Hojun-Cho
734c0c36e5
Per-row: cstage build+run exit assert AND w6c vs w6c_ww .s cmp.
Three scalar-pair single-var bug-rows — (f64,i64), (i64,f64) order-swap,
(i64,i64) all-integer — each diverge on master 60c3e51 by one dropped
MOVQ DX and are byte-identical after the fix. The all-integer row proves
the fix is not f64-gated. Two control rows stay byte-id pre- and
post-fix: the destructure form `let (a,b) = mk()` (cgmlet + tupstore
cursor, the path bootstrap/990-997 rely on) and a 32B str-element
single-var tuple (excluded by the fix's sz==16 gate). Modelled on
953_f64crossmod_run. Master gate: 3 bug rows FAIL, 2 controls clean.