[Bug target/57949] [powerpc64] Structure parameter alignment issue with vector extensions

[wschmidt at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57949

Bill Schmidt <wschmidt at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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                 CC|                            |joseph at codesourcery dot com

--- Comment #5 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
Joseph, adding you for any comments you might have relative to Freescale
impacts.

Summarizing some offline discussion:
 * This would apply to long double, __int128, and (probably) _Decimal128 as
well.  The fix is the same in all cases.
 * There may be some oddities for _Decimal128, as the need to be in even/odd
register pairs may conflict with alignment in storage.  The 64-bit ABI does not
currently specify the alignment for _Decimal128 so we'll need to check the code
to see what's the case in practice.