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 SYSTEMZSUBTARGET_H
15 #define SYSTEMZSUBTARGET_H
16 
17 #include "llvm/ADT/Triple.h"
18 #include "llvm/Target/TargetSubtargetInfo.h"
19 #include <string>
20 
21 #define GET_SUBTARGETINFO_HEADER
22 #include "SystemZGenSubtargetInfo.inc"
23 
24 namespace llvm {
25 class GlobalValue;
26 class StringRef;
27 
28 class SystemZSubtarget : public SystemZGenSubtargetInfo {
29   virtual void anchor();
30 protected:
31   bool HasDistinctOps;
32   bool HasLoadStoreOnCond;
33   bool HasHighWord;
34   bool HasFPExtension;
35 
36 private:
37   Triple TargetTriple;
38 
39 public:
40   SystemZSubtarget(const std::string &TT, const std::string &CPU,
41                    const std::string &FS);
42 
43   // This is important for reducing register pressure in vector code.
useAA()44   virtual bool useAA() const LLVM_OVERRIDE { return true; }
45 
46   // Automatically generated by tblgen.
47   void ParseSubtargetFeatures(StringRef CPU, StringRef FS);
48 
49   // Return true if the target has the distinct-operands facility.
hasDistinctOps()50   bool hasDistinctOps() const { return HasDistinctOps; }
51 
52   // Return true if the target has the load/store-on-condition facility.
hasLoadStoreOnCond()53   bool hasLoadStoreOnCond() const { return HasLoadStoreOnCond; }
54 
55   // Return true if the target has the high-word facility.
hasHighWord()56   bool hasHighWord() const { return HasHighWord; }
57 
58   // Return true if the target has the floating-point extension facility.
hasFPExtension()59   bool hasFPExtension() const { return HasFPExtension; }
60 
61   // Return true if GV can be accessed using LARL for reloc model RM
62   // and code model CM.
63   bool isPC32DBLSymbol(const GlobalValue *GV, Reloc::Model RM,
64                        CodeModel::Model CM) const;
65 
isTargetELF()66   bool isTargetELF() const { return TargetTriple.isOSBinFormatELF(); }
67 };
68 } // end namespace llvm
69 
70 #endif
71