pa reload problem

[Alan Modra]

I've applied this patch to pehc CVS to fix an hppa64 gcc problem that
Richard found when compiling modules for the 64-bit kernel.  It's not
specific to modules, but rather can affect anything requiring stubs to
call functions, eg. 64-bit userland linked to shared libs.

-- 
Linuxcare.  Support for the Revolution.

--- gcc/flow.c~	Thu Sep 28 10:37:45 2000
+++ gcc/flow.c	Mon Dec  4 09:53:44 2000
@@ -3298,7 +3298,17 @@
 	 to any pseudo before reload is a potential reference of the
 	 frame pointer.  */
       if (! reload_completed)
-	SET_REGNO_REG_SET (new_live_at_end, FRAME_POINTER_REGNUM);
+	{
+	  SET_REGNO_REG_SET (new_live_at_end, FRAME_POINTER_REGNUM);
+#ifdef PIC_OFFSET_TABLE_REGNUM
+	  /* And also for the pic register.  References to constants
+	     may require reloading via the pic register.  Assume the
+	     pic register is not in use, or will be handled by other
+	     means, if it is not fixed.  */
+	  if (fixed_regs[PIC_OFFSET_TABLE_REGNUM])
+	    SET_REGNO_REG_SET (new_live_at_end, PIC_OFFSET_TABLE_REGNUM);
+#endif
+	}
 
       /* Regs used in phi nodes are not included in
 	 global_live_at_start, since they are live only along a