[Bug rtl-optimization/64010] [msp430-elf] struct function dereference clobbers parameter passed to function

[pab at pabigot dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64010

--- Comment #7 from Peter A. Bigot <pab at pabigot dot com> ---
I don't know if https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64160 is related;
it appears to be a similar problem affecting a value returned in multiple
registers.  It's present both before and after the alternative patch was
applied (now that the code that reset the target has been fixed).