You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
116 lines
4.4 KiB
116 lines
4.4 KiB
// 将语法树翻译为 IR。
|
|
// 实现拆分在 IRGenFunc/IRGenStmt/IRGenExp/IRGenDecl。
|
|
|
|
#pragma once
|
|
|
|
#include <any>
|
|
#include <memory>
|
|
#include <string>
|
|
#include <unordered_map>
|
|
|
|
#include "SysYBaseVisitor.h"
|
|
#include "SysYParser.h"
|
|
#include "ir/IR.h"
|
|
#include "sem/Sema.h"
|
|
|
|
namespace ir {
|
|
class Module;
|
|
class Function;
|
|
class IRBuilder;
|
|
class Value;
|
|
}
|
|
|
|
class IRGenImpl final : public SysYBaseVisitor {
|
|
public:
|
|
IRGenImpl(ir::Module& module, const SemanticContext& sema);
|
|
|
|
std::any visitCompUnit(SysYParser::CompUnitContext* ctx) override;
|
|
std::any visitFuncDef(SysYParser::FuncDefContext* ctx) override;
|
|
std::any visitBlock(SysYParser::BlockContext* ctx) override;
|
|
std::any visitBlockItem(SysYParser::BlockItemContext* ctx) override;
|
|
std::any visitDecl(SysYParser::DeclContext* ctx) override;
|
|
std::any visitConstDecl(SysYParser::ConstDeclContext* ctx) override;
|
|
std::any visitConstDef(SysYParser::ConstDefContext* ctx) override;
|
|
std::any visitStmt(SysYParser::StmtContext* ctx) override;
|
|
std::any visitVarDef(SysYParser::VarDefContext* ctx) override;
|
|
std::any visitPrimaryExp(SysYParser::PrimaryExpContext* ctx) override;
|
|
std::any visitNumber(SysYParser::NumberContext* ctx) override;
|
|
std::any visitLVal(SysYParser::LValContext* ctx) override;
|
|
std::any visitAddExp(SysYParser::AddExpContext* ctx) override;
|
|
std::any visitMulExp(SysYParser::MulExpContext* ctx) override;
|
|
std::any visitUnaryExp(SysYParser::UnaryExpContext* ctx) override;
|
|
std::any visitRelExp(SysYParser::RelExpContext* ctx) override;
|
|
std::any visitEqExp(SysYParser::EqExpContext* ctx) override;
|
|
std::any visitLAndExp(SysYParser::LAndExpContext* ctx) override;
|
|
std::any visitLOrExp(SysYParser::LOrExpContext* ctx) override;
|
|
std::any visitCondUnaryExp(SysYParser::CondUnaryExpContext* ctx) override;
|
|
std::any visitCond(SysYParser::CondContext* ctx) override;
|
|
std::any visitFuncRParams(SysYParser::FuncRParamsContext* ctx) override;
|
|
|
|
private:
|
|
enum class BlockFlow {
|
|
Continue,
|
|
Terminated,
|
|
};
|
|
|
|
BlockFlow VisitBlockItemResult(SysYParser::BlockItemContext& item);
|
|
ir::Value* EvalExpr(SysYParser::ExpContext& expr);
|
|
ir::ConstantValue* EvaluateConst(antlr4::tree::ParseTree* tree);
|
|
int EvaluateConstInt(SysYParser::ConstExpContext* ctx);
|
|
int EvaluateConstInt(SysYParser::ExpContext* ctx);
|
|
|
|
std::shared_ptr<ir::Type> GetGEPResultType(ir::Value* ptr, const std::vector<ir::Value*>& indices);
|
|
|
|
// Flatten array initializers
|
|
void FlattenInitVal(SysYParser::InitValContext* ctx,
|
|
const std::vector<int>& dims,
|
|
const std::vector<int>& sub_sizes,
|
|
int dim_idx,
|
|
size_t& current_pos,
|
|
std::vector<ir::Value*>& results,
|
|
bool is_float);
|
|
|
|
void FlattenConstInitVal(SysYParser::ConstInitValContext* ctx,
|
|
const std::vector<int>& dims,
|
|
const std::vector<int>& sub_sizes,
|
|
int dim_idx,
|
|
size_t& current_pos,
|
|
std::vector<ir::ConstantValue*>& results,
|
|
bool is_float);
|
|
|
|
ir::Module& module_;
|
|
const SemanticContext& sema_;
|
|
ir::Function* func_;
|
|
ir::IRBuilder builder_;
|
|
// 考虑到嵌套作用域（全局、函数、语句块），使用 vector 模拟栈来管理 storage_map_ 和 const_values_
|
|
std::vector<std::unordered_map<std::string, ir::Value*>> storage_map_stack_;
|
|
std::vector<std::unordered_map<std::string, ir::ConstantValue*>> const_values_stack_;
|
|
|
|
// 用于在栈中查找变量
|
|
ir::Value* FindStorage(const std::string& name) const {
|
|
for (auto it = storage_map_stack_.rbegin(); it != storage_map_stack_.rend(); ++it) {
|
|
if (it->count(name)) return it->at(name);
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
ir::ConstantValue* FindConst(const std::string& name) const {
|
|
for (auto it = const_values_stack_.rbegin(); it != const_values_stack_.rend(); ++it) {
|
|
if (it->count(name)) return it->at(name);
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
// 用于 break 和 continue 跳转的目标位置
|
|
ir::BasicBlock* current_loop_cond_bb_ = nullptr;
|
|
ir::BasicBlock* current_loop_exit_bb_ = nullptr;
|
|
|
|
int bb_cnt_ = 0;
|
|
std::string NextBlockName(const std::string& prefix = "bb") {
|
|
return prefix + "_" + std::to_string(++bb_cnt_);
|
|
}
|
|
};
|
|
|
|
std::unique_ptr<ir::Module> GenerateIR(SysYParser::CompUnitContext& tree,
|
|
const SemanticContext& sema);
|