5650688e72
When expanding a MOVW (16-bit copy) to two MOVs (8-bit copy), the lower byte always comes first. This is incorrect for corner cases like '$r24r23 -> $r25r24', in which the higher byte copy should come first. Current patch fixes that bug as recorded at https://github.com/rust-lang/rust/issues/98167 Reviewed By: benshi001 Differential Revision: https://reviews.llvm.org/D128588