mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-17 18:31:04 +00:00
53 lines
1.9 KiB
C++
53 lines
1.9 KiB
C++
|
//===- ModuleMaker.cpp - Example project which creates modules --*- C++ -*-===//
|
||
|
//
|
||
|
// This programs is a simple example that creates an LLVM module "from scratch",
|
||
|
// emitting it as a bytecode 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/Bytecode/Writer.h"
|
||
|
|
||
|
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::IntTy, 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 = new Function(FT, Function::ExternalLinkage, "main", M);
|
||
|
|
||
|
// Add a basic block to the function... again, it automatically inserts
|
||
|
// because of the last argument.
|
||
|
BasicBlock *BB = new BasicBlock("EntryBlock", F);
|
||
|
|
||
|
// Get pointers to the constant integers...
|
||
|
Value *Two = ConstantSInt::get(Type::IntTy, 2);
|
||
|
Value *Three = ConstantSInt::get(Type::IntTy, 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(new ReturnInst(Add));
|
||
|
|
||
|
// Output the bytecode file to stdout
|
||
|
WriteBytecodeToFile(M, std::cout);
|
||
|
|
||
|
// Delete the module and all of its contents.
|
||
|
delete M;
|
||
|
return 0;
|
||
|
}
|