CXX_FAST_TLS calling convention: performance improvement for ARM.

[oota-llvm.git] / lib / Target / ARM / ARMBaseRegisterInfo.h

diff --git a/lib/Target/ARM/ARMBaseRegisterInfo.h b/lib/Target/ARM/ARMBaseRegisterInfo.h
index 4ffcec1efb731039932c92eb7c168f788c86776c..6a9a45a656876dd5c35e51f79dad9ca32e7cb360 100644 (file)
--- a/lib/Target/ARM/ARMBaseRegisterInfo.h
+++ b/lib/Target/ARM/ARMBaseRegisterInfo.h
@@ -11,8 +11,8 @@
 //
 //===----------------------------------------------------------------------===//
 
-#ifndef ARMBASEREGISTERINFO_H
-#define ARMBASEREGISTERINFO_H
+#ifndef LLVM_LIB_TARGET_ARM_ARMBASEREGISTERINFO_H
+#define LLVM_LIB_TARGET_ARM_ARMBASEREGISTERINFO_H
 
 #include "MCTargetDesc/ARMBaseInfo.h"
 #include "llvm/Target/TargetRegisterInfo.h"
@@ -21,10 +21,6 @@
 #include "ARMGenRegisterInfo.inc"
 
 namespace llvm {
-  class ARMSubtarget;
-  class ARMBaseInstrInfo;
-  class Type;
-
 /// Register allocation hints.
 namespace ARMRI {
   enum {
@@ -66,6 +62,12 @@ static inline bool isARMArea3Register(unsigned Reg, bool isIOS) {
   switch (Reg) {
     case D15: case D14: case D13: case D12:
     case D11: case D10: case D9:  case D8:
+    case D7:  case D6:  case D5:  case D4:
+    case D3:  case D2:  case D1:  case D0:
+    case D31: case D30: case D29: case D28:
+    case D27: case D26: case D25: case D24:
+    case D23: case D22: case D21: case D20:
+    case D19: case D18: case D17: case D16:
       return true;
     default:
       return false;
@@ -82,28 +84,26 @@ static inline bool isCalleeSavedRegister(unsigned Reg,
 
 class ARMBaseRegisterInfo : public ARMGenRegisterInfo {
 protected:
-  const ARMSubtarget &STI;
-
-  /// FramePtr - ARM physical register used as frame ptr.
-  unsigned FramePtr;
-
   /// BasePtr - ARM physical register used as a base ptr in complex stack
   /// frames. I.e., when we need a 3rd base, not just SP and FP, due to
   /// variable size stack objects.
   unsigned BasePtr;
 
   // Can be only subclassed.
-  explicit ARMBaseRegisterInfo(const ARMSubtarget &STI);
+  explicit ARMBaseRegisterInfo();
 
   // Return the opcode that implements 'Op', or 0 if no opcode
   unsigned getOpcode(int Op) const;
 
 public:
   /// Code Generation virtual methods...
-  const uint16_t *
-  getCalleeSavedRegs(const MachineFunction *MF = 0) const override;
-  const uint32_t *getCallPreservedMask(CallingConv::ID) const override;
-  const uint32_t *getNoPreservedMask() const;
+  const MCPhysReg *getCalleeSavedRegs(const MachineFunction *MF) const override;
+  const MCPhysReg *
+  getCalleeSavedRegsViaCopy(const MachineFunction *MF) const override;
+  const uint32_t *getCallPreservedMask(const MachineFunction &MF,
+                                       CallingConv::ID) const override;
+  const uint32_t *getNoPreservedMask() const override;
+  const uint32_t *getTLSCallPreservedMask(const MachineFunction &MF) const;
 
   /// getThisReturnPreservedMask - Returns a call preserved mask specific to the
   /// case that 'returned' is on an i32 first argument if the calling convention
@@ -113,7 +113,8 @@ public:
   ///
   /// Should return NULL in the case that the calling convention does not have
   /// this property
-  const uint32_t *getThisReturnPreservedMask(CallingConv::ID) const;
+  const uint32_t *getThisReturnPreservedMask(const MachineFunction &MF,
+                                             CallingConv::ID) const;
 
   BitVector getReservedRegs(const MachineFunction &MF) const override;
 
@@ -124,7 +125,8 @@ public:
   getCrossCopyRegClass(const TargetRegisterClass *RC) const override;
 
   const TargetRegisterClass *
-  getLargestLegalSuperClass(const TargetRegisterClass *RC) const override;
+  getLargestLegalSuperClass(const TargetRegisterClass *RC,
+                            const MachineFunction &MF) const override;
 
   unsigned getRegPressureLimit(const TargetRegisterClass *RC,
                                MachineFunction &MF) const override;
@@ -133,26 +135,24 @@ public:
                              ArrayRef<MCPhysReg> Order,
                              SmallVectorImpl<MCPhysReg> &Hints,
                              const MachineFunction &MF,
-                             const VirtRegMap *VRM) const override;
+                             const VirtRegMap *VRM,
+                             const LiveRegMatrix *Matrix) const override;
 
-  void UpdateRegAllocHint(unsigned Reg, unsigned NewReg,
+  void updateRegAllocHint(unsigned Reg, unsigned NewReg,
                           MachineFunction &MF) const override;
 
-  bool avoidWriteAfterWrite(const TargetRegisterClass *RC) const override;
-
   bool hasBasePointer(const MachineFunction &MF) const;
 
-  bool canRealignStack(const MachineFunction &MF) const;
-  bool needsStackRealignment(const MachineFunction &MF) const override;
+  bool canRealignStack(const MachineFunction &MF) const override;
   int64_t getFrameIndexInstrOffset(const MachineInstr *MI,
                                    int Idx) const override;
   bool needsFrameBaseReg(MachineInstr *MI, int64_t Offset) const override;
   void materializeFrameBaseRegister(MachineBasicBlock *MBB,
                                     unsigned BaseReg, int FrameIdx,
                                     int64_t Offset) const override;
-  void resolveFrameIndex(MachineBasicBlock::iterator I,
-                         unsigned BaseReg, int64_t Offset) const override;
-  bool isFrameOffsetLegal(const MachineInstr *MI,
+  void resolveFrameIndex(MachineInstr &MI, unsigned BaseReg,
+                         int64_t Offset) const override;
+  bool isFrameOffsetLegal(const MachineInstr *MI, unsigned BaseReg,
                           int64_t Offset) const override;
 
   bool cannotEliminateFrame(const MachineFunction &MF) const;
@@ -174,8 +174,6 @@ public:
                                  unsigned MIFlags = MachineInstr::NoFlags)const;
 
   /// Code Generation virtual methods...
-  bool mayOverrideLocalAssignment() const override;
-
   bool requiresRegisterScavenging(const MachineFunction &MF) const override;
 
   bool trackLivenessAfterRegAlloc(const MachineFunction &MF) const override;
@@ -186,7 +184,15 @@ public:
 
   void eliminateFrameIndex(MachineBasicBlock::iterator II,
                            int SPAdj, unsigned FIOperandNum,
-                           RegScavenger *RS = NULL) const override;
+                           RegScavenger *RS = nullptr) const override;
+
+  /// \brief SrcRC and DstRC will be morphed into NewRC if this returns true
+  bool shouldCoalesce(MachineInstr *MI,
+                      const TargetRegisterClass *SrcRC,
+                      unsigned SubReg,
+                      const TargetRegisterClass *DstRC,
+                      unsigned DstSubReg,
+                      const TargetRegisterClass *NewRC) const override;
 };
 
 } // end namespace llvm