another missed SSE optimization

[oota-llvm.git] / lib / Target / X86 / X86RegisterInfo.h

diff --git a/lib/Target/X86/X86RegisterInfo.h b/lib/Target/X86/X86RegisterInfo.h
index c6644e767b5b5c1f0e057786870ba40ff566a0a8..cf83f99963de365857f7b817803a7e1927cbae37 100644 (file)
--- a/lib/Target/X86/X86RegisterInfo.h
+++ b/lib/Target/X86/X86RegisterInfo.h
@@ -15,15 +15,33 @@
 #define X86REGISTERINFO_H
 
 #include "llvm/Target/MRegisterInfo.h"
-
-class llvm::Type;
-
 #include "X86GenRegisterInfo.h.inc"
 
 namespace llvm {
+  class Type;
+  class TargetInstrInfo;
+  class X86TargetMachine;
+
+class X86RegisterInfo : public X86GenRegisterInfo {
+public:
+  X86TargetMachine &TM;
+  const TargetInstrInfo &TII;
+
+private:
+  /// Is64Bit - Is the target 64-bits.
+  bool Is64Bit;
 
-struct X86RegisterInfo : public X86GenRegisterInfo {
-  X86RegisterInfo();
+  /// SlotSize - Stack slot size in bytes.
+  unsigned SlotSize;
+
+  /// StackPtr - X86 physical register used as stack ptr.
+  unsigned StackPtr;
+
+  /// FramePtr - X86 physical register used as frame ptr.
+  unsigned FramePtr;
+
+public:
+  X86RegisterInfo(X86TargetMachine &tm, const TargetInstrInfo &tii);
 
   /// Code Generation virtual methods...
   void storeRegToStackSlot(MachineBasicBlock &MBB,
@@ -40,9 +58,9 @@ struct X86RegisterInfo : public X86GenRegisterInfo {
                     MachineBasicBlock::iterator MI,
                     unsigned DestReg, unsigned SrcReg,
                     const TargetRegisterClass *RC) const;
-
-  unsigned isLoadFromStackSlot(MachineInstr *MI, int &FrameIndex) const;
-
+ 
+  void reMaterialize(MachineBasicBlock &MBB, MachineBasicBlock::iterator MI,
+                     unsigned DestReg, const MachineInstr *Orig) const;
 
   /// foldMemoryOperand - If this target supports it, fold a load or store of
   /// the specified stack slot into the specified machine instruction for the
@@ -50,23 +68,54 @@ struct X86RegisterInfo : public X86GenRegisterInfo {
   /// folding and return true, otherwise it should return false.  If it folds
   /// the instruction, it is likely that the MachineInstruction the iterator
   /// references has been changed.
-  virtual MachineInstr* foldMemoryOperand(MachineInstr* MI,
-                                          unsigned OpNum,
-                                          int FrameIndex) const;
+  MachineInstr* foldMemoryOperand(MachineInstr* MI,
+                                  unsigned OpNum,
+                                  int FrameIndex) const;
+
+  /// getCalleeSavedRegs - Return a null-terminated list of all of the
+  /// callee-save registers on this target.
+  const unsigned *getCalleeSavedRegs() const;
+
+  /// getCalleeSavedRegClasses - Return a null-terminated list of the preferred
+  /// register classes to spill each callee-saved register with.  The order and
+  /// length of this list match the getCalleeSavedRegs() list.
+  const TargetRegisterClass* const* getCalleeSavedRegClasses() const;
+
+  /// getReservedRegs - Returns a bitset indexed by physical register number
+  /// indicating if a register is a special register that has particular uses and
+  /// should be considered unavailable at all times, e.g. SP, RA. This is used by
+  /// register scavenger to determine what registers are free.
+  BitVector getReservedRegs(const MachineFunction &MF) const;
 
+  bool hasFP(const MachineFunction &MF) const;
 
   void eliminateCallFramePseudoInstr(MachineFunction &MF,
                                      MachineBasicBlock &MBB,
                                      MachineBasicBlock::iterator MI) const;
 
-  void eliminateFrameIndex(MachineBasicBlock::iterator MI) const;
+  void eliminateFrameIndex(MachineBasicBlock::iterator MI,
+                           int SPAdj, RegScavenger *RS = NULL) const;
 
   void processFunctionBeforeFrameFinalized(MachineFunction &MF) const;
 
   void emitPrologue(MachineFunction &MF) const;
   void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const;
+
+  // Debug information queries.
+  unsigned getRARegister() const;
+  unsigned getFrameRegister(MachineFunction &MF) const;
+  void getInitialFrameState(std::vector<MachineMove> &Moves) const;
+
+  // Exception handling queries.
+  unsigned getEHExceptionRegister() const;
+  unsigned getEHHandlerRegister() const;
 };
 
+// getX86SubSuperRegister - X86 utility function. It returns the sub or super
+// register of a specific X86 register.
+// e.g. getX86SubSuperRegister(X86::EAX, MVT::i16) return X86:AX
+unsigned getX86SubSuperRegister(unsigned, MVT::ValueType, bool High=false);
+
 } // End llvm namespace
 
 #endif