From 009b1c42aa6266385f2c37e227516b24077e6dd7 Mon Sep 17 00:00:00 2001
From: Ed Schouten <ed@FreeBSD.org>
Date: Tue, 2 Jun 2009 17:52:33 +0000
Subject: Import LLVM, at r72732.

---
 examples/ModuleMaker/ModuleMaker.cpp | 61 ++++++++++++++++++++++++++++++++++++
 1 file changed, 61 insertions(+)
 create mode 100644 examples/ModuleMaker/ModuleMaker.cpp

(limited to 'examples/ModuleMaker/ModuleMaker.cpp')

diff --git a/examples/ModuleMaker/ModuleMaker.cpp b/examples/ModuleMaker/ModuleMaker.cpp
new file mode 100644
index 000000000000..154e24065c0a
--- /dev/null
+++ b/examples/ModuleMaker/ModuleMaker.cpp
@@ -0,0 +1,61 @@
+//===- 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/Module.h"
+#include "llvm/DerivedTypes.h"
+#include "llvm/Constants.h"
+#include "llvm/Instructions.h"
+#include "llvm/Bitcode/ReaderWriter.h"
+#include <iostream>
+using namespace llvm;
+
+int main() {
+  // Create the "module" or "program" or "translation unit" to hold the
+  // function
+  Module *M = new Module("test");
+
+  // Create the main function: first create the type 'int ()'
+  FunctionType *FT = FunctionType::get(Type::Int32Ty, std::vector<const Type*>(),
+                                       /*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("EntryBlock", F);
+
+  // Get pointers to the constant integers...
+  Value *Two = ConstantInt::get(Type::Int32Ty, 2);
+  Value *Three = ConstantInt::get(Type::Int32Ty, 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(Add));
+
+  // Output the bitcode file to stdout
+  WriteBitcodeToFile(M, std::cout);
+
+  // Delete the module and all of its contents.
+  delete M;
+  return 0;
+}
-- 
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