http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46804
--- Comment #9 from Jakub Jelinek <jakub at gcc dot gnu.org> 2011-01-16 20:16:34 UTC --- Author: jakub Date: Sun Jan 16 20:16:30 2011 New Revision: 168863 URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=168863 Log: Backport from mainline 2010-12-10 Jakub Jelinek <ja...@redhat.com> PR rtl-optimization/46804 * regmove.c (optimize_reg_copy_3): Look for REG_EQUAL note on the setter of src_reg rather than on insn. If it is equal to the setter's original SET_SRC, replace it with its zero or sign extension instead of dropping it. * gfortran.dg/pr46804.f90: New test. Added: branches/gcc-4_5-branch/gcc/testsuite/gfortran.dg/pr46804.f90 Modified: branches/gcc-4_5-branch/gcc/ChangeLog branches/gcc-4_5-branch/gcc/regmove.c branches/gcc-4_5-branch/gcc/testsuite/ChangeLog
