[Bug rtl-optimization/46034] [4.6 regression] internal compiler error: segmentation fault

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46034

--- Comment #13 from Jakub Jelinek <jakub at gcc dot gnu.org> 2010-11-03 
08:30:30 UTC ---
Author: jakub
Date: Wed Nov  3 08:30:21 2010
New Revision: 166231

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=166231
Log:
    PR rtl-optimization/46034
    PR rtl-optimization/46212
    PR rtl-optimization/46248
    * combine.c (try_combine): If added_sets_2 where i0dest_in_i0src
    and i0 feeds i1 and i1 feeds i2 or i0 feeds i2, make a copy of i1src
    before i0dest -> i0src substitution and pass 1 instead of 0 as last
    argument to subst on i2pat.

    * gcc.c-torture/compile/pr46034.c: New test.
    * gcc.c-torture/compile/pr46248.c: New test.
    * gcc.dg/pr46212.c: New test.

Added:
    trunk/gcc/testsuite/gcc.c-torture/compile/pr46034.c
    trunk/gcc/testsuite/gcc.c-torture/compile/pr46248.c
    trunk/gcc/testsuite/gcc.dg/pr46212.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/combine.c
    trunk/gcc/testsuite/ChangeLog