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65 lines
1.9 KiB
65 lines
1.9 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
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#define DEBUG_OUTPUT std::cout << __LINE__ << std::endl;
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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)
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using namespace SysYF::IR;
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int main(){
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auto module = Module::create("if");
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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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auto zero_initializer = ConstantZero::create(Int32Type, module);
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auto a = GlobalVariable::create("a", module, Int32Type, false, zero_initializer);
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//main 函数
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auto mainFun = Function::create(FunctionType::create(Int32Type, {}),
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"main", module);
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auto bb = BasicBlock::create(module, "entry", mainFun);
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builder->set_insert_point(bb);
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auto retAlloca = builder->create_alloca(Int32Type);
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builder->create_store(CONST_INT(10), a);
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auto aLoad = builder->create_load(a);
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auto icmp = builder->create_icmp_gt(aLoad, CONST_INT(0));
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auto trueBB = BasicBlock::create(module, "trueBB_if", mainFun); // true分支
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auto falseBB = BasicBlock::create(module, "falseBB_if", mainFun); // false分支
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builder->create_cond_br(icmp, trueBB, falseBB);
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DEBUG_OUTPUT
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builder->set_insert_point(trueBB);
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aLoad = builder->create_load(a);
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builder->create_store(aLoad,retAlloca);
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auto retLoad = builder->create_load(retAlloca);
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builder->create_ret(retLoad);
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builder->set_insert_point(falseBB);
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builder->create_store(CONST_INT(0),retAlloca);
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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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