[PATCH] Improve shrink wrap for lo_sum

[Andrew Pinski]

Hi,
  As discussed at
https://gcc.gnu.org/ml/gcc-patches/2014-10/msg00997.html, this is the
one line patch which improves shrink wrapping for lo_sum.

OK?  Bootstrapped and tested on x86_64 and built and tested for
aarch64-elf with no regressions.  It fixes shrink_wrap_symbol_ref_1.c
which was failing with -mabi=ilp32.

Thanks,
Andrew

ChangeLog:
* shrink-wrap.c (move_insn_for_shrink_wrap): Allow LO_SUM also.

diff --git a/gcc/shrink-wrap.c b/gcc/shrink-wrap.c
index aae6643..3392cdb 100644
--- a/gcc/shrink-wrap.c
+++ b/gcc/shrink-wrap.c
@@ -248,6 +248,7 @@ move_insn_for_shrink_wrap (basic_block bb, rtx_insn *insn,
                case SUBREG:
                case STRICT_LOW_PART:
                case PC:
+               case LO_SUM:
                  /* Ok.  Continue.  */
                  break;