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      1 //===-- VESubtarget.h - Define Subtarget for the VE -------------*- C++ -*-===//
      2 //
      3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
      4 // See https://llvm.org/LICENSE.txt for license information.
      5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
      6 //
      7 //===----------------------------------------------------------------------===//
      8 //
      9 // This file declares the VE specific subclass of TargetSubtargetInfo.
     10 //
     11 //===----------------------------------------------------------------------===//
     12 
     13 #ifndef LLVM_LIB_TARGET_VE_VESUBTARGET_H
     14 #define LLVM_LIB_TARGET_VE_VESUBTARGET_H
     15 
     16 #include "VEFrameLowering.h"
     17 #include "VEISelLowering.h"
     18 #include "VEInstrInfo.h"
     19 #include "llvm/CodeGen/SelectionDAGTargetInfo.h"
     20 #include "llvm/CodeGen/TargetFrameLowering.h"
     21 #include "llvm/CodeGen/TargetSubtargetInfo.h"
     22 #include "llvm/IR/DataLayout.h"
     23 #include <string>
     24 
     25 #define GET_SUBTARGETINFO_HEADER
     26 #include "VEGenSubtargetInfo.inc"
     27 
     28 namespace llvm {
     29 class StringRef;
     30 
     31 class VESubtarget : public VEGenSubtargetInfo {
     32   Triple TargetTriple;
     33   virtual void anchor();
     34 
     35   /// Features {
     36 
     37   // Emit VPU instructions
     38   bool EnableVPU;
     39 
     40   /// } Features
     41 
     42   VEInstrInfo InstrInfo;
     43   VETargetLowering TLInfo;
     44   SelectionDAGTargetInfo TSInfo;
     45   VEFrameLowering FrameLowering;
     46 
     47 public:
     48   VESubtarget(const Triple &TT, const std::string &CPU, const std::string &FS,
     49               const TargetMachine &TM);
     50 
     51   const VEInstrInfo *getInstrInfo() const override { return &InstrInfo; }
     52   const VEFrameLowering *getFrameLowering() const override {
     53     return &FrameLowering;
     54   }
     55   const VERegisterInfo *getRegisterInfo() const override {
     56     return &InstrInfo.getRegisterInfo();
     57   }
     58   const VETargetLowering *getTargetLowering() const override { return &TLInfo; }
     59   const SelectionDAGTargetInfo *getSelectionDAGInfo() const override {
     60     return &TSInfo;
     61   }
     62 
     63   bool enableMachineScheduler() const override;
     64 
     65   bool enableVPU() const { return EnableVPU; }
     66 
     67   /// ParseSubtargetFeatures - Parses features string setting specified
     68   /// subtarget options.  Definition of function is auto generated by tblgen.
     69   void ParseSubtargetFeatures(StringRef CPU, StringRef TuneCPU, StringRef FS);
     70   VESubtarget &initializeSubtargetDependencies(StringRef CPU, StringRef FS);
     71 
     72   /// Given a actual stack size as determined by FrameInfo, this function
     73   /// returns adjusted framesize which includes space for RSA, return
     74   /// address, and frame poitner.
     75   uint64_t getAdjustedFrameSize(uint64_t FrameSize) const;
     76 
     77   /// Get the size of RSA, return address, and frame pointer as described
     78   /// in VEFrameLowering.cpp.
     79   unsigned getRsaSize(void) const { return 176; };
     80 
     81   bool isTargetLinux() const { return TargetTriple.isOSLinux(); }
     82 };
     83 
     84 } // namespace llvm
     85 
     86 #endif
     87