feat: if let 语句 — if let Option::Some = expr { ... }

2026-06-06 15:20:34 +08:00
parent 0e1f8c5795
commit e02cc7b1d6
4 changed files with 98 additions and 39 deletions
@@ -813,6 +813,15 @@ LLVMModuleRef codegen_module(AstNode* ast, Arena* codegen_arena,
        memcpy_args, 3, false);
    ctx.memcpy_fn = LLVMAddFunction(ctx.module, "memcpy", memcpy_ty);

+    // __chkstk 桩：LLVM 在生成大栈帧代码时会引用此符号（MinGW x64: __chkstk）
+    {
+        LLVMTypeRef chkstk_ty = LLVMFunctionType(LLVMVoidTypeInContext(ctx.context), NULL, 0, false);
+        LLVMValueRef chkstk_fn = LLVMAddFunction(ctx.module, "__chkstk", chkstk_ty);
+        LLVMBasicBlockRef chk_bb = LLVMAppendBasicBlockInContext(ctx.context, chkstk_fn, "entry");
+        LLVMPositionBuilderAtEnd(ctx.builder, chk_bb);
+        LLVMBuildRetVoid(ctx.builder);
+    }
+
    // 第零遍：先创建所有命名结构体（占位符，未设置 body）
    for (size_t i = 0; i < ast->as.program.struct_count; i++) {
        AstNode* sd = ast->as.program.structs[i];