[DAG] getTruncatedUSUBSAT - always truncate operands. NFCI.

As noticed on D96703, we're always truncating the operands so should use getNode(ISD::TRUNCATE) instead of getZExtOrTrunc.

GitOrigin-RevId: 53e83afcaf5ce00073348af847603b2fd6442c81
1 file changed