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[Bug tree-optimization/38884] missed FRE with __real and __imag

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38884

--- Comment #6 from Richard Guenther <rguenth at gcc dot gnu.org> 2011-10-06 08:41:54 UTC ---
Author: rguenth
Date: Thu Oct  6 08:41:44 2011
New Revision: 179593

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=179593
Log:
2011-10-06  Richard Guenther  <rguenther@suse.de>

    PR tree-optimization/38884
    * tree-ssa-sccvn.c (vn_reference_lookup_3): Handle partial
    reads from aggregate SSA names.

    * gcc.dg/tree-ssa/ssa-fre-34.c: New testcase.
    * gcc.dg/tree-ssa/ssa-fre-35.c: Likewise.

Added:
    trunk/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-34.c
    trunk/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-35.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-sccvn.c
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