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/ADT/Triple.h"
22 #include "llvm/CodeGen/TargetSubtargetInfo.h"
23 #include "llvm/IR/DataLayout.h"
24 #include <string>
25 
26 #define GET_SUBTARGETINFO_HEADER
27 #include "SystemZGenSubtargetInfo.inc"
28 
29 namespace llvm {
30 class GlobalValue;
31 class StringRef;
32 
33 class SystemZSubtarget : public SystemZGenSubtargetInfo {
34   virtual void anchor();
35 protected:
36   bool HasDistinctOps;
37   bool HasLoadStoreOnCond;
38   bool HasHighWord;
39   bool HasFPExtension;
40   bool HasPopulationCount;
41   bool HasMessageSecurityAssist3;
42   bool HasMessageSecurityAssist4;
43   bool HasResetReferenceBitsMultiple;
44   bool HasFastSerialization;
45   bool HasInterlockedAccess1;
46   bool HasMiscellaneousExtensions;
47   bool HasExecutionHint;
48   bool HasLoadAndTrap;
49   bool HasTransactionalExecution;
50   bool HasProcessorAssist;
51   bool HasDFPZonedConversion;
52   bool HasEnhancedDAT2;
53   bool HasVector;
54   bool HasLoadStoreOnCond2;
55   bool HasLoadAndZeroRightmostByte;
56   bool HasMessageSecurityAssist5;
57   bool HasDFPPackedConversion;
58   bool HasMiscellaneousExtensions2;
59   bool HasGuardedStorage;
60   bool HasMessageSecurityAssist7;
61   bool HasMessageSecurityAssist8;
62   bool HasVectorEnhancements1;
63   bool HasVectorPackedDecimal;
64   bool HasInsertReferenceBitsMultiple;
65 
66 private:
67   Triple TargetTriple;
68   SystemZInstrInfo InstrInfo;
69   SystemZTargetLowering TLInfo;
70   SystemZSelectionDAGInfo TSInfo;
71   SystemZFrameLowering FrameLowering;
72 
73   SystemZSubtarget &initializeSubtargetDependencies(StringRef CPU,
74                                                     StringRef FS);
75 public:
76   SystemZSubtarget(const Triple &TT, const std::string &CPU,
77                    const std::string &FS, const TargetMachine &TM);
78 
79   const TargetFrameLowering *getFrameLowering() const override {
80     return &FrameLowering;
81   }
82   const SystemZInstrInfo *getInstrInfo() const override { return &InstrInfo; }
83   const SystemZRegisterInfo *getRegisterInfo() const override {
84     return &InstrInfo.getRegisterInfo();
85   }
86   const SystemZTargetLowering *getTargetLowering() const override {
87     return &TLInfo;
88   }
89   const SelectionDAGTargetInfo *getSelectionDAGInfo() const override {
90     return &TSInfo;
91   }
92 
93   // True if the subtarget should run MachineScheduler after aggressive
94   // coalescing. This currently replaces the SelectionDAG scheduler with the
95   // "source" order scheduler.
96   bool enableMachineScheduler() const override { return true; }
97 
98   // This is important for reducing register pressure in vector code.
99   bool useAA() const override { return true; }
100 
101   // Always enable the early if-conversion pass.
102   bool enableEarlyIfConversion() const override { return true; }
103 
104   // Enable tracking of subregister liveness in register allocator.
105   bool enableSubRegLiveness() const override;
106 
107   // Automatically generated by tblgen.
108   void ParseSubtargetFeatures(StringRef CPU, StringRef FS);
109 
110   // Return true if the target has the distinct-operands facility.
111   bool hasDistinctOps() const { return HasDistinctOps; }
112 
113   // Return true if the target has the load/store-on-condition facility.
114   bool hasLoadStoreOnCond() const { return HasLoadStoreOnCond; }
115 
116   // Return true if the target has the load/store-on-condition facility 2.
117   bool hasLoadStoreOnCond2() const { return HasLoadStoreOnCond2; }
118 
119   // Return true if the target has the high-word facility.
120   bool hasHighWord() const { return HasHighWord; }
121 
122   // Return true if the target has the floating-point extension facility.
123   bool hasFPExtension() const { return HasFPExtension; }
124 
125   // Return true if the target has the population-count facility.
126   bool hasPopulationCount() const { return HasPopulationCount; }
127 
128   // Return true if the target has the message-security-assist
129   // extension facility 3.
130   bool hasMessageSecurityAssist3() const { return HasMessageSecurityAssist3; }
131 
132   // Return true if the target has the message-security-assist
133   // extension facility 4.
134   bool hasMessageSecurityAssist4() const { return HasMessageSecurityAssist4; }
135 
136   // Return true if the target has the reset-reference-bits-multiple facility.
137   bool hasResetReferenceBitsMultiple() const {
138     return HasResetReferenceBitsMultiple;
139   }
140 
141   // Return true if the target has the fast-serialization facility.
142   bool hasFastSerialization() const { return HasFastSerialization; }
143 
144   // Return true if the target has interlocked-access facility 1.
145   bool hasInterlockedAccess1() const { return HasInterlockedAccess1; }
146 
147   // Return true if the target has the miscellaneous-extensions facility.
148   bool hasMiscellaneousExtensions() const {
149     return HasMiscellaneousExtensions;
150   }
151 
152   // Return true if the target has the execution-hint facility.
153   bool hasExecutionHint() const { return HasExecutionHint; }
154 
155   // Return true if the target has the load-and-trap facility.
156   bool hasLoadAndTrap() const { return HasLoadAndTrap; }
157 
158   // Return true if the target has the transactional-execution facility.
159   bool hasTransactionalExecution() const { return HasTransactionalExecution; }
160 
161   // Return true if the target has the processor-assist facility.
162   bool hasProcessorAssist() const { return HasProcessorAssist; }
163 
164   // Return true if the target has the DFP zoned-conversion facility.
165   bool hasDFPZonedConversion() const { return HasDFPZonedConversion; }
166 
167   // Return true if the target has the enhanced-DAT facility 2.
168   bool hasEnhancedDAT2() const { return HasEnhancedDAT2; }
169 
170   // Return true if the target has the load-and-zero-rightmost-byte facility.
171   bool hasLoadAndZeroRightmostByte() const {
172     return HasLoadAndZeroRightmostByte;
173   }
174 
175   // Return true if the target has the message-security-assist
176   // extension facility 5.
177   bool hasMessageSecurityAssist5() const { return HasMessageSecurityAssist5; }
178 
179   // Return true if the target has the DFP packed-conversion facility.
180   bool hasDFPPackedConversion() const { return HasDFPPackedConversion; }
181 
182   // Return true if the target has the vector facility.
183   bool hasVector() const { return HasVector; }
184 
185   // Return true if the target has the miscellaneous-extensions facility 2.
186   bool hasMiscellaneousExtensions2() const {
187     return HasMiscellaneousExtensions2;
188   }
189 
190   // Return true if the target has the guarded-storage facility.
191   bool hasGuardedStorage() const { return HasGuardedStorage; }
192 
193   // Return true if the target has the message-security-assist
194   // extension facility 7.
195   bool hasMessageSecurityAssist7() const { return HasMessageSecurityAssist7; }
196 
197   // Return true if the target has the message-security-assist
198   // extension facility 8.
199   bool hasMessageSecurityAssist8() const { return HasMessageSecurityAssist8; }
200 
201   // Return true if the target has the vector-enhancements facility 1.
202   bool hasVectorEnhancements1() const { return HasVectorEnhancements1; }
203 
204   // Return true if the target has the vector-packed-decimal facility.
205   bool hasVectorPackedDecimal() const { return HasVectorPackedDecimal; }
206 
207   // Return true if the target has the insert-reference-bits-multiple facility.
208   bool hasInsertReferenceBitsMultiple() const {
209     return HasInsertReferenceBitsMultiple;
210   }
211 
212   // Return true if GV can be accessed using LARL for reloc model RM
213   // and code model CM.
214   bool isPC32DBLSymbol(const GlobalValue *GV, CodeModel::Model CM) const;
215 
216   bool isTargetELF() const { return TargetTriple.isOSBinFormatELF(); }
217 };
218 } // end namespace llvm
219 
220 #endif
221