Fix variable tracking for leaf functions on sparc.

	* dwarf2out.c (based_loc_descr): Perform leaf register remapping
	on 'reg'.
	* var-tracking.c (vt_add_function_parameter): Test the presence of
	HAVE_window_save properly and do not remap argument registers when
	we have a leaf function.

From-SVN: r195869

gcc/ChangeLog

+2013-02-07  David S. Miller  <davem@davemloft.net>
+
+	* dwarf2out.c (based_loc_descr): Perform leaf register remapping
+	on 'reg'.
+	* var-tracking.c (vt_add_function_parameter): Test the presence of
+	HAVE_window_save properly and do not remap argument registers when
+	we have a leaf function.
+
 2013-02-07  Uros Bizjak  <ubizjak@gmail.com>
 
 	PR bootstrap/56227

gcc/dwarf2out.c

@@ -10865,7 +10865,16 @@ based_loc_descr (rtx reg, HOST_WIDE_INT offset,
 	}
     }
 
-  regno = DWARF_FRAME_REGNUM (REGNO (reg));
+  regno = REGNO (reg);
+#ifdef LEAF_REG_REMAP
+  if (crtl->uses_only_leaf_regs)
+    {
+      int leaf_reg = LEAF_REG_REMAP (regno);
+      if (leaf_reg != -1)
+	regno = (unsigned) leaf_reg;
+    }
+#endif
+  regno = DWARF_FRAME_REGNUM (regno);
 
   if (!optimize && fde
       && (fde->drap_reg == regno || fde->vdrap_reg == regno))

gcc/var-tracking.c

@@ -9502,31 +9502,34 @@ vt_add_function_parameter (tree parm)
   /* DECL_INCOMING_RTL uses the INCOMING_REGNO of parameter registers.
      If the target machine has an explicit window save instruction, the
      actual entry value is the corresponding OUTGOING_REGNO instead.  */
-  if (REG_P (incoming)
-      && HARD_REGISTER_P (incoming)
-      && OUTGOING_REGNO (REGNO (incoming)) != REGNO (incoming))
+  if (HAVE_window_save && !crtl->uses_only_leaf_regs)
     {
-      parm_reg_t p;
-      p.incoming = incoming;
-      incoming
-	= gen_rtx_REG_offset (incoming, GET_MODE (incoming),
-			      OUTGOING_REGNO (REGNO (incoming)), 0);
-      p.outgoing = incoming;
-      vec_safe_push (windowed_parm_regs, p);
-    }
-  else if (MEM_P (incoming)
-	   && REG_P (XEXP (incoming, 0))
-	   && HARD_REGISTER_P (XEXP (incoming, 0)))
-    {
-      rtx reg = XEXP (incoming, 0);
-      if (OUTGOING_REGNO (REGNO (reg)) != REGNO (reg))
+      if (REG_P (incoming)
+	  && HARD_REGISTER_P (incoming)
+	  && OUTGOING_REGNO (REGNO (incoming)) != REGNO (incoming))
 	{
 	  parm_reg_t p;
-	  p.incoming = reg;
-	  reg = gen_raw_REG (GET_MODE (reg), OUTGOING_REGNO (REGNO (reg)));
-	  p.outgoing = reg;
+	  p.incoming = incoming;
+	  incoming
+	    = gen_rtx_REG_offset (incoming, GET_MODE (incoming),
+				  OUTGOING_REGNO (REGNO (incoming)), 0);
+	  p.outgoing = incoming;
 	  vec_safe_push (windowed_parm_regs, p);
-	  incoming = replace_equiv_address_nv (incoming, reg);
+	}
+      else if (MEM_P (incoming)
+	       && REG_P (XEXP (incoming, 0))
+	       && HARD_REGISTER_P (XEXP (incoming, 0)))
+	{
+	  rtx reg = XEXP (incoming, 0);
+	  if (OUTGOING_REGNO (REGNO (reg)) != REGNO (reg))
+	    {
+	      parm_reg_t p;
+	      p.incoming = reg;
+	      reg = gen_raw_REG (GET_MODE (reg), OUTGOING_REGNO (REGNO (reg)));
+	      p.outgoing = reg;
+	      vec_safe_push (windowed_parm_regs, p);
+	      incoming = replace_equiv_address_nv (incoming, reg);
+	    }
 	}
     }
 #endif