[PowerPC] Add some missing PPC64 relocs

[oota-llvm.git] / include / llvm / Support / Casting.h

diff --git a/include/llvm/Support/Casting.h b/include/llvm/Support/Casting.h
index d35febbe6d80b979bcb119c2a0d993a83687d2f8..0d2d6c92fdb0adca37bdd6b15e929f7c522d89c6 100644 (file)
--- a/include/llvm/Support/Casting.h
+++ b/include/llvm/Support/Casting.h
@@ -15,6 +15,7 @@
 #ifndef LLVM_SUPPORT_CASTING_H
 #define LLVM_SUPPORT_CASTING_H
 
+#include "llvm/Support/type_traits.h"
 #include <cassert>
 
 namespace llvm {
@@ -35,22 +36,36 @@ template<typename From> struct simplify_type {
 };
 
 template<typename From> struct simplify_type<const From> {
-  typedef const From SimpleType;
-  static SimpleType &getSimplifiedValue(const From &Val) {
-    return simplify_type<From>::getSimplifiedValue(static_cast<From&>(Val));
+  typedef typename simplify_type<From>::SimpleType NonConstSimpleType;
+  typedef typename add_const_past_pointer<NonConstSimpleType>::type
+    SimpleType;
+  typedef typename add_lvalue_reference_if_not_pointer<SimpleType>::type
+    RetType;
+  static RetType getSimplifiedValue(const From& Val) {
+    return simplify_type<From>::getSimplifiedValue(const_cast<From&>(Val));
   }
 };
 
 // The core of the implementation of isa<X> is here; To and From should be
 // the names of classes.  This template can be specialized to customize the
 // implementation of isa<> without rewriting it from scratch.
-template <typename To, typename From>
+template <typename To, typename From, typename Enabler = void>
 struct isa_impl {
   static inline bool doit(const From &Val) {
     return To::classof(&Val);
   }
 };
 
+/// \brief Always allow upcasts, and perform no dynamic check for them.
+template <typename To, typename From>
+struct isa_impl<To, From,
+                typename enable_if<
+                  llvm::is_base_of<To, From>
+                >::type
+               > {
+  static inline bool doit(const From &) { return true; }
+};
+
 template <typename To, typename From> struct isa_impl_cl {
   static inline bool doit(const From &Val) {
     return isa_impl<To, From>::doit(Val);
@@ -70,6 +85,13 @@ template <typename To, typename From> struct isa_impl_cl<To, From*> {
   }
 };
 
+template <typename To, typename From> struct isa_impl_cl<To, From*const> {
+  static inline bool doit(const From *Val) {
+    assert(Val && "isa<> used on a null pointer");
+    return isa_impl<To, From>::doit(*Val);
+  }
+};
+
 template <typename To, typename From> struct isa_impl_cl<To, const From*> {
   static inline bool doit(const From *Val) {
     assert(Val && "isa<> used on a null pointer");
@@ -91,7 +113,7 @@ struct isa_impl_wrap {
   static bool doit(const From &Val) {
     return isa_impl_wrap<To, SimpleFrom,
       typename simplify_type<SimpleFrom>::SimpleType>::doit(
-                          simplify_type<From>::getSimplifiedValue(Val));
+                          simplify_type<const From>::getSimplifiedValue(Val));
   }
 };
 
@@ -110,7 +132,8 @@ struct isa_impl_wrap<To, FromTy, FromTy> {
 //
 template <class X, class Y>
 inline bool isa(const Y &Val) {
-  return isa_impl_wrap<X, Y, typename simplify_type<Y>::SimpleType>::doit(Val);
+  return isa_impl_wrap<X, const Y,
+                       typename simplify_type<const Y>::SimpleType>::doit(Val);
 }
 
 //===----------------------------------------------------------------------===//
@@ -167,7 +190,7 @@ struct cast_retty {
 //
 template<class To, class From, class SimpleFrom> struct cast_convert_val {
   // This is not a simple type, use the template to simplify it...
-  static typename cast_retty<To, From>::ret_type doit(const From &Val) {
+  static typename cast_retty<To, From>::ret_type doit(From &Val) {
     return cast_convert_val<To, SimpleFrom,
       typename simplify_type<SimpleFrom>::SimpleType>::doit(
                           simplify_type<From>::getSimplifiedValue(Val));
@@ -193,12 +216,29 @@ template<class To, class FromTy> struct cast_convert_val<To,FromTy,FromTy> {
 //  cast<Instruction>(myVal)->getParent()
 //
 template <class X, class Y>
-inline typename cast_retty<X, Y>::ret_type cast(const Y &Val) {
+inline typename cast_retty<X, const Y>::ret_type cast(const Y &Val) {
+  assert(isa<X>(Val) && "cast<Ty>() argument of incompatible type!");
+  return cast_convert_val<X, const Y,
+                        typename simplify_type<const Y>::SimpleType>::doit(Val);
+}
+
+template <class X, class Y>
+inline typename cast_retty<X, Y>::ret_type cast(Y &Val) {
   assert(isa<X>(Val) && "cast<Ty>() argument of incompatible type!");
   return cast_convert_val<X, Y,
                           typename simplify_type<Y>::SimpleType>::doit(Val);
 }
 
+template <class X, class Y>
+inline typename enable_if<
+  is_same<Y, typename simplify_type<Y>::SimpleType>,
+  typename cast_retty<X, Y*>::ret_type
+>::type cast(Y *Val) {
+  assert(isa<X>(Val) && "cast<Ty>() argument of incompatible type!");
+  return cast_convert_val<X, Y*,
+                          typename simplify_type<Y*>::SimpleType>::doit(Val);
+}
+
 // cast_or_null<X> - Functionally identical to cast, except that a null value is
 // accepted.
 //
@@ -219,8 +259,21 @@ inline typename cast_retty<X, Y*>::ret_type cast_or_null(Y *Val) {
 //
 
 template <class X, class Y>
-inline typename cast_retty<X, Y>::ret_type dyn_cast(const Y &Val) {
-  return isa<X>(Val) ? cast<X, Y>(Val) : 0;
+inline typename cast_retty<X, const Y>::ret_type dyn_cast(const Y &Val) {
+  return isa<X>(Val) ? cast<X>(Val) : 0;
+}
+
+template <class X, class Y>
+inline typename cast_retty<X, Y>::ret_type dyn_cast(Y &Val) {
+  return isa<X>(Val) ? cast<X>(Val) : 0;
+}
+
+template <class X, class Y>
+inline typename enable_if<
+  is_same<Y, typename simplify_type<Y>::SimpleType>,
+  typename cast_retty<X, Y*>::ret_type
+>::type dyn_cast(Y *Val) {
+  return isa<X>(Val) ? cast<X>(Val) : 0;
 }
 
 // dyn_cast_or_null<X> - Functionally identical to dyn_cast, except that a null