[Bug tree-optimization/47391] [4.5/4.6 Regression] read from const volatile incorrectly eliminated

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47391

--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> 2011-01-21 
12:57:55 UTC ---
Author: jakub
Date: Fri Jan 21 12:57:52 2011
New Revision: 169084

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=169084
Log:
    PR tree-optimization/47391
    * varpool.c (const_value_known_p): Return false if
    decl is volatile.

    * gcc.dg/pr47391.c: New test.

Added:
    trunk/gcc/testsuite/gcc.dg/pr47391.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/varpool.c