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55 lines
2.1 KiB
55 lines
2.1 KiB
#include "BasicBlock.h"
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#include "Constant.h"
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#include "Function.h"
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#include "IRStmtBuilder.h"
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#include "Module.h"
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#include "Type.h"
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#include <iostream>
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#include <memory>
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#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
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#define DEBUG_OUTPUT std::cout << __LINE__ << std::endl; // 输出行号的简单示例
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#else
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#define DEBUG_OUTPUT
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#endif
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#define CONST_INT(num) \
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ConstantInt::create(num, module)
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#define CONST_FP(num) \
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ConstantFloat::create(num, module) // 得到常数值的表示,方便后面多次用到
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using namespace SysYF::IR;
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int main(){
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auto module=Module::create("assign_gen");
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auto builder = IRStmtBuilder::create(nullptr, module);
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SysYF::Ptr<Type> Int32Type = Type::get_int32_type(module);
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SysYF::Ptr<Type> FloatType = Type::get_float_type(module);
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auto mainFunctype=FunctionType::create(Int32Type,{});
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auto mainFunc=Function::create(mainFunctype,"main",module);
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auto bb=BasicBlock::create(module,"entry",mainFunc);
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builder->set_insert_point(bb);
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auto retAlloca=builder->create_alloca(Int32Type);
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auto bAlloca=builder->create_alloca(FloatType);
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builder->create_store(CONST_FP(1.8),bAlloca);//float b=1.8
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auto arrayType_a=ArrayType::get(Int32Type,2);
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auto aAlloca=builder->create_alloca(arrayType_a);
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auto a0gep=builder->create_gep(aAlloca,{CONST_INT(0),CONST_INT(0)});
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builder->create_store(CONST_INT(2),a0gep);//int a[2]={2}
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auto a0load=builder->create_load(a0gep);
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auto a0tofloat=builder->create_sitofp(a0load,FloatType);
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auto bload=builder->create_load(bAlloca);
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auto fmul=builder->create_fmul(a0tofloat,bload);
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auto fmultoint=builder->create_fptosi(fmul,Int32Type);
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auto a1gep=builder->create_gep(aAlloca,{CONST_INT(0),CONST_INT(1)});
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builder->create_store(fmultoint,a1gep);//a[1]=a[0]*b
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auto a1load=builder->create_load(a1gep);
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builder->create_store(a1load,retAlloca);
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auto retLoad=builder->create_load(retAlloca);
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builder->create_ret(retLoad);
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std::cout<<module->print();
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return 0;
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}
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