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Complete Lab2 IR generation and document process

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This commit is contained in:
CGH0S7
2026-04-16 00:21:35 +08:00
parent 6fc0c89072
commit 979d271ebe
23 changed files with 2583 additions and 471 deletions
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68
include/irgen/IRGen.h
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@@ -5,8 +5,10 @@
#include <any>
#include <memory>
#include <stack>
#include <string>
#include <unordered_map>
#include <vector>
#include "SysYBaseVisitor.h"
#include "SysYParser.h"
@@ -18,24 +20,56 @@ class Module;
class Function;
class IRBuilder;
class Value;
class BasicBlock;
}
class IRGenImpl final : public SysYBaseVisitor {
public:
IRGenImpl(ir::Module& module, const SemanticContext& sema);
// Top-level rules
std::any visitCompUnit(SysYParser::CompUnitContext* ctx) override;
std::any visitDecl(SysYParser::DeclContext* ctx) override;
std::any visitConstDecl(SysYParser::ConstDeclContext* ctx) override;
std::any visitVarDecl(SysYParser::VarDeclContext* ctx) override;
std::any visitConstDef(SysYParser::ConstDefContext* ctx) override;
std::any visitVarDef(SysYParser::VarDefContext* ctx) override;
std::any visitFuncDef(SysYParser::FuncDefContext* ctx) override;
std::any visitFuncFParam(SysYParser::FuncFParamContext* ctx) override;
// Statement rules
std::any visitBlockStmt(SysYParser::BlockStmtContext* ctx) override;
std::any visitBlockItem(SysYParser::BlockItemContext* ctx) override;
std::any visitDecl(SysYParser::DeclContext* ctx) override;
std::any visitStmt(SysYParser::StmtContext* ctx) override;
std::any visitVarDef(SysYParser::VarDefContext* ctx) override;
std::any visitAssignStmt(SysYParser::AssignStmtContext* ctx) override;
std::any visitReturnStmt(SysYParser::ReturnStmtContext* ctx) override;
std::any visitIfStmt(SysYParser::IfStmtContext* ctx) override;
std::any visitWhileStmt(SysYParser::WhileStmtContext* ctx) override;
std::any visitBreakStmt(SysYParser::BreakStmtContext* ctx) override;
std::any visitContinueStmt(SysYParser::ContinueStmtContext* ctx) override;
std::any visitExpStmt(SysYParser::ExpStmtContext* ctx) override;
// Expression rules
std::any visitParenExp(SysYParser::ParenExpContext* ctx) override;
std::any visitLValueExp(SysYParser::LValueExpContext* ctx) override;
std::any visitNumberExp(SysYParser::NumberExpContext* ctx) override;
std::any visitVarExp(SysYParser::VarExpContext* ctx) override;
std::any visitAdditiveExp(SysYParser::AdditiveExpContext* ctx) override;
std::any visitFuncCallExp(SysYParser::FuncCallExpContext* ctx) override;
std::any visitNotExp(SysYParser::NotExpContext* ctx) override;
std::any visitUnaryAddExp(SysYParser::UnaryAddExpContext* ctx) override;
std::any visitUnarySubExp(SysYParser::UnarySubExpContext* ctx) override;
std::any visitMulExp(SysYParser::MulExpContext* ctx) override;
std::any visitDivExp(SysYParser::DivExpContext* ctx) override;
std::any visitModExp(SysYParser::ModExpContext* ctx) override;
std::any visitAddExp(SysYParser::AddExpContext* ctx) override;
std::any visitSubExp(SysYParser::SubExpContext* ctx) override;
std::any visitLtExp(SysYParser::LtExpContext* ctx) override;
std::any visitLeExp(SysYParser::LeExpContext* ctx) override;
std::any visitGtExp(SysYParser::GtExpContext* ctx) override;
std::any visitGeExp(SysYParser::GeExpContext* ctx) override;
std::any visitEqExp(SysYParser::EqExpContext* ctx) override;
std::any visitNeExp(SysYParser::NeExpContext* ctx) override;
std::any visitAndExp(SysYParser::AndExpContext* ctx) override;
std::any visitOrExp(SysYParser::OrExpContext* ctx) override;
private:
enum class BlockFlow {
@@ -43,15 +77,35 @@ class IRGenImpl final : public SysYBaseVisitor {
Terminated,
};
BlockFlow VisitBlockItemResult(SysYParser::BlockItemContext& item);
ir::Value* EvalExpr(SysYParser::ExpContext& expr);
ir::ConstantValue* EvalConstExpr(SysYParser::ExpContext& expr);
ir::Value* GetLValuePtr(SysYParser::LValueContext* ctx);
ir::Value* DecayArrayPtr(SysYParser::LValueContext* ctx);
bool IsArrayLikeDef(antlr4::ParserRuleContext* def) const;
size_t GetArrayRank(antlr4::ParserRuleContext* def) const;
std::shared_ptr<ir::Type> GetDefType(antlr4::ParserRuleContext* def) const;
void ZeroInitializeLocal(ir::Value* ptr, std::shared_ptr<ir::Type> ty);
void EmitLocalInitValue(ir::Value* ptr, std::shared_ptr<ir::Type> ty,
SysYParser::InitValueContext* init);
ir::Module& module_;
const SemanticContext& sema_;
ir::Function* func_;
ir::IRBuilder builder_;
// 名称绑定由 Sema 负责；IRGen 只维护“声明 -> 存储槽位”的代码生成状态。
std::unordered_map<SysYParser::VarDefContext*, ir::Value*> storage_map_;
// Maps a definition (VarDef, ConstDef, FuncFParam) to its IR value (Alloca or GlobalValue)
std::unordered_map<antlr4::ParserRuleContext*, ir::Value*> storage_map_;
// For global scope tracking
bool is_global_scope_ = true;
// For loop control
std::stack<ir::BasicBlock*> break_stack_;
std::stack<ir::BasicBlock*> continue_stack_;
// Helper to handle short-circuiting and comparison results
ir::Value* ToI1(ir::Value* v);
ir::Value* ToI32(ir::Value* v);
};
std::unique_ptr<ir::Module> GenerateIR(SysYParser::CompUnitContext& tree,