using namespace llvm;
static Function* createAdd1(Module *M) {
+ LLVMContext &Context = M->getContext();
// Create the add1 function entry and insert this entry into module M. The
// function will have a return type of "int" and take an argument of "int".
Function *Add1F =
// Add a basic block to the function. As before, it automatically inserts
// because of the last argument.
- BasicBlock *BB = BasicBlock::Create(M->getContext(), "EntryBlock", Add1F);
+ BasicBlock *BB = BasicBlock::Create(Context, "EntryBlock", Add1F);
// Get pointers to the constant `1'.
- Value *One = ConstantInt::get(Type::getInt32Ty(M->getContext()), 1);
+ Value *One = ConstantInt::get(Type::getInt32Ty(Context), 1);
// Get pointers to the integer argument of the add1 function...
assert(Add1F->arg_begin() != Add1F->arg_end()); // Make sure there's an arg
Instruction *Add = BinaryOperator::CreateAdd(One, ArgX, "addresult", BB);
// Create the return instruction and add it to the basic block
- ReturnInst::Create(M->getContext(), Add, BB);
+ ReturnInst::Create(Context, Add, BB);
// Now, function add1 is ready.
return Add1F;
}
static Function *CreateFibFunction(Module *M) {
+ LLVMContext &Context = M->getContext();
// Create the fib function and insert it into module M. This function is said
// to return an int and take an int parameter.
FunctionType *FibFTy = FunctionType::get(Type::getInt32Ty(Context),
Function::Create(FibFTy, Function::ExternalLinkage, "fib", M);
// Add a basic block to the function.
- BasicBlock *BB = BasicBlock::Create(M->getContext(), "EntryBlock", FibF);
+ BasicBlock *BB = BasicBlock::Create(Context, "EntryBlock", FibF);
// Get pointers to the constants.
- Value *One = ConstantInt::get(Type::getInt32Ty(M->getContext()), 1);
- Value *Two = ConstantInt::get(Type::getInt32Ty(M->getContext()), 2);
+ Value *One = ConstantInt::get(Type::getInt32Ty(Context), 1);
+ Value *Two = ConstantInt::get(Type::getInt32Ty(Context), 2);
// Get pointer to the integer argument of the add1 function...
Argument *ArgX = &*FibF->arg_begin(); // Get the arg.
ArgX->setName("AnArg"); // Give it a nice symbolic name for fun.
// Create the true_block.
- BasicBlock *RetBB = BasicBlock::Create(M->getContext(), "return", FibF);
+ BasicBlock *RetBB = BasicBlock::Create(Context, "return", FibF);
// Create an exit block.
- BasicBlock* RecurseBB = BasicBlock::Create(M->getContext(), "recurse", FibF);
+ BasicBlock *RecurseBB = BasicBlock::Create(Context, "recurse", FibF);
// Create the "if (arg < 2) goto exitbb"
Value *CondInst = new ICmpInst(*BB, ICmpInst::ICMP_SLE, ArgX, Two, "cond");
BranchInst::Create(RetBB, RecurseBB, CondInst, BB);
// Create: ret int 1
- ReturnInst::Create(M->getContext(), One, RetBB);
+ ReturnInst::Create(Context, One, RetBB);
// create fib(x-1)
Value *Sub = BinaryOperator::CreateSub(ArgX, One, "arg", RecurseBB);
BinaryOperator::CreateAdd(CallFibX1, CallFibX2, "addresult", RecurseBB);
// Create the return instruction and add it to the basic block
- ReturnInst::Create(M->getContext(), Sum, RecurseBB);
+ ReturnInst::Create(Context, Sum, RecurseBB);
return FibF;
}