re PR bootstrap/79052 (bootstrap-ubsan failures due to warnings)

2017-01-11  Richard Biener  <rguenther@suse.de>

	PR bootstrap/79052
	* gimple-parser.c (c_parser_gimple_switch_stmt): Add missing
	returns on parse errors.

From-SVN: r244310

gcc/c/ChangeLog

+2017-01-11  Richard Biener  <rguenther@suse.de>
+
+	PR bootstrap/79052
+	* gimple-parser.c (c_parser_gimple_switch_stmt): Add missing
+	returns on parse errors.
+
 2017-01-04  Marek Polacek  <polacek@redhat.com>
 
 	PR c++/64767

gcc/c/gimple-parser.c

@@ -1259,15 +1259,15 @@ c_parser_gimple_switch_stmt (c_parser *parser, gimple_seq *seq)
   gimple_seq switch_body = NULL;
   c_parser_consume_token (parser);
 
-  if (c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
-    {
+  if (! c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
+    return;
   cond_expr = c_parser_gimple_postfix_expression (parser);
   if (! c_parser_require (parser, CPP_CLOSE_PAREN, "expected %<)%>"))
     return;
-    }
 
-  if (c_parser_require (parser, CPP_OPEN_BRACE, "expected %<{%>"))
-    {
+  if (! c_parser_require (parser, CPP_OPEN_BRACE, "expected %<{%>"))
+    return;
+
   while (c_parser_next_token_is_not (parser, CPP_CLOSE_BRACE))
     {
       if (c_parser_next_token_is (parser, CPP_EOF))
@@ -1288,7 +1288,10 @@ c_parser_gimple_switch_stmt (c_parser *parser, gimple_seq *seq)
 		|| c_parser_peek_token (parser)->type == CPP_NUMBER)
 	      exp1 = c_parser_gimple_postfix_expression (parser);
 	    else
+	      {
 		c_parser_error (parser, "expected expression");
+		return;
+	      }
 
 	    if (c_parser_next_token_is (parser, CPP_COLON))
 	      {
@@ -1371,7 +1374,6 @@ c_parser_gimple_switch_stmt (c_parser *parser, gimple_seq *seq)
 	}
 
     }
-    }
   if (! c_parser_require (parser, CPP_CLOSE_BRACE, "expected %<}%>"))
     return;
   gimple_seq_add_stmt (seq, gimple_build_switch (cond_expr.value,