[Bug debug/48967] [4.6/4.7 Regression] ICE during use_narrower_mode

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48967

--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> 2011-05-12 
11:54:36 UTC ---
Author: jakub
Date: Thu May 12 11:54:33 2011
New Revision: 173701

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=173701
Log:
    PR debug/48967
    * var-tracking.c (use_narrower_mode_test) <case REG>: Return 1
    if validate_subreg fails.

    * g++.dg/opt/pr48967.C: New test.

Added:
    trunk/gcc/testsuite/g++.dg/opt/pr48967.C
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/var-tracking.c