[Bug middle-end/27116] [4.2 Regression] Incorrect integer division (wrong sign).

[rguenth at gcc dot gnu dot org]

------- Comment #20 from rguenth at gcc dot gnu dot org  2006-06-08 08:49 -------
Subject: Bug 27116

Author: rguenth
Date: Thu Jun  8 08:49:19 2006
New Revision: 114483

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=114483
Log:
2006-06-08  Richard Guenther  <rguenther@suse.de>

        PR middle-end/27116
        * fold-const.c (negate_expr_p): We can negate BIT_NOT_EXPR
        only, if overflow is defined and not trapping.
        (negate_expr): Likewise.

        * gcc.dg/torture/pr27116.c: New testcase.
        * gcc.dg/pr15785-1.c: Remove test for invalid transformation.

Added:
    trunk/gcc/testsuite/gcc.dg/torture/pr27116.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/fold-const.c
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/testsuite/gcc.dg/pr15785-1.c


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27116