[Bug rtl-optimization/40924] [4.4 Regression] miscompiles with -03 (seemingly related to attribute may_alias)

[jakub at gcc dot gnu dot org]

------- Comment #6 from jakub at gcc dot gnu dot org  2009-08-05 12:36 -------
Subject: Bug 40924

Author: jakub
Date: Wed Aug  5 12:36:34 2009
New Revision: 150483

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=150483
Log:
        PR rtl-optimization/40924
        * dse.c (canon_address): Before calling cselib_expand_value_rtx
        make sure canon_rtx (mem_address) isn't simpler than
        canon_rtx (expanded_mem_address).

        * g++.dg/torture/pr40924.C: New test.

Added:
    trunk/gcc/testsuite/g++.dg/torture/pr40924.C
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/dse.c
    trunk/gcc/testsuite/ChangeLog


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40924