mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-24 03:33:20 +01:00
ae65e281f3
to reflect the new license. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. llvm-svn: 351636
70 lines
2.5 KiB
C++
70 lines
2.5 KiB
C++
//===- examples/ModuleMaker/ModuleMaker.cpp - Example project ---*- C++ -*-===//
|
|
//
|
|
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
|
// See https://llvm.org/LICENSE.txt for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This programs is a simple example that creates an LLVM module "from scratch",
|
|
// emitting it as a bitcode file to standard out. This is just to show how
|
|
// LLVM projects work and to demonstrate some of the LLVM APIs.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "llvm/Bitcode/BitcodeWriter.h"
|
|
#include "llvm/IR/BasicBlock.h"
|
|
#include "llvm/IR/Constants.h"
|
|
#include "llvm/IR/DerivedTypes.h"
|
|
#include "llvm/IR/Function.h"
|
|
#include "llvm/IR/InstrTypes.h"
|
|
#include "llvm/IR/Instruction.h"
|
|
#include "llvm/IR/Instructions.h"
|
|
#include "llvm/IR/LLVMContext.h"
|
|
#include "llvm/IR/Module.h"
|
|
#include "llvm/IR/Type.h"
|
|
#include "llvm/Support/raw_ostream.h"
|
|
|
|
using namespace llvm;
|
|
|
|
int main() {
|
|
LLVMContext Context;
|
|
|
|
// Create the "module" or "program" or "translation unit" to hold the
|
|
// function
|
|
Module *M = new Module("test", Context);
|
|
|
|
// Create the main function: first create the type 'int ()'
|
|
FunctionType *FT =
|
|
FunctionType::get(Type::getInt32Ty(Context), /*not vararg*/false);
|
|
|
|
// By passing a module as the last parameter to the Function constructor,
|
|
// it automatically gets appended to the Module.
|
|
Function *F = Function::Create(FT, Function::ExternalLinkage, "main", M);
|
|
|
|
// Add a basic block to the function... again, it automatically inserts
|
|
// because of the last argument.
|
|
BasicBlock *BB = BasicBlock::Create(Context, "EntryBlock", F);
|
|
|
|
// Get pointers to the constant integers...
|
|
Value *Two = ConstantInt::get(Type::getInt32Ty(Context), 2);
|
|
Value *Three = ConstantInt::get(Type::getInt32Ty(Context), 3);
|
|
|
|
// Create the add instruction... does not insert...
|
|
Instruction *Add = BinaryOperator::Create(Instruction::Add, Two, Three,
|
|
"addresult");
|
|
|
|
// explicitly insert it into the basic block...
|
|
BB->getInstList().push_back(Add);
|
|
|
|
// Create the return instruction and add it to the basic block
|
|
BB->getInstList().push_back(ReturnInst::Create(Context, Add));
|
|
|
|
// Output the bitcode file to stdout
|
|
WriteBitcodeToFile(*M, outs());
|
|
|
|
// Delete the module and all of its contents.
|
|
delete M;
|
|
return 0;
|
|
}
|