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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@9304 91177308-0d34-0410-b5e6-96231b3b80d8
97 lines
2.9 KiB
C++
97 lines
2.9 KiB
C++
//===- ExecutionEngine.h - Abstract Execution Engine Interface --*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file was developed by the LLVM research group and is distributed under
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// the University of Illinois Open Source License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines the abstract interface that implements execution support
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// for LLVM.
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//
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//===----------------------------------------------------------------------===//
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#ifndef EXECUTION_ENGINE_H
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#define EXECUTION_ENGINE_H
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#include <vector>
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#include <string>
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#include <map>
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#include <cassert>
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class Constant;
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class Function;
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union GenericValue;
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class GlobalValue;
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class Module;
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class ModuleProvider;
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class TargetData;
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class Type;
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class ExecutionEngine {
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Module &CurMod;
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const TargetData *TD;
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protected:
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ModuleProvider *MP;
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// GlobalAddress - A mapping between LLVM global values and their actualized
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// version...
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std::map<const GlobalValue*, void *> GlobalAddress;
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void setTargetData(const TargetData &td) {
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TD = &td;
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}
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public:
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ExecutionEngine(ModuleProvider *P);
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ExecutionEngine(Module *M);
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virtual ~ExecutionEngine();
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Module &getModule() const { return CurMod; }
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const TargetData &getTargetData() const { return *TD; }
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/// run - Start execution with the specified function, arguments, and
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/// environment.
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///
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virtual GenericValue run(Function *F,
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const std::vector<GenericValue> &ArgValues) = 0;
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static ExecutionEngine *create(ModuleProvider *MP, bool ForceInterpreter,
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bool TraceMode);
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void addGlobalMapping(const Function *F, void *Addr) {
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void *&CurVal = GlobalAddress[(const GlobalValue*)F];
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assert(CurVal == 0 && "GlobalMapping already established!");
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CurVal = Addr;
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}
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// getPointerToGlobalIfAvailable - This returns the address of the specified
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// global value if it is available, otherwise it returns null.
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//
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void *getPointerToGlobalIfAvailable(const GlobalValue *GV) {
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std::map<const GlobalValue*, void*>::iterator I = GlobalAddress.find(GV);
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return I != GlobalAddress.end() ? I->second : 0;
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}
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// getPointerToGlobal - This returns the address of the specified global
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// value. This may involve code generation if it's a function.
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//
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void *getPointerToGlobal(const GlobalValue *GV);
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// getPointerToFunction - The different EE's represent function bodies in
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// different ways. They should each implement this to say what a function
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// pointer should look like.
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//
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virtual void *getPointerToFunction(Function *F) = 0;
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void StoreValueToMemory(GenericValue Val, GenericValue *Ptr, const Type *Ty);
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void InitializeMemory(const Constant *Init, void *Addr);
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protected:
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void emitGlobals();
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GenericValue getConstantValue(const Constant *C);
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GenericValue LoadValueFromMemory(GenericValue *Ptr, const Type *Ty);
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};
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#endif
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