[PATCH 0/1] MR10528: oleaut32: Add fast paths for VarAdd and VarCmp with integer operands.

[Francis De Brabandere (＠francisdb)]

Skip the expensive VariantChangeType/VariantCopyInd machinery when both
operands are simple integer types (VT_I2, VT_I4, VT_EMPTY). For VarAdd,
handle overflow promotion (I2+I2 that overflows to I4, I4+I4 that
overflows to R8) matching native Windows behavior. For VarCmp, compare
via LONGLONG to handle mixed I2/I4 correctly.

This eliminates the dominant cost in VBScript For-loop step/compare
operations, where VarAdd and VarCmp are called every iteration with
trivial I2 operands but previously went through the full VARIANT
conversion pipeline including locale allocation in ucrtbase.

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https://gitlab.winehq.org/wine/wine/-/merge_requests/10528