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-exception
6//
7//===----------------------------------------------------------------------===//
8//
9// This file declares the SystemZ specific subclass of TargetSubtargetInfo.
10//
11//===----------------------------------------------------------------------===//
12
13#ifndef LLVM_LIB_TARGET_SYSTEMZ_SYSTEMZSUBTARGET_H
14#define LLVM_LIB_TARGET_SYSTEMZ_SYSTEMZSUBTARGET_H
15
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_HEADER
27#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 aggressive
88 // coalescing. This currently replaces the SelectionDAG scheduler with the
89 // "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 RM
114 // 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 code
120 bool isTargetGOFF() const { return TargetTriple.isOSBinFormatGOFF(); }
121
122 // Returns TRUE if we are using XPLINK64 linkage convention
123 bool isTargetXPLINK64() const { return (isTargetGOFF() && isTargetzOS()); }
124
125 // Returns TRUE if we are generating code for a s390x machine running zOS
126 bool isTargetzOS() const { return TargetTriple.isOSzOS(); }
127};
128} // end namespace llvm
129
130#endif
131