode_uop_name[opcode], strlen(_PyOpcode_uop_name[opcode])) == 0);
}
else if (oparg < _PyUop_Replication[opcode]) {
buffer[pc].opcode = opcode + oparg + 1;
assert(strncmp(_PyOpcode_uop_name[buffer[pc].opcode], _PyOpcode_uop_name[opcode], strlen(_PyOpcode_uop_name[opcode])) == 0);
}
else if (is_terminator(&buffer[pc])) {
break;
}
assert(_PyOpcode_uop_name[buffer[pc].opcode]);
assert(strncmp(_PyOpcode_uop_name[buffer[pc].opcode], _PyOpcode_uop_name[opcode], strlen(_PyOpcode_uop_name[opcode])) == 0);
}
OPT_HIST(effective_trace_length(buffer, length), optimized_trace_length_hist);
length = prepare_for_execution(buffer, length);