--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/cp/cp-cilkplus.c	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,240 @@
+/* This file is part of the Intel(R) Cilk(TM) Plus support
+   This file contains routines to handle Cilk Plus specific
+   routines for the C++ Compiler.
+   Copyright (C) 2013-2017 Free Software Foundation, Inc.
+   Contributed by Aldy Hernandez <aldyh@redhat.com>.
+
+   This file is part of GCC.
+
+   GCC is free software; you can redistribute it and/or modify it
+   under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3, or (at your option)
+   any later version.
+
+   GCC is distributed in the hope that it will be useful, but
+   WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with GCC; see the file COPYING3.  If not see
+   <http://www.gnu.org/licenses/>.  */
+
+#include "config.h"
+#include "system.h"
+#include "coretypes.h"
+#include "cp-tree.h"
+#include "tree-iterator.h"
+#include "cilk.h"
+#include "c-family/c-common.h"
+
+/* Return TRUE if T is a FUNCTION_DECL for a type-conversion operator.  */
+
+static bool
+is_conversion_operator_function_decl_p (tree t)
+{
+  if (TREE_CODE (t) != FUNCTION_DECL)
+    return false;
+
+  return DECL_CONV_FN_P (t);
+}
+
+/* Recursively traverse EXP to search for a CILK_SPAWN_STMT subtree.
+   Return the CILK_SPAWN_STMT subtree if found; otherwise, the last subtree
+   searched.  */
+
+static tree
+find_spawn (tree exp)
+{
+  /* Happens with C++ TARGET_EXPR.  */
+  if (exp == NULL_TREE)
+    return exp;
+
+  if (cilk_ignorable_spawn_rhs_op (exp))
+    return find_spawn (TREE_OPERAND (exp, 0));
+
+  switch (TREE_CODE (exp))
+    {
+    case AGGR_INIT_EXPR:
+      {
+	/* Check for initialization via a constructor call that represents
+	   implicit conversion.  */
+	if (AGGR_INIT_VIA_CTOR_P (exp) && aggr_init_expr_nargs (exp) == 2)
+	  return find_spawn (AGGR_INIT_EXPR_ARG (exp, 1));
+
+	/* Check for initialization via a call to a type-conversion
+	   operator.  */
+	tree fn = AGGR_INIT_EXPR_FN (exp);
+	if (TREE_CODE (fn) == ADDR_EXPR
+	    && is_conversion_operator_function_decl_p (TREE_OPERAND (fn, 0))
+	    && aggr_init_expr_nargs (exp) == 1)
+	  return find_spawn (AGGR_INIT_EXPR_ARG (exp, 0));
+      }
+      break;
+
+    case CALL_EXPR:
+      {
+	/* Check for a call to a type-conversion operator.  */
+	tree fndecl = TREE_OPERAND (CALL_EXPR_FN (exp), 0);
+	if (is_conversion_operator_function_decl_p (fndecl)
+	    && call_expr_nargs (exp) == 1)
+	  return find_spawn (CALL_EXPR_ARG (exp, 0));
+      }
+      break;
+
+    case TARGET_EXPR:
+      return find_spawn (TARGET_EXPR_INITIAL (exp));
+
+    case CLEANUP_POINT_EXPR:
+    case COMPOUND_EXPR:
+    case EXPR_STMT:
+      return find_spawn (TREE_OPERAND (exp, 0));
+
+    default:
+      break;
+    }
+
+    return exp;
+}
+
+/* Return true if *EXP0 is a recognized form of spawn.  Recognized forms
+   are, after conversion to void, a call expression at outer level or an
+   assignment at outer level with the right hand side being a spawned call.
+   In addition to this, it also unwraps the CILK_SPAWN_STMT cover from the
+   CALL_EXPR that is being spawned.
+
+   Note that `=' in C++ may turn into a CALL_EXPR rather than a
+   MODIFY_EXPR.  */
+
+bool
+cilk_cp_detect_spawn_and_unwrap (tree *exp0)
+{
+  tree exp = *exp0;
+
+  if (!TREE_SIDE_EFFECTS (exp))
+    return false;
+
+  /* Strip off any conversion to void.  It does not affect whether spawn
+     is supported here.  */
+  if (TREE_CODE (exp) == CONVERT_EXPR && VOID_TYPE_P (TREE_TYPE (exp)))
+    exp = TREE_OPERAND (exp, 0);
+
+  if (TREE_CODE (exp) == MODIFY_EXPR || TREE_CODE (exp) == INIT_EXPR)
+    exp = TREE_OPERAND (exp, 1);
+
+  exp = find_spawn (exp);
+  if (exp == NULL_TREE)
+    return false;
+
+  /* Now we should have a CALL_EXPR with a CILK_SPAWN_STMT wrapper around
+     it, or return false.  */
+  return cilk_recognize_spawn (exp, exp0);
+}
+
+/* Callback for cp_walk_tree to validate the body of a pragma simd loop
+   or _cilk_for loop.
+
+   This function is passed in as a function pointer to walk_tree.  *TP is
+   the current tree pointer, *WALK_SUBTREES is set to 0 by this function if
+   recursing into TP's subtrees is unnecessary. *DATA is a bool variable that
+   is set to false if an error has occurred.  */
+
+static tree
+cpp_validate_cilk_plus_loop_aux (tree *tp, int *walk_subtrees, void *data)
+{
+  bool *valid = (bool *) data;
+
+  if (!tp || !*tp)
+    return NULL_TREE;
+
+  location_t loc = EXPR_LOCATION (*tp);
+  if (TREE_CODE (*tp) == THROW_EXPR)
+    {
+      error_at (loc, "throw expressions are not allowed inside loops "
+		"marked with pragma simd");
+      *walk_subtrees = 0;
+      *valid = false;
+    }
+  else if (TREE_CODE (*tp) == TRY_BLOCK)
+    {
+      error_at (loc, "try statements are not allowed inside loops marked "
+		"with #pragma simd");
+      *valid = false;
+      *walk_subtrees = 0;
+    }
+  return NULL_TREE;
+}  
+
+
+/* Walks through all the subtrees of BODY using walk_tree to make sure
+   invalid statements/expressions are not found inside BODY.  Returns
+   false if any invalid statements are found.  */
+
+bool
+cpp_validate_cilk_plus_loop (tree body)
+{
+  bool valid = true;
+  cp_walk_tree (&body, cpp_validate_cilk_plus_loop_aux,
+		(void *) &valid, NULL);
+  return valid;
+}
+
+/* Sets the EXCEPTION bit (0x10) in the FRAME.flags field.  */
+
+static tree
+set_cilk_except_flag (tree frame)
+{
+  tree flags = cilk_dot (frame, CILK_TI_FRAME_FLAGS, 0);
+
+  flags = build2 (MODIFY_EXPR, void_type_node, flags,
+		  build2 (BIT_IOR_EXPR, TREE_TYPE (flags), flags,
+			  build_int_cst (TREE_TYPE (flags),
+					 CILK_FRAME_EXCEPTING)));
+  return flags;
+}
+
+/* Sets the frame.EXCEPT_DATA field to the head of the exception pointer.  */
+
+static tree
+set_cilk_except_data (tree frame)
+{
+  tree except_data = cilk_dot (frame, CILK_TI_FRAME_EXCEPTION, 0);
+  tree uresume_fn = builtin_decl_implicit (BUILT_IN_EH_POINTER);
+  tree ret_expr;
+  uresume_fn  = build_call_expr (uresume_fn, 1,
+				 build_int_cst (integer_type_node, 0));
+  ret_expr = build2 (MODIFY_EXPR, void_type_node, except_data, uresume_fn);
+  return ret_expr;
+}
+
+/* Installs BODY into function FNDECL with appropriate exception handling
+   code.  WD holds information of wrapper function used to pass into the
+   outlining function, cilk_outline.  */
+
+void
+cilk_install_body_with_frame_cleanup (tree fndecl, tree orig_body, void *wd)
+{
+  tree frame = make_cilk_frame (fndecl);
+  tree dtor = create_cilk_function_exit (frame, false, false);
+  add_local_decl (cfun, frame);
+
+  cfun->language = ggc_cleared_alloc<language_function> ();
+  
+  location_t loc = EXPR_LOCATION (orig_body);
+  tree list = alloc_stmt_list ();
+  DECL_SAVED_TREE (fndecl) = list;
+  tree body = alloc_stmt_list ();
+  cilk_outline (fndecl, &orig_body, (struct wrapper_data *) wd);
+  append_to_statement_list (orig_body, &body);
+  if (flag_exceptions)
+    {
+      tree except_flag = set_cilk_except_flag (frame);
+      tree except_data = set_cilk_except_data (frame);
+      tree catch_list = alloc_stmt_list ();
+      append_to_statement_list (except_flag, &catch_list);
+      append_to_statement_list (except_data, &catch_list);
+      body = create_try_catch_expr (body, catch_list);
+    }
+  append_to_statement_list (build_stmt (loc, TRY_FINALLY_EXPR, body, dtor),
+			    &list);
+}