[Bug tree-optimization/48149] Piecewise complex pass-through not optimized

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48149

--- Comment #3 from Richard Guenther <rguenth at gcc dot gnu.org> 2011-09-06 
14:36:06 UTC ---
Author: rguenth
Date: Tue Sep  6 14:36:00 2011
New Revision: 178597

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=178597
Log:
2011-09-06  Richard Guenther  <rguent...@suse.de>

    PR tree-optimization/48149
    * tree-ssa-sccvn.c (vn_get_expr_for): Simplify.  Fix tuplification bug.
    (vn_valueize): Move earlier.
    (valueize_expr): Use vn_valueize.
    (simplify_binary_expression): Simplify, also combine COMPLEX_EXPR
    operands.
    (simplify_unary_expression): Simplify.

    * gcc.dg/tree-ssa/ssa-fre-32.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-32.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-sccvn.c