[Bug tree-optimization/56448] [4.8 Regression] cc1 hangs on volatile array with -O or above

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56448

--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> 2013-02-26 10:00:55 UTC ---
Author: jakub
Date: Tue Feb 26 10:00:31 2013
New Revision: 196278

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=196278
Log:
    PR tree-optimization/56448
    * fold-const.c (operand_equal_p) <case tcc_reference>: Don't look at
    TREE_SIDE_EFFECTS if flags contain OEP_CONSTANT_ADDRESS_OF.
    Clear OEP_CONSTANT_ADDRESS_OF from flags before recursing on second or
    later operands of the references, or even first operand for
    INDIRECT_REF, TARGET_MEM_REF or MEM_REF.

    * gcc.c-torture/compile/pr56448.c: New test.

Added:
    trunk/gcc/testsuite/gcc.c-torture/compile/pr56448.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/fold-const.c
    trunk/gcc/testsuite/ChangeLog