forked from plf6vcqwa/nudt-compiler-cpp
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42 lines
1.0 KiB
42 lines
1.0 KiB
// 声明翻译模块：
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// - 处理全局变量与局部变量声明
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// - 处理数组初始化、空间分配与初值生成等
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#include "irgen/IRGen.h"
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#include <memory>
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#include <stdexcept>
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#include "ast/AstNodes.h"
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#include "ir/IR.h"
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void IRGenImpl::GenBlock(const ast::Block& block) {
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// 先为所有局部变量创建栈槽，使 alloca 聚集在入口块前部。
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for (const auto& decl : block.varDecls) {
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auto* slot = builder_.CreateAllocaI32(ir::DefaultContext().NextTemp());
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locals_[decl->name] = slot;
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}
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for (const auto& decl : block.varDecls) {
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GenVarDecl(*decl);
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}
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for (const auto& stmt : block.stmts) {
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GenStmt(*stmt);
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}
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}
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void IRGenImpl::GenVarDecl(const ast::VarDecl& decl) {
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auto it = locals_.find(decl.name);
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if (it == locals_.end()) {
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throw std::runtime_error("变量栈槽未创建: " + decl.name);
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}
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ir::Value* init = nullptr;
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if (decl.init) {
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init = GenExpr(*decl.init);
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} else {
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init = ir::DefaultContext().GetConstInt(0);
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}
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builder_.CreateStore(init, it->second);
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}
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