PR middle-end/18164

[pf3gnuchains/gcc-fork.git] / gcc / dwarf2out.c

diff --git a/gcc/dwarf2out.c b/gcc/dwarf2out.c
index bd26504..96351c4 100644 (file)
--- a/gcc/dwarf2out.c
+++ b/gcc/dwarf2out.c
@@ -1441,7 +1441,11 @@ static dw_cfa_location cfa_temp;
   (set (mem (postinc <reg1>:cfa_temp <const_int>)) <reg2>)
   effects: cfa.reg = <reg1>
           cfa.base_offset = -cfa_temp.offset
-          cfa_temp.offset -= mode_size(mem)  */
+          cfa_temp.offset -= mode_size(mem)
+
+  Rule 15:
+  (set <reg> {unspec, unspec_volatile})
+  effects: target-dependent  */
 
 static void
 dwarf2out_frame_debug_expr (rtx expr, const char *label)
@@ -1505,7 +1509,10 @@ dwarf2out_frame_debug_expr (rtx expr, const char *label)
            {
              /* Saving a register in a register.  */
              gcc_assert (call_used_regs [REGNO (dest)]
-                         && !fixed_regs [REGNO (dest)]);
+                         && (!fixed_regs [REGNO (dest)]
+                             /* For the SPARC and its register window.  */
+                             || DWARF_FRAME_REGNUM (REGNO (src))
+                                  == DWARF_FRAME_RETURN_COLUMN));
              queue_reg_save (label, src, dest, 0);
            }
          break;
@@ -1632,6 +1639,13 @@ dwarf2out_frame_debug_expr (rtx expr, const char *label)
        case HIGH:
          break;
 
+         /* Rule 15 */
+       case UNSPEC:
+       case UNSPEC_VOLATILE:
+         gcc_assert (targetm.dwarf_handle_frame_unspec);
+         targetm.dwarf_handle_frame_unspec (label, expr, XINT (src, 1));
+         break;
+
        default:
          gcc_unreachable ();
        }