[Bug target/83862] powerpc: ICE in signbit testcase

[meissner at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83862

--- Comment #2 from Michael Meissner <meissner at gcc dot gnu.org> ---
Author: meissner
Date: Mon Jan 22 19:36:18 2018
New Revision: 256959

URL: https://gcc.gnu.org/viewcvs?rev=256959&root=gcc&view=rev
Log:
[gcc]
2018-01-22  Michael Meissner  <meissner@linux.vnet.ibm.com>

        PR target/83862
        * config/rs6000/rs6000-protos.h (rs6000_split_signbit): Delete,
        no longer used.
        * config/rs6000/rs6000.c (rs6000_split_signbit): Likewise.
        * config/rs6000/rs6000.md (signbit<mode>2): Change code for IEEE
        128-bit to produce an UNSPEC move to get the double word with the
        signbit and then a shift directly to do signbit.
        (signbit<mode>2_dm): Replace old IEEE 128-bit signbit
        implementation with a new version that just does either a direct
        move or a regular move.  Move memory interface to separate insns.
        Move insns so they are next to the expander.
        (signbit<mode>2_dm_mem_be): New combiner insns to combine load
        with signbit move.  Split big and little endian case.
        (signbit<mode>2_dm_mem_le): Likewise.
        (signbit<mode>2_dm_<su>ext): Delete, no longer used.
        (signbit<mode>2_dm2): Likewise.

[gcc/testsuite]
2018-01-22  Michael Meissner  <meissner@linux.vnet.ibm.com>

        PR target/83862
        * gcc.target/powerpc/pr83862.c: New test.


Added:
    trunk/gcc/testsuite/gcc.target/powerpc/pr83862.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/rs6000/rs6000-protos.h
    trunk/gcc/config/rs6000/rs6000.c
    trunk/gcc/config/rs6000/rs6000.md
    trunk/gcc/testsuite/ChangeLog