bugc: add runtime call stack for recursion support#201
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gnidan merged 1 commit intocall-returnfrom Apr 2, 2026
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Implement FMP-based call frames so functions can call themselves recursively. Each call allocates a frame (saved FP, saved return PC, locals) from the free memory pointer; returns deallocate by restoring FP and FMP. Also fixes pre-existing SUB/DIV/MOD operand ordering bug where non-commutative operations computed right op left instead of left op right.
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