* dwarf2out.c (mem_loc_descriptor): Handle IF_THEN_ELSE.

From-SVN: r164762

gcc/ChangeLog

 2010-09-30  Jakub Jelinek  <jakub@redhat.com>
 
+	* dwarf2out.c (mem_loc_descriptor): Handle IF_THEN_ELSE.
+
 	PR tree-optimization/31261
 	* fold-const.c (fold_binary): Optimize ((A & N) + B) & M
 	for constants M and N, M == (1LL << cst) - 1 && (N & M) == M.

gcc/dwarf2out.c

@@ -14162,8 +14162,32 @@ mem_loc_descriptor (rtx rtl, enum machine_mode mode,
 	}
       break;
 
-    case COMPARE:
     case IF_THEN_ELSE:
+      {
+	dw_loc_descr_ref op2, bra_node, drop_node;
+	op0 = mem_loc_descriptor (XEXP (rtl, 0), mode,
+				  VAR_INIT_STATUS_INITIALIZED);
+	op1 = mem_loc_descriptor (XEXP (rtl, 1), mode,
+				  VAR_INIT_STATUS_INITIALIZED);
+	op2 = mem_loc_descriptor (XEXP (rtl, 2), mode,
+				  VAR_INIT_STATUS_INITIALIZED);
+	if (op0 == NULL || op1 == NULL || op2 == NULL)
+	  break;
+
+	mem_loc_result = op1;
+	add_loc_descr (&mem_loc_result, op2);
+	add_loc_descr (&mem_loc_result, op0);
+	bra_node = new_loc_descr (DW_OP_bra, 0, 0);
+	add_loc_descr (&mem_loc_result, bra_node);
+	add_loc_descr (&mem_loc_result, new_loc_descr (DW_OP_swap, 0, 0));
+	drop_node = new_loc_descr (DW_OP_drop, 0, 0);
+	add_loc_descr (&mem_loc_result, drop_node);
+	bra_node->dw_loc_oprnd1.val_class = dw_val_class_loc;
+	bra_node->dw_loc_oprnd1.v.val_loc = drop_node;
+      }
+      break;
+
+    case COMPARE:
     case ROTATE:
     case ROTATERT:
     case TRUNCATE: