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1//===-- SystemZSubtarget.h - SystemZ subtarget information -----*- 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-exception6//7//===----------------------------------------------------------------------===//8//9// This file declares the SystemZ specific subclass of TargetSubtargetInfo.10//11//===----------------------------------------------------------------------===//12 13#ifndef LLVM_LIB_TARGET_SYSTEMZ_SYSTEMZSUBTARGET_H14#define LLVM_LIB_TARGET_SYSTEMZ_SYSTEMZSUBTARGET_H15 16#include "SystemZFrameLowering.h"17#include "SystemZISelLowering.h"18#include "SystemZInstrInfo.h"19#include "SystemZRegisterInfo.h"20#include "SystemZSelectionDAGInfo.h"21#include "llvm/CodeGen/TargetSubtargetInfo.h"22#include "llvm/IR/DataLayout.h"23#include "llvm/TargetParser/Triple.h"24#include <string>25 26#define GET_SUBTARGETINFO_HEADER27#include "SystemZGenSubtargetInfo.inc"28 29namespace llvm {30class GlobalValue;31class StringRef;32 33class SystemZSubtarget : public SystemZGenSubtargetInfo {34 virtual void anchor();35protected:36// Bool members corresponding to the SubtargetFeatures defined in tablegen.37#define GET_SUBTARGETINFO_MACRO(ATTRIBUTE, DEFAULT, GETTER) \38 bool ATTRIBUTE = DEFAULT;39#include "SystemZGenSubtargetInfo.inc"40 41private:42 Triple TargetTriple;43 std::unique_ptr<SystemZCallingConventionRegisters> SpecialRegisters;44 SystemZInstrInfo InstrInfo;45 SystemZTargetLowering TLInfo;46 SystemZSelectionDAGInfo TSInfo;47 std::unique_ptr<const SystemZFrameLowering> FrameLowering;48 49 SystemZSubtarget &initializeSubtargetDependencies(StringRef CPU,50 StringRef TuneCPU,51 StringRef FS);52 SystemZCallingConventionRegisters *initializeSpecialRegisters();53 54public:55 SystemZSubtarget(const Triple &TT, const std::string &CPU,56 const std::string &TuneCPU, const std::string &FS,57 const TargetMachine &TM);58 59 SystemZCallingConventionRegisters *getSpecialRegisters() const {60 assert(SpecialRegisters && "Unsupported SystemZ calling convention");61 return SpecialRegisters.get();62 }63 64 template <class SR> SR &getSpecialRegisters() const {65 return *static_cast<SR *>(getSpecialRegisters());66 }67 68 const TargetFrameLowering *getFrameLowering() const override {69 return FrameLowering.get();70 }71 72 template <class TFL> const TFL *getFrameLowering() const {73 return static_cast<const TFL *>(getFrameLowering());74 }75 76 const SystemZInstrInfo *getInstrInfo() const override { return &InstrInfo; }77 const SystemZRegisterInfo *getRegisterInfo() const override {78 return &InstrInfo.getRegisterInfo();79 }80 const SystemZTargetLowering *getTargetLowering() const override {81 return &TLInfo;82 }83 const SelectionDAGTargetInfo *getSelectionDAGInfo() const override {84 return &TSInfo;85 }86 87 // True if the subtarget should run MachineScheduler after aggressive88 // coalescing. This currently replaces the SelectionDAG scheduler with the89 // "source" order scheduler.90 bool enableMachineScheduler() const override { return true; }91 92 // This is important for reducing register pressure in vector code.93 bool useAA() const override { return true; }94 95 // Always enable the early if-conversion pass.96 bool enableEarlyIfConversion() const override { return true; }97 98 // Enable tracking of subregister liveness in register allocator.99 bool enableSubRegLiveness() const override;100 101 // Automatically generated by tblgen.102 void ParseSubtargetFeatures(StringRef CPU, StringRef TuneCPU, StringRef FS);103 104// Getters for SubtargetFeatures defined in tablegen.105#define GET_SUBTARGETINFO_MACRO(ATTRIBUTE, DEFAULT, GETTER) \106 bool GETTER() const { return ATTRIBUTE; }107#include "SystemZGenSubtargetInfo.inc"108 109 bool isXRaySupported() const override { return true; }110 111 bool isAddressedViaADA(const GlobalValue *GV) const;112 113 // Return true if GV can be accessed using LARL for reloc model RM114 // and code model CM.115 bool isPC32DBLSymbol(const GlobalValue *GV, CodeModel::Model CM) const;116 117 bool isTargetELF() const { return TargetTriple.isOSBinFormatELF(); }118 119 // Returns TRUE if we are generating GOFF object code120 bool isTargetGOFF() const { return TargetTriple.isOSBinFormatGOFF(); }121 122 // Returns TRUE if we are using XPLINK64 linkage convention123 bool isTargetXPLINK64() const { return (isTargetGOFF() && isTargetzOS()); }124 125 // Returns TRUE if we are generating code for a s390x machine running zOS126 bool isTargetzOS() const { return TargetTriple.isOSzOS(); }127};128} // end namespace llvm129 130#endif131