emit_rtl.c (init_emit_once): Ensure that potential aliasing between frame_pointer_rtx...

        * emit_rtl.c (init_emit_once): Ensure that potential aliasing
        between frame_pointer_rtx, hard_frame_pointer_rtx, and
        arg_pointer_rtx is respected in initialization.
        (init_emit_once): Use gen_rtx_raw_REG() to create
        return_address_pointer_rtx.
	* rtl.h: Fix typo.

From-SVN: r17409

gcc/ChangeLog

@@ -48,6 +48,12 @@ Sat Jan 17 22:35:39 1998  Mumit Khan <khan@xraylith.wisc.edu>
 
 1998-01-17  Lee Iverson  <leei@Canada.AI.SRI.COM>
 
+	* emit_rtl.c (init_emit_once): Ensure that potential aliasing
+	between frame_pointer_rtx, hard_frame_pointer_rtx, and
+	arg_pointer_rtx is respected in initialization.
+	(init_emit_once): Use gen_rtx_raw_REG() to create
+	return_address_pointer_rtx.
+
 	* reorg.c: #include "expr.h" for rtx prototypes.
 	* Makefile.in (reorg.o): Depend on expr.h
 
@@ -62,6 +68,8 @@ Sat Jan 17 21:24:16 1998  David T. McWherter <dtm@waterw.com>
 
 Sat Jan 17 21:16:19 1998  Jeffrey A Law  (law@cygnus.com)
 
+	* rtl.h: Fix typos.
+
 	* acconfig.h (NEED_DECLARATION_ATOL): New declaration to check for.
 	* rtl.c (atol): Only provide the declaration if NEED_DECLARATION_ATOL.
 

gcc/emit-rtl.c

@@ -3425,10 +3425,14 @@ init_emit_once (line_numbers)
   PUT_MODE (stack_pointer_rtx, Pmode);
   REGNO (frame_pointer_rtx) = FRAME_POINTER_REGNUM;
   PUT_MODE (frame_pointer_rtx, Pmode);
+#if HARD_FRAME_POINTER_REGNUM != FRAME_POINTER_REGNUM
   REGNO (hard_frame_pointer_rtx) = HARD_FRAME_POINTER_REGNUM;
   PUT_MODE (hard_frame_pointer_rtx, Pmode);
+#endif
+#if FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM && HARD_FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM
   REGNO (arg_pointer_rtx) = ARG_POINTER_REGNUM;
   PUT_MODE (arg_pointer_rtx, Pmode);
+#endif
 
   REGNO (virtual_incoming_args_rtx) = VIRTUAL_INCOMING_ARGS_REGNUM;
   PUT_MODE (virtual_incoming_args_rtx, Pmode);
@@ -3440,8 +3444,8 @@ init_emit_once (line_numbers)
   PUT_MODE (virtual_outgoing_args_rtx, Pmode);
 
 #ifdef RETURN_ADDRESS_POINTER_REGNUM
-  return_address_pointer_rtx = gen_rtx_REG (Pmode,
-					    RETURN_ADDRESS_POINTER_REGNUM);
+  return_address_pointer_rtx
+    = gen_rtx_raw_REG (Pmode, RETURN_ADDRESS_POINTER_REGNUM);
 #endif
 
 #ifdef STRUCT_VALUE

gcc/rtl.h

@@ -970,7 +970,7 @@ extern rtx gen_rtx_REG PROTO((enum machine_mode, int));
 #if FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
 #define arg_pointer_rtx		(&global_rtl.frame_pointer_val)
 #else
-#if HARD_POINTER_REGNUM == ARG_POINTER_REGNUM
+#if HARD_FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
 #define arg_pointer_rtx		(&global_rtl.hard_frame_pointer_val)
 #else
 #define arg_pointer_rtx		(&global_rtl.arg_pointer_val)