[Bug target/59371] [4.8/4.9 Regression] Performance regression in GCC 4.8 and later versions.

[macro@linux-mips.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59371

Maciej W. Rozycki <macro@linux-mips.org> changed:

           What    |Removed                     |Added
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                 CC|                            |macro@linux-mips.org

--- Comment #3 from Maciej W. Rozycki <macro@linux-mips.org> ---
Caused by:

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r193882 | rguenth | 2012-11-28 09:27:10 +0000 (Wed, 28 Nov 2012) | 19 lines

2012-11-28  Richard Biener  <rguenther@suse.de>

    PR c/35634
    * gimple.h (gimplify_self_mod_expr): Declare.
    * gimplify.c (gimplify_self_mod_expr): Export.  Take a different
    type for performing the arithmetic in.
    (gimplify_expr): Adjust.
    * tree-vect-loop-manip.c (vect_can_advance_ivs_p): Strip
    sign conversions we can re-apply after adjusting the IV.

    c-family/
    * c-gimplify.c (c_gimplify_expr): Gimplify self-modify expressions
    here and use a type with proper overflow behavior for types that would
    need to be promoted for the arithmetic.

    * gcc.dg/torture/pr35634.c: New testcase.
    * g++.dg/torture/pr35634.C: Likewise.
    * gcc.dg/vect/pr18536.c: Mark worker function noinline.

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