sh.c (print_operand): lookup interrupt_handler attribute instead of relying on static variable.

* sh.c (print_operand): lookup interrupt_handler attribute instead
of relying on static variable.
* (calc_live_regs): Likewise.
* (sh_pragma_insert_attributes): Create interrupt_handler
attribute if a pragma was specified
* (sh_valid_machine_decl_attribute): Don't set static flag.
* sh.h (PRAGMA_INSERT_ATTRIBUTES): New.

From-SVN: r24265

3 files changed, 63 insertions, 4 deletions

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index d9f22c2..4c3bfe0 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -22,6 +22,16 @@
 	(fix-header.o): Likewise.
 	(scan-decls.o): Likewise.
 
+Fri Dec 11 11:02:49 1998  Stan Cox  <scox@cygnus.com>
+
+	* sh.c (print_operand): lookup interrupt_handler attribute instead
+	of relying on static variable. 
+	* (calc_live_regs): Likewise.
+	* (sh_pragma_insert_attributes): Create interrupt_handler
+	attribute if a pragma was specified
+	* (sh_valid_machine_decl_attribute): Don't set static flag.
+	* sh.h (PRAGMA_INSERT_ATTRIBUTES): New.
+
 Fri Dec 11 12:56:07 1998  J"orn Rennecke <amylaar@cygnus.co.uk>
 
 	* reload1.c (reload_combine): Use BASIC_BLOCK_LIVE_AT_START
diff --git a/gcc/config/sh/sh.c b/gcc/config/sh/sh.c
index cb40718..2eb4674 100644
--- a/gcc/config/sh/sh.c
+++ b/gcc/config/sh/sh.c
@@ -226,13 +226,25 @@ print_operand (stream, x, code)
       fprintf (stream, "%s", LOCAL_LABEL_PREFIX);
       break;
     case '@':
+      {
+	int interrupt_handler;
+
+	if ((lookup_attribute
+	     ("interrupt_handler",
+	      DECL_MACHINE_ATTRIBUTES (current_function_decl)))
+	    != NULL_TREE)
+	  interrupt_handler = 1;
+	else
+	  interrupt_handler = 0;
+	
       if (trap_exit)
 	fprintf (stream, "trapa #%d", trap_exit);
-      else if (pragma_interrupt)
+      else if (interrupt_handler)
 	fprintf (stream, "rte");
       else
 	fprintf (stream, "rts");
       break;
+      }
     case '#':
       /* Output a nop if there's nothing in the delay slot.  */
       if (dbr_sequence_length () == 0)
@@ -3615,13 +3627,22 @@ calc_live_regs (count_ptr, live_regs_mask2)
   int reg;
   int live_regs_mask = 0;
   int count;
+  int interrupt_handler;
+
+  if ((lookup_attribute
+       ("interrupt_handler",
+	DECL_MACHINE_ATTRIBUTES (current_function_decl)))
+      != NULL_TREE)
+    interrupt_handler = 1;
+  else
+    interrupt_handler = 0;
 
   *live_regs_mask2 = 0;
   /* If we can save a lot of saves by switching to double mode, do that.  */
   if (TARGET_SH4 && TARGET_FMOVD && TARGET_FPU_SINGLE)
     for (count = 0, reg = FIRST_FP_REG; reg <= LAST_FP_REG; reg += 2)
       if (regs_ever_live[reg] && regs_ever_live[reg+1]
-	  && (! call_used_regs[reg] || (pragma_interrupt && ! pragma_trapa))
+	  && (! call_used_regs[reg] || (interrupt_handler && ! pragma_trapa))
 	  && ++count > 2)
 	{
 	  target_flags &= ~FPU_SINGLE_BIT;
@@ -3629,7 +3650,7 @@ calc_live_regs (count_ptr, live_regs_mask2)
 	}
   for (count = 0, reg = FIRST_PSEUDO_REGISTER - 1; reg >= 0; reg--)
     {
-      if ((pragma_interrupt && ! pragma_trapa)
+      if ((interrupt_handler && ! pragma_trapa)
 	  ? (/* Need to save all the regs ever live.  */
 	     (regs_ever_live[reg]
 	      || (call_used_regs[reg]
@@ -3951,6 +3972,31 @@ sh_handle_pragma (p_getc, p_ungetc, pname)
 
   return retval;
 }
+
+/* Generate 'handle_interrupt' attribute for decls */
+
+void
+sh_pragma_insert_attributes (node, attributes, prefix)
+     tree node;
+     tree * attributes;
+     tree * prefix;
+{
+  tree a;
+
+  if (! pragma_interrupt
+      || TREE_CODE (node) != FUNCTION_DECL)
+    return;
+
+  /* We are only interested in fields.  */
+  if (TREE_CODE_CLASS (TREE_CODE (node)) != 'd')
+    return;
+
+  /* Add a 'handle_interrupt' attribute.  */
+  * attributes = tree_cons (get_identifier ("interrupt_handler"), NULL, * attributes);
+
+  return;
+}
+
 /* Return nonzero if ATTR is a valid attribute for DECL.
    ATTRIBUTES are any existing attributes and ARGS are the arguments
    supplied with ATTR.
@@ -3979,7 +4025,6 @@ sh_valid_machine_decl_attribute (decl, attributes, attr, args)
 
   if (is_attribute_p ("interrupt_handler", attr))
     {
-      pragma_interrupt = 1;
       return 1;
     }
 
diff --git a/gcc/config/sh/sh.h b/gcc/config/sh/sh.h
index c32b13a..e2bf8c7 100644
--- a/gcc/config/sh/sh.h
+++ b/gcc/config/sh/sh.h
@@ -2062,6 +2062,10 @@ extern int sh_valid_machine_decl_attribute ();
 #define VALID_MACHINE_DECL_ATTRIBUTE(DECL, ATTRIBUTES, IDENTIFIER, ARGS) \
 sh_valid_machine_decl_attribute (DECL, ATTRIBUTES, IDENTIFIER, ARGS)
 
+extern void sh_pragma_insert_attributes ();
+#define PRAGMA_INSERT_ATTRIBUTES(node, pattr, prefix_attr) \
+  sh_pragma_insert_attributes (node, pattr, prefix_attr)
+
 extern int sh_flag_remove_dead_before_cse;
 extern int rtx_equal_function_value_matters;
 extern struct rtx_def *fpscr_rtx;