Inline with-suppress return blocks and extend return duplication by youknowone · Pull Request #7622 · RustPython/RustPython

- Add inline_with_suppress_return_blocks pass to inline return
  epilogues after with-suppress cleanup sequences
- Extend duplicate_end_returns to handle conditional jumps to the
  final return block, not just unconditional ones
- Process jump targets in reverse order to preserve indices
- Add extra deoptimize_store_fast_store_fast pass after superinstructions
- Add tests for listcomp cleanup tail and with-suppress tail

- Remove unnecessary NOP between FOR_ITER and unpack/store
  by compiling loop target directly on target range
- Fix t-string compilation to match stack order: build
  strings tuple first, then evaluate interpolations
- Split compile_tstring_into into collect_tstring_strings
  and compile_tstring_interpolations
- Handle debug text literals and default repr conversion
  for debug specifier in t-strings
- Always set bit 1 in BUILD_INTERPOLATION oparg encoding

Constant folding:
- Add string/bytes multiply and bytes concat folding in IR
- Add constant subscript folding (str, bytes, tuple indexing)
- Delegate list/set constant folding to IR passes
- Stream big non-const list/set via BUILD+LIST_APPEND

Class/generic compilation:
- Reorder class body prologue: __type_params__ before __classdict__
- Build class function before .generic_base in generic classes
- Register .type_params/.generic_base symbols in proper scopes
- Use load_name/store_name helpers for synthetic variables

Return block handling:
- Only duplicate return-None epilogues, not arbitrary returns
- Add inline_pop_except_return_blocks pass
- Add duplicate_named_except_cleanup_returns pass

Other fixes:
- Fix eliminate_dead_stores to only collapse adjacent duplicates
- Skip STORE_FAST_LOAD_FAST superinstruction in generators after FOR_ITER
- Thread jumps through NOP-only blocks
- Transfer NOP line info to following unconditional jumps
- Extract scope_needs_conditional_annotations_cell helper
- Register __conditional_annotations__ for module future annotations

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