diagnostics: move diagnostic_info to its own header

No functional change intended.

gcc/ChangeLog:
	* diagnostic.h (struct diagnostic_info): Move to
	diagnostics/diagnostic-info.h as diagnostics::diagnostic_info.
	Add typedef bringing it back into root namespace, for now.
	* diagnostics/diagnostic-info.h: New file, based on the above.
	* langhooks-def.h: Update for diagnostic_info moving into
	namespace diagnostics.
	* langhooks.h: Likewise.

gcc/jit/ChangeLog:
	* jit-playback.cc: Update for diagnostic_info moving into
	namespace diagnostics.
	* jit-playback.h: Likewise.

Signed-off-by: David Malcolm <dmalcolm@redhat.com>

6 files changed, 84 insertions, 51 deletions

diff --git a/gcc/diagnostic.h b/gcc/diagnostic.h
index 3bf51aa..4388655 100644
--- a/gcc/diagnostic.h
+++ b/gcc/diagnostic.h
@@ -152,50 +152,8 @@ enum diagnostic_text_art_charset
   DIAGNOSTICS_TEXT_ART_CHARSET_EMOJI
 };
 
-/* A diagnostic is described by the MESSAGE to send, the FILE and LINE of
-   its context and its KIND (ice, error, warning, note, ...)  See complete
-   list in diagnostic.def.  */
-struct diagnostic_info
-{
-  diagnostic_info ()
-  : m_message (),
-    m_richloc (),
-    m_metadata (),
-    m_x_data (),
-    m_kind (),
-    m_option_id (),
-    m_iinfo ()
-  { }
-
-  /* Text to be formatted.  */
-  text_info m_message;
-
-  /* The location at which the diagnostic is to be reported.  */
-  rich_location *m_richloc;
-
-  /* An optional bundle of metadata associated with the diagnostic
-     (or NULL).  */
-  const diagnostics::metadata *m_metadata;
-
-  /* Auxiliary data for client.  */
-  void *m_x_data;
-  /* The kind of diagnostic it is about.  */
-  diagnostic_t m_kind;
-  /* Which OPT_* directly controls this diagnostic.  */
-  diagnostic_option_id m_option_id;
-
-  /* Inlining context containing locations for each call site along
-     the inlining stack.  */
-  struct inlining_info
-  {
-    /* Locations along the inlining stack.  */
-    auto_vec<location_t, 8> m_ilocs;
-    /* The abstract origin of the location.  */
-    void *m_ao;
-    /* Set if every M_ILOCS element is in a system header.  */
-    bool m_allsyslocs;
-  } m_iinfo;
-};
+#include "diagnostics/diagnostic-info.h"
+typedef diagnostics::diagnostic_info diagnostic_info;
 
 /*  Forward declarations.  */
 class diagnostic_location_print_policy;
diff --git a/gcc/diagnostics/diagnostic-info.h b/gcc/diagnostics/diagnostic-info.h
new file mode 100644
index 0000000..f8107b1
--- /dev/null
+++ b/gcc/diagnostics/diagnostic-info.h
@@ -0,0 +1,75 @@
+/* Various declarations for language-independent diagnostics subroutines.
+   Copyright (C) 2000-2025 Free Software Foundation, Inc.
+
+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/>.  */
+
+#ifndef GCC_DIAGNOSTICS_DIAGNOSTIC_INFO_H
+#define GCC_DIAGNOSTICS_DIAGNOSTIC_INFO_H
+
+namespace diagnostics {
+
+class metadata;
+
+/* A diagnostic is described by the MESSAGE to send, the FILE and LINE of
+   its context and its KIND (ice, error, warning, note, ...)  See complete
+   list in diagnostic.def.  */
+
+struct diagnostic_info
+{
+  diagnostic_info ()
+  : m_message (),
+    m_richloc (),
+    m_metadata (),
+    m_x_data (),
+    m_kind (),
+    m_option_id (),
+    m_iinfo ()
+  { }
+
+  /* Text to be formatted.  */
+  text_info m_message;
+
+  /* The location at which the diagnostic is to be reported.  */
+  rich_location *m_richloc;
+
+  /* An optional bundle of metadata associated with the diagnostic
+     (or NULL).  */
+  const metadata *m_metadata;
+
+  /* Auxiliary data for client.  */
+  void *m_x_data;
+  /* The kind of diagnostic it is about.  */
+  diagnostic_t m_kind;
+  /* Which OPT_* directly controls this diagnostic.  */
+  diagnostic_option_id m_option_id;
+
+  /* Inlining context containing locations for each call site along
+     the inlining stack.  */
+  struct inlining_info
+  {
+    /* Locations along the inlining stack.  */
+    auto_vec<location_t, 8> m_ilocs;
+    /* The abstract origin of the location.  */
+    void *m_ao;
+    /* Set if every M_ILOCS element is in a system header.  */
+    bool m_allsyslocs;
+  } m_iinfo;
+};
+
+} // namespace diagnostics
+
+#endif /* ! GCC_DIAGNOSTICS_DIAGNOSTIC_INFO_H */
diff --git a/gcc/jit/jit-playback.cc b/gcc/jit/jit-playback.cc
index 6946f10..4473d8b 100644
--- a/gcc/jit/jit-playback.cc
+++ b/gcc/jit/jit-playback.cc
@@ -3892,7 +3892,7 @@ add_error_va (location *loc, const char *fmt, va_list ap)
 void
 playback::context::
 add_diagnostic (const char *text,
-		const diagnostic_info &diagnostic)
+		const diagnostics::diagnostic_info &diagnostic)
 {
   /* Get location information (if any) from the diagnostic.
      The recording::context::add_error[_va] methods require a
diff --git a/gcc/jit/jit-playback.h b/gcc/jit/jit-playback.h
index e9a5c38..1d11502 100644
--- a/gcc/jit/jit-playback.h
+++ b/gcc/jit/jit-playback.h
@@ -31,7 +31,7 @@ along with GCC; see the file COPYING3.  If not see
 #include "jit-recording.h"
 
 class diagnostic_context;
-struct diagnostic_info;
+namespace diagnostics { struct diagnostic_info; }
 
 namespace gcc {
 
@@ -298,7 +298,7 @@ public:
 
   void
   add_diagnostic (const char *text,
-		  const diagnostic_info &diagnostic);
+		  const diagnostics::diagnostic_info &diagnostic);
 
   void
   set_tree_location (tree t, location *loc);
diff --git a/gcc/langhooks-def.h b/gcc/langhooks-def.h
index e03f00a..c8a7a62 100644
--- a/gcc/langhooks-def.h
+++ b/gcc/langhooks-def.h
@@ -23,7 +23,7 @@ along with GCC; see the file COPYING3.  If not see
 
 #include "hooks.h"
 
-struct diagnostic_info;
+namespace diagnostics { struct diagnostic_info; }
 class substring_loc;
 
 /* Note to creators of new hooks:
@@ -51,7 +51,7 @@ extern const char *lhd_dwarf_name (tree, int);
 extern int lhd_types_compatible_p (tree, tree);
 extern void lhd_print_error_function (diagnostics::text_sink &,
 				      const char *,
-				      const struct diagnostic_info *);
+				      const diagnostics::diagnostic_info *);
 extern void lhd_set_decl_assembler_name (tree decl);
 extern void lhd_overwrite_decl_assembler_name (tree decl, tree name);
 extern bool lhd_warn_unused_global_decl (const_tree);
diff --git a/gcc/langhooks.h b/gcc/langhooks.h
index 7433170..93df485 100644
--- a/gcc/langhooks.h
+++ b/gcc/langhooks.h
@@ -22,7 +22,7 @@ along with GCC; see the file COPYING3.  If not see
 
 /* FIXME: This file should be #include-d after tree.h (for enum tree_code).  */
 
-struct diagnostic_info;
+namespace diagnostics { struct diagnostic_info; }
 
 struct gimplify_omp_ctx;
 
@@ -549,7 +549,7 @@ struct lang_hooks
      for textual diagnostic output.  */
   void (*print_error_function) (diagnostics::text_sink &,
 				const char *,
-				const struct diagnostic_info *);
+				const diagnostics::diagnostic_info *);
 
   /* Convert a character from the host's to the target's character
      set.  The character should be in what C calls the "basic source