From: Bernd Schmidt <bernds@redhat.com>
Date: Wed, 15 Mar 2017 13:36:50 +0000 (+0000)
Subject: c6x.c (hwloop_optimize): Handle case where the old iteration reg is used after the... 
X-Git-Tag: upstream/12.2.0~40687
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=6c194efb233f17da1d6971121dcb2f86a671f946;p=platform%2Fupstream%2Fgcc.git

c6x.c (hwloop_optimize): Handle case where the old iteration reg is used after the loop.

	* config/c6x/c6x.c (hwloop_optimize): Handle case where the old
	iteration reg is used after the loop.

From-SVN: r246160
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index d9f1054b..eacca23 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2017-03-15  Bernd Schmidt  <bschmidt@redhat.com>
+
+	* config/c6x/c6x.c (hwloop_optimize): Handle case where the old
+	iteration reg is used after the loop.
+
 2017-03-14  Martin Sebor  <msebor@redhat.com>
 
 	PR tree-optimization/79800
diff --git a/gcc/config/c6x/c6x.c b/gcc/config/c6x/c6x.c
index c54d4d1..4529fd4 100644
--- a/gcc/config/c6x/c6x.c
+++ b/gcc/config/c6x/c6x.c
@@ -5789,8 +5789,9 @@ hwloop_optimize (hwloop_info loop)
   start_sequence ();
 
   insn = emit_insn (gen_mvilc (loop->iter_reg));
+  if (loop->iter_reg_used_outside)
+    insn = emit_move_insn (loop->iter_reg, const0_rtx);
   insn = emit_insn (gen_sploop (GEN_INT (sp_ii)));
-
   seq = get_insns ();
 
   if (!single_succ_p (entry_bb) || vec_safe_length (loop->incoming) > 1)