[Bug rtl-optimization/69592] [6 Regression] Compile-time and memory-use hog in combine

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69592

--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Mon Feb  1 22:39:31 2016
New Revision: 233059

URL: https://gcc.gnu.org/viewcvs?rev=233059&root=gcc&view=rev
Log:
        PR rtl-optimization/69592
        * rtlanal.c (nonzero_bits_binary_arith_p): New inline function.
        (cached_nonzero_bits): Use it instead of ARITHMETIC_P.
        (num_sign_bit_copies_binary_arith_p): New inline function.
        (cached_num_sign_bit_copies): Use it instead of ARITHMETIC_P.

        * gcc.dg/pr69592.c: New test.

Added:
    trunk/gcc/testsuite/gcc.dg/pr69592.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/rtlanal.c
    trunk/gcc/testsuite/ChangeLog