[Bug middle-end/35163] [4.1/4.2 Regression] folding comparison loses cast

[rguenth at gcc dot gnu dot org]

------- Comment #9 from rguenth at gcc dot gnu dot org  2008-03-25 10:18 -------
Subject: Bug 35163

Author: rguenth
Date: Tue Mar 25 10:17:54 2008
New Revision: 133509

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=133509
Log:
2008-03-25  Richard Guenther  <rguenther@suse.de>

        Backport from mainline:
        2008-02-12  Richard Guenther  <rguenther@suse.de>

        PR middle-end/35163
        * fold-const.c (fold_widened_comparison): Use get_unwidened in
        value-preserving mode.  Disallow final truncation.

        * gcc.c-torture/execute/pr35163.c: New testcase.

Added:
    branches/gcc-4_1-branch/gcc/testsuite/gcc.c-torture/execute/pr35163.c
      - copied unchanged from r132269,
trunk/gcc/testsuite/gcc.c-torture/execute/pr35163.c
Modified:
    branches/gcc-4_1-branch/gcc/ChangeLog
    branches/gcc-4_1-branch/gcc/fold-const.c
    branches/gcc-4_1-branch/gcc/testsuite/ChangeLog


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35163