[Bug target/86197] POWERPC: float128 parameter passing

[segher at gcc dot gnu.org]

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

--- Comment #4 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Author: segher
Date: Mon Jun 25 11:31:45 2018
New Revision: 262010

URL: https://gcc.gnu.org/viewcvs?rev=262010&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.


        Backport from trunk
        2018-06-19  Segher Boessenkool  <segher@kernel.crashing.org>

        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:
    branches/gcc-8-branch/gcc/ChangeLog
    branches/gcc-8-branch/gcc/config/rs6000/rs6000.c