[Bug target/72802] powerpc64le: -mcpu=power9 emits lxssp instruction with offset that isn't a multiple of 4

[amodra at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=72802

--- Comment #8 from Alan Modra <amodra at gcc dot gnu.org> ---
Author: amodra
Date: Tue Aug  9 05:43:29 2016
New Revision: 239269

URL: https://gcc.gnu.org/viewcvs?rev=239269&root=gcc&view=rev
Log:
[RS6000] PR72802 part 1, fix constraints for lxssp/stxssp

        PR target/72802
        * config/rs6000/rs6000.c (mem_operand_gpr): Remove vsx dform test.
        (mem_operand_ds_form): New predicate.
        * config/rs6000/rs6000-protos.h (mem_operand_ds_form): Declare.
        * config/rs6000/constraints.md (wY): New constraint.
        * config/rs6000/rs6000.md (f32_lm2, f32_sm2): Use wY for SF.
        (extendsfdf2_fpr): Replace o constraint with wY.

Modified:
    branches/gcc-6-branch/gcc/ChangeLog
    branches/gcc-6-branch/gcc/config/rs6000/constraints.md
    branches/gcc-6-branch/gcc/config/rs6000/rs6000-protos.h
    branches/gcc-6-branch/gcc/config/rs6000/rs6000.c
    branches/gcc-6-branch/gcc/config/rs6000/rs6000.md