sh.md (UNSPECV_SP_SWITCH_B): New.

* config/sh/sh.md (UNSPECV_SP_SWITCH_B): New.
(UNSPECV_SP_SWITCH_E): New.
(sp_switch_1): Change to an unspec.
(sp_switch_2): Change to an unspec.  Don't use post-inc when we
replace $r15.
* config/sh/sh.c (sh_expand_prologue): Use the constant pool to
reference the new stack's address

From-SVN: r150306

gcc/ChangeLog

+2009-07-31  DJ Delorie  <dj@redhat.com>
+
+	* config/sh/sh.md (UNSPECV_SP_SWITCH_B): New.
+	(UNSPECV_SP_SWITCH_E): New.
+	(sp_switch_1): Change to an unspec.
+	(sp_switch_2): Change to an unspec.  Don't use post-inc when we
+	replace $r15.
+	* config/sh/sh.c (sh_expand_prologue): Use the constant pool to
+	reference the new stack's address
+
 2009-07-30  Sebastian Pop  <sebastian.pop@amd.com>
 
 	* Makefile.in (OBJS-common): Added dependence on graphite-blocking.o,

gcc/config/sh/sh.c

@@ -6743,13 +6743,19 @@ sh_expand_prologue (void)
   /* If we're supposed to switch stacks at function entry, do so now.  */
   if (sp_switch_attr)
     {
+      rtx lab, newsrc;
       /* The argument specifies a variable holding the address of the
 	 stack the interrupt function should switch to/from at entry/exit.  */
+      tree arg = TREE_VALUE ( TREE_VALUE (sp_switch_attr));
       const char *s
-	= ggc_strdup (TREE_STRING_POINTER (TREE_VALUE (sp_switch_attr)));
+	= ggc_strdup (TREE_STRING_POINTER (arg));
       rtx sp_switch = gen_rtx_SYMBOL_REF (Pmode, s);
 
-      emit_insn (gen_sp_switch_1 (sp_switch));
+      lab = add_constant (sp_switch, SImode, 0);
+      newsrc = gen_rtx_LABEL_REF (VOIDmode, lab);
+      newsrc = gen_const_mem (SImode, newsrc);
+
+      emit_insn (gen_sp_switch_1 (newsrc));
     }
 
   d = calc_live_regs (&live_regs_mask);