Support for microMIPS trap instructions 1.

[oota-llvm.git] / lib / Target / SystemZ / SystemZFrameLowering.h

diff --git a/lib/Target/SystemZ/SystemZFrameLowering.h b/lib/Target/SystemZ/SystemZFrameLowering.h
index 1284b6802b3a5190ab36110e2a791ae33e1f5fdf..9b0a1d5f224cb442ef09b6e22ba58f5257b573ad 100644 (file)
--- a/lib/Target/SystemZ/SystemZFrameLowering.h
+++ b/lib/Target/SystemZ/SystemZFrameLowering.h
@@ -1,4 +1,4 @@
-//=- SystemZFrameLowering.h - Define frame lowering for z/System -*- C++ -*--=//
+//===-- SystemZFrameLowering.h - Frame lowering for SystemZ -----*- C++ -*-===//
 //
 //                     The LLVM Compiler Infrastructure
 //
@@ -6,52 +6,73 @@
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
-//
-//
-//
-//===----------------------------------------------------------------------===//
 
-#ifndef SYSTEMZ_FRAMEINFO_H
-#define SYSTEMZ_FRAMEINFO_H
+#ifndef SYSTEMZFRAMELOWERING_H
+#define SYSTEMZFRAMELOWERING_H
 
-#include "SystemZ.h"
 #include "SystemZSubtarget.h"
-#include "llvm/Target/TargetFrameLowering.h"
 #include "llvm/ADT/IndexedMap.h"
+#include "llvm/Target/TargetFrameLowering.h"
 
 namespace llvm {
-  class SystemZSubtarget;
+class SystemZTargetMachine;
+class SystemZSubtarget;
 
 class SystemZFrameLowering : public TargetFrameLowering {
   IndexedMap<unsigned> RegSpillOffsets;
+
 protected:
+  const SystemZTargetMachine &TM;
   const SystemZSubtarget &STI;
 
 public:
-  explicit SystemZFrameLowering(const SystemZSubtarget &sti);
-
-  /// emitProlog/emitEpilog - These methods insert prolog and epilog code into
-  /// the function.
-  void emitPrologue(MachineFunction &MF) const;
-  void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const;
-
-  bool spillCalleeSavedRegisters(MachineBasicBlock &MBB,
-                                 MachineBasicBlock::iterator MI,
-                                 const std::vector<CalleeSavedInfo> &CSI,
-                                 const TargetRegisterInfo *TRI) const;
-  bool restoreCalleeSavedRegisters(MachineBasicBlock &MBB,
-                                   MachineBasicBlock::iterator MI,
-                                   const std::vector<CalleeSavedInfo> &CSI,
-                                   const TargetRegisterInfo *TRI) const;
-
-  void processFunctionBeforeCalleeSavedScan(MachineFunction &MF,
-                                            RegScavenger *RS) const;
-
-  bool hasReservedCallFrame(const MachineFunction &MF) const { return true; }
-  bool hasFP(const MachineFunction &MF) const;
-  int getFrameIndexOffset(const MachineFunction &MF, int FI) const;
-};
+  SystemZFrameLowering(const SystemZTargetMachine &tm,
+                       const SystemZSubtarget &sti);
+
+  // Override TargetFrameLowering.
+  virtual bool isFPCloseToIncomingSP() const LLVM_OVERRIDE { return false; }
+  virtual const SpillSlot *getCalleeSavedSpillSlots(unsigned &NumEntries) const
+    LLVM_OVERRIDE;
+  virtual void
+    processFunctionBeforeCalleeSavedScan(MachineFunction &MF,
+                                         RegScavenger *RS) const LLVM_OVERRIDE;
+  virtual bool
+    spillCalleeSavedRegisters(MachineBasicBlock &MBB,
+                              MachineBasicBlock::iterator MBBI,
+                              const std::vector<CalleeSavedInfo> &CSI,
+                              const TargetRegisterInfo *TRI) const
+    LLVM_OVERRIDE;
+  virtual bool
+    restoreCalleeSavedRegisters(MachineBasicBlock &MBB,
+                                MachineBasicBlock::iterator MBBII,
+                                const std::vector<CalleeSavedInfo> &CSI,
+                                const TargetRegisterInfo *TRI) const
+    LLVM_OVERRIDE;
+  virtual void processFunctionBeforeFrameFinalized(MachineFunction &MF,
+                                                   RegScavenger *RS) const;
+  virtual void emitPrologue(MachineFunction &MF) const LLVM_OVERRIDE;
+  virtual void emitEpilogue(MachineFunction &MF,
+                            MachineBasicBlock &MBB) const LLVM_OVERRIDE;
+  virtual bool hasFP(const MachineFunction &MF) const LLVM_OVERRIDE;
+  virtual int getFrameIndexOffset(const MachineFunction &MF,
+                                  int FI) const LLVM_OVERRIDE;
+  virtual bool hasReservedCallFrame(const MachineFunction &MF) const
+    LLVM_OVERRIDE;
+  virtual void
+  eliminateCallFramePseudoInstr(MachineFunction &MF,
+                                MachineBasicBlock &MBB,
+                                MachineBasicBlock::iterator MI) const
+    LLVM_OVERRIDE;
 
-} // End llvm namespace
+  // Return the number of bytes in the callee-allocated part of the frame.
+  uint64_t getAllocatedStackSize(const MachineFunction &MF) const;
+
+  // Return the byte offset from the incoming stack pointer of Reg's
+  // ABI-defined save slot.  Return 0 if no slot is defined for Reg.
+  unsigned getRegSpillOffset(unsigned Reg) const {
+    return RegSpillOffsets[Reg];
+  }
+};
+} // end namespace llvm
 
 #endif