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Subject: [Bug c/35634] [4.6/4.7/4.8 Regression] operand of pre-/postin-/decrement not promoted
Date: Wed, 28 Nov 2012 09:27:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35634

--- Comment #37 from Richard Biener <rguenth at gcc dot gnu.org> 2012-11-28 09:27:14 UTC ---
Author: rguenth
Date: Wed Nov 28 09:27:10 2012
New Revision: 193882

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=193882
Log:
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.

Added:
    trunk/gcc/testsuite/g++.dg/torture/pr35634.C
    trunk/gcc/testsuite/gcc.dg/torture/pr35634.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/c-family/ChangeLog
    trunk/gcc/c-family/c-gimplify.c
    trunk/gcc/gimple.h
    trunk/gcc/gimplify.c
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/testsuite/gcc.dg/vect/pr18536.c
    trunk/gcc/tree-vect-loop-manip.c