Hojun-Cho
a4a4cd7c16
The arg-drain loop checked node_isfloat before popping a widened arg's GP words, so a float arg adjacent to a widened (tagged) arg read the wrong stack slot: the f64 took the widened payload (#30), or the float arm ate the tag word into X0 and the payload landed in DI as the tag (#48). One missing branch, two manifestations — mirror cstage's widen-first pop (cgen.c:9650-9665). Review items #30+#48 (fold reviewer-verified one-mechanism against the cstage twin).