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