1 //===-- SystemZSubtarget.h - SystemZ subtarget information -----*- C++ -*--===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // This file declares the SystemZ specific subclass of TargetSubtargetInfo.
11 //
12 //===----------------------------------------------------------------------===//
13 
14 #ifndef LLVM_LIB_TARGET_SYSTEMZ_SYSTEMZSUBTARGET_H
15 #define LLVM_LIB_TARGET_SYSTEMZ_SYSTEMZSUBTARGET_H
16 
17 #include "SystemZFrameLowering.h"
18 #include "SystemZISelLowering.h"
19 #include "SystemZInstrInfo.h"
20 #include "SystemZRegisterInfo.h"
21 #include "SystemZSelectionDAGInfo.h"
22 #include "llvm/IR/DataLayout.h"
23 #include "llvm/ADT/Triple.h"
24 #include "llvm/Target/TargetSubtargetInfo.h"
25 #include <string>
26 
27 #define GET_SUBTARGETINFO_HEADER
28 #include "SystemZGenSubtargetInfo.inc"
29 
30 namespace llvm {
31 class GlobalValue;
32 class StringRef;
33 
34 class SystemZSubtarget : public SystemZGenSubtargetInfo {
35   virtual void anchor();
36 protected:
37   bool HasDistinctOps;
38   bool HasLoadStoreOnCond;
39   bool HasHighWord;
40   bool HasFPExtension;
41   bool HasPopulationCount;
42   bool HasFastSerialization;
43   bool HasInterlockedAccess1;
44   bool HasMiscellaneousExtensions;
45   bool HasExecutionHint;
46   bool HasLoadAndTrap;
47   bool HasTransactionalExecution;
48   bool HasProcessorAssist;
49   bool HasVector;
50   bool HasLoadStoreOnCond2;
51   bool HasLoadAndZeroRightmostByte;
52 
53 private:
54   Triple TargetTriple;
55   SystemZInstrInfo InstrInfo;
56   SystemZTargetLowering TLInfo;
57   SystemZSelectionDAGInfo TSInfo;
58   SystemZFrameLowering FrameLowering;
59 
60   SystemZSubtarget &initializeSubtargetDependencies(StringRef CPU,
61                                                     StringRef FS);
62 public:
63   SystemZSubtarget(const Triple &TT, const std::string &CPU,
64                    const std::string &FS, const TargetMachine &TM);
65 
66   const TargetFrameLowering *getFrameLowering() const override {
67     return &FrameLowering;
68   }
69   const SystemZInstrInfo *getInstrInfo() const override { return &InstrInfo; }
70   const SystemZRegisterInfo *getRegisterInfo() const override {
71     return &InstrInfo.getRegisterInfo();
72   }
73   const SystemZTargetLowering *getTargetLowering() const override {
74     return &TLInfo;
75   }
76   const SelectionDAGTargetInfo *getSelectionDAGInfo() const override {
77     return &TSInfo;
78   }
79 
80   // This is important for reducing register pressure in vector code.
81   bool useAA() const override { return true; }
82 
83   // Always enable the early if-conversion pass.
84   bool enableEarlyIfConversion() const override { return true; }
85 
86   // Automatically generated by tblgen.
87   void ParseSubtargetFeatures(StringRef CPU, StringRef FS);
88 
89   // Return true if the target has the distinct-operands facility.
90   bool hasDistinctOps() const { return HasDistinctOps; }
91 
92   // Return true if the target has the load/store-on-condition facility.
93   bool hasLoadStoreOnCond() const { return HasLoadStoreOnCond; }
94 
95   // Return true if the target has the load/store-on-condition facility 2.
96   bool hasLoadStoreOnCond2() const { return HasLoadStoreOnCond2; }
97 
98   // Return true if the target has the high-word facility.
99   bool hasHighWord() const { return HasHighWord; }
100 
101   // Return true if the target has the floating-point extension facility.
102   bool hasFPExtension() const { return HasFPExtension; }
103 
104   // Return true if the target has the population-count facility.
105   bool hasPopulationCount() const { return HasPopulationCount; }
106 
107   // Return true if the target has the fast-serialization facility.
108   bool hasFastSerialization() const { return HasFastSerialization; }
109 
110   // Return true if the target has interlocked-access facility 1.
111   bool hasInterlockedAccess1() const { return HasInterlockedAccess1; }
112 
113   // Return true if the target has the miscellaneous-extensions facility.
114   bool hasMiscellaneousExtensions() const {
115     return HasMiscellaneousExtensions;
116   }
117 
118   // Return true if the target has the execution-hint facility.
119   bool hasExecutionHint() const { return HasExecutionHint; }
120 
121   // Return true if the target has the load-and-trap facility.
122   bool hasLoadAndTrap() const { return HasLoadAndTrap; }
123 
124   // Return true if the target has the transactional-execution facility.
125   bool hasTransactionalExecution() const { return HasTransactionalExecution; }
126 
127   // Return true if the target has the processor-assist facility.
128   bool hasProcessorAssist() const { return HasProcessorAssist; }
129 
130   // Return true if the target has the load-and-zero-rightmost-byte facility.
131   bool hasLoadAndZeroRightmostByte() const {
132     return HasLoadAndZeroRightmostByte;
133   }
134 
135   // Return true if the target has the vector facility.
136   bool hasVector() const { return HasVector; }
137 
138   // Return true if GV can be accessed using LARL for reloc model RM
139   // and code model CM.
140   bool isPC32DBLSymbol(const GlobalValue *GV, CodeModel::Model CM) const;
141 
142   bool isTargetELF() const { return TargetTriple.isOSBinFormatELF(); }
143 };
144 } // end namespace llvm
145 
146 #endif
147