m68k.c (m68k_save_reg): Save the PIC register in functions that need a constant pool.

gcc/
	* config/m68k/m68k.c (m68k_save_reg): Save the PIC register in
	functions that need a constant pool.

From-SVN: r122610

gcc/ChangeLog

 2007-03-06  Richard Sandiford  <richard@codesourcery.com>
 
+	* config/m68k/m68k.c (m68k_save_reg): Save the PIC register in
+	functions that need a constant pool.
+
+2007-03-06  Richard Sandiford  <richard@codesourcery.com>
+
 	PR target/28181
 	* config/m68k/m68k-protos.h (m68k_secondary_reload_class): Declare.
 	(m68k_preferred_reload_class): Likewise.

gcc/config/m68k/m68k.c

@@ -749,6 +749,13 @@ m68k_save_reg (unsigned int regno, bool interrupt_handler)
     {
       if (current_function_uses_pic_offset_table)
 	return true;
+      /* Reload may introduce constant pool references into a function
+	 that thitherto didn't need a PIC register.  Note that the test
+	 above will not catch that case because we will only set
+	 current_function_uses_pic_offset_table when emitting
+	 the address reloads.  */
+      if (current_function_uses_const_pool)
+	return true;
     }
 
   if (current_function_calls_eh_return)