make MachineFunction keep track of its ID and make

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

diff --git a/include/llvm/CodeGen/MachineConstantPool.h b/include/llvm/CodeGen/MachineConstantPool.h
index d042258f5e2ffcb39c31eeb9213461f6c3731604..8d6c1d1e4ca2c0f088ef981e8fb051aee0fe57da 100644 (file)
--- a/include/llvm/CodeGen/MachineConstantPool.h
+++ b/include/llvm/CodeGen/MachineConstantPool.h
@@ -17,6 +17,7 @@
 #define LLVM_CODEGEN_MACHINECONSTANTPOOL_H
 
 #include <cassert>
+#include <climits>
 #include <vector>
 
 namespace llvm {
@@ -40,8 +41,15 @@ public:
 
   /// getType - get type of this MachineConstantPoolValue.
   ///
-  inline const Type *getType() const { return Ty; }
+  const Type *getType() const { return Ty; }
 
+  
+  /// getRelocationInfo - This method classifies the entry according to
+  /// whether or not it may generate a relocation entry.  This must be
+  /// conservative, so if it might codegen to a relocatable entry, it should say
+  /// so.  The return values are the same as Constant::getRelocationInfo().
+  virtual unsigned getRelocationInfo() const = 0;
+  
   virtual int getExistingMachineCPValue(MachineConstantPool *CP,
                                         unsigned Alignment) = 0;
 
@@ -70,31 +78,42 @@ public:
     MachineConstantPoolValue *MachineCPVal;
   } Val;
 
-  /// The offset of the constant from the start of the pool. The top bit is set
-  /// when Val is a MachineConstantPoolValue.
-  unsigned Offset;
+  /// The required alignment for this entry. The top bit is set when Val is
+  /// a MachineConstantPoolValue.
+  unsigned Alignment;
 
-  MachineConstantPoolEntry(Constant *V, unsigned O)
-    : Offset(O) {
-    assert((int)Offset >= 0 && "Offset is too large");
+  MachineConstantPoolEntry(Constant *V, unsigned A)
+    : Alignment(A) {
     Val.ConstVal = V;
   }
-  MachineConstantPoolEntry(MachineConstantPoolValue *V, unsigned O)
-    : Offset(O){
-    assert((int)Offset >= 0 && "Offset is too large");
+  MachineConstantPoolEntry(MachineConstantPoolValue *V, unsigned A)
+    : Alignment(A) {
     Val.MachineCPVal = V; 
-    Offset |= 1 << (sizeof(unsigned)*8-1);
+    Alignment |= 1U << (sizeof(unsigned)*CHAR_BIT-1);
   }
 
   bool isMachineConstantPoolEntry() const {
-    return (int)Offset < 0;
+    return (int)Alignment < 0;
   }
 
-  int getOffset() const { 
-    return Offset & ~(1 << (sizeof(unsigned)*8-1));
+  int getAlignment() const { 
+    return Alignment & ~(1 << (sizeof(unsigned)*CHAR_BIT-1));
   }
 
   const Type *getType() const;
+  
+  /// getRelocationInfo - This method classifies the entry according to
+  /// whether or not it may generate a relocation entry.  This must be
+  /// conservative, so if it might codegen to a relocatable entry, it should say
+  /// so.  The return values are:
+  /// 
+  ///  0: This constant pool entry is guaranteed to never have a relocation
+  ///     applied to it (because it holds a simple constant like '4').
+  ///  1: This entry has relocations, but the entries are guaranteed to be
+  ///     resolvable by the static linker, so the dynamic linker will never see
+  ///     them.
+  ///  2: This entry may have arbitrary relocations. 
+  unsigned getRelocationInfo() const;
 };
   
 /// The MachineConstantPool class keeps track of constants referenced by a
@@ -117,13 +136,13 @@ public:
     : TD(td), PoolAlignment(1) {}
   ~MachineConstantPool();
     
-  /// getConstantPoolAlignment - Return the log2 of the alignment required by
+  /// getConstantPoolAlignment - Return the the alignment required by
   /// the whole constant pool, of which the first element must be aligned.
   unsigned getConstantPoolAlignment() const { return PoolAlignment; }
   
   /// getConstantPoolIndex - Create a new entry in the constant pool or return
-  /// an existing one.  User must specify the log2 of the minimum required
-  /// alignment for the object.
+  /// an existing one.  User must specify the minimum required alignment for
+  /// the object.
   unsigned getConstantPoolIndex(Constant *C, unsigned Alignment);
   unsigned getConstantPoolIndex(MachineConstantPoolValue *V,unsigned Alignment);