[lanai] Add Lanai backend.

Add the Lanai backend to lib/Target.

General Lanai backend discussion on llvm-dev thread "[RFC] Lanai backend" (http://lists.llvm.org/pipermail/llvm-dev/2016-February/095118.html).

Differential Revision: http://reviews.llvm.org/D17011



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@264578 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 63 insertions, 0 deletions

diff --git a/lib/Target/Lanai/LanaiRegisterInfo.h b/lib/Target/Lanai/LanaiRegisterInfo.h
new file mode 100644
index 00000000000..8b84bbc460e
--- /dev/null
+++ b/lib/Target/Lanai/LanaiRegisterInfo.h
@@ -0,0 +1,63 @@
+//===- LanaiRegisterInfo.h - Lanai Register Information Impl ----*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file contains the Lanai implementation of the TargetRegisterInfo class.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_LIB_TARGET_LANAI_LANAIREGISTERINFO_H
+#define LLVM_LIB_TARGET_LANAI_LANAIREGISTERINFO_H
+
+#include "llvm/Target/TargetRegisterInfo.h"
+
+#define GET_REGINFO_HEADER
+#include "LanaiGenRegisterInfo.inc"
+
+namespace llvm {
+
+class TargetInstrInfo;
+class Type;
+
+struct LanaiRegisterInfo : public LanaiGenRegisterInfo {
+  LanaiRegisterInfo();
+
+  const uint32_t *getCallPreservedMask(const MachineFunction &MF,
+                                       CallingConv::ID) const override;
+
+  // Code Generation virtual methods.
+  const uint16_t *
+  getCalleeSavedRegs(const MachineFunction *MF = 0) const override;
+
+  BitVector getReservedRegs(const MachineFunction &MF) const override;
+
+  bool requiresRegisterScavenging(const MachineFunction &MF) const override;
+
+  bool trackLivenessAfterRegAlloc(const MachineFunction &MF) const override;
+
+  void eliminateFrameIndex(MachineBasicBlock::iterator II, int SPAdj,
+                           unsigned FIOperandNum,
+                           RegScavenger *RS = NULL) const override;
+
+  bool canRealignStack(const MachineFunction &MF) const override;
+
+  // Debug information queries.
+  unsigned getRARegister() const;
+  unsigned getFrameRegister(const MachineFunction &MF) const override;
+  unsigned getBaseRegister() const;
+  bool hasBasePointer(const MachineFunction &MF) const;
+
+  // Exception handling queries.
+  unsigned getEHExceptionRegister() const;
+  unsigned getEHHandlerRegister() const;
+  int getDwarfRegNum(unsigned RegNum, bool IsEH) const;
+};
+
+} // namespace llvm
+
+#endif // LLVM_LIB_TARGET_LANAI_LANAIREGISTERINFO_H