Mercurial > hg > CbC > CbC_llvm
diff examples/ModuleMaker/ModuleMaker.cpp @ 3:9ad51c7bc036
1st commit. remove git dir and add all files.
author | Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> |
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date | Wed, 15 May 2013 06:43:32 +0900 |
parents | |
children | 1172e4bd9c6f |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/examples/ModuleMaker/ModuleMaker.cpp Wed May 15 06:43:32 2013 +0900 @@ -0,0 +1,64 @@ +//===- examples/ModuleMaker/ModuleMaker.cpp - Example project ---*- C++ -*-===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// 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/ReaderWriter.h" +#include "llvm/IR/Constants.h" +#include "llvm/IR/DerivedTypes.h" +#include "llvm/IR/Instructions.h" +#include "llvm/IR/LLVMContext.h" +#include "llvm/IR/Module.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; +}