ARM backend contribution from Apple.

llvm-svn: 33353

1 files changed, 25 insertions, 8 deletions

diff --git a/llvm/lib/Target/ARM/ARMRegisterInfo.h b/llvm/lib/Target/ARM/ARMRegisterInfo.h
index 16c277ed928..6b9ac39a412 100644
--- a/llvm/lib/Target/ARM/ARMRegisterInfo.h
+++ b/llvm/lib/Target/ARM/ARMRegisterInfo.h
@@ -17,18 +17,36 @@
 
 #include "llvm/Target/MRegisterInfo.h"
 #include "ARMGenRegisterInfo.h.inc"
+#include <set>
 
 namespace llvm {
-
-class Type;
-class TargetInstrInfo;
+  class TargetInstrInfo;
+  class ARMSubtarget;
+  class Type;
 
 struct ARMRegisterInfo : public ARMGenRegisterInfo {
   const TargetInstrInfo &TII;
+  const ARMSubtarget &STI;
+private:
+  /// FramePtr - ARM physical register used as frame ptr.
+  unsigned FramePtr;
+
+public:
+  ARMRegisterInfo(const TargetInstrInfo &tii, const ARMSubtarget &STI);
 
-  ARMRegisterInfo(const TargetInstrInfo &tii);
+  /// getRegisterNumbering - Given the enum value for some register, e.g.
+  /// ARM::LR, return the number that it corresponds to (e.g. 14).
+  static unsigned getRegisterNumbering(unsigned RegEnum);
 
   /// Code Generation virtual methods...
+  bool spillCalleeSavedRegisters(MachineBasicBlock &MBB,
+                                 MachineBasicBlock::iterator MI,
+                                 const std::vector<CalleeSavedInfo> &CSI) const;
+
+  bool restoreCalleeSavedRegisters(MachineBasicBlock &MBB,
+                                   MachineBasicBlock::iterator MI,
+                                 const std::vector<CalleeSavedInfo> &CSI) const;
+
   void storeRegToStackSlot(MachineBasicBlock &MBB,
                            MachineBasicBlock::iterator MBBI,
                            unsigned SrcReg, int FrameIndex,
@@ -43,9 +61,8 @@ struct ARMRegisterInfo : public ARMGenRegisterInfo {
                     unsigned DestReg, unsigned SrcReg,
                     const TargetRegisterClass *RC) const;
 
-  virtual MachineInstr* foldMemoryOperand(MachineInstr* MI,
-                                          unsigned OpNum,
-                                          int FrameIndex) const;
+  MachineInstr* foldMemoryOperand(MachineInstr* MI, unsigned OpNum,
+                                  int FrameIndex) const;
 
   const unsigned *getCalleeSavedRegs() const;
 
@@ -57,7 +74,7 @@ struct ARMRegisterInfo : public ARMGenRegisterInfo {
 
   void eliminateFrameIndex(MachineBasicBlock::iterator II) const;
 
-  void processFunctionBeforeFrameFinalized(MachineFunction &MF) const;
+  void processFunctionBeforeCalleeSavedScan(MachineFunction &MF) const;
 
   void emitPrologue(MachineFunction &MF) const;
   void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const;