[Bug tree-optimization/35609] [4.3/4.4 Regression] "is used uninitialized in this function" should be may warning

[rguenth at gcc dot gnu dot org]

------- Comment #4 from rguenth at gcc dot gnu dot org  2008-03-19 10:45 -------
Subject: Bug 35609

Author: rguenth
Date: Wed Mar 19 10:44:52 2008
New Revision: 133341

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=133341
Log:
2008-03-19  Richard Guenther  <rguenther@suse.de>

        PR middle-end/35609
        * tree-ssa.c (always_executed): New global flag.
        (warn_uninitialized_var): If !always_executed warn with "maybe"
        instead of "is".
        (execute_early_warn_uninitialized): Compute post-dominators.
        Initialize always_executed before processing each basic block.

        * gcc.dg/testsuite/uninit-15.c: New testcase.
        * gcc.dg/testsuite/uninit-16.c: Likewise.

Added:
    trunk/gcc/testsuite/gcc.dg/uninit-15.c
    trunk/gcc/testsuite/gcc.dg/uninit-16.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa.c


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35609