Check in LLVM r95781.

4 files changed, 91 insertions, 0 deletions

diff --git a/examples/ModuleMaker/CMakeLists.txt b/examples/ModuleMaker/CMakeLists.txt
new file mode 100644
index 0000000..81e9115
--- /dev/null
+++ b/examples/ModuleMaker/CMakeLists.txt
@@ -0,0 +1,5 @@
+set(LLVM_LINK_COMPONENTS bitwriter)
+
+add_llvm_example(ModuleMaker
+  ModuleMaker.cpp
+  )
diff --git a/examples/ModuleMaker/Makefile b/examples/ModuleMaker/Makefile
new file mode 100644
index 0000000..9454cf5
--- /dev/null
+++ b/examples/ModuleMaker/Makefile
@@ -0,0 +1,14 @@
+##===- examples/ModuleMaker/Makefile -----------------------*- Makefile -*-===##
+# 
+#                     The LLVM Compiler Infrastructure
+#
+# This file is distributed under the University of Illinois Open Source
+# License. See LICENSE.TXT for details.
+# 
+##===----------------------------------------------------------------------===##
+LEVEL=../..
+TOOLNAME=ModuleMaker
+EXAMPLE_TOOL = 1
+LINK_COMPONENTS := bitwriter
+
+include $(LEVEL)/Makefile.common
diff --git a/examples/ModuleMaker/ModuleMaker.cpp b/examples/ModuleMaker/ModuleMaker.cpp
new file mode 100644
index 0000000..6bc52c1
--- /dev/null
+++ b/examples/ModuleMaker/ModuleMaker.cpp
@@ -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/LLVMContext.h"
+#include "llvm/Module.h"
+#include "llvm/DerivedTypes.h"
+#include "llvm/Constants.h"
+#include "llvm/Instructions.h"
+#include "llvm/Bitcode/ReaderWriter.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;
+}
diff --git a/examples/ModuleMaker/README.txt b/examples/ModuleMaker/README.txt
new file mode 100644
index 0000000..ecbe30e
--- /dev/null
+++ b/examples/ModuleMaker/README.txt
@@ -0,0 +1,8 @@
+//===----------------------------------------------------------------------===//
+//                         ModuleMaker Sample project
+//===----------------------------------------------------------------------===//
+
+This project is an extremely simple example of using some simple pieces of the 
+LLVM API.  The actual executable generated by this project simply emits an 
+LLVM bytecode file to standard output.  It is designed to show some basic 
+usage of LLVM APIs, and how to link to LLVM libraries.