-//===-- llvm/Target/Machine.h - General Target Information -------*- C++ -*-==//
+//===-- llvm/Target/TargetMachine.h - Target Information --------*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file was developed by the LLVM research group and is distributed under
+// the University of Illinois Open Source License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
//
// This file describes the general parts of a Target machine.
//
#define LLVM_TARGET_TARGETMACHINE_H
#include "llvm/Target/TargetData.h"
-#include "Support/NonCopyable.h"
-
-class MachineInstrInfo;
-class MachineInstrDescriptor;
-class MachineSchedInfo;
-class MachineRegInfo;
-class MachineFrameInfo;
-class MachineCacheInfo;
+#include <cassert>
+
+namespace llvm {
+
+class TargetInstrInfo;
+class TargetInstrDescriptor;
+class TargetJITInfo;
+class TargetSchedInfo;
+class SparcV9RegInfo;
+class TargetFrameInfo;
+class MachineCodeEmitter;
+class MRegisterInfo;
+class FunctionPassManager;
class PassManager;
class Pass;
+class IntrinsicLowering;
-//---------------------------------------------------------------------------
-// class TargetMachine
-//
-// Purpose:
-// Primary interface to the complete machine description for the
-// target machine. All target-specific information should be
-// accessible through this interface.
-//
-//---------------------------------------------------------------------------
-
-class TargetMachine : public NonCopyableV {
-public:
- const std::string TargetName;
- const TargetData DataLayout; // Calculates type size & alignment
- int optSizeForSubWordData;
- int minMemOpWordSize;
- int maxAtomicMemOpWordSize;
+//===----------------------------------------------------------------------===//
+///
+/// TargetMachine - Primary interface to the complete machine description for
+/// the target machine. All target-specific information should be accessible
+/// through this interface.
+///
+class TargetMachine {
+ const std::string Name;
+ const TargetData DataLayout; // Calculates type size & alignment
+ IntrinsicLowering *IL; // Specifies how to lower intrinsic calls
-protected:
- TargetMachine(const std::string &targetname, // Can only create subclasses...
- unsigned char IntRegSize = 8,
- unsigned char PtrSize = 8, unsigned char PtrAl = 8,
- unsigned char DoubleAl = 8, unsigned char FloatAl = 4,
- unsigned char LongAl = 8, unsigned char IntAl = 4,
- unsigned char ShortAl = 2, unsigned char ByteAl = 1)
- : TargetName(targetname), DataLayout(targetname, IntRegSize,
- PtrSize, PtrAl,
- DoubleAl, FloatAl, LongAl, IntAl,
- ShortAl, ByteAl) { }
+ TargetMachine(const TargetMachine&); // DO NOT IMPLEMENT
+ void operator=(const TargetMachine&); // DO NOT IMPLEMENT
+protected: // Can only create subclasses...
+ TargetMachine(const std::string &name, IntrinsicLowering *IL,
+ bool LittleEndian = false,
+ unsigned char PtrSize = 8, unsigned char PtrAl = 8,
+ unsigned char DoubleAl = 8, unsigned char FloatAl = 4,
+ unsigned char LongAl = 8, unsigned char IntAl = 4,
+ unsigned char ShortAl = 2, unsigned char ByteAl = 1,
+ unsigned char BoolAl = 1);
+
+ TargetMachine(const std::string &name, IntrinsicLowering *IL,
+ const TargetData &TD);
+
+ /// This constructor is used for targets that support arbitrary TargetData
+ /// layouts, like the C backend. It initializes the TargetData to match that
+ /// of the specified module.
+ ///
+ TargetMachine(const std::string &name, IntrinsicLowering *IL,
+ const Module &M);
public:
- virtual ~TargetMachine() {}
+ virtual ~TargetMachine();
+
+ /// getModuleMatchQuality - This static method should be implemented by
+ /// targets to indicate how closely they match the specified module. This is
+ /// used by the LLC tool to determine which target to use when an explicit
+ /// -march option is not specified. If a target returns zero, it will never
+ /// be chosen without an explicit -march option.
+ static unsigned getModuleMatchQuality(const Module &M) { return 0; }
+
+ /// getJITMatchQuality - This static method should be implemented by targets
+ /// that provide JIT capabilities to indicate how suitable they are for
+ /// execution on the current host. If a value of 0 is returned, the target
+ /// will not be used unless an explicit -march option is used.
+ static unsigned getJITMatchQuality() { return 0; }
+
+
+ const std::string &getName() const { return Name; }
+
+ /// getIntrinsicLowering - This method returns a reference to an
+ /// IntrinsicLowering instance which should be used by the code generator to
+ /// lower unknown intrinsic functions to the equivalent LLVM expansion.
+ ///
+ IntrinsicLowering &getIntrinsicLowering() const { return *IL; }
- //
// Interfaces to the major aspects of target machine information:
// -- Instruction opcode and operand information
// -- Pipelines and scheduling information
- // -- Register information
- //
- virtual const MachineInstrInfo& getInstrInfo() const = 0;
- virtual const MachineSchedInfo& getSchedInfo() const = 0;
- virtual const MachineRegInfo& getRegInfo() const = 0;
- virtual const MachineFrameInfo& getFrameInfo() const = 0;
- virtual const MachineCacheInfo& getCacheInfo() const = 0;
-
- // Data storage information
- //
- virtual unsigned int findOptimalStorageSize (const Type* ty) const;
-
- // addPassesToEmitAssembly - Add passes to the specified pass manager to get
- // assembly langage code emited. Typically this will involve several steps of
- // code generation. This provides a default ordering of passes that could
- // be overridden for a particular target.
- //
- virtual void addPassesToEmitAssembly(PassManager &PM, std::ostream &Out);
-
- // getPrologEpilogCodeInserter - Create pass to insert prolog/epilog code.
+ // -- Stack frame information
//
- virtual Pass* getPrologEpilogInsertionPass() = 0;
+ virtual const TargetInstrInfo *getInstrInfo() const { return 0; }
+ virtual const TargetFrameInfo *getFrameInfo() const { return 0; }
+ const TargetData &getTargetData() const { return DataLayout; }
- // getFunctionAsmPrinterPass - Create a pass to write out the generated
- // machine code for a single function to the generated assembly file.
- //
- virtual Pass* getFunctionAsmPrinterPass(std::ostream &Out) = 0;
+ /// getRegisterInfo - If register information is available, return it. If
+ /// not, return null. This is kept separate from RegInfo until RegInfo has
+ /// details of graph coloring register allocation removed from it.
+ ///
+ virtual const MRegisterInfo* getRegisterInfo() const { return 0; }
- // getModuleAsmPrinterPass - Create a pass to write out module-level
- // information to the generated assembly file.
- //
- virtual Pass* getModuleAsmPrinterPass(std::ostream &Out) = 0;
+ /// getJITInfo - If this target supports a JIT, return information for it,
+ /// otherwise return null.
+ ///
+ virtual TargetJITInfo *getJITInfo() { return 0; }
- // getEmitBytecodeToAsmPass - Create a pass to emit the final LLVM bytecode
- // to the generated assembly file.
- //
- virtual Pass* getEmitBytecodeToAsmPass(std::ostream &Out) = 0;
+ // These are deprecated interfaces.
+ virtual const TargetSchedInfo *getSchedInfo() const { return 0; }
+ virtual const SparcV9RegInfo *getRegInfo() const { return 0; }
+
+ /// addPassesToEmitAssembly - Add passes to the specified pass manager to get
+ /// assembly langage code emitted. Typically this will involve several steps
+ /// of code generation. This method should return true if assembly emission
+ /// is not supported.
+ ///
+ virtual bool addPassesToEmitAssembly(PassManager &PM, std::ostream &Out) {
+ return true;
+ }
+
+ /// addPassesToEmitMachineCode - Add passes to the specified pass manager to
+ /// get machine code emitted. This uses a MachineCodeEmitter object to handle
+ /// actually outputting the machine code and resolving things like the address
+ /// of functions. This method should returns true if machine code emission is
+ /// not supported.
+ ///
+ virtual bool addPassesToEmitMachineCode(FunctionPassManager &PM,
+ MachineCodeEmitter &MCE) {
+ return true;
+ }
};
+} // End llvm namespace
+
#endif