Remove compile_only_p langhook

Use DECL_EXTERNAL instead.

gcc/cgraphbuild.cc

@@ -32,7 +32,6 @@ along with GCC; see the file COPYING3.  If not see
 #include "ipa-utils.h"
 #include "except.h"
 #include "gimplify.h"
-#include "langhooks.h"
 
 /* Context of record_reference.  */
 struct record_reference_ctx
@@ -368,8 +367,7 @@ pass_build_cgraph_edges::execute (function *fun)
     if (VAR_P (decl)
 	&& (TREE_STATIC (decl) && !DECL_EXTERNAL (decl))
 	&& !DECL_HAS_VALUE_EXPR_P (decl)
-	&& TREE_TYPE (decl) != error_mark_node
-	&& !lang_hooks.compile_only_p (decl))
+	&& TREE_TYPE (decl) != error_mark_node)
       varpool_node::finalize_decl (decl);
   record_eh_tables (node, fun);
 

gcc/cp/cp-objcp-common.h

@@ -122,8 +122,6 @@ extern tree cxx_simulate_record_decl (location_t, const char *,
 #define LANG_HOOKS_EMITS_BEGIN_STMT true
 #undef LANG_HOOKS_FINALIZE_EARLY_DEBUG
 #define LANG_HOOKS_FINALIZE_EARLY_DEBUG c_common_finalize_early_debug
-#undef LANG_HOOKS_COMPILE_ONLY_P
-#define LANG_HOOKS_COMPILE_ONLY_P consteval_only_p
 
 static const scoped_attribute_specs *const cp_objcp_attribute_table[] =
 {

gcc/cp/decl.cc

@@ -8799,7 +8799,11 @@ make_rtl_for_nonlocal_decl (tree decl, tree init, const char* asmspec)
 
   /* Don't output reflection variables.  */
   if (consteval_only_p (decl))
-    return;
+    {
+      /* Disable assemble_variable.  */
+      DECL_EXTERNAL (decl) = true;
+      return;
+    }
 
   /* We defer emission of local statics until the corresponding
      DECL_EXPR is expanded.  But with constexpr its function might never

gcc/langhooks-def.h

@@ -159,7 +159,6 @@ extern const char *lhd_get_sarif_source_language (const char *);
 #define LANG_HOOKS_GET_SUBSTRING_LOCATION lhd_get_substring_location
 #define LANG_HOOKS_FINALIZE_EARLY_DEBUG lhd_finalize_early_debug
 #define LANG_HOOKS_GET_SARIF_SOURCE_LANGUAGE lhd_get_sarif_source_language
-#define LANG_HOOKS_COMPILE_ONLY_P	hook_bool_tree_false
 
 /* Attribute hooks.  */
 #define LANG_HOOKS_ATTRIBUTE_TABLE
@@ -414,8 +413,7 @@ extern void lhd_end_section (void);
   LANG_HOOKS_RUN_LANG_SELFTESTS, \
   LANG_HOOKS_GET_SUBSTRING_LOCATION, \
   LANG_HOOKS_FINALIZE_EARLY_DEBUG,   \
-  LANG_HOOKS_GET_SARIF_SOURCE_LANGUAGE, \
-  LANG_HOOKS_COMPILE_ONLY_P \
+  LANG_HOOKS_GET_SARIF_SOURCE_LANGUAGE \
 }
 
 #endif /* GCC_LANG_HOOKS_DEF_H */

gcc/langhooks.h

@@ -674,11 +674,6 @@ struct lang_hooks
      languages.  */
   const char *(*get_sarif_source_language) (const char *filename);
 
-  /* True if this tree should only exist at compile time and not be output
-     at all.  This is true for C++ consteval-only types which should not make
-     it out of the front end.  */
-  bool (*compile_only_p) (tree);
-
   /* Whenever you add entries here, make sure you adjust langhooks-def.h
      and langhooks.cc accordingly.  */
 };

gcc/toplev.cc

@@ -352,10 +352,6 @@ wrapup_global_declaration_2 (tree decl)
       || (VAR_P (decl) && DECL_HAS_VALUE_EXPR_P (decl)))
     return false;
 
-  /* Compile-only variables are not to be written out.  */
-  if (lang_hooks.compile_only_p (decl))
-    return false;
-
   /* Don't write out static consts, unless we still need them.
 
      We also keep static consts if not optimizing (for debugging),

gcc/varpool.cc

@@ -36,7 +36,6 @@ along with GCC; see the file COPYING3.  If not see
 #include "stringpool.h"
 #include "attribs.h"
 #include "tree-pass.h"
-#include "langhooks.h"
 
 const char * const tls_model_names[]={"none", "emulated",
 				      "global-dynamic", "local-dynamic",
@@ -586,10 +585,6 @@ varpool_node::assemble_decl (void)
   if (DECL_HARD_REGISTER (decl))
     return false;
 
-  /* Compile-only variables may not be output.  */
-  if (lang_hooks.compile_only_p (decl))
-    return false;
-
   gcc_checking_assert (!TREE_ASM_WRITTEN (decl)
 		       && VAR_P (decl)
 		       && !DECL_HAS_VALUE_EXPR_P (decl));