[Bug middle-end/124637] [13/14/15/16 Regression] powerpc64: invalid code while passing a struct via register

[roger at nextmovesoftware dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=124637

Roger Sayle <roger at nextmovesoftware dot com> changed:

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                 CC|                            |roger at nextmovesoftware dot com

--- Comment #11 from Roger Sayle <roger at nextmovesoftware dot com> ---
Created attachment 64065
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=64065&action=edit
proposed patch

Here's my guess at a patch.  Unfortunately, the only targets I can thoroughly
test are little-endian, so although this patch appears to improve/change code
generation on a cross-compiler to powerpc64-linux-gnu, testing beyond that is
minimal.  If someone could confirm that this fixes things on real hardware (or
a simulator) that would be great, then the next step would be to check that it
doesn't cause problems on other big-endian targets.