[Bug rtl-optimization/47525] DCE fails to eliminate a dead call to a pure function when compiled with -maltivec

[bergner at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47525

--- Comment #4 from Peter Bergner <bergner at gcc dot gnu.org> 2011-02-14 
21:07:10 UTC ---
Author: bergner
Date: Mon Feb 14 21:07:05 2011
New Revision: 170153

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=170153
Log:
    Backport from mainline
    2011-02-02  Peter Bergner  <berg...@vnet.ibm.com>

    PR rtl-optimization/47525
    * df-scan.c: Update copyright years.
    (df_get_call_refs): Do not mark global registers as DF_REF_REG_USE
    and non-clobber DF_REF_REG_DEF for calls to const and pure functions.

Modified:
    branches/ibm/gcc-4_5-branch/gcc/ChangeLog.ibm
    branches/ibm/gcc-4_5-branch/gcc/df-scan.c