Add missing const qualifiers.

[oota-llvm.git] / include / llvm / CodeGen / MachineBasicBlock.h

diff --git a/include/llvm/CodeGen/MachineBasicBlock.h b/include/llvm/CodeGen/MachineBasicBlock.h
index 142f8d8fa6f9175ebb579bbcbf9a7fb8557a726b..b3578584e6339ba26470fdca5a9df9623cdebf29 100644 (file)
--- a/include/llvm/CodeGen/MachineBasicBlock.h
+++ b/include/llvm/CodeGen/MachineBasicBlock.h
@@ -58,7 +58,6 @@ public:
 class BasicBlock;
 
 class MachineBasicBlock {
-public:
   typedef ilist<MachineInstr> Instructions;
   Instructions Insts;
   MachineBasicBlock *Prev, *Next;
@@ -74,10 +73,16 @@ public:
   /// LiveIns - Keep track of the physical registers that are livein of
   /// the basicblock.
   std::vector<unsigned> LiveIns;
+  
+  /// IsLandingPad - Indicate that this basic block is entered via an
+  /// exception handler.
+  bool IsLandingPad;
 
 public:
-  MachineBasicBlock(const BasicBlock *bb = 0) : Prev(0), Next(0), BB(bb),
-                                                Number(-1), Parent(0) {
+  explicit MachineBasicBlock(const BasicBlock *bb = 0) : Prev(0), Next(0),
+                                                         BB(bb), Number(-1),
+                                                         Parent(0),
+                                                         IsLandingPad(false) {
     Insts.parent = this;
   }
 
@@ -118,17 +123,41 @@ public:
   typedef std::vector<MachineBasicBlock *>::const_iterator const_pred_iterator;
   typedef std::vector<MachineBasicBlock *>::iterator       succ_iterator;
   typedef std::vector<MachineBasicBlock *>::const_iterator const_succ_iterator;
+  typedef std::vector<MachineBasicBlock *>::reverse_iterator
+                                                         pred_reverse_iterator;
+  typedef std::vector<MachineBasicBlock *>::const_reverse_iterator
+                                                   const_pred_reverse_iterator;
+  typedef std::vector<MachineBasicBlock *>::reverse_iterator
+                                                         succ_reverse_iterator;
+  typedef std::vector<MachineBasicBlock *>::const_reverse_iterator
+                                                   const_succ_reverse_iterator;
 
   pred_iterator        pred_begin()       { return Predecessors.begin(); }
   const_pred_iterator  pred_begin() const { return Predecessors.begin(); }
   pred_iterator        pred_end()         { return Predecessors.end();   }
   const_pred_iterator  pred_end()   const { return Predecessors.end();   }
+  pred_reverse_iterator        pred_rbegin()
+                                          { return Predecessors.rbegin();}
+  const_pred_reverse_iterator  pred_rbegin() const
+                                          { return Predecessors.rbegin();}
+  pred_reverse_iterator        pred_rend()
+                                          { return Predecessors.rend();  }
+  const_pred_reverse_iterator  pred_rend()   const
+                                          { return Predecessors.rend();  }
   unsigned             pred_size()  const { return Predecessors.size();  }
   bool                 pred_empty() const { return Predecessors.empty(); }
   succ_iterator        succ_begin()       { return Successors.begin();   }
   const_succ_iterator  succ_begin() const { return Successors.begin();   }
   succ_iterator        succ_end()         { return Successors.end();     }
   const_succ_iterator  succ_end()   const { return Successors.end();     }
+  succ_reverse_iterator        succ_rbegin()
+                                          { return Successors.rbegin();  }
+  const_succ_reverse_iterator  succ_rbegin() const
+                                          { return Successors.rbegin();  }
+  succ_reverse_iterator        succ_rend()
+                                          { return Successors.rend();    }
+  const_succ_reverse_iterator  succ_rend()   const
+                                          { return Successors.rend();    }
   unsigned             succ_size()  const { return Successors.size();    }
   bool                 succ_empty() const { return Successors.empty();   }
 
@@ -138,13 +167,28 @@ public:
   /// is an error to add the same register to the same set more than once.
   void addLiveIn(unsigned Reg)  { LiveIns.push_back(Reg); }
 
+  /// removeLiveIn - Remove the specified register from the live in set.
+  ///
+  void removeLiveIn(unsigned Reg);
+
   // Iteration support for live in sets.  These sets are kept in sorted
   // order by their register number.
-  typedef std::vector<unsigned>::const_iterator livein_iterator;
-  livein_iterator livein_begin() const { return LiveIns.begin(); }
-  livein_iterator livein_end()   const { return LiveIns.end(); }
+  typedef std::vector<unsigned>::iterator       livein_iterator;
+  typedef std::vector<unsigned>::const_iterator const_livein_iterator;
+  livein_iterator       livein_begin()       { return LiveIns.begin(); }
+  const_livein_iterator livein_begin() const { return LiveIns.begin(); }
+  livein_iterator       livein_end()         { return LiveIns.end(); }
+  const_livein_iterator livein_end()   const { return LiveIns.end(); }
   bool            livein_empty() const { return LiveIns.empty(); }
 
+  /// isLandingPad - Returns true if the block is a landing pad. That is
+  /// this basic block is entered via an exception handler.
+  bool isLandingPad() const { return IsLandingPad; }
+
+  /// setIsLandingPad - Indicates the block is a landing pad.  That is
+  /// this basic block is entered via an exception handler.
+  void setIsLandingPad() { IsLandingPad = true; }
+
   // Code Layout methods.
   
   /// moveBefore/moveAfter - move 'this' block before or after the specified
@@ -173,12 +217,7 @@ public:
   
   /// isSuccessor - Return true if the specified MBB is a successor of this
   /// block.
-  bool isSuccessor(MachineBasicBlock *MBB) const {
-    for (const_succ_iterator I = succ_begin(), E = succ_end(); I != E; ++I)
-      if (*I == MBB)
-        return true;
-    return false;
-  }
+  bool isSuccessor(MachineBasicBlock *MBB) const;
 
   /// getFirstTerminator - returns an iterator to the first terminator
   /// instruction of this basic block. If a terminator does not exist,