From 754fdcca7a6c812a0917ca6cb4a79a2e3e32c897 Mon Sep 17 00:00:00 2001
From: Richard Kenner <kenner@gcc.gnu.org>
Date: Sun, 29 Sep 1996 19:05:36 -0400
Subject: [PATCH] (mark_user_reg): New function.

From-SVN: r12869
---
 gcc/emit-rtl.c | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/gcc/emit-rtl.c b/gcc/emit-rtl.c
index aaebc6fa65b..522b95ff1c9 100644
--- a/gcc/emit-rtl.c
+++ b/gcc/emit-rtl.c
@@ -540,6 +540,23 @@ gen_reg_rtx (mode)
   return val;
 }
 
+/* Identify REG (which may be a CONCAT) as a user register.  */
+
+void
+mark_user_reg (reg)
+     rtx reg;
+{
+  if (GET_CODE (reg) == CONCAT)
+    {
+      REG_USERVAR_P (XEXP (reg, 0)) = 1;
+      REG_USERVAR_P (XEXP (reg, 1)) = 1;
+    }
+  else if (GET_CODE (reg) == REG)
+    REG_USERVAR_P (reg) = 1;
+  else
+    abort ();
+}
+
 /* Identify REG as a probable pointer register and show its alignment
    as ALIGN, if nonzero.  */
 
-- 
2.30.2