varasm.c (set_implicit_section): New function.

	* varasm.c (set_implicit_section): New function.
	(resolve_unique_section): Use it to set implicit section
	for aliases, too.
	(get_named_text_section): Use symtab_get_node (decl)->implicit_section
	(default_function_section): Likewise.
	(decl_binds_to_current_def_p): Constify argument.
	* varasm.h (decl_binds_to_current_def_p): Update prototype.
	* asan.c (asan_protect_global): Use symtab_get_node (decl)->implicit_section.
	* symtab.c (dump_symtab_base): Dump implicit sections.
	(verify_symtab_base): Verify sanity of sectoins and comdats.
	(symtab_resolve_alias): Alias share the section of its target.
	(set_section_1): New function.
	(symtab_node::set_section): Move here, recurse to aliases.
	(verify_symtab): Check for duplicated symtab lists.
	* tree-core.h (implicit_section_name_p): Remove.
	* tree-vect-data-refs.c: Include varasm.h.
	(vect_can_force_dr_alignment_p): Fix conditional on when
	decl bints to current definition; use
	symtab_get_node (decl)->implicit_section.
	* cgraph.c (cgraph_make_node_local_1): Fix section set.
	* cgraph.h (struct symtab_node): Add implicit_section.
	(set_section): Rename to ...
	(set_section_for_node): ... this one.
	(set_section): Declare.
	* tree.h (DECL_HAS_IMPLICIT_SECTION_NAME_P): Remove.
	* lto-cgraph.c (lto_output_node, lto_output_varpool_node,
	input_overwrite_node, input_varpool_node): Stream implicit_section.
	* ipa.c (symtab_remove_unreachable_nodes): Do not check symtab before
	removal; it will fail in LTO.
	
	* vtable-class-hierarchy.c: Use symtab_get_node (var_decl)->implicit_section.
	* optimize.c (cdtor_comdat_group): Fix handling of aliases.
	(maybe_clone_body): Move symbol across comdat groups.
	* method.c (use_thunk): Copy implicit section flag.

	* go/go-gcc.cc (Gcc_backend::global_variable_set_init): Use
	symtab_get_node(var_decl)->implicit_section.

	* lto.c (read_cgraph_and_symbols): Remove unreachable symbols.
	(do_whole_program_analysis): Use verify_symtab.

From-SVN: r211434

1 files changed, 22 insertions, 4 deletions

diff --git a/gcc/cgraph.h b/gcc/cgraph.h
index 882f1e8..dc286d9 100644
--- a/gcc/cgraph.h
+++ b/gcc/cgraph.h
@@ -93,6 +93,9 @@ public:
   unsigned forced_by_abi : 1;
   /* True when the name is known to be unique and thus it does not need mangling.  */
   unsigned unique_name : 1;
+  /* Specify whether the section was set by user or by
+     compiler via -ffunction-sections.  */
+  unsigned implicit_section : 1;
   /* True when body and other characteristics have been removed by
      symtab_remove_unreachable_nodes. */
   unsigned body_removed : 1;
@@ -162,17 +165,29 @@ public:
       comdat_group_ = group;
     }
 
-  /* Return section.  */
-  tree get_section ()
+  /* Return section as STRING_CST.  */
+  tree get_section_name ()
     {
       return section_;
     }
 
-  /* Set section.  */
-  void set_section (tree section)
+  /* Return section as string.  */
+  const char * get_section ()
+    {
+      if (!section_)
+	return NULL;
+      return TREE_STRING_POINTER (section_);
+    }
+
+  /* Set section, do not recurse into aliases.
+     When one wants to change section of symbol and its aliases,
+     use set_section  */
+  void set_section_for_node (tree section)
     {
       gcc_checking_assert (!section || TREE_CODE (section) == STRING_CST);
       section_ = section;
+      if (!section)
+	implicit_section = false;
     }
 
   /* Vectors of referring and referenced entities.  */
@@ -193,6 +208,9 @@ public:
 
   /* Section name. Again can be private, if allowed.  */
   tree section_;
+
+  /* Set section for symbol and its aliases.  */
+  void set_section (tree section);
 };
 
 enum availability