1 files changed, 78 insertions, 0 deletions
diff --git a/lib/Target/SystemZ/SystemZFrameLowering.h b/lib/Target/SystemZ/SystemZFrameLowering.h
new file mode 100644
index 0000000..9b0a1d5
--- /dev/null
+++ b/lib/Target/SystemZ/SystemZFrameLowering.h
@@ -0,0 +1,78 @@
+//===-- SystemZFrameLowering.h - Frame lowering for SystemZ -----*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef SYSTEMZFRAMELOWERING_H
+#define SYSTEMZFRAMELOWERING_H
+
+#include "SystemZSubtarget.h"
+#include "llvm/ADT/IndexedMap.h"
+#include "llvm/Target/TargetFrameLowering.h"
+
+namespace llvm {
+class SystemZTargetMachine;
+class SystemZSubtarget;
+
+class SystemZFrameLowering : public TargetFrameLowering {
+  IndexedMap<unsigned> RegSpillOffsets;
+
+protected:
+  const SystemZTargetMachine &TM;
+  const SystemZSubtarget &STI;
+
+public:
+  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;
+
+  // 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