[PATCH 0/1] MR10921: Draft: vbscript: Fast-path interp_add and var_cmp for pure-integer operands.

[Francis De Brabandere (＠francisdb)]

For-loop counters and conditional comparisons hit VarAdd/VarCmp every
iteration with trivial I2/I4 operands, but the full VARIANT conversion
pipeline (VariantChangeType, locale grab/free in ucrtbase) dominates the
cost. Short-circuit at the call site in interp.c when both operands are
pure VT_I2/VT_I4: compare directly, or add via LONGLONG with native
promotion (I2+I2 -> I4 on overflow, I4+I4 -> R8 on overflow).

Alternative to !10528 
Keeps the optimisation scoped to vbscript callers rather than adding
branches to oleaut32 generic VarAdd/VarCmp.

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https://gitlab.winehq.org/wine/wine/-/merge_requests/10921