[Bug tree-optimization/69802] [4.9/5/6 Regression] gcc ICE at -O1 and above on valid code on x86_64-linux-gnu with “seg fault”

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69802

--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Tue Feb 16 09:12:37 2016
New Revision: 233446

URL: https://gcc.gnu.org/viewcvs?rev=233446&root=gcc&view=rev
Log:
        PR tree-optimization/69802
        * tree-ssa-reassoc.c (update_range_test): If op is
        SSA_NAME_IS_DEFAULT_DEF, give up unless tem is a positive
        op == 1 test of precision 1 integral op, otherwise handle
        that case as op itself.  Fix up formatting.
        (optimize_range_tests_to_bit_test, optimize_range_tests): Fix
        up formatting.

        * gcc.dg/pr69802.c: New test.

Added:
    trunk/gcc/testsuite/gcc.dg/pr69802.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-reassoc.c