Exemplo n.º 1
0
void CVariableDeclaration::CreateWriteAccessor(CodeGenContext& context, BitVariable& var, const std::string& moduleName, const std::string& name, bool impedance)
{
	std::vector<llvm::Type*> argTypes;
	argTypes.push_back(context.getIntType(var.size));
	llvm::FunctionType *ftype = llvm::FunctionType::get(context.getVoidType(), argTypes, false);
	llvm::Function* function;
	if (context.isRoot)
	{
		function = context.makeFunction(ftype, llvm::GlobalValue::ExternalLinkage, context.moduleName + context.getSymbolPrefix() + "PinSet" + id.name);
	}
	else
	{
		function = context.makeFunction(ftype, llvm::GlobalValue::PrivateLinkage, context.moduleName + context.getSymbolPrefix() + "PinSet" + id.name);
	}
	function->onlyReadsMemory();	// Mark input read only

	context.StartFunctionDebugInfo(function, declarationLoc);

	llvm::BasicBlock *bblock = context.makeBasicBlock("entry", function);

	context.pushBlock(bblock, declarationLoc);

	llvm::Function::arg_iterator args = function->arg_begin();
	llvm::Value* setVal = &*args;
	setVal->setName("InputVal");

	llvm::LoadInst* load = new llvm::LoadInst(var.value, "", false, bblock);

	if (impedance)
	{
		llvm::LoadInst* loadImp = new llvm::LoadInst(var.impedance, "", false, bblock);
		llvm::CmpInst* check = llvm::CmpInst::Create(llvm::Instruction::ICmp, llvm::ICmpInst::ICMP_NE, loadImp, context.getConstantZero(var.size.getLimitedValue()), "impedance", bblock);

		setVal = llvm::SelectInst::Create(check, setVal, load, "impOrReal", bblock);
	}

	llvm::Value* stor = CAssignment::generateAssignmentActual(var, id/*moduleName, name*/, setVal, context, false);		// we shouldn't clear impedance on write via pin (instead should ignore write if impedance is set)

	var.priorValue = load;
	var.writeInput = setVal;
	var.writeAccessor = &writeAccessor;
	writeAccessor = context.makeReturn(bblock);

	context.popBlock(declarationLoc);

	context.EndFunctionDebugInfo();
}
Exemplo n.º 2
0
void createEchoFunction(CodeGenContext& context, llvm::Function* printfFn)
{
    std::vector<llvm::Type*> echo_arg_types;
    echo_arg_types.push_back(llvm::Type::getInt64Ty(getGlobalContext()));

    llvm::FunctionType* echo_type =
        llvm::FunctionType::get(
            llvm::Type::getVoidTy(getGlobalContext()), echo_arg_types, false);

    llvm::Function *func = llvm::Function::Create(
                echo_type, llvm::Function::InternalLinkage,
                llvm::Twine("echo"),
                context.module
           );
    llvm::BasicBlock *bblock = llvm::BasicBlock::Create(getGlobalContext(), "entry", func, 0);
	context.pushBlock(bblock);
    
    const char *constValue = "%d\n";
    llvm::Constant *format_const = llvm::ConstantDataArray::getString(getGlobalContext(), constValue);
    llvm::GlobalVariable *var =
        new llvm::GlobalVariable(
            *context.module, llvm::ArrayType::get(llvm::IntegerType::get(getGlobalContext(), 8), strlen(constValue)+1),
            true, llvm::GlobalValue::PrivateLinkage, format_const, ".str");
    llvm::Constant *zero =
        llvm::Constant::getNullValue(llvm::IntegerType::getInt32Ty(getGlobalContext()));

    std::vector<llvm::Constant*> indices;
    indices.push_back(zero);
    indices.push_back(zero);
    llvm::Constant *var_ref = llvm::ConstantExpr::getGetElementPtr(
	llvm::ArrayType::get(llvm::IntegerType::get(getGlobalContext(), 8), strlen(constValue+1)),
        var, indices);

    std::vector<Value*> args;
    args.push_back(var_ref);

    Function::arg_iterator argsValues = func->arg_begin();
    Value* toPrint = argsValues++;
    toPrint->setName("toPrint");
    args.push_back(toPrint);
    
	CallInst *call = CallInst::Create(printfFn, makeArrayRef(args), "", bblock);
	ReturnInst::Create(getGlobalContext(), bblock);
	context.popBlock();
}
Exemplo n.º 3
0
void CVariableDeclaration::CreateReadAccessor(CodeGenContext& context, BitVariable& var, bool impedance)
{
	std::vector<llvm::Type*> argTypes;
	llvm::FunctionType *ftype = llvm::FunctionType::get(context.getIntType(var.size), argTypes, false);
	llvm::Function* function;
	if (context.isRoot)
	{
		function = context.makeFunction(ftype, llvm::GlobalValue::ExternalLinkage, context.moduleName + context.getSymbolPrefix() + "PinGet" + id.name);
	}
	else
	{
		function = context.makeFunction(ftype, llvm::GlobalValue::PrivateLinkage, context.moduleName + context.getSymbolPrefix() + "PinGet" + id.name);
	}
	function->setOnlyReadsMemory();

	context.StartFunctionDebugInfo(function, declarationLoc);

	llvm::BasicBlock *bblock = context.makeBasicBlock("entry", function);

	context.pushBlock(bblock, declarationLoc);

	llvm::Value* load = new llvm::LoadInst(var.value, "", false, bblock);
	if (impedance)
	{
		llvm::LoadInst* loadImp = new llvm::LoadInst(var.impedance, "", false, bblock);
		llvm::CmpInst* check = llvm::CmpInst::Create(llvm::Instruction::ICmp, llvm::ICmpInst::ICMP_EQ, loadImp, context.getConstantZero(var.size.getLimitedValue()), "impedance", bblock);

		load = llvm::SelectInst::Create(check, load, loadImp, "impOrReal", bblock);
	}

	context.makeReturnValue(load, bblock);

	context.popBlock(declarationLoc);

	context.EndFunctionDebugInfo();
}