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merging branch lab2-IRGen into master

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This commit is contained in:
lixuanwang
2025-05-29 17:14:42 +08:00
parent 1e47af2771
commit 09d67fdaf1
2 changed files with 167 additions and 77 deletions
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238
src/LLVMIRGenerator.cpp
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@ -217,88 +217,172 @@ std::any LLVMIRGenerator::visitBlockStmt(SysYParser::BlockStmtContext* ctx) {
}
return nullptr;
}
std::any LLVMIRGenerator::visitStmt(SysYParser::StmtContext* ctx) {
if (ctx->lValue() && ctx->ASSIGN()) {
std::string lhsAlloca = std::any_cast<std::string>(ctx->lValue()->accept(this));
std::string lhsType = symbolTable[ctx->lValue()->Ident()->getText()].second;
std::string rhs = std::any_cast<std::string>(ctx->exp()->accept(this));
if (lhsType == "float") {
try {
double floatValue = std::stod(rhs);
uint64_t hexValue = reinterpret_cast<uint64_t&>(floatValue);
std::stringstream ss;
ss << "0x" << std::hex << std::uppercase << (hexValue & (0xffffffffUL << 32));
rhs = ss.str();
} catch (...) {
throw std::runtime_error("Invalid float literal: " + rhs);
}
std::any visitAssignStmt(SysYParser::AssignStmtContext *ctx)
{
std::string lhsAlloca = std::any_cast<std::string>(ctx->lValue()->accept(this));
std::string lhsType = symbolTable[ctx->lValue()->Ident()->getText()].second;
std::string rhs = std::any_cast<std::string>(ctx->exp()->accept(this));
if (lhsType == "float") {
try {
double floatValue = std::stod(rhs);
uint64_t hexValue = reinterpret_cast<uint64_t&>(floatValue);
std::stringstream ss;
ss << "0x" << std::hex << std::uppercase << (hexValue & (0xffffffffUL << 32));
rhs = ss.str();
} catch (...) {
throw std::runtime_error("Invalid float literal: " + rhs);
}
irStream << " store " << lhsType << " " << rhs << ", " << lhsType
<< "* " << lhsAlloca << ", align 4\n";
} else if (ctx->RETURN()) {
hasReturn = true;
if (ctx->exp()) {
std::string value = std::any_cast<std::string>(ctx->exp()->accept(this));
irStream << " ret " << currentReturnType << " " << value << "\n";
} else {
irStream << " ret void\n";
}
} else if (ctx->IF()) {
std::string cond = std::any_cast<std::string>(ctx->cond()->accept(this));
std::string trueLabel = "if.then." + std::to_string(tempCounter);
std::string falseLabel = "if.else." + std::to_string(tempCounter);
std::string mergeLabel = "if.end." + std::to_string(tempCounter++);
irStream << " br i1 " << cond << ", label %" << trueLabel << ", label %" << falseLabel << "\n";
irStream << trueLabel << ":\n";
ctx->stmt(0)->accept(this);
irStream << " br label %" << mergeLabel << "\n";
irStream << falseLabel << ":\n";
if (ctx->ELSE()) {
ctx->stmt(1)->accept(this);
}
irStream << " br label %" << mergeLabel << "\n";
irStream << mergeLabel << ":\n";
} else if (ctx->WHILE()) {
std::string loop_cond = "while.cond." + std::to_string(tempCounter);
std::string loop_body = "while.body." + std::to_string(tempCounter);
std::string loop_end = "while.end." + std::to_string(tempCounter++);
loopStack.push({loop_end, loop_cond});
irStream << " br label %" << loop_cond << "\n";
irStream << loop_cond << ":\n";
std::string cond = std::any_cast<std::string>(ctx->cond()->accept(this));
irStream << " br i1 " << cond << ", label %" << loop_body << ", label %" << loop_end << "\n";
irStream << loop_body << ":\n";
ctx->stmt(0)->accept(this);
irStream << " br label %" << loop_cond << "\n";
irStream << loop_end << ":\n";
loopStack.pop();
} else if (ctx->BREAK()) {
if (loopStack.empty()) {
throw std::runtime_error("Break statement outside of a loop.");
}
irStream << " br label %" << loopStack.top().breakLabel << "\n";
} else if (ctx->CONTINUE()) {
if (loopStack.empty()) {
throw std::runtime_error("Continue statement outside of a loop.");
}
irStream << " br label %" << loopStack.top().continueLabel << "\n";
} else if (ctx->blockStmt()) {
ctx->blockStmt()->accept(this);
} else if (ctx->exp()) {
ctx->exp()->accept(this);
}
irStream << " store " << lhsType << " " << rhs << ", " << lhsType
<< "* " << lhsAlloca << ", align 4\n";
return nullptr;
}
std::any visitIfStmt(SysYParser::IfStmtContext *ctx)
{
std::string cond = std::any_cast<std::string>(ctx->cond()->accept(this));
std::string trueLabel = "if.then." + std::to_string(tempCounter);
std::string falseLabel = "if.else." + std::to_string(tempCounter);
std::string mergeLabel = "if.end." + std::to_string(tempCounter++);
irStream << " br i1 " << cond << ", label %" << trueLabel << ", label %" << falseLabel << "\n";
irStream << trueLabel << ":\n";
ctx->stmt(0)->accept(this);
irStream << " br label %" << mergeLabel << "\n";
irStream << falseLabel << ":\n";
if (ctx->ELSE()) {
ctx->stmt(1)->accept(this);
}
irStream << " br label %" << mergeLabel << "\n";
irStream << mergeLabel << ":\n";
return nullptr;
}
std::any visitWhileStmt(SysYParser::WhileStmtContext *ctx)
{
std::string loop_cond = "while.cond." + std::to_string(tempCounter);
std::string loop_body = "while.body." + std::to_string(tempCounter);
std::string loop_end = "while.end." + std::to_string(tempCounter++);
loopStack.push({loop_end, loop_cond});
irStream << " br label %" << loop_cond << "\n";
irStream << loop_cond << ":\n";
std::string cond = std::any_cast<std::string>(ctx->cond()->accept(this));
irStream << " br i1 " << cond << ", label %" << loop_body << ", label %" << loop_end << "\n";
irStream << loop_body << ":\n";
ctx->stmt(0)->accept(this);
irStream << " br label %" << loop_cond << "\n";
irStream << loop_end << ":\n";
loopStack.pop();
return nullptr;
}
std::any visitBreakStmt(SysYParser::BreakStmtContext *ctx)
{
if (loopStack.empty()) {
throw std::runtime_error("Break statement outside of a loop.");
}
irStream << " br label %" << loopStack.top().breakLabel << "\n";
return nullptr;
}
std::any visitContinueStmt(SysYParser::ContinueStmtContext *ctx)
{
if (loopStack.empty()) {
throw std::runtime_error("Continue statement outside of a loop.");
}
irStream << " br label %" << loopStack.top().continueLabel << "\n";
return nullptr;
}
// std::any LLVMIRGenerator::visitStmt(SysYParser::StmtContext* ctx) {
// if (ctx->lValue() && ctx->ASSIGN()) {
// std::string lhsAlloca = std::any_cast<std::string>(ctx->lValue()->accept(this));
// std::string lhsType = symbolTable[ctx->lValue()->Ident()->getText()].second;
// std::string rhs = std::any_cast<std::string>(ctx->exp()->accept(this));
// if (lhsType == "float") {
// try {
// double floatValue = std::stod(rhs);
// uint64_t hexValue = reinterpret_cast<uint64_t&>(floatValue);
// std::stringstream ss;
// ss << "0x" << std::hex << std::uppercase << (hexValue & (0xffffffffUL << 32));
// rhs = ss.str();
// } catch (...) {
// throw std::runtime_error("Invalid float literal: " + rhs);
// }
// }
// irStream << " store " << lhsType << " " << rhs << ", " << lhsType
// << "* " << lhsAlloca << ", align 4\n";
// } else if (ctx->RETURN()) {
// hasReturn = true;
// if (ctx->exp()) {
// std::string value = std::any_cast<std::string>(ctx->exp()->accept(this));
// irStream << " ret " << currentReturnType << " " << value << "\n";
// } else {
// irStream << " ret void\n";
// }
// } else if (ctx->IF()) {
// std::string cond = std::any_cast<std::string>(ctx->cond()->accept(this));
// std::string trueLabel = "if.then." + std::to_string(tempCounter);
// std::string falseLabel = "if.else." + std::to_string(tempCounter);
// std::string mergeLabel = "if.end." + std::to_string(tempCounter++);
// irStream << " br i1 " << cond << ", label %" << trueLabel << ", label %" << falseLabel << "\n";
// irStream << trueLabel << ":\n";
// ctx->stmt(0)->accept(this);
// irStream << " br label %" << mergeLabel << "\n";
// irStream << falseLabel << ":\n";
// if (ctx->ELSE()) {
// ctx->stmt(1)->accept(this);
// }
// irStream << " br label %" << mergeLabel << "\n";
// irStream << mergeLabel << ":\n";
// } else if (ctx->WHILE()) {
// std::string loop_cond = "while.cond." + std::to_string(tempCounter);
// std::string loop_body = "while.body." + std::to_string(tempCounter);
// std::string loop_end = "while.end." + std::to_string(tempCounter++);
// loopStack.push({loop_end, loop_cond});
// irStream << " br label %" << loop_cond << "\n";
// irStream << loop_cond << ":\n";
// std::string cond = std::any_cast<std::string>(ctx->cond()->accept(this));
// irStream << " br i1 " << cond << ", label %" << loop_body << ", label %" << loop_end << "\n";
// irStream << loop_body << ":\n";
// ctx->stmt(0)->accept(this);
// irStream << " br label %" << loop_cond << "\n";
// irStream << loop_end << ":\n";
// loopStack.pop();
// } else if (ctx->BREAK()) {
// if (loopStack.empty()) {
// throw std::runtime_error("Break statement outside of a loop.");
// }
// irStream << " br label %" << loopStack.top().breakLabel << "\n";
// } else if (ctx->CONTINUE()) {
// if (loopStack.empty()) {
// throw std::runtime_error("Continue statement outside of a loop.");
// }
// irStream << " br label %" << loopStack.top().continueLabel << "\n";
// } else if (ctx->blockStmt()) {
// ctx->blockStmt()->accept(this);
// } else if (ctx->exp()) {
// ctx->exp()->accept(this);
// }
// return nullptr;
// }
std::any LLVMIRGenerator::visitLValue(SysYParser::LValueContext* ctx) {
std::string varName = ctx->Ident()->getText();
return symbolTable[varName].first;