re PR bootstrap/81216 (bootstrap failed on i386 and powerpc64le)

	PR bootstrap/81216
	* parser.c (cp_parser_already_scoped_statement): Initialize
	LOC_AFTER_LABELS.

	* g++.dg/warn/Wmultistatement-macros-1.C: New test.

From-SVN: r249676

gcc/cp/ChangeLog

+2017-06-27  Marek Polacek  <polacek@redhat.com>
+
+	PR bootstrap/81216
+	* parser.c (cp_parser_already_scoped_statement): Initialize
+	LOC_AFTER_LABELS.
+
 2017-06-26  Jason Merrill  <jason@redhat.com>
 
 	PR c++/81215 - deduction failure with variadic TTP.

gcc/cp/parser.c

@@ -12438,7 +12438,7 @@ cp_parser_already_scoped_statement (cp_parser* parser, bool *if_p,
     {
       token_indent_info body_tinfo
 	= get_token_indent_info (cp_lexer_peek_token (parser->lexer));
-      location_t loc_after_labels;
+      location_t loc_after_labels = UNKNOWN_LOCATION;
 
       cp_parser_statement (parser, NULL_TREE, false, if_p, NULL,
 			   &loc_after_labels);
@@ -12446,7 +12446,8 @@ cp_parser_already_scoped_statement (cp_parser* parser, bool *if_p,
 	= get_token_indent_info (cp_lexer_peek_token (parser->lexer));
       warn_for_misleading_indentation (guard_tinfo, body_tinfo, next_tinfo);
 
-      if (next_tinfo.type != CPP_SEMICOLON)
+      if (loc_after_labels != UNKNOWN_LOCATION
+	  && next_tinfo.type != CPP_SEMICOLON)
 	warn_for_multistatement_macros (loc_after_labels, next_tinfo.location,
 					guard_tinfo.location,
 					guard_tinfo.keyword);

gcc/testsuite/ChangeLog

+2017-06-27  Marek Polacek  <polacek@redhat.com>
+
+	PR bootstrap/81216
+	* g++.dg/warn/Wmultistatement-macros-1.C: New test.
+
 2017-06-26  Martin Sebor  <msebor@redhat.com>
 
 	PR c++/81169

gcc/testsuite/g++.dg/warn/Wmultistatement-macros-1.C

+// PR bootstrap/81216
+// { dg-options "-Wmultistatement-macros" }
+// { dg-do compile }
+
+template <typename A, typename B>
+static bool
+equal (A a, A b, B c)
+{
+  for (; a != b; ++a, (void)++c)
+    if (!(*a == *c))
+      return false;
+  return true;
+}