From: Richard Kenner <kenner@gcc.gnu.org>
Date: Sun, 25 Apr 1993 17:00:40 +0000 (-0400)
Subject: (make_decl_rtl): If a variable has an asm operand that refers to,
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=31e4b1c0990daaa780524bf61f060049571f018b;p=gcc.git

(make_decl_rtl): If a variable has an asm operand that refers to,

e.g., fp, make a distinct RTL for it.

From-SVN: r4215
---

diff --git a/gcc/varasm.c b/gcc/varasm.c
index 50b348fe8c0..16bb816aac8 100644
--- a/gcc/varasm.c
+++ b/gcc/varasm.c
@@ -354,7 +354,16 @@ make_decl_rtl (decl, asmspec, top_level)
 	    error ("global register variable follows a function definition");
 	  if (TREE_THIS_VOLATILE (decl))
 	    warning ("volatile register variables don't work as you might wish");
-	  DECL_RTL (decl) = gen_rtx (REG, DECL_MODE (decl), reg_number);
+
+	  /* If the user specified one of the eliminables registers here,
+	     e.g., FRAME_POINTER_REGNUM, we don't want to get this variable
+	     confused with that register and be eliminated.  Although this
+	     usage is somewhat suspect, we nevertheless use the following
+	     kludge to avoid setting DECL_RTL to frame_pointer_rtx.  */
+
+	  DECL_RTL (decl)
+	    = gen_rtx (REG, DECL_MODE (decl), FIRST_PSEUDO_REGISTER);
+	  REGNO (DECL_RTL (decl)) = reg_number;
 	  REG_USERVAR_P (DECL_RTL (decl)) = 1;
 
 	  if (top_level)