code += "}";
The SETBLOCK function is somewhat like realloc() in the Standard C library, but never moves the allocated block. Resizing a block to the same or smaller size will always succeed, and will free up the remaining memory. Resizing to a larger size may fail, and if it does, the maximum available size will be returned in the BX register (just like when allocating).
，更多细节参见搜狗输入法下载
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type-and-layout resolved IR, applying function-local