问题
Some system libraries like malloc strlen want or return size_t as parameter.
- What is the right choice in LLVM IR to interact with these functions?
- Is the selection the task for the compiler?
- Does LLVM IR have a size_t type?
回答1:
At the LLVM level, size_t doesn't exist. It is a construct for the benefit of the developer that is typedef'd to a native type. The native types have a fixed size for the target architecture and that is how the compiler represents them in LLVM bit code. So on x86, size_t might by viewed by the front end as unsigned long, which it then writes to LLVM as i32 (since LLVM assembly doesn't have an unsigned type).
回答2:
You can use size_t in llvm, it is a valid type to be used as normal.
来源：https://stackoverflow.com/questions/10825186/it-there-an-equivalent-to-size-t-in-llvm