Vendor import of llvm trunk r126079:

http://llvm.org/svn/llvm-project/llvm/trunk@126079

1 files changed, 57 insertions, 0 deletions

diff --git a/lib/Target/SystemZ/SystemZFrameLowering.h b/lib/Target/SystemZ/SystemZFrameLowering.h
new file mode 100644
index 0000000..1284b68
--- /dev/null
+++ b/lib/Target/SystemZ/SystemZFrameLowering.h
@@ -0,0 +1,57 @@
+//=- SystemZFrameLowering.h - Define frame lowering for z/System -*- C++ -*--=//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+//
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef SYSTEMZ_FRAMEINFO_H
+#define SYSTEMZ_FRAMEINFO_H
+
+#include "SystemZ.h"
+#include "SystemZSubtarget.h"
+#include "llvm/Target/TargetFrameLowering.h"
+#include "llvm/ADT/IndexedMap.h"
+
+namespace llvm {
+  class SystemZSubtarget;
+
+class SystemZFrameLowering : public TargetFrameLowering {
+  IndexedMap<unsigned> RegSpillOffsets;
+protected:
+  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;
+};
+
+} // End llvm namespace
+
+#endif