[gcc r12-6972] tree: move tree_vec_map_cache_hasher into header

[Jason Merrill <jason@gcc.gnu.org>]

https://gcc.gnu.org/g:b649071d4b3490aa43c6c2212312ace304c9ff1c

commit r12-6972-gb649071d4b3490aa43c6c2212312ace304c9ff1c
Author: Jason Merrill <jason@redhat.com>
Date:   Thu Jan 27 10:53:07 2022 -0500

    tree: move tree_vec_map_cache_hasher into header
    
    gcc/ChangeLog:
    
            * tree.h (struct tree_vec_map_cache_hasher): Move from...
            * tree.cc (struct tree_vec_map_cache_hasher): ...here.

Diff:
---
 gcc/tree.h  | 17 +++++++++++++++++
 gcc/tree.cc | 17 -----------------
 2 files changed, 17 insertions(+), 17 deletions(-)

diff --git a/gcc/tree.h b/gcc/tree.h
index 4c01d94244e..e2157d66d6c 100644
--- a/gcc/tree.h
+++ b/gcc/tree.h
@@ -5559,6 +5559,23 @@ struct tree_decl_map_cache_hasher : ggc_cache_ptr_hash<tree_decl_map>
 #define tree_vec_map_hash tree_decl_map_hash
 #define tree_vec_map_marked_p tree_map_base_marked_p
 
+struct tree_vec_map_cache_hasher : ggc_cache_ptr_hash<tree_vec_map>
+{
+  static hashval_t hash (tree_vec_map *m) { return DECL_UID (m->base.from); }
+
+  static bool
+  equal (tree_vec_map *a, tree_vec_map *b)
+  {
+    return a->base.from == b->base.from;
+  }
+
+  static int
+  keep_cache_entry (tree_vec_map *&m)
+  {
+    return ggc_marked_p (m->base.from);
+  }
+};
+
 /* Hasher for tree decls.  Pointer equality is enough here, but the DECL_UID
    is a better hash than the pointer value and gives a predictable traversal
    order.  Additionally it can be used across PCH save/restore.  */
diff --git a/gcc/tree.cc b/gcc/tree.cc
index 9d445b2740f..7ce4f242751 100644
--- a/gcc/tree.cc
+++ b/gcc/tree.cc
@@ -242,23 +242,6 @@ static GTY ((cache))
 static GTY ((cache))
      hash_table<tree_decl_map_cache_hasher> *value_expr_for_decl;
 
-struct tree_vec_map_cache_hasher : ggc_cache_ptr_hash<tree_vec_map>
-{
-  static hashval_t hash (tree_vec_map *m) { return DECL_UID (m->base.from); }
-
-  static bool
-  equal (tree_vec_map *a, tree_vec_map *b)
-  {
-    return a->base.from == b->base.from;
-  }
-
-  static int
-  keep_cache_entry (tree_vec_map *&m)
-  {
-    return ggc_marked_p (m->base.from);
-  }
-};
-
 static GTY ((cache))
      hash_table<tree_vec_map_cache_hasher> *debug_args_for_decl;