--- a/gcc/dumpfile.h	Thu Oct 25 07:37:49 2018 +0900
+++ b/gcc/dumpfile.h	Thu Feb 13 11:34:05 2020 +0900
@@ -1,5 +1,5 @@
 /* Definitions for the shared dumpfile.
-   Copyright (C) 2004-2018 Free Software Foundation, Inc.
+   Copyright (C) 2004-2020 Free Software Foundation, Inc.
 
 This file is part of GCC.
 
@@ -193,6 +193,9 @@
   /* Dumping for -fcompare-debug.  */
   TDF_COMPARE_DEBUG = (1 << 28),
 
+  /* For error.  */
+  TDF_ERROR = (1 << 26),
+
   /* All values.  */
   TDF_ALL_VALUES = (1 << 29) - 1
 };
@@ -364,8 +367,9 @@
 /* A class for identifying where in the compiler's own source
    (or a plugin) that a dump message is being emitted from.  */
 
-struct dump_impl_location_t
+class dump_impl_location_t
 {
+public:
   dump_impl_location_t (
 #if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 8)
 			const char *file = __builtin_FILE (),
@@ -385,6 +389,38 @@
   const char *m_function;
 };
 
+/* A bundle of metadata for describing a dump message:
+   (a) the dump_flags
+   (b) the source location within the compiler/plugin.
+
+   The constructors use default parameters so that (b) gets sets up
+   automatically.
+
+   Hence you can pass in e.g. MSG_NOTE, and the dump call
+   will automatically record where in GCC's source code the
+   dump was emitted from.  */
+
+class dump_metadata_t
+{
+ public:
+  dump_metadata_t (dump_flags_t dump_flags,
+		   const dump_impl_location_t &impl_location
+		     = dump_impl_location_t ())
+  : m_dump_flags (dump_flags),
+    m_impl_location (impl_location)
+  {
+  }
+
+  dump_flags_t get_dump_flags () const { return m_dump_flags; }
+
+  const dump_impl_location_t &
+  get_impl_location () const { return m_impl_location; }
+
+ private:
+  dump_flags_t m_dump_flags;
+  dump_impl_location_t m_impl_location;
+};
+
 /* A bundle of information for describing the location of a dump message:
    (a) the source location and hotness within the user's code, together with
    (b) the source location within the compiler/plugin.
@@ -469,6 +505,8 @@
 extern int opt_info_switch_p (const char *);
 extern const char *dump_flag_name (int);
 extern const kv_pair<optgroup_flags_t> optgroup_options[];
+extern dump_flags_t
+parse_dump_option (const char *, const char **);
 
 /* Global variables used to communicate with passes.  */
 extern FILE *dump_file;
@@ -521,27 +559,30 @@
    to minimize the work done for the common case where dumps
    are disabled.  */
 
-extern void dump_printf (dump_flags_t, const char *, ...)
+extern void dump_printf (const dump_metadata_t &, const char *, ...)
   ATTRIBUTE_GCC_DUMP_PRINTF (2, 3);
 
-extern void dump_printf_loc (dump_flags_t, const dump_location_t &,
+extern void dump_printf_loc (const dump_metadata_t &, const dump_user_location_t &,
 			     const char *, ...)
   ATTRIBUTE_GCC_DUMP_PRINTF (3, 0);
 extern void dump_function (int phase, tree fn);
 extern void dump_basic_block (dump_flags_t, basic_block, int);
-extern void dump_generic_expr_loc (dump_flags_t, const dump_location_t &,
+extern void dump_generic_expr_loc (const dump_metadata_t &,
+				   const dump_user_location_t &,
 				   dump_flags_t, tree);
-extern void dump_generic_expr (dump_flags_t, dump_flags_t, tree);
-extern void dump_gimple_stmt_loc (dump_flags_t, const dump_location_t &,
+extern void dump_generic_expr (const dump_metadata_t &, dump_flags_t, tree);
+extern void dump_gimple_stmt_loc (const dump_metadata_t &,
+				  const dump_user_location_t &,
 				  dump_flags_t, gimple *, int);
-extern void dump_gimple_stmt (dump_flags_t, dump_flags_t, gimple *, int);
-extern void dump_gimple_expr_loc (dump_flags_t, const dump_location_t &,
+extern void dump_gimple_stmt (const dump_metadata_t &, dump_flags_t, gimple *, int);
+extern void dump_gimple_expr_loc (const dump_metadata_t &,
+				  const dump_user_location_t &,
 				  dump_flags_t, gimple *, int);
-extern void dump_gimple_expr (dump_flags_t, dump_flags_t, gimple *, int);
-extern void dump_symtab_node (dump_flags_t, symtab_node *);
+extern void dump_gimple_expr (const dump_metadata_t &, dump_flags_t, gimple *, int);
+extern void dump_symtab_node (const dump_metadata_t &, symtab_node *);
 
 template<unsigned int N, typename C>
-void dump_dec (dump_flags_t, const poly_int<N, C> &);
+void dump_dec (const dump_metadata_t &, const poly_int<N, C> &);
 extern void dump_dec (dump_flags_t, const poly_wide_int &, signop);
 extern void dump_hex (dump_flags_t, const poly_wide_int &);
 
@@ -551,7 +592,9 @@
    leading to a dump message.  */
 
 extern unsigned int get_dump_scope_depth ();
-extern void dump_begin_scope (const char *name, const dump_location_t &loc);
+extern void dump_begin_scope (const char *name,
+			      const dump_user_location_t &user_location,
+			      const dump_impl_location_t &impl_location);
 extern void dump_end_scope ();
 
 /* Implementation detail of the AUTO_DUMP_SCOPE macro below.
@@ -563,10 +606,13 @@
 class auto_dump_scope
 {
  public:
-  auto_dump_scope (const char *name, dump_location_t loc)
+  auto_dump_scope (const char *name,
+		   const dump_user_location_t &user_location,
+		   const dump_impl_location_t &impl_location
+		   = dump_impl_location_t ())
   {
     if (dump_enabled_p ())
-      dump_begin_scope (name, loc);
+      dump_begin_scope (name, user_location, impl_location);
   }
   ~auto_dump_scope ()
   {
@@ -576,7 +622,7 @@
 };
 
 /* A macro for calling:
-     dump_begin_scope (NAME, LOC);
+     dump_begin_scope (NAME, USER_LOC);
    via an RAII object, thus printing "=== MSG ===\n" to the dumpfile etc,
    and then calling
      dump_end_scope ();
@@ -587,8 +633,8 @@
    top level implicitly default to MSG_PRIORITY_USER_FACING, whereas those
    in a nested scope implicitly default to MSG_PRIORITY_INTERNALS.  */
 
-#define AUTO_DUMP_SCOPE(NAME, LOC) \
-  auto_dump_scope scope (NAME, LOC)
+#define AUTO_DUMP_SCOPE(NAME, USER_LOC) \
+  auto_dump_scope scope (NAME, USER_LOC)
 
 extern void dump_function (int phase, tree fn);
 extern void print_combine_total_stats (void);
@@ -602,7 +648,7 @@
 /* In cfghooks.c  */
 extern void dump_bb (FILE *, basic_block, int, dump_flags_t);
 
-struct opt_pass;
+class opt_pass;
 
 namespace gcc {