From: Richard Kenner <kenner@gcc.gnu.org>
Date: Mon, 3 Aug 1992 01:44:23 +0000 (-0400)
Subject: (gen_rtx, case REG): Don't use frame_pointer_rtx or arg_pointer_rtx if
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=600a5d8863b1800e2dbf85e62baae61d0b4178c3;p=gcc.git

(gen_rtx, case REG): Don't use frame_pointer_rtx or arg_pointer_rtx if
reload is in progress.

From-SVN: r1758
---

diff --git a/gcc/emit-rtl.c b/gcc/emit-rtl.c
index f4d898a779f..a540ef7a3e6 100644
--- a/gcc/emit-rtl.c
+++ b/gcc/emit-rtl.c
@@ -271,15 +271,21 @@ gen_rtx (va_alist)
 	 If we have eliminated the frame pointer or arg pointer, we will
 	 be using it as a normal register, for example as a spill register.
 	 In such cases, we might be accessing it in a mode that is not
-	 Pmode and therefore cannot use the pre-allocated rtx.  */
+	 Pmode and therefore cannot use the pre-allocated rtx.
 
-      if (frame_pointer_rtx && regno == FRAME_POINTER_REGNUM && mode == Pmode)
+	 Also don't do this when we are making new REGs in reload,
+	 since we don't want to get confused with the real pointers.  */
+
+      if (frame_pointer_rtx && regno == FRAME_POINTER_REGNUM && mode == Pmode
+	  && ! reload_in_progress)
 	return frame_pointer_rtx;
 #if FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM
-      if (arg_pointer_rtx && regno == ARG_POINTER_REGNUM && mode == Pmode)
+      if (arg_pointer_rtx && regno == ARG_POINTER_REGNUM && mode == Pmode
+	  && ! reload_in_progress)
 	return arg_pointer_rtx;
 #endif
-      if (stack_pointer_rtx && regno == STACK_POINTER_REGNUM && mode == Pmode)
+      if (stack_pointer_rtx && regno == STACK_POINTER_REGNUM && mode == Pmode
+	  && ! reload_in_progress)
 	return stack_pointer_rtx;
       else
 	{