1 files changed, 78 insertions, 0 deletions
diff --git a/lib/Target/ARC/ARCFrameLowering.h b/lib/Target/ARC/ARCFrameLowering.h
new file mode 100644
index 000000000000..c042bec016ca
--- /dev/null
+++ b/lib/Target/ARC/ARCFrameLowering.h
@@ -0,0 +1,78 @@
+//===- ARCFrameLowering.h - Define frame lowering for ARC -------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This class implements the ARC specific frame lowering.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_LIB_TARGET_ARC_ARCFRAMELOWERING_H
+#define LLVM_LIB_TARGET_ARC_ARCFRAMELOWERING_H
+
+#include "ARC.h"
+#include "llvm/CodeGen/MachineBasicBlock.h"
+#include "llvm/CodeGen/MachineFrameInfo.h"
+#include "llvm/CodeGen/TargetFrameLowering.h"
+
+namespace llvm {
+
+class MachineFunction;
+class ARCSubtarget;
+class ARCInstrInfo;
+
+class ARCFrameLowering : public TargetFrameLowering {
+public:
+  ARCFrameLowering(const ARCSubtarget &st)
+      : TargetFrameLowering(TargetFrameLowering::StackGrowsDown, 4, 0), ST(st) {
+  }
+
+  /// Insert Prologue into the function.
+  void emitPrologue(MachineFunction &MF, MachineBasicBlock &MBB) const override;
+
+  /// Insert Epilogue into the function.
+  void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const override;
+
+  /// Add explicit callee save registers.
+  void determineCalleeSaves(MachineFunction &MF, BitVector &SavedRegs,
+                            RegScavenger *RS) const override;
+
+  bool spillCalleeSavedRegisters(MachineBasicBlock &MBB,
+                                 MachineBasicBlock::iterator MI,
+                                 const std::vector<CalleeSavedInfo> &CSI,
+                                 const TargetRegisterInfo *TRI) const override;
+
+  bool
+  restoreCalleeSavedRegisters(MachineBasicBlock &MBB,
+                              MachineBasicBlock::iterator MI,
+                              std::vector<CalleeSavedInfo> &CSI,
+                              const TargetRegisterInfo *TRI) const override;
+
+  void processFunctionBeforeFrameFinalized(MachineFunction &MF,
+                                           RegScavenger *RS) const override;
+
+  bool hasFP(const MachineFunction &MF) const override;
+
+  MachineBasicBlock::iterator
+  eliminateCallFramePseudoInstr(MachineFunction &MF, MachineBasicBlock &MBB,
+                                MachineBasicBlock::iterator I) const override;
+
+  bool assignCalleeSavedSpillSlots(
+      llvm::MachineFunction &, const llvm::TargetRegisterInfo *,
+      std::vector<llvm::CalleeSavedInfo> &) const override;
+
+private:
+  void adjustStackToMatchRecords(MachineBasicBlock &MBB,
+                                 MachineBasicBlock::iterator MI,
+                                 bool allocate) const;
+
+  const ARCSubtarget &ST;
+};
+
+} // end namespace llvm
+
+#endif // LLVM_LIB_TARGET_ARC_ARCFRAMELOWERING_H