[Bug target/71873] ICE in push_reload

["saaadhu at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71873

--- Comment #1 from Senthil Kumar Selvaraj <saaadhu at gcc dot gnu.org> ---
Author: saaadhu
Date: Wed Aug 10 12:35:57 2016
New Revision: 239321

URL: https://gcc.gnu.org/viewcvs?rev=239321&root=gcc&view=rev
Log:
Fix PR 71873 - ICE in push_reload

Extend computation of subreg_in_class to constants and plus expressions 
inside SUBREGs, before recursively calling push_reload. SYMBOL_REFs are
also CONSTANT_P, so remove explicit handling of SYMBOL_REFs.

gcc/ChangeLog

        PR target/71873
        * reload.c (push_reload): Compute subreg_in_class for
        subregs of constants and plus expressions. Remove special
        handling of SYMBOL_REFs.

gcc/testsuite/ChangeLog

        PR target/71873
        * gcc.target/avr/pr71873.c: New test.

Added:
    trunk/gcc/testsuite/gcc.target/avr/pr71873.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/reload.c
    trunk/gcc/testsuite/ChangeLog