Move code_helper to tree.h

tree.h already contains combined_fn handling at the top and moving
code_helper away from gimple-match.h makes improving the gimple_build
API easier.

2022-05-16  Richard Biener  <rguenther@suse.de>

	* gimple-match.h (code_helper): Move class ...
	* tree.h (code_helper): ... here.

1 files changed, 49 insertions, 0 deletions

diff --git a/gcc/tree.h b/gcc/tree.h
index 5f4b03d..c92c5bf 100644
--- a/gcc/tree.h
+++ b/gcc/tree.h
@@ -75,6 +75,55 @@ as_internal_fn (combined_fn code)
   return internal_fn (int (code) - int (END_BUILTINS));
 }
 
+/* Helper to transparently allow tree codes and builtin function codes
+   exist in one storage entity.  */
+class code_helper
+{
+public:
+  code_helper () {}
+  code_helper (tree_code code) : rep ((int) code) {}
+  code_helper (combined_fn fn) : rep (-(int) fn) {}
+  code_helper (internal_fn fn) : rep (-(int) as_combined_fn (fn)) {}
+  explicit operator tree_code () const { return (tree_code) rep; }
+  explicit operator combined_fn () const { return (combined_fn) -rep; }
+  explicit operator internal_fn () const;
+  explicit operator built_in_function () const;
+  bool is_tree_code () const { return rep > 0; }
+  bool is_fn_code () const { return rep < 0; }
+  bool is_internal_fn () const;
+  bool is_builtin_fn () const;
+  int get_rep () const { return rep; }
+  bool operator== (const code_helper &other) { return rep == other.rep; }
+  bool operator!= (const code_helper &other) { return rep != other.rep; }
+  bool operator== (tree_code c) { return rep == code_helper (c).rep; }
+  bool operator!= (tree_code c) { return rep != code_helper (c).rep; }
+
+private:
+  int rep;
+};
+
+inline code_helper::operator internal_fn () const
+{
+  return as_internal_fn (combined_fn (*this));
+}
+
+inline code_helper::operator built_in_function () const
+{
+  return as_builtin_fn (combined_fn (*this));
+}
+
+inline bool
+code_helper::is_internal_fn () const
+{
+  return is_fn_code () && internal_fn_p (combined_fn (*this));
+}
+
+inline bool
+code_helper::is_builtin_fn () const
+{
+  return is_fn_code () && builtin_fn_p (combined_fn (*this));
+}
+
 /* Macros for initializing `tree_contains_struct'.  */
 #define MARK_TS_BASE(C)					\
   (tree_contains_struct[C][TS_BASE] = true)