runtime: drop unused C type reflection code

    
    In particular, drop __go_type_descriptors_equal, which is no longer
    used, and will be made obsolete by CL 179598.
    
    Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/179858

From-SVN: r271823

3 files changed, 0 insertions, 170 deletions

diff --git a/libgo/runtime/go-type.h b/libgo/runtime/go-type.h
index 03806f6..1935703 100644
--- a/libgo/runtime/go-type.h
+++ b/libgo/runtime/go-type.h
@@ -153,53 +153,6 @@ struct __go_uncommon_type
   struct __go_open_array __methods;
 };
 
-/* The type descriptor for a fixed array type.  */
-
-struct __go_array_type
-{
-  /* Starts like all type descriptors.  */
-  struct __go_type_descriptor __common;
-
-  /* The element type.  */
-  struct __go_type_descriptor *__element_type;
-
-  /* The type of a slice of the same element type.  */
-  struct __go_type_descriptor *__slice_type;
-
-  /* The length of the array.  */
-  uintptr_t __len;
-};
-
-/* The type descriptor for a slice.  */
-
-struct __go_slice_type
-{
-  /* Starts like all other type descriptors.  */
-  struct __go_type_descriptor __common;
-
-  /* The element type.  */
-  struct __go_type_descriptor *__element_type;
-};
-
-/* The direction of a channel.  */
-#define CHANNEL_RECV_DIR 1
-#define CHANNEL_SEND_DIR 2
-#define CHANNEL_BOTH_DIR (CHANNEL_RECV_DIR | CHANNEL_SEND_DIR)
-
-/* The type descriptor for a channel.  */
-
-struct __go_channel_type
-{
-  /* Starts like all other type descriptors.  */
-  struct __go_type_descriptor __common;
-
-  /* The element type.  */
-  const struct __go_type_descriptor *__element_type;
-
-  /* The direction.  */
-  uintptr_t __dir;
-};
-
 /* The type descriptor for a function.  */
 
 struct __go_func_type
@@ -221,34 +174,6 @@ struct __go_func_type
   struct __go_open_array __out;
 };
 
-/* A method on an interface type.  */
-
-struct __go_interface_method
-{
-  /* The name of the method.  */
-  const struct String *__name;
-
-  /* This is NULL for an exported method, or the name of the package
-     where it lives.  */
-  const struct String *__pkg_path;
-
-  /* The real type of the method.  */
-  struct __go_type_descriptor *__type;
-};
-
-/* An interface type.  */
-
-struct __go_interface_type
-{
-  /* Starts like all other type descriptors.  */
-  struct __go_type_descriptor __common;
-
-  /* Array of __go_interface_method .  The methods are sorted in the
-     same order that they appear in the definition of the
-     interface.  */
-  struct __go_open_array __methods;
-};
-
 /* A map type.  */
 
 struct __go_map_type
@@ -301,69 +226,4 @@ struct __go_ptr_type
   const struct __go_type_descriptor *__element_type;
 };
 
-/* A field in a structure.  */
-
-struct __go_struct_field
-{
-  /* The name of the field--NULL for an anonymous field.  */
-  const struct String *__name;
-
-  /* This is NULL for an exported method, or the name of the package
-     where it lives.  */
-  const struct String *__pkg_path;
-
-  /* The type of the field.  */
-  const struct __go_type_descriptor *__type;
-
-  /* The field tag, or NULL.  */
-  const struct String *__tag;
-
-  /* The offset of the field in the struct.  */
-  uintptr_t __offset;
-};
-
-/* A struct type.  */
-
-struct __go_struct_type
-{
-  /* Starts like all other type descriptors.  */
-  struct __go_type_descriptor __common;
-
-  /* An array of struct __go_struct_field.  */
-  struct __go_open_array __fields;
-};
-
-/* Whether a type descriptor is a pointer.  */
-
-static inline _Bool
-__go_is_pointer_type (const struct __go_type_descriptor *td)
-{
-  return ((td->__code & GO_CODE_MASK) == GO_PTR
-	  || (td->__code & GO_CODE_MASK) == GO_UNSAFE_POINTER);
-}
-
-/* Call a type hash function, given the __hashfn value.  */
-
-static inline uintptr_t
-__go_call_hashfn (const FuncVal *hashfn, const void *p, uintptr_t seed,
-		  uintptr_t size)
-{
-  uintptr_t (*h) (const void *, uintptr_t, uintptr_t) = (void *) hashfn->fn;
-  return __builtin_call_with_static_chain (h (p, seed, size), hashfn);
-}
-
-/* Call a type equality function, given the __equalfn value.  */
-
-static inline _Bool
-__go_call_equalfn (const FuncVal *equalfn, const void *p1, const void *p2,
-		   uintptr_t size)
-{
-  _Bool (*e) (const void *, const void *, uintptr_t) = (void *) equalfn->fn;
-  return __builtin_call_with_static_chain (e (p1, p2, size), equalfn);
-}
-
-extern _Bool
-__go_type_descriptors_equal(const struct __go_type_descriptor*,
-			    const struct __go_type_descriptor*);
-
 #endif /* !defined(LIBGO_GO_TYPE_H) */
diff --git a/libgo/runtime/go-typedesc-equal.c b/libgo/runtime/go-typedesc-equal.c
deleted file mode 100644
index 90079f2..0000000
--- a/libgo/runtime/go-typedesc-equal.c
+++ /dev/null
@@ -1,28 +0,0 @@
-/* go-typedesc-equal.c -- return whether two type descriptors are equal.
-
-   Copyright 2009 The Go Authors. All rights reserved.
-   Use of this source code is governed by a BSD-style
-   license that can be found in the LICENSE file.  */
-
-#include "runtime.h"
-#include "go-string.h"
-#include "go-type.h"
-
-/* Compare type descriptors for equality.  This is necessary because
-   types may have different descriptors in different shared libraries.
-   Also, unnamed types may have multiple type descriptors even in a
-   single shared library.  */
-
-_Bool
-__go_type_descriptors_equal (const struct __go_type_descriptor *td1,
-			     const struct __go_type_descriptor *td2)
-{
-  if (td1 == td2)
-    return 1;
-  /* In a type switch we can get a NULL descriptor.  */
-  if (td1 == NULL || td2 == NULL)
-    return 0;
-  if (td1->__code != td2->__code || td1->__hash != td2->__hash)
-    return 0;
-  return __go_ptr_strings_equal (td1->__reflection, td2->__reflection);
-}
diff --git a/libgo/runtime/runtime.h b/libgo/runtime/runtime.h
index a421dea..0aa8ff9 100644
--- a/libgo/runtime/runtime.h
+++ b/libgo/runtime/runtime.h
@@ -78,9 +78,7 @@ typedef	struct	_panic			Panic;
 
 typedef struct	__go_ptr_type		PtrType;
 typedef struct	__go_func_type		FuncType;
-typedef struct	__go_interface_type	InterfaceType;
 typedef struct	__go_map_type		MapType;
-typedef struct	__go_channel_type	ChanType;
 
 typedef struct  tracebackg	Traceback;