From 2daa5df1b53f7ef745d724771384409f6f5df5c1 Mon Sep 17 00:00:00 2001
From: Chris Lattner <sabre@nondot.org>
Date: Sun, 6 Apr 2008 22:04:54 +0000
Subject: [PATCH] Make EnumType/RecordType classof predicates simpler and more
 efficient in some cases.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@49287 91177308-0d34-0410-b5e6-96231b3b80d8
---
 include/clang/AST/Type.h | 10 ++++++++--
 lib/AST/Type.cpp         | 12 ++++--------
 2 files changed, 12 insertions(+), 10 deletions(-)

diff --git a/include/clang/AST/Type.h b/include/clang/AST/Type.h
index b143e4cbe9..4b1f2c6b41 100644
--- a/include/clang/AST/Type.h
+++ b/include/clang/AST/Type.h
@@ -1020,7 +1020,10 @@ public:
   // the same address space, and return that.
   unsigned getAddressSpace() const { return 0; }
   
-  static bool classof(const Type *T);
+  static bool classof(const TagType *T);
+  static bool classof(const Type *T) {
+    return isa<TagType>(T) && classof(cast<TagType>(T));
+  }
   static bool classof(const RecordType *) { return true; }
 };
 
@@ -1034,7 +1037,10 @@ public:
     return reinterpret_cast<EnumDecl*>(TagType::getDecl());
   }
   
-  static bool classof(const Type *T);
+  static bool classof(const TagType *T);
+  static bool classof(const Type *T) {
+    return isa<TagType>(T) && classof(cast<TagType>(T));
+  }
   static bool classof(const EnumType *) { return true; }
 };
 
diff --git a/lib/AST/Type.cpp b/lib/AST/Type.cpp
index c06b1d9914..c8fb386804 100644
--- a/lib/AST/Type.cpp
+++ b/lib/AST/Type.cpp
@@ -739,16 +739,12 @@ QualType TypedefType::LookThroughTypedefs() const {
   }
 }
 
-bool RecordType::classof(const Type *T) {
-  if (const TagType *TT = dyn_cast<TagType>(T))
-    return isa<RecordDecl>(TT->getDecl());
-  return false;
+bool RecordType::classof(const TagType *TT) {
+  return isa<RecordDecl>(TT->getDecl());
 }
 
-bool EnumType::classof(const Type *T) {
-  if (const TagType *TT = dyn_cast<TagType>(T))
-    return isa<EnumDecl>(TT->getDecl());
-  return false;
+bool EnumType::classof(const TagType *TT) {
+  return isa<EnumDecl>(TT->getDecl());
 }
 
 
-- 
2.40.0