[Bug debug/47780] [4.5/4.6 Regression] -fcompare-debug failure with -O -fgcse -fgcse-las -fstack-protector-all

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47780

--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> 2011-02-18 
10:42:51 UTC ---
Author: jakub
Date: Fri Feb 18 10:42:48 2011
New Revision: 170270

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=170270
Log:
    PR debug/47780
    * cfgexpand.c (expand_debug_expr) <case SSA_NAME>: Call copy_rtx to
    avoid invalid rtx sharing.

    * gcc.target/i386/pr47780.c: New test.

Added:
    trunk/gcc/testsuite/gcc.target/i386/pr47780.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/cfgexpand.c
    trunk/gcc/testsuite/ChangeLog