Make SpillIs an optional pointer. Avoid creating a bunch of temporary SmallVectors.

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

diff --git a/include/llvm/CodeGen/MachineLocation.h b/include/llvm/CodeGen/MachineLocation.h
index ab6a82b14fc97e8b810de6207599ed496cd839e9..21951b6680b6c4b9395bc93754f01d004edbf9d9 100644 (file)
--- a/include/llvm/CodeGen/MachineLocation.h
+++ b/include/llvm/CodeGen/MachineLocation.h
@@ -2,8 +2,8 @@
 //
 //                     The LLVM Compiler Infrastructure
 //
-// This file was developed by James M. Laskey 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.
 //
 //===----------------------------------------------------------------------===//
 // The MachineLocation class is used to represent a simple location in a machine
@@ -22,38 +22,34 @@
 #define LLVM_CODEGEN_MACHINELOCATION_H
 
 namespace llvm {
-
+  class MCSymbol;
+  
 class MachineLocation {
 private:
   bool IsRegister;                      // True if location is a register.
   unsigned Register;                    // gcc/gdb register number.
   int Offset;                           // Displacement if not register.
-
 public:
   enum {
     // The target register number for an abstract frame pointer. The value is
-    // an arbitrary value greater than MRegisterInfo::FirstVirtualRegister.
+    // an arbitrary value that doesn't collide with any real target register.
     VirtualFP = ~0U
   };
   MachineLocation()
-  : IsRegister(false)
-  , Register(0)
-  , Offset(0)
-  {}
-  MachineLocation(unsigned R)
-  : IsRegister(true)
-  , Register(R)
-  , Offset(0)
-  {}
+  : IsRegister(false), Register(0), Offset(0) {}
+  explicit MachineLocation(unsigned R)
+  : IsRegister(true), Register(R), Offset(0) {}
   MachineLocation(unsigned R, int O)
-  : IsRegister(false)
-  , Register(R)
-  , Offset(O)
-  {}
+  : IsRegister(false), Register(R), Offset(O) {}
+
+  bool operator==(const MachineLocation &Other) const {
+      return IsRegister == Other.IsRegister && Register == Other.Register &&
+        Offset == Other.Offset;
+  }
   
   // Accessors
-  bool isRegister()      const { return IsRegister; }
-  unsigned getRegister() const { return Register; }
+  bool isReg()           const { return IsRegister; }
+  unsigned getReg()      const { return Register; }
   int getOffset()        const { return Offset; }
   void setIsRegister(bool Is)  { IsRegister = Is; }
   void setRegister(unsigned R) { Register = R; }
@@ -74,23 +70,25 @@ public:
 #endif
 };
 
+/// MachineMove - This class represents the save or restore of a callee saved
+/// register that exception or debug info needs to know about.
 class MachineMove {
 private:
-  unsigned LabelID;                     // Label ID number for post-instruction
-                                        // address when result of move takes
-                                        // effect.
-  const MachineLocation Destination;    // Move to location.
-  const MachineLocation Source;         // Move from location.
+  /// Label - Symbol for post-instruction address when result of move takes
+  /// effect.
+  MCSymbol *Label;
   
+  // Move to & from location.
+  MachineLocation Destination, Source;
 public:
-  MachineMove(unsigned ID, MachineLocation &D, MachineLocation &S)
-  : LabelID(ID)
-  , Destination(D)
-  , Source(S)
-  {}
+  MachineMove() : Label(0) {}
+
+  MachineMove(MCSymbol *label, const MachineLocation &D,
+              const MachineLocation &S)
+  : Label(label), Destination(D), Source(S) {}
   
   // Accessors
-  unsigned getLabelID()                   const { return LabelID; }
+  MCSymbol *getLabel()                    const { return Label; }
   const MachineLocation &getDestination() const { return Destination; }
   const MachineLocation &getSource()      const { return Source; }
 };