[Bug rtl-optimization/78559] [7 Regression] wrong code due to tree if-conversion?

[amker at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78559

--- Comment #13 from amker at gcc dot gnu.org ---
Author: amker
Date: Fri Jan 27 14:42:23 2017
New Revision: 244979

URL: https://gcc.gnu.org/viewcvs?rev=244979&root=gcc&view=rev
Log:
        PR rtl-optimization/78559
        * combine.c (try_combine): Discard REG_EQUAL and REG_EQUIV for
        other_insn in combine.

        gcc/testsuite
        PR rtl-optimization/78559
        * gcc.c-torture/execute/pr78559.c: New test.

Added:
    trunk/gcc/testsuite/gcc.c-torture/execute/pr78559.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/combine.c
    trunk/gcc/testsuite/ChangeLog