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Bytecode parity #7504

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Merged
youknowone merged 15 commits into from
Mar 25, 2026
Merged

Bytecode parity #7504

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a6aab76
Match CPython LOAD_SPECIAL stack semantics for with/async-with
youknowone Mar 23, 2026
d015f02
Normalize LOAD_FAST_CHECK and JUMP_BACKWARD_NO_INTERRUPT
youknowone Mar 23, 2026
37d1e03
Add EXTENDED_ARG to SKIP_OPS, normalize LOAD_FAST_CHECK and JUMP_BACK…
youknowone Mar 23, 2026
b559a6e
Remove duplicate return-None when block already has return
youknowone Mar 23, 2026
6b200d9
Improve __static_attributes__ collection accuracy
youknowone Mar 23, 2026
122f76a
Use method mode for function-local import attribute calls
youknowone Mar 25, 2026
d1641dd
Optimize constant iterable before GET_ITER to LOAD_CONST tuple
youknowone Mar 25, 2026
5b19b70
Fix cell variable ordering: parameters first, then alphabetical
youknowone Mar 25, 2026
5b32c68
Emit COPY_FREE_VARS before MAKE_CELL matching CPython order
youknowone Mar 25, 2026
96462fa
Fix RESUME AfterYield encoding to match CPython 3.14 (value 5)
youknowone Mar 25, 2026
296eaa1
Address code review feedback from #7481
youknowone Mar 25, 2026
b2eaa71
Fold constant list/set/tuple literals in compiler
youknowone Mar 23, 2026
c7f505d
Use BUILD_MAP 0 + MAP_ADD for large dicts (>= 16 pairs)
youknowone Mar 23, 2026
a23315a
Fix clippy warnings and cargo fmt
youknowone Mar 25, 2026
cab59e7
fix surrogate
youknowone Mar 25, 2026
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Use BUILD_MAP 0 + MAP_ADD for large dicts (>= 16 pairs) 
Match CPython's compiler behavior: dicts with 16+ key-value pairs
use BUILD_MAP 0 followed by MAP_ADD for each pair, instead of
pushing all keys/values on the stack and calling BUILD_MAP N.
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@youknowone
youknowone committed Mar 25, 2026
commit c7f505d77877131577ab40a6f9f56254f321374d
9 changes: 2 additions & 7 deletions crates/codegen/src/compile.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -723,9 +723,7 @@ impl Compiler {
// Function-local imports use method mode (scope is Local)
return !matches!(
current.typ,
CompilerScope::Function
| CompilerScope::AsyncFunction
| CompilerScope::Lambda
CompilerScope::Function | CompilerScope::AsyncFunction | CompilerScope::Lambda
);
}
if sym.scope == SymbolScope::Local {
Expand Down Expand Up @@ -7046,10 +7044,7 @@ impl Compiler {
let has_unpacking = items.iter().any(|item| item.key.is_none());

if !has_unpacking {
// STACK_USE_GUIDELINE: for large dicts (16+ pairs), use
// BUILD_MAP 0 + MAP_ADD to avoid excessive stack usage
let big = items.len() * 2 > 30; // ~15 pairs threshold
if big {
if items.len() >= 16 {
emit!(self, Instruction::BuildMap { count: 0 });
for item in items {
self.compile_expression(item.key.as_ref().unwrap())?;
Expand Down