GIMPLEFE: handle invalid __MEM

gcc/c/

	PR testsuite/80580
	* gimple-parser.c (c_parser_gimple_postfix_expression): Handle
	incorrect __MEM syntax.

gcc/testsuite/

	PR testsuite/80580
	* gcc.dg/gimplefe-error-5.c: New test.

From-SVN: r247900

gcc/c/ChangeLog

 2017-05-11  Mikhail Maltsev  <maltsevm@gmail.com>
 
 	PR testsuite/80580
+	* gimple-parser.c (c_parser_gimple_postfix_expression): Handle
+	incorrect __MEM syntax.
+
+2017-05-11  Mikhail Maltsev  <maltsevm@gmail.com>
+
+	PR testsuite/80580
 	* gimple-parser.c (c_parser_gimple_unary_expression): Check argument
 	type of unary '*'.
 

gcc/c/gimple-parser.c

@@ -804,6 +804,16 @@ c_parser_gimple_postfix_expression (c_parser *parser)
 			}
 		    }
 		  ptr = c_parser_gimple_unary_expression (parser);
+		  if (ptr.value == error_mark_node
+		      || ! POINTER_TYPE_P (TREE_TYPE (ptr.value)))
+		    {
+		      if (ptr.value != error_mark_node)
+			error_at (ptr.get_start (),
+				  "invalid type of %<__MEM%> operand");
+		      c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
+						 "expected %<)%>");
+		      return expr;
+		    }
 		  if (! alias_type)
 		    alias_type = TREE_TYPE (ptr.value);
 		  /* Optional constant offset.  */

gcc/testsuite/ChangeLog

 2017-05-11  Mikhail Maltsev  <maltsevm@gmail.com>
 
 	PR testsuite/80580
+	* gcc.dg/gimplefe-error-5.c: New test.
+
+2017-05-11  Mikhail Maltsev  <maltsevm@gmail.com>
+
+	PR testsuite/80580
 	* gcc.dg/gimplefe-error-4.c: New test.
 
 2017-05-10  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>

gcc/testsuite/gcc.dg/gimplefe-error-5.c

+/* { dg-do compile } */
+/* { dg-options "-fgimple" } */
+
+__GIMPLE() void a()
+{
+  __MEM() = 0; /* { dg-error "expected .<." } */
+}