re PR c++/78089 (__builtin_shuffle parsing bug)

	PR c++/78089
	* parser.c (cp_parser_postfix_expression): Replace return statement in
	the first switch with setting postfix_expression to the return
	expression and break;.

	* c-c++-common/builtin-shuffle-1.c: New test.
	* g++.dg/cpp0x/addressof3.C: New test.

From-SVN: r241710

diff --git a/gcc/cp/ChangeLog b/gcc/cp/ChangeLog
index 39da99e..b657f62 100644 (file)
--- a/gcc/cp/ChangeLog
+++ b/gcc/cp/ChangeLog
@@ -1,5 +1,10 @@
 2016-10-31  Jakub Jelinek  <jakub@redhat.com>
 
+       PR c++/78089
+       * parser.c (cp_parser_postfix_expression): Replace return statement in
+       the first switch with setting postfix_expression to the return
+       expression and break;.
+
        PR c++/77886
        * g++.dg/warn/Wimplicit-fallthrough-2.C: New test.
 

diff --git a/gcc/cp/parser.c b/gcc/cp/parser.c
index 53eafa7..e443648 100644 (file)
--- a/gcc/cp/parser.c
+++ b/gcc/cp/parser.c
@@ -6441,7 +6441,10 @@ cp_parser_postfix_expression (cp_parser *parser, bool address_p, bool cast_p,
           can be used in constant-expressions.  */
        if (!cast_valid_in_integral_constant_expression_p (type)
            && cp_parser_non_integral_constant_expression (parser, NIC_CAST))
-         return error_mark_node;
+         {
+           postfix_expression = error_mark_node;
+           break;
+         }
 
        switch (keyword)
          {
@@ -6521,7 +6524,7 @@ cp_parser_postfix_expression (cp_parser *parser, bool address_p, bool cast_p,
        parser->type_definition_forbidden_message = saved_message;
        /* `typeid' may not appear in an integral constant expression.  */
        if (cp_parser_non_integral_constant_expression (parser, NIC_TYPEID))
-         return error_mark_node;
+         postfix_expression = error_mark_node;
       }
       break;
 
@@ -6615,7 +6618,10 @@ cp_parser_postfix_expression (cp_parser *parser, bool address_p, bool cast_p,
                    /*cast_p=*/false, /*allow_expansion_p=*/true,
                    /*non_constant_p=*/NULL);
        if (vec == NULL)
-         return error_mark_node;
+         {
+           postfix_expression = error_mark_node;
+           break;
+         }
 
        FOR_EACH_VEC_ELT (*vec, i, p)
          mark_exp_read (p);
@@ -6624,10 +6630,15 @@ cp_parser_postfix_expression (cp_parser *parser, bool address_p, bool cast_p,
          {
          case RID_ADDRESSOF:
            if (vec->length () == 1)
-             return cp_build_addressof (loc, (*vec)[0], tf_warning_or_error);
-           error_at (loc, "wrong number of arguments to "
-                          "%<__builtin_addressof%>");
-           return error_mark_node;
+             postfix_expression
+               = cp_build_addressof (loc, (*vec)[0], tf_warning_or_error);
+           else
+             {
+               error_at (loc, "wrong number of arguments to "
+                              "%<__builtin_addressof%>");
+               postfix_expression = error_mark_node;
+             }
+           break;
 
          case RID_BUILTIN_LAUNDER:
            if (vec->length () == 1)
@@ -6643,14 +6654,20 @@ cp_parser_postfix_expression (cp_parser *parser, bool address_p, bool cast_p,
 
          case RID_BUILTIN_SHUFFLE:
            if (vec->length () == 2)
-             return build_x_vec_perm_expr (loc, (*vec)[0], NULL_TREE,
-                                           (*vec)[1], tf_warning_or_error);
+             postfix_expression
+               = build_x_vec_perm_expr (loc, (*vec)[0], NULL_TREE,
+                                        (*vec)[1], tf_warning_or_error);
            else if (vec->length () == 3)
-             return build_x_vec_perm_expr (loc, (*vec)[0], (*vec)[1],
-                                           (*vec)[2], tf_warning_or_error);
-           error_at (loc, "wrong number of arguments to "
-                          "%<__builtin_shuffle%>");
-           return error_mark_node;
+             postfix_expression
+               = build_x_vec_perm_expr (loc, (*vec)[0], (*vec)[1],
+                                        (*vec)[2], tf_warning_or_error);
+           else
+             {
+               error_at (loc, "wrong number of arguments to "
+                              "%<__builtin_shuffle%>");
+               postfix_expression = error_mark_node;
+             }
+           break;
 
          default:
            gcc_unreachable ();

diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 58d5ce2..0d1a013 100644 (file)
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,9 @@
+2016-10-31  Jakub Jelinek  <jakub@redhat.com>
+
+       PR c++/78089
+       * c-c++-common/builtin-shuffle-1.c: New test.
+       * g++.dg/cpp0x/addressof3.C: New test.
+
 2016-10-31  Ville Voutilainen  <ville.voutilainen@gmail.com>
 
        Add tests for a const member and a reference member for launder.

diff --git a/gcc/testsuite/c-c++-common/builtin-shuffle-1.c b/gcc/testsuite/c-c++-common/builtin-shuffle-1.c
new file mode 100644 (file)
index 0000000..30fd690
--- /dev/null
+++ b/gcc/testsuite/c-c++-common/builtin-shuffle-1.c
@@ -0,0 +1,22 @@
+/* PR c++/78089 */
+/* { dg-do run } */
+
+typedef int V __attribute__((vector_size (16)));
+V a, b, c;
+
+int
+foo ()
+{
+  return __builtin_shuffle (a, b, c)[3];
+}
+
+int
+main ()
+{
+  a = (V) { 1, 2, 3, 4 };
+  b = (V) { 5, 6, 7, 8 };
+  c = (V) { 7, 2, 5, 6 };
+  if (foo () != 7)
+    __builtin_abort ();
+  return 0;
+}

diff --git a/gcc/testsuite/g++.dg/cpp0x/addressof3.C b/gcc/testsuite/g++.dg/cpp0x/addressof3.C
new file mode 100644 (file)
index 0000000..fa51790
--- /dev/null
+++ b/gcc/testsuite/g++.dg/cpp0x/addressof3.C
@@ -0,0 +1,9 @@
+// { dg-do compile }
+
+struct S { int foo (); int s; };
+int a[10];
+int b;
+S c;
+int d = __builtin_addressof (a)[0][0];
+int e = __builtin_addressof (b)[0];
+int f = __builtin_addressof (c)->foo ();