1 files changed, 65 insertions, 0 deletions
diff --git a/contrib/llvm/lib/Target/SystemZ/SystemZFrameLowering.h b/contrib/llvm/lib/Target/SystemZ/SystemZFrameLowering.h
new file mode 100644
index 0000000..46bb6b7
--- /dev/null
+++ b/contrib/llvm/lib/Target/SystemZ/SystemZFrameLowering.h
@@ -0,0 +1,65 @@
+//===-- 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 LLVM_LIB_TARGET_SYSTEMZ_SYSTEMZFRAMELOWERING_H
+#define LLVM_LIB_TARGET_SYSTEMZ_SYSTEMZFRAMELOWERING_H
+
+#include "llvm/ADT/IndexedMap.h"
+#include "llvm/Target/TargetFrameLowering.h"
+
+namespace llvm {
+class SystemZTargetMachine;
+class SystemZSubtarget;
+
+class SystemZFrameLowering : public TargetFrameLowering {
+  IndexedMap<unsigned> RegSpillOffsets;
+
+public:
+  SystemZFrameLowering();
+
+  // Override TargetFrameLowering.
+  bool isFPCloseToIncomingSP() const override { return false; }
+  const SpillSlot *getCalleeSavedSpillSlots(unsigned &NumEntries) const
+    override;
+  void determineCalleeSaves(MachineFunction &MF, BitVector &SavedRegs,
+                            RegScavenger *RS) const override;
+  bool spillCalleeSavedRegisters(MachineBasicBlock &MBB,
+                                 MachineBasicBlock::iterator MBBI,
+                                 const std::vector<CalleeSavedInfo> &CSI,
+                                 const TargetRegisterInfo *TRI) const override;
+  bool restoreCalleeSavedRegisters(MachineBasicBlock &MBB,
+                                   MachineBasicBlock::iterator MBBII,
+                                   const std::vector<CalleeSavedInfo> &CSI,
+                                   const TargetRegisterInfo *TRI) const
+    override;
+  void processFunctionBeforeFrameFinalized(MachineFunction &MF,
+                                           RegScavenger *RS) const override;
+  void emitPrologue(MachineFunction &MF, MachineBasicBlock &MBB) const override;
+  void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const override;
+  bool hasFP(const MachineFunction &MF) const override;
+  int getFrameIndexReference(const MachineFunction &MF, int FI,
+                             unsigned &FrameReg) const override;
+  bool hasReservedCallFrame(const MachineFunction &MF) const override;
+  void eliminateCallFramePseudoInstr(MachineFunction &MF,
+                                     MachineBasicBlock &MBB,
+                                     MachineBasicBlock::iterator MI) const
+    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