1 //===-- llvm/Target/TargetMachine.h - Target Information --------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file was developed by the LLVM research group and is distributed under
6 // the University of Illinois Open Source License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file describes the general parts of a Target machine.
12 //===----------------------------------------------------------------------===//
14 #ifndef LLVM_TARGET_TARGETMACHINE_H
15 #define LLVM_TARGET_TARGETMACHINE_H
17 #include "llvm/Target/TargetData.h"
22 class TargetInstrInfo;
23 class TargetInstrDescriptor;
25 class TargetSchedInfo;
27 class TargetFrameInfo;
28 class MachineCodeEmitter;
30 class FunctionPassManager;
33 class IntrinsicLowering;
35 //===----------------------------------------------------------------------===//
37 /// TargetMachine - Primary interface to the complete machine description for
38 /// the target machine. All target-specific information should be accessible
39 /// through this interface.
42 const std::string Name;
43 const TargetData DataLayout; // Calculates type size & alignment
44 IntrinsicLowering *IL; // Specifies how to lower intrinsic calls
46 TargetMachine(const TargetMachine&); // DO NOT IMPLEMENT
47 void operator=(const TargetMachine&); // DO NOT IMPLEMENT
48 protected: // Can only create subclasses...
49 TargetMachine(const std::string &name, IntrinsicLowering *IL,
50 bool LittleEndian = false,
51 unsigned char PtrSize = 8, unsigned char PtrAl = 8,
52 unsigned char DoubleAl = 8, unsigned char FloatAl = 4,
53 unsigned char LongAl = 8, unsigned char IntAl = 4,
54 unsigned char ShortAl = 2, unsigned char ByteAl = 1);
56 // This constructor is used for targets that support arbitrary TargetData
57 // layouts, like the C backend. It initializes the TargetData to match that
58 // of the specified module.
59 TargetMachine(const std::string &name, IntrinsicLowering *IL,
62 virtual ~TargetMachine();
64 const std::string &getName() const { return Name; }
66 // getIntrinsicLowering - This method returns a reference to an
67 // IntrinsicLowering instance which should be used by the code generator to
68 // lower unknown intrinsic functions to the equivalent LLVM expansion.
69 IntrinsicLowering &getIntrinsicLowering() const { return *IL; }
71 // Interfaces to the major aspects of target machine information:
72 // -- Instruction opcode and operand information
73 // -- Pipelines and scheduling information
74 // -- Register information
75 // -- Stack frame information
76 // -- Cache hierarchy information
77 // -- Machine-level optimization information (peephole only)
79 virtual const TargetInstrInfo& getInstrInfo() const = 0;
80 virtual const TargetSchedInfo& getSchedInfo() const = 0;
81 virtual const TargetRegInfo& getRegInfo() const = 0;
82 virtual const TargetFrameInfo& getFrameInfo() const = 0;
83 const TargetData &getTargetData() const { return DataLayout; }
85 /// getRegisterInfo - If register information is available, return it. If
86 /// not, return null. This is kept separate from RegInfo until RegInfo has
87 /// details of graph coloring register allocation removed from it.
89 virtual const MRegisterInfo* getRegisterInfo() const { return 0; }
91 /// getJITInfo - If this target supports a JIT, return information for it,
92 /// otherwise return null.
94 virtual TargetJITInfo *getJITInfo() { return 0; }
96 // Data storage information. FIXME, this should be moved out to sparc
99 virtual unsigned findOptimalStorageSize(const Type* ty) const;
101 /// addPassesToEmitAssembly - Add passes to the specified pass manager to get
102 /// assembly langage code emitted. Typically this will involve several steps
103 /// of code generation. This method should return true if assembly emission
104 /// is not supported.
106 virtual bool addPassesToEmitAssembly(PassManager &PM, std::ostream &Out) {
110 /// addPassesToEmitMachineCode - Add passes to the specified pass manager to
111 /// get machine code emitted. This uses a MachineCodeEmitter object to handle
112 /// actually outputting the machine code and resolving things like the address
113 /// of functions. This method should returns true if machine code emission is
116 virtual bool addPassesToEmitMachineCode(FunctionPassManager &PM,
117 MachineCodeEmitter &MCE) {
122 } // End llvm namespace