[Bug target/86197] POWERPC: float128 parameter passing

[segher at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86197

--- Comment #3 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Author: segher
Date: Tue Jun 19 10:52:39 2018
New Revision: 261738

URL: https://gcc.gnu.org/viewcvs?rev=261738&root=gcc&view=rev
Log:
rs6000: Fix vector homogeneous aggregates (PR86197)

The existing code allows only 4 vectors worth of ieee128 homogeneous
aggregates, but it should be 8.  This happens because at one spot it
is mistakenly qualified as being passed in floating point registers.


        PR target/86197
        * config/rs6000/rs6000.md (rs6000_discover_homogeneous_aggregate): An
        ieee128 argument takes up only one (vector) register, not two (floating
        point) registers.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/rs6000/rs6000.c