[Bug target/84711] AArch32 big-endian fails when taking subreg of a vector mode to a scalar mode.

[tnfchris at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84711

--- Comment #12 from Tamar Christina <tnfchris at gcc dot gnu.org> ---
Author: tnfchris
Date: Thu Jul  5 10:35:00 2018
New Revision: 262435

URL: https://gcc.gnu.org/viewcvs?rev=262435&root=gcc&view=rev
Log:
Correct subreg no-op handling for big-endian vec_select.

gcc/

        PR target/84711
        * rtlanal.c (set_noop_p): Constrain on mode change,
        include hard-reg-set.h

gcc/testuite/

        PR target/84711
        * gcc.dg/vect/pr84711.c: New.


Added:
    trunk/gcc/testsuite/gcc.dg/vect/pr84711.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/rtlanal.c
    trunk/gcc/testsuite/ChangeLog