From: DJ Delorie <dj@redhat.com>
Date: Thu, 12 Sep 2013 22:43:30 +0000 (-0400)
Subject: rl78.c (rl78_expand_prologue): Use AX to copy between SP and FP.
X-Git-Tag: releases/gcc-4.9.0~4098
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=17b2557c8348c79c6f1a4d6c3a46114011739eff;p=thirdparty%2Fgcc.git

rl78.c (rl78_expand_prologue): Use AX to copy between SP and FP.

* config/rl78/rl78.c (rl78_expand_prologue): Use AX to copy
between SP and FP.
(rl78_expand_epilogue): Likewise.

From-SVN: r202542
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 91dba09a8662..5dc8ed03385d 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2013-09-12  DJ Delorie  <dj@redhat.com>
+
+	* config/rl78/rl78.c (rl78_expand_prologue): Use AX to copy
+	between SP and FP.
+	(rl78_expand_epilogue): Likewise.
+
 2013-09-12  Vladimir Makarov  <vmakarov@redhat.com>
 
 	PR middle-end/58335
diff --git a/gcc/config/rl78/rl78.c b/gcc/config/rl78/rl78.c
index cd9010ab1905..3f13955d896e 100644
--- a/gcc/config/rl78/rl78.c
+++ b/gcc/config/rl78/rl78.c
@@ -1036,8 +1036,12 @@ rl78_expand_prologue (void)
     emit_insn (gen_sel_rb (GEN_INT (0)));
 
   if (frame_pointer_needed)
-    F (emit_move_insn (gen_rtx_REG (HImode, FRAME_POINTER_REGNUM),
-		       gen_rtx_REG (HImode, STACK_POINTER_REGNUM)));
+    {
+      F (emit_move_insn (gen_rtx_REG (HImode, AX_REG),
+			 gen_rtx_REG (HImode, STACK_POINTER_REGNUM)));
+      F (emit_move_insn (gen_rtx_REG (HImode, FRAME_POINTER_REGNUM),
+			 gen_rtx_REG (HImode, AX_REG)));
+    }
 
   fs = cfun->machine->framesize_locals + cfun->machine->framesize_outgoing;
   while (fs > 0)
@@ -1061,8 +1065,10 @@ rl78_expand_epilogue (void)
 
   if (frame_pointer_needed)
     {
-      emit_move_insn (gen_rtx_REG (HImode, STACK_POINTER_REGNUM),
+      emit_move_insn (gen_rtx_REG (HImode, AX_REG),
 		      gen_rtx_REG (HImode, FRAME_POINTER_REGNUM));
+      emit_move_insn (gen_rtx_REG (HImode, STACK_POINTER_REGNUM),
+		      gen_rtx_REG (HImode, AX_REG));
     }
   else
     {