[Bug tree-optimization/21258] Teach VRP to pick up a constant from case label.

[rguenth at gcc dot gnu dot org]

------- Comment #9 from rguenth at gcc dot gnu dot org  2007-04-13 10:21 -------
Subject: Bug 21258

Author: rguenth
Date: Fri Apr 13 10:21:22 2007
New Revision: 123778

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=123778
Log:
2007-04-13  Richard Guenther  <rguenther@suse.de>

        PR tree-optimization/21258
        * tree-vrp.c (compare_case_labels): New helper.
        (find_switch_asserts): New function.
        (find_assert_locations): Call it for SWITCH_EXPRs.

        * gcc.dg/tree-ssa/vrp34.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/tree-ssa/vrp34.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-vrp.c


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21258