add a helper method to sys::Path for clang, patch by

[oota-llvm.git] / include / llvm / BasicBlock.h

diff --git a/include/llvm/BasicBlock.h b/include/llvm/BasicBlock.h
index 0a22f44b985bc3420543b61d758084b90ae7c571..6614a93883080a582839b7de8c0ef59c01164b6e 100644 (file)
--- a/include/llvm/BasicBlock.h
+++ b/include/llvm/BasicBlock.h
@@ -2,13 +2,13 @@
 //
 //                     The LLVM Compiler Infrastructure
 //
-// This file was developed by the LLVM research group and is distributed under
-// the University of Illinois Open Source License. See LICENSE.TXT for details.
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 //
-//
 // This file contains the declaration of the BasicBlock class.
+//
 //===----------------------------------------------------------------------===//
 
 #ifndef LLVM_BASICBLOCK_H
@@ -16,7 +16,8 @@
 
 #include "llvm/Instruction.h"
 #include "llvm/SymbolTableListTraits.h"
-#include "llvm/ADT/ilist"
+#include "llvm/ADT/ilist.h"
+#include "llvm/Support/DataTypes.h"
 
 namespace llvm {
 
@@ -48,33 +49,38 @@ template<> struct ilist_traits<Instruction>
 /// modifying a program. However, the verifier will ensure that basic blocks
 /// are "well formed".
 /// @brief LLVM Basic Block Representation
-class BasicBlock : public Value {       // Basic blocks are data objects also
+class BasicBlock : public Value, // Basic blocks are data objects also
+                   public ilist_node<BasicBlock> {
 public:
   typedef iplist<Instruction> InstListType;
 private :
   InstListType InstList;
-  BasicBlock *Prev, *Next; // Next and Prev links for our intrusive linked list
   Function *Parent;
 
   void setParent(Function *parent);
-  void setNext(BasicBlock *N) { Next = N; }
-  void setPrev(BasicBlock *N) { Prev = N; }
   friend class SymbolTableListTraits<BasicBlock, Function>;
 
   BasicBlock(const BasicBlock &);     // Do not implement
   void operator=(const BasicBlock &); // Do not implement
 
-public:
-  /// Instruction iterators...
-  typedef InstListType::iterator                              iterator;
-  typedef InstListType::const_iterator                  const_iterator;
-
   /// BasicBlock ctor - If the function parameter is specified, the basic block
   /// is automatically inserted at either the end of the function (if
   /// InsertBefore is null), or before the specified basic block.
   ///
   explicit BasicBlock(const std::string &Name = "", Function *Parent = 0,
                       BasicBlock *InsertBefore = 0);
+public:
+  /// Instruction iterators...
+  typedef InstListType::iterator                              iterator;
+  typedef InstListType::const_iterator                  const_iterator;
+
+  /// Create - Creates a new BasicBlock. If the Parent parameter is specified,
+  /// the basic block is automatically inserted at either the end of the
+  /// function (if InsertBefore is 0), or before the specified basic block.
+  static BasicBlock *Create(const std::string &Name = "", Function *Parent = 0,
+                            BasicBlock *InsertBefore = 0) {
+    return new BasicBlock(Name, Parent, InsertBefore);
+  }
   ~BasicBlock();
 
   /// getParent - Return the enclosing method, or null if none
@@ -82,12 +88,6 @@ public:
   const Function *getParent() const { return Parent; }
         Function *getParent()       { return Parent; }
 
-  // getNext/Prev - Return the next or previous basic block in the list.
-        BasicBlock *getNext()       { return Next; }
-  const BasicBlock *getNext() const { return Next; }
-        BasicBlock *getPrev()       { return Prev; }
-  const BasicBlock *getPrev() const { return Prev; }
-
   /// use_back - Specialize the methods defined in Value, as we know that an
   /// BasicBlock can only be used by Instructions (specifically PHI and terms).
   Instruction       *use_back()       { return cast<Instruction>(*use_begin());}
@@ -98,7 +98,7 @@ public:
   /// null pointer back.
   ///
   TerminatorInst *getTerminator();
-  const TerminatorInst *const getTerminator() const;
+  const TerminatorInst *getTerminator() const;
   
   /// Returns a pointer to the first instructon in this block that is not a 
   /// PHINode instruction. When adding instruction to the beginning of the
@@ -106,6 +106,9 @@ public:
   /// the first instruction, which might be PHI.
   /// Returns 0 is there's no non-PHI instruction.
   Instruction* getFirstNonPHI();
+  const Instruction* getFirstNonPHI() const {
+    return const_cast<BasicBlock*>(this)->getFirstNonPHI();
+  }
   
   /// removeFromParent - This method unlinks 'this' from the containing
   /// function, but does not delete it.
@@ -199,7 +202,7 @@ public:
   
   static unsigned getInstListOffset() {
     BasicBlock *Obj = 0;
-    return reinterpret_cast<unsigned>(&Obj->InstList);
+    return unsigned(reinterpret_cast<uintptr_t>(&Obj->InstList));
   }
 };