mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-24 19:52:54 +01:00
129 lines
4.0 KiB
C++
129 lines
4.0 KiB
C++
//===-- JIT.h - Class definition for the JIT --------------------*- 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 defines the top-level JIT data structure.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef JIT_H
|
|
#define JIT_H
|
|
|
|
#include "llvm/ExecutionEngine/ExecutionEngine.h"
|
|
#include "llvm/PassManager.h"
|
|
#include <map>
|
|
|
|
namespace llvm {
|
|
|
|
class Function;
|
|
class GlobalValue;
|
|
class Constant;
|
|
class TargetMachine;
|
|
class TargetJITInfo;
|
|
class MachineCodeEmitter;
|
|
|
|
class JITState {
|
|
private:
|
|
FunctionPassManager PM; // Passes to compile a function
|
|
|
|
/// PendingGlobals - Global variables which have had memory allocated for them
|
|
/// while a function was code generated, but which have not been initialized
|
|
/// yet.
|
|
std::vector<const GlobalVariable*> PendingGlobals;
|
|
|
|
public:
|
|
JITState(ModuleProvider *MP) : PM(MP) {}
|
|
|
|
FunctionPassManager& getPM(const MutexGuard& locked) {
|
|
return PM;
|
|
}
|
|
|
|
std::vector<const GlobalVariable*>& getPendingGlobals(const MutexGuard& locked) {
|
|
return PendingGlobals;
|
|
}
|
|
};
|
|
|
|
|
|
class JIT : public ExecutionEngine {
|
|
TargetMachine &TM; // The current target we are compiling to
|
|
TargetJITInfo &TJI; // The JITInfo for the target we are compiling to
|
|
MachineCodeEmitter *MCE; // MCE object
|
|
|
|
JITState state;
|
|
|
|
JIT(ModuleProvider *MP, TargetMachine &tm, TargetJITInfo &tji);
|
|
public:
|
|
~JIT();
|
|
|
|
static void Register() {
|
|
JITCtor = create;
|
|
}
|
|
|
|
/// getJITInfo - Return the target JIT information structure.
|
|
///
|
|
TargetJITInfo &getJITInfo() const { return TJI; }
|
|
|
|
/// create - Create an return a new JIT compiler if there is one available
|
|
/// for the current target. Otherwise, return null.
|
|
///
|
|
static ExecutionEngine *create(ModuleProvider *MP);
|
|
|
|
/// run - Start execution with the specified function and arguments.
|
|
///
|
|
virtual GenericValue runFunction(Function *F,
|
|
const std::vector<GenericValue> &ArgValues);
|
|
|
|
/// getPointerToNamedFunction - This method returns the address of the
|
|
/// specified function by using the dlsym function call. As such it is only
|
|
/// useful for resolving library symbols, not code generated symbols.
|
|
///
|
|
void *getPointerToNamedFunction(const std::string &Name);
|
|
|
|
// CompilationCallback - Invoked the first time that a call site is found,
|
|
// which causes lazy compilation of the target function.
|
|
//
|
|
static void CompilationCallback();
|
|
|
|
/// getPointerToFunction - This returns the address of the specified function,
|
|
/// compiling it if necessary.
|
|
///
|
|
void *getPointerToFunction(Function *F);
|
|
|
|
/// getOrEmitGlobalVariable - Return the address of the specified global
|
|
/// variable, possibly emitting it to memory if needed. This is used by the
|
|
/// Emitter.
|
|
void *getOrEmitGlobalVariable(const GlobalVariable *GV);
|
|
|
|
/// getPointerToFunctionOrStub - If the specified function has been
|
|
/// code-gen'd, return a pointer to the function. If not, compile it, or use
|
|
/// a stub to implement lazy compilation if available.
|
|
///
|
|
void *getPointerToFunctionOrStub(Function *F);
|
|
|
|
/// recompileAndRelinkFunction - This method is used to force a function
|
|
/// which has already been compiled, to be compiled again, possibly
|
|
/// after it has been modified. Then the entry to the old copy is overwritten
|
|
/// with a branch to the new copy. If there was no old copy, this acts
|
|
/// just like JIT::getPointerToFunction().
|
|
///
|
|
void *recompileAndRelinkFunction(Function *F);
|
|
|
|
/// freeMachineCodeForFunction - deallocate memory used to code-generate this
|
|
/// Function.
|
|
///
|
|
void freeMachineCodeForFunction(Function *F);
|
|
|
|
private:
|
|
static MachineCodeEmitter *createEmitter(JIT &J);
|
|
void runJITOnFunction (Function *F);
|
|
};
|
|
|
|
} // End llvm namespace
|
|
|
|
#endif
|