[Bug rtl-optimization/52060] [4.6 Regression] Invalid constant simplification in combine with parallel result

[jingyu at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52060

--- Comment #14 from Jing Yu <jingyu at gcc dot gnu.org> 2012-03-02 01:01:31 UTC ---
Author: jingyu
Date: Fri Mar  2 01:01:16 2012
New Revision: 184771

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=184771
Log:
2012-03-01  Jing Yu  <jingyu@google.com>
       Backport r184061 from gcc-4_6-branch to fix PR52060.

       2012-02-07  Jakub Jelinek  <jakub@redhat.com>
       PR rtl-optimization/52060
       * gcc.dg/torture/pr52060.c: New test.

       2012-02-07  Jakub Jelinek  <jakub@redhat.com>
       PR rtl-optimization/52060
       * combine.c (try_combine): Add i0src_copy and i0src_copy2 variables,
       copy i1src to i1src_copy whenever added_sets_2 && i1_feeds_i2_n
       already before i1dest -> i1src substitution in newpat, copy i0src
       to i0src_copy and/or i0src_copy2 when needed.


Added:
    branches/google/gcc-4_6_2-mobile/gcc/testsuite/gcc.dg/torture/pr52060.c
Modified:
    branches/google/gcc-4_6_2-mobile/gcc/ChangeLog.google-4_6
    branches/google/gcc-4_6_2-mobile/gcc/combine.c
    branches/google/gcc-4_6_2-mobile/gcc/testsuite/ChangeLog.google-4_6