[Bug target/79799] Improve vec_insert of float on Power9

[meissner at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79799

--- Comment #1 from Michael Meissner <meissner at gcc dot gnu.org> ---
Author: meissner
Date: Tue Jun 20 06:26:27 2017
New Revision: 249395

URL: https://gcc.gnu.org/viewcvs?rev=249395&root=gcc&view=rev
Log:
[gcc]
2017-06-20  Michael Meissner  <meiss...@linux.vnet.ibm.com>

        PR target/79799
        * config/rs6000/rs6000.c (rs6000_expand_vector_init): Add support
        for doing vector set of SFmode on ISA 3.0.
        * config/rs6000/vsx.md (vsx_set_v4sf_p9): Likewise.
        (vsx_set_v4sf_p9_zero): Special case setting 0.0f to a V4SF
        element.
        (vsx_insert_extract_v4sf_p9): Add an optimization for inserting a
        SFmode value into a V4SF variable that was extracted from another
        V4SF variable without converting the element to double precision
        and back to single precision vector format.
        (vsx_insert_extract_v4sf_p9_2): Likewise.

[gcc/testsuite]
2017-06-20  Michael Meissner  <meiss...@linux.vnet.ibm.com>

        PR target/79799
        * gcc.target/powerpc/pr79799-1.c: New test.
        * gcc.target/powerpc/pr79799-2.c: Likewise.
        * gcc.target/powerpc/pr79799-3.c: Likewise.
        * gcc.target/powerpc/pr79799-4.c: Likewise.
        * gcc.target/powerpc/pr79799-5.c: Likewise.


Added:
    trunk/gcc/testsuite/gcc.target/powerpc/pr79799-1.c
    trunk/gcc/testsuite/gcc.target/powerpc/pr79799-2.c
    trunk/gcc/testsuite/gcc.target/powerpc/pr79799-3.c
    trunk/gcc/testsuite/gcc.target/powerpc/pr79799-4.c
    trunk/gcc/testsuite/gcc.target/powerpc/pr79799-5.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/rs6000/rs6000.c
    trunk/gcc/config/rs6000/vsx.md
    trunk/gcc/testsuite/ChangeLog