//===-- 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/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 <iostream>
using namespace llvm;
// 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<Function>(M->getOrInsertFunction("add1", Type::Int32Ty, Type::Int32Ty,
+ (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("EntryBlock", Add1F);
+
// Get pointers to the constant `1'.
- Value *One = ConstantSInt::get(Type::IntTy, 1);
+ Value *One = ConstantInt::get(Type::Int32Ty, 1);
// Get pointers to the integer argument of the add1 function...
assert(Add1F->arg_begin() != Add1F->arg_end()); // Make sure there's an arg
// Create the add instruction, inserting it into the end of 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(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<Function>(M->getOrInsertFunction("foo", Type::Int32Ty, (Type *)0));
// Add a basic block to the FooF function.
- BB = new BasicBlock("EntryBlock", FooF);
+ BB = BasicBlock::Create("EntryBlock", FooF);
// Get pointers to the constant `10'.
- Value *Ten = ConstantSInt::get(Type::IntTy, 10);
+ Value *Ten = ConstantInt::get(Type::Int32Ty, 10);
// Pass Ten to the call call:
- std::vector<Value*> 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(Add1CallRes, BB);
// Now we create the JIT.
ExistingModuleProvider* MP = new ExistingModuleProvider(M);
GenericValue gv = EE->runFunction(FooF, noargs);
// Import result of execution:
- std::cout << "Result: " << gv.IntVal << "\n";
+ std::cout << "Result: " << gv.IntVal.toStringUnsigned(10) << "\n";
return 0;
}