function.h (struct function): Rename calls_unwind_init to saves_all_registers.

	* function.h (struct function): Rename calls_unwind_init
	to saves_all_registers.
	(current_function_saves_all_registers): Renamed from
	current_function_calls_unwind_init.
	* reload1.c (reload): Set current_function_saves_all_registers.
	* except.c (expand_builtin_unwind_init): Likewise.
	* config/m68k/m68k.c (m68k_save_reg): Use
	current_function_saves_all_registers to save pic register.

From-SVN: r128248

gcc/ChangeLog

+2007-09-07  Roman Zippel <zippel@linux-m68k.org>
+
+	* function.h (struct function): Rename calls_unwind_init
+	to saves_all_registers.
+	(current_function_saves_all_registers): Renamed from
+	current_function_calls_unwind_init.
+	* reload1.c (reload): Set current_function_saves_all_registers.
+	* except.c (expand_builtin_unwind_init): Likewise.
+	* config/m68k/m68k.c (m68k_save_reg): Use
+	current_function_saves_all_registers to save pic register.
+
 2007-09-07  Janis Johnson  <janis187@us.ibm.com>
 
 	config/m68k/m68k.c (floating_exact_log2): Update call to real_2expN.

gcc/config/m68k/m68k.c

@@ -780,9 +780,7 @@ m68k_save_reg (unsigned int regno, bool interrupt_handler)
 {
   if (flag_pic && regno == PIC_REG)
     {
-      /* A function that receives a nonlocal goto must save all call-saved
-	 registers.  */
-      if (current_function_has_nonlocal_label)
+      if (current_function_saves_all_registers)
 	return true;
       if (current_function_uses_pic_offset_table)
 	return true;

gcc/except.c

@@ -2867,7 +2867,7 @@ expand_builtin_unwind_init (void)
 {
   /* Set this so all the registers get saved in our frame; we need to be
      able to copy the saved values for any registers from frames we unwind.  */
-  current_function_calls_unwind_init = 1;
+  current_function_saves_all_registers = 1;
 
 #ifdef SETUP_FRAME_ADDRESSES
   SETUP_FRAME_ADDRESSES ();

gcc/function.h

@@ -387,9 +387,10 @@ struct function GTY(())
      from nested functions.  */
   unsigned int has_nonlocal_label : 1;
 
-  /* Nonzero if function calls builtin_unwind_init.  */
-  unsigned int calls_unwind_init : 1;
-  
+  /* Nonzero if function saves all registers, e.g. if it has a nonlocal
+     label that can reach the exit block via non-exceptional paths. */
+  unsigned int saves_all_registers : 1;
+
   /* Nonzero if function being compiled has nonlocal gotos to parent
      function.  */
   unsigned int has_nonlocal_goto : 1;
@@ -503,7 +504,7 @@ extern void pop_cfun (void);
 #define current_function_uses_const_pool (cfun->uses_const_pool)
 #define current_function_epilogue_delay_list (cfun->epilogue_delay_list)
 #define current_function_has_nonlocal_label (cfun->has_nonlocal_label)
-#define current_function_calls_unwind_init (cfun->calls_unwind_init)
+#define current_function_saves_all_registers (cfun->saves_all_registers)
 #define current_function_has_nonlocal_goto (cfun->has_nonlocal_goto)
 #define current_function_has_asm_statement (cfun->has_asm_statement)
 

gcc/reload1.c

@@ -743,9 +743,11 @@ reload (rtx first, int global)
   /* A function that has a nonlocal label that can reach the exit
      block via non-exceptional paths must save all call-saved
      registers.  */
-  if (current_function_calls_unwind_init
-      || (current_function_has_nonlocal_label
-	  && has_nonexceptional_receiver ()))
+  if (current_function_has_nonlocal_label
+      && has_nonexceptional_receiver ())
+    current_function_saves_all_registers = 1;
+
+  if (current_function_saves_all_registers)
     for (i = 0; i < FIRST_PSEUDO_REGISTER; i++)
       if (! call_used_regs[i] && ! fixed_regs[i] && ! LOCAL_REGNO (i))
 	df_set_regs_ever_live (i, true);