[Bug tree-optimization/36343] [4.3 Regression] Wrong code due to bad TBAA pruning of points-to-sets and use in call clobbering

[rguenth at gcc dot gnu dot org]

------- Comment #10 from rguenth at gcc dot gnu dot org  2008-09-19 15:06 -------
Subject: Bug 36343

Author: rguenth
Date: Fri Sep 19 15:04:36 2008
New Revision: 140492

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=140492
Log:
2008-09-19  Richard Guenther  <rguenther@suse.de>

        PR tree-optimization/36343
        * tree-ssa-structalias.c (struct variable_info): Remove
        directly_dereferenced member.
        (new_var_info): Do not set it.
        (process_constraint_1): Likewise.
        (set_uids_in_ptset): Remove TBAA-pruning code.
        (find_what_p_points_to): Do not pass TBAA-pruning related
        parameters.

        * gcc.c-torture/execute/pr36343.c: New testcase.

Added:
    branches/gcc-4_3-branch/gcc/testsuite/gcc.c-torture/execute/pr36343.c
Modified:
    branches/gcc-4_3-branch/gcc/ChangeLog
    branches/gcc-4_3-branch/gcc/testsuite/ChangeLog
    branches/gcc-4_3-branch/gcc/tree-ssa-structalias.c


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36343