[Bug tree-optimization/48694] [4.7 Regression] possible memory hog bug

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48694

--- Comment #7 from Richard Guenther <rguenth at gcc dot gnu.org> 2011-04-26 09:21:47 UTC ---
Author: rguenth
Date: Tue Apr 26 09:21:44 2011
New Revision: 172954

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=172954
Log:
2011-04-26  Richard Guenther  <rguenther@suse.de>

    PR middle-end/48694
    * tree.h (OEP_CONSTANT_ADDRESS_OF): New operand_equal_flag.
    * fold-const.c (operand_equal_p): For TREE_CONSTANT ADDR_EXPRs
    compare the operands with OEP_CONSTANT_ADDRESS_OF.  Treat
    trees with TREE_SIDE_EFFECTS equal when OEP_CONSTANT_ADDRESS_OF
    is set.

    * gcc.dg/torture/pr48694-1.c: New testcase.
    * gcc.dg/torture/pr48694-2.c: Likewise.

Added:
    trunk/gcc/testsuite/gcc.dg/torture/pr48694-1.c
    trunk/gcc/testsuite/gcc.dg/torture/pr48694-2.c
Modified:
    trunk/gcc/fold-const.c
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree.h