- Add function name prefix to basic block labels to avoid cross-function conflicts
- blocks.rs: create_basic_blocks now takes fn_label parameter
- Format: 'Main_join_2_bb23' instead of just 'bb23'
- Add conservative fallback for missing terminators (jump to next or entry)
- This fixes 'Basic Block does not have terminator' verification error
Analysis insights:
- MIR output was correct (all blocks had terminators)
- Problem was LLVM-side block name collision between functions
- Classic case of 'Rust complexity' - simple C++ style fix works best
- Sometimes the simplest solution is the right one\!
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