[Bug rtl-optimization/52573] [4.6/4.7/4.8 regression] regrename creates overlapping register allocations for output operands

[law at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52573



--- Comment #13 from Jeffrey A. Law <law at gcc dot gnu.org> 2013-01-18 
07:54:52 UTC ---

Author: law

Date: Fri Jan 18 07:54:47 2013

New Revision: 195288



URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=195288

Log:

    PR rtl-optimization/52573

        * regrename.c (build_def_use): Ignore REG_DEAD notes if there is

        a REG_UNUSED for the same register.



    * gcc.dg/pr52573.c: New test.



Added:

    trunk/gcc/testsuite/gcc.dg/pr52573.c

Modified:

    trunk/gcc/ChangeLog

    trunk/gcc/regrename.c

    trunk/gcc/testsuite/ChangeLog