X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=examples%2FHowToUseJIT%2FHowToUseJIT.cpp;h=ec9c2e68541f5aac5e2f8d159543606302a32cf7;hb=9e6d1d1f5034347d237941f1bf08fba5c1583cd3;hp=e9100cffe6bbe8f7b03584cb8a9ea001b5c342c2;hpb=e8bf58c17085f6110d7f757d2417d7a96e9d329f;p=oota-llvm.git diff --git a/examples/HowToUseJIT/HowToUseJIT.cpp b/examples/HowToUseJIT/HowToUseJIT.cpp index e9100cffe6b..ec9c2e68541 100644 --- a/examples/HowToUseJIT/HowToUseJIT.cpp +++ b/examples/HowToUseJIT/HowToUseJIT.cpp @@ -1,109 +1,125 @@ -//===--- HowToUseJIT.cpp - An example use of the JIT ----------------------===// -// +//===-- examples/HowToUseJIT/HowToUseJIT.cpp - An example use of the JIT --===// +// // The LLVM Compiler Infrastructure // -// This file was developed by Valery A. Khamenya and is distributed under the -// University of Illinois Open Source License. See LICENSE.TXT for details. -// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// //===----------------------------------------------------------------------===// // // This small program provides an example of how to quickly build a small -// module with two functions and execute it with the JIT. -// -// Goal: +// module with two functions and execute it with the JIT. +// +// Goal: // The goal of this snippet is to create in the memory // the LLVM module consisting of two functions as follow: // // int add1(int x) { // return x+1; // } -// +// // int foo() { // return add1(10); // } -// -// then compile the module via JIT, then execute the `foo' +// +// then compile the module via JIT, then execute the `foo' // function and return result to a driver, i.e. to a "host program". -// +// // Some remarks and questions: -// +// // - could we invoke some code using noname functions too? -// e.g. evaluate "foo()+foo()" without fears to introduce +// e.g. evaluate "foo()+foo()" without fears to introduce // conflict of temporary function name with some real // existing function name? -// +// //===----------------------------------------------------------------------===// +#include "llvm/LLVMContext.h" #include "llvm/Module.h" #include "llvm/Constants.h" -#include "llvm/Type.h" +#include "llvm/DerivedTypes.h" #include "llvm/Instructions.h" #include "llvm/ModuleProvider.h" -#include "llvm/ExecutionEngine/ExecutionEngine.h" +#include "llvm/ExecutionEngine/JIT.h" +#include "llvm/ExecutionEngine/Interpreter.h" #include "llvm/ExecutionEngine/GenericValue.h" -#include +#include "llvm/Target/TargetSelect.h" +#include "llvm/Support/ManagedStatic.h" +#include "llvm/Support/raw_ostream.h" using namespace llvm; int main() { + + InitializeNativeTarget(); + + LLVMContext Context; + // Create some module to put our function into it. - Module *M = new Module("test"); + Module *M = new Module("test", Context); // Create the add1 function entry and insert this entry into module M. The // function will have a return type of "int" and take an argument of "int". // The '0' terminates the list of argument types. - Function *Add1F = M->getOrInsertFunction("add1", Type::IntTy, Type::IntTy, 0); + Function *Add1F = + cast(M->getOrInsertFunction("add1", Type::getInt32Ty(Context), + Type::getInt32Ty(Context), + (Type *)0)); // Add a basic block to the function. As before, it automatically inserts // because of the last argument. - BasicBlock *BB = new BasicBlock("EntryBlock", Add1F); - + BasicBlock *BB = BasicBlock::Create(Context, "EntryBlock", Add1F); + // Get pointers to the constant `1'. - Value *One = ConstantSInt::get(Type::IntTy, 1); + Value *One = ConstantInt::get(Type::getInt32Ty(Context), 1); // Get pointers to the integer argument of the add1 function... - assert(Add1F->abegin() != Add1F->aend()); // Make sure there's an arg - Argument *ArgX = Add1F->abegin(); // Get the arg + assert(Add1F->arg_begin() != Add1F->arg_end()); // Make sure there's an arg + Argument *ArgX = Add1F->arg_begin(); // Get the arg ArgX->setName("AnArg"); // Give it a nice symbolic name for fun. // Create the add instruction, inserting it into the end of BB. - Instruction *Add = BinaryOperator::createAdd(One, ArgX, "addresult", BB); - + Instruction *Add = BinaryOperator::CreateAdd(One, ArgX, "addresult", BB); + // Create the return instruction and add it to the basic block - new ReturnInst(Add, BB); + ReturnInst::Create(Context, Add, BB); // Now, function add1 is ready. // Now we going to create function `foo', which returns an int and takes no // arguments. - Function *FooF = M->getOrInsertFunction("foo", Type::IntTy, 0); + Function *FooF = + cast(M->getOrInsertFunction("foo", Type::getInt32Ty(Context), + (Type *)0)); // Add a basic block to the FooF function. - BB = new BasicBlock("EntryBlock", FooF); + BB = BasicBlock::Create(Context, "EntryBlock", FooF); // Get pointers to the constant `10'. - Value *Ten = ConstantSInt::get(Type::IntTy, 10); + Value *Ten = ConstantInt::get(Type::getInt32Ty(Context), 10); // Pass Ten to the call call: - std::vector Params; - Params.push_back(Ten); - CallInst * Add1CallRes = new CallInst(Add1F, Params, "add1", BB); - + CallInst *Add1CallRes = CallInst::Create(Add1F, Ten, "add1", BB); + Add1CallRes->setTailCall(true); + // Create the return instruction and add it to the basic block. - new ReturnInst(Add1CallRes, BB); + ReturnInst::Create(Context, Add1CallRes, BB); // Now we create the JIT. - ExistingModuleProvider* MP = new ExistingModuleProvider(M); - ExecutionEngine* EE = ExecutionEngine::create(MP, true); + ExecutionEngine* EE = EngineBuilder(M).create(); - std::cout << "We just constructed this LLVM module:\n\n" << *M; - std::cout << "\n\nRunning foo: " << std::flush; + outs() << "We just constructed this LLVM module:\n\n" << *M; + outs() << "\n\nRunning foo: "; + outs().flush(); // Call the `foo' function with no arguments: std::vector noargs; GenericValue gv = EE->runFunction(FooF, noargs); // Import result of execution: - std::cout << "Result: " << gv.IntVal << "\n"; + outs() << "Result: " << gv.IntVal << "\n"; + EE->freeMachineCodeForFunction(FooF); + delete EE; + llvm_shutdown(); return 0; }