[Bug rtl-optimization/62004] dead type-unsafe load replaces type-safe load

["vries at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62004

--- Comment #7 from vries at gcc dot gnu.org ---
Author: vries
Date: Sat Aug 16 17:38:04 2014
New Revision: 214067

URL: https://gcc.gnu.org/viewcvs?rev=214067&root=gcc&view=rev
Log:
Fix if-conversion pass for dead type-unsafe code

2014-08-15  Tom de Vries  <tom@codesourcery.com>

    Backport from mainline:
    2014-08-14  Tom de Vries  <tom@codesourcery.com>

    PR rtl-optimization/62004
    PR rtl-optimization/62030
    * ifcvt.c (rtx_interchangeable_p): New function.
    (noce_try_move, noce_process_if_block): Use rtx_interchangeable_p.

    * gcc.dg/pr62004.c: New test.
    * gcc.dg/pr62030.c: Same.
    * gcc.target/mips/pr62030-octeon.c: Same.

    2014-08-05  Richard Biener  <rguenther@suse.de>

    * emit-rtl.h (mem_attrs_eq_p): Declare.
    * emit-rtl.c (mem_attrs_eq_p): Export.

Added:
    branches/gcc-4_8-branch/gcc/testsuite/gcc.dg/pr62004.c
    branches/gcc-4_8-branch/gcc/testsuite/gcc.dg/pr62030.c
    branches/gcc-4_8-branch/gcc/testsuite/gcc.target/mips/pr62030-octeon.c
Modified:
    branches/gcc-4_8-branch/gcc/ChangeLog
    branches/gcc-4_8-branch/gcc/emit-rtl.c
    branches/gcc-4_8-branch/gcc/emit-rtl.h
    branches/gcc-4_8-branch/gcc/ifcvt.c
    branches/gcc-4_8-branch/gcc/testsuite/ChangeLog