[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

llvm-svn: 264578

1 files changed, 76 insertions, 0 deletions

diff --git a/llvm/lib/Target/Lanai/LanaiSubtarget.h b/llvm/lib/Target/Lanai/LanaiSubtarget.h
new file mode 100644
index 00000000000..f50347682e2
--- /dev/null
+++ b/llvm/lib/Target/Lanai/LanaiSubtarget.h
@@ -0,0 +1,76 @@
+//=====-- LanaiSubtarget.h - Define Subtarget for the Lanai -----*- C++ -*--==//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file declares the Lanai specific subclass of TargetSubtarget.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_LIB_TARGET_LANAI_LANAISUBTARGET_H
+#define LLVM_LIB_TARGET_LANAI_LANAISUBTARGET_H
+
+#include "LanaiFrameLowering.h"
+#include "LanaiISelLowering.h"
+#include "LanaiInstrInfo.h"
+#include "LanaiSelectionDAGInfo.h"
+#include "llvm/IR/DataLayout.h"
+#include "llvm/Target/TargetFrameLowering.h"
+#include "llvm/Target/TargetMachine.h"
+#include "llvm/Target/TargetSubtargetInfo.h"
+
+#define GET_SUBTARGETINFO_HEADER
+#include "LanaiGenSubtargetInfo.inc"
+
+namespace llvm {
+
+class LanaiSubtarget : public LanaiGenSubtargetInfo {
+public:
+  // This constructor initializes the data members to match that
+  // of the specified triple.
+  LanaiSubtarget(const Triple &TargetTriple, StringRef Cpu,
+                 StringRef FeatureString, const TargetMachine &TM,
+                 const TargetOptions &Options, Reloc::Model RelocationModel,
+                 CodeModel::Model CodeModel, CodeGenOpt::Level OptLevel);
+
+  // ParseSubtargetFeatures - Parses features string setting specified
+  // subtarget options.  Definition of function is auto generated by tblgen.
+  void ParseSubtargetFeatures(StringRef CPU, StringRef FS);
+
+  LanaiSubtarget &initializeSubtargetDependencies(StringRef CPU, StringRef FS);
+
+  void initSubtargetFeatures(StringRef CPU, StringRef FS);
+
+  bool enableMachineScheduler() const override { return true; }
+
+  const LanaiInstrInfo *getInstrInfo() const override { return &InstrInfo; }
+
+  const TargetFrameLowering *getFrameLowering() const override {
+    return &FrameLowering;
+  }
+
+  const LanaiRegisterInfo *getRegisterInfo() const override {
+    return &InstrInfo.getRegisterInfo();
+  }
+
+  const LanaiTargetLowering *getTargetLowering() const override {
+    return &TLInfo;
+  }
+
+  const LanaiSelectionDAGInfo *getSelectionDAGInfo() const override {
+    return &TSInfo;
+  }
+
+private:
+  LanaiFrameLowering FrameLowering;
+  LanaiInstrInfo InstrInfo;
+  LanaiTargetLowering TLInfo;
+  LanaiSelectionDAGInfo TSInfo;
+};
+} // namespace llvm
+
+#endif // LLVM_LIB_TARGET_LANAI_LANAISUBTARGET_H