+++ /dev/null
-//===-- JIT.h - Class definition for the JIT --------------------*- C++ -*-===//
-//
-// The LLVM Compiler Infrastructure
-//
-// This file 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 LLVM_LIB_EXECUTIONENGINE_JIT_JIT_H
-#define LLVM_LIB_EXECUTIONENGINE_JIT_JIT_H
-
-#include "llvm/ExecutionEngine/ExecutionEngine.h"
-#include "llvm/IR/ValueHandle.h"
-#include "llvm/PassManager.h"
-
-namespace llvm {
-
-class Function;
-struct JITEvent_EmittedFunctionDetails;
-class MachineCodeEmitter;
-class MachineCodeInfo;
-class TargetJITInfo;
-class TargetMachine;
-
-class JITState {
-private:
- FunctionPassManager PM; // Passes to compile a function
- Module *M; // Module used to create the PM
-
- /// PendingFunctions - Functions which have not been code generated yet, but
- /// were called from a function being code generated.
- std::vector<AssertingVH<Function> > PendingFunctions;
-
-public:
- explicit JITState(Module *M) : PM(M), M(M) {}
-
- FunctionPassManager &getPM() {
- return PM;
- }
-
- Module *getModule() const { return M; }
- std::vector<AssertingVH<Function> > &getPendingFunctions() {
- return PendingFunctions;
- }
-};
-
-
-class JIT : public ExecutionEngine {
- /// types
- typedef ValueMap<const BasicBlock *, void *>
- BasicBlockAddressMapTy;
- /// data
- TargetMachine &TM; // The current target we are compiling to
- TargetJITInfo &TJI; // The JITInfo for the target we are compiling to
- JITCodeEmitter *JCE; // JCE object
- JITMemoryManager *JMM;
- std::vector<JITEventListener*> EventListeners;
-
- /// AllocateGVsWithCode - Some applications require that global variables and
- /// code be allocated into the same region of memory, in which case this flag
- /// should be set to true. Doing so breaks freeMachineCodeForFunction.
- bool AllocateGVsWithCode;
-
- /// True while the JIT is generating code. Used to assert against recursive
- /// entry.
- bool isAlreadyCodeGenerating;
-
- JITState *jitstate;
-
- /// BasicBlockAddressMap - A mapping between LLVM basic blocks and their
- /// actualized version, only filled for basic blocks that have their address
- /// taken.
- BasicBlockAddressMapTy BasicBlockAddressMap;
-
-
- JIT(std::unique_ptr<Module> M, TargetMachine &tm, TargetJITInfo &tji,
- JITMemoryManager *JMM, bool AllocateGVsWithCode);
-public:
- ~JIT();
-
- static void Register() {
- JITCtor = createJIT;
- }
-
- /// getJITInfo - Return the target JIT information structure.
- ///
- TargetJITInfo &getJITInfo() const { return TJI; }
-
- void addModule(std::unique_ptr<Module> M) override;
-
- /// removeModule - Remove a Module from the list of modules. Returns true if
- /// M is found.
- bool removeModule(Module *M) override;
-
- /// runFunction - Start execution with the specified function and arguments.
- ///
- GenericValue runFunction(Function *F,
- const std::vector<GenericValue> &ArgValues) override;
-
- /// getPointerToNamedFunction - This method returns the address of the
- /// specified function by using the MemoryManager. As such it is only
- /// useful for resolving library symbols, not code generated symbols.
- ///
- /// If AbortOnFailure is false and no function with the given name is
- /// found, this function silently returns a null pointer. Otherwise,
- /// it prints a message to stderr and aborts.
- ///
- void *getPointerToNamedFunction(const std::string &Name,
- bool AbortOnFailure = true) override;
-
- // 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) override;
-
- /// addPointerToBasicBlock - Adds address of the specific basic block.
- void addPointerToBasicBlock(const BasicBlock *BB, void *Addr);
-
- /// clearPointerToBasicBlock - Removes address of specific basic block.
- void clearPointerToBasicBlock(const BasicBlock *BB);
-
- /// getPointerToBasicBlock - This returns the address of the specified basic
- /// block, assuming function is compiled.
- void *getPointerToBasicBlock(BasicBlock *BB) override;
-
- /// 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) override;
-
- /// 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) override;
-
- /// 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) override;
-
- /// freeMachineCodeForFunction - deallocate memory used to code-generate this
- /// Function.
- ///
- void freeMachineCodeForFunction(Function *F) override;
-
- /// addPendingFunction - while jitting non-lazily, a called but non-codegen'd
- /// function was encountered. Add it to a pending list to be processed after
- /// the current function.
- ///
- void addPendingFunction(Function *F);
-
- /// getCodeEmitter - Return the code emitter this JIT is emitting into.
- ///
- JITCodeEmitter *getCodeEmitter() const { return JCE; }
-
- static ExecutionEngine *createJIT(std::unique_ptr<Module> M,
- std::string *ErrorStr,
- JITMemoryManager *JMM,
- bool GVsWithCode,
- TargetMachine *TM);
-
- // Run the JIT on F and return information about the generated code
- void runJITOnFunction(Function *F, MachineCodeInfo *MCI = nullptr) override;
-
- void RegisterJITEventListener(JITEventListener *L) override;
- void UnregisterJITEventListener(JITEventListener *L) override;
-
- TargetMachine *getTargetMachine() override { return &TM; }
-
- /// These functions correspond to the methods on JITEventListener. They
- /// iterate over the registered listeners and call the corresponding method on
- /// each.
- void NotifyFunctionEmitted(
- const Function &F, void *Code, size_t Size,
- const JITEvent_EmittedFunctionDetails &Details);
- void NotifyFreeingMachineCode(void *OldPtr);
-
- BasicBlockAddressMapTy &
- getBasicBlockAddressMap() {
- return BasicBlockAddressMap;
- }
-
-
-private:
- static JITCodeEmitter *createEmitter(JIT &J, JITMemoryManager *JMM,
- TargetMachine &tm);
- void runJITOnFunctionUnlocked(Function *F);
- void updateFunctionStubUnlocked(Function *F);
- void jitTheFunctionUnlocked(Function *F);
-
-protected:
-
- /// getMemoryforGV - Allocate memory for a global variable.
- char* getMemoryForGV(const GlobalVariable* GV) override;
-
-};
-
-} // End llvm namespace
-
-#endif
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