-//===-- 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;
-class MachineOptInfo;
+#include "llvm/Target/TargetInstrItineraries.h"
+#include <cassert>
+
+namespace llvm {
+
+class TargetSubtarget;
+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 {
+//===----------------------------------------------------------------------===//
+///
+/// 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
+
+ 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);
+
+ /// getSubtargetImpl - virtual method implemented by subclasses that returns
+ /// a reference to that target's TargetSubtarget-derived member variable.
+ virtual const TargetSubtarget *getSubtargetImpl() const { return 0; }
public:
- const TargetData DataLayout; // Calculates type size & alignment
-
-protected:
- TargetMachine(const std::string &name, // Can only create subclasses...
- unsigned char SubWordSize = 1, 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)
- : Name(name), DataLayout(name, SubWordSize, IntRegSize, PtrSize, PtrAl,
- DoubleAl, FloatAl, LongAl,
- IntAl, ShortAl, ByteAl) {}
-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
// -- Stack frame information
- // -- Cache hierarchy information
- // -- Machine-level optimization information (peephole only)
- //
- 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;
- virtual const MachineOptInfo& getOptInfo() const = 0;
-
- // Data storage information
- //
- virtual unsigned findOptimalStorageSize(const Type* ty) const;
+ //
+ virtual const TargetInstrInfo *getInstrInfo() const { return 0; }
+ virtual const TargetFrameInfo *getFrameInfo() const { return 0; }
+ const TargetData &getTargetData() const { return DataLayout; }
+
+ /// getSubtarget - This method returns a pointer to the specified type of
+ /// TargetSubtarget. In debug builds, it verifies that the object being
+ /// returned is of the correct type.
+ template<typename STC> const STC &getSubtarget() const {
+ const TargetSubtarget *TST = getSubtargetImpl();
+ assert(TST && dynamic_cast<const STC*>(TST) &&
+ "Not the right kind of subtarget!");
+ return *static_cast<const STC*>(TST);
+ }
+
+ /// 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; }
+
+ /// getJITInfo - If this target supports a JIT, return information for it,
+ /// otherwise return null.
+ ///
+ virtual TargetJITInfo *getJITInfo() { return 0; }
- /// addPassesToEmitAssembly - Add passes to the specified pass manager to get
- /// assembly langage code emited. Typically this will involve several steps
- /// of code generation. This method should return true if code generation is
- /// not supported.
+ /// getInstrItineraryData - Returns instruction itinerary data for the target
+ /// or specific subtarget.
///
- virtual bool addPassesToEmitAssembly(PassManager &PM, std::ostream &Out) {
+ virtual const InstrItineraryData getInstrItineraryData() const {
+ return InstrItineraryData();
+ }
+
+ // These are deprecated interfaces.
+ virtual const TargetSchedInfo *getSchedInfo() const { return 0; }
+ virtual const SparcV9RegInfo *getRegInfo() const { return 0; }
+
+ /// CodeGenFileType - These enums are meant to be passed into
+ /// addPassesToEmitFile to indicate what type of file to emit.
+ enum CodeGenFileType {
+ AssemblyFile, ObjectFile, DynamicLibrary
+ };
+
+ /// addPassesToEmitFile - Add passes to the specified pass manager to get
+ /// the specified file emitted. Typically this will involve several steps of
+ /// code generation. If Fast is set to true, the code generator should emit
+ /// code as fast as possible, without regard for compile time. This method
+ /// should return true if emission of this file type is not supported.
+ ///
+ virtual bool addPassesToEmitFile(PassManager &PM, std::ostream &Out,
+ CodeGenFileType FileType, bool Fast) {
return true;
}
- /// addPassesToJITCompile - Add passes to the specified pass manager to
- /// implement a fast dynamic compiler for this target. Return true if this is
- /// not supported for this target.
+ /// 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 addPassesToJITCompile(PassManager &PM) { return true; }
+ virtual bool addPassesToEmitMachineCode(FunctionPassManager &PM,
+ MachineCodeEmitter &MCE) {
+ return true;
+ }
};
+} // End llvm namespace
+
#endif
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