#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("assign_gen");
    auto builder = IRStmtBuilder::create(nullptr, module);
    SysYF::Ptr<Type> Int32Type = Type::get_int32_type(module);
    SysYF::Ptr<Type> FloatType = Type::get_float_type(module);
    auto mainFunctype=FunctionType::create(Int32Type,{});
    auto mainFunc=Function::create(mainFunctype,"main",module);
    auto bb=BasicBlock::create(module,"entry",mainFunc);
    builder->set_insert_point(bb);
    auto retAlloca=builder->create_alloca(Int32Type);
    auto bAlloca=builder->create_alloca(FloatType);
    builder->create_store(CONST_FP(1.8),bAlloca);//float b=1.8
    auto arrayType_a=ArrayType::get(Int32Type,2);
    auto aAlloca=builder->create_alloca(arrayType_a);
    auto a0gep=builder->create_gep(aAlloca,{CONST_INT(0),CONST_INT(0)});
    builder->create_store(CONST_INT(2),a0gep);//int a[2]={2}
    auto a0load=builder->create_load(a0gep);
    auto a0tofloat=builder->create_sitofp(a0load,FloatType);
    auto bload=builder->create_load(bAlloca);
    auto fmul=builder->create_fmul(a0tofloat,bload);
    auto fmultoint=builder->create_fptosi(fmul,Int32Type);
    auto a1gep=builder->create_gep(aAlloca,{CONST_INT(0),CONST_INT(1)});
    builder->create_store(fmultoint,a1gep);//a[1]=a[0]*b
    auto a1load=builder->create_load(a1gep);
    builder->create_store(a1load,retAlloca);
    auto retLoad=builder->create_load(retAlloca);
    builder->create_ret(retLoad);
    std::cout<<module->print();
    return 0;
}