#include "BasicBlock.h"
#include "Constant.h"
#include "Function.h"
#include "IRStmtBuilder.h"
#include "Module.h"
#include "Type.h"

#include <iostream>
#include <memory>

#ifdef DEBUG  // 用于调试信息,大家可以在编译过程中通过" -DDEBUG"来开启这一选项
#define DEBUG_OUTPUT std::cout << __LINE__ << std::endl;  // 输出行号的简单示例
#else
#define DEBUG_OUTPUT
#endif

#define CONST_INT(num) \
    ConstantInt::create(num, module)

#define CONST_FP(num) \
    ConstantFloat::create(num, module) // 得到常数值的表示,方便后面多次用到

using namespace SysYF::IR;

int main(){
    auto module=Module::create("if_gen");
    auto builder = IRStmtBuilder::create(nullptr, module);
    SysYF::Ptr<Type> Int32Type = Type::get_int32_type(module);
    auto zero_initializer=ConstantZero::create(Int32Type,module);
    auto a=GlobalVariable::create("a",module,Int32Type,false,zero_initializer);
    auto mainFunc=Function::create(FunctionType::create(Int32Type,{}),"main",module);
    auto bb=BasicBlock::create(module,"entry",mainFunc);
    builder->set_insert_point(bb);
    auto retAlloca=builder->create_alloca(Int32Type);
    builder->create_store(CONST_INT(10),a);//a=10
    auto aload=builder->create_load(a);
    auto cmp=builder->create_icmp_gt(aload,CONST_INT(0));
    auto truebb=BasicBlock::create(module,"if_true",mainFunc);
    auto falsebb=BasicBlock::create(module,"if_false",mainFunc);
    builder->create_cond_br(cmp,truebb,falsebb);
    builder->set_insert_point(truebb);//true
    aload=builder->create_load(a);
    builder->create_store(aload,retAlloca);
    auto retLoad=builder->create_load(retAlloca);
    builder->create_ret(retLoad);
    builder->set_insert_point(falsebb);
    builder->create_store(CONST_INT(0),retAlloca);
    retLoad=builder->create_load(retAlloca);
    builder->create_ret(retLoad);
    std::cout<<module->print();
    return 0;
}