zhangxiongpang
2014-Jun-08 20:37 UTC
[LLVMdev] Does LLVM have some interface to determine whether a parameter type may be passed in registers?
Hi, all! I want to implement C language variable argument support with LLVM-3.3 on x86_64. But it seems LLVM does not support va_arg with long double type and aggregate type on x86_64. So I need to seek another way. I saw the "Coding Examples" in AMD64-ABI manual, in which the algorithm for the generic va_arg implementation needs to determine whether a parameter type may be passed in registers. I want to know whether LLVM has already implemented some interfaces to check it? Or I need to write one by myself? It's a pity that I'm not very familiar with it. Can anyone give me some suggestions? Thanks in advance! Zhang -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20140609/23849a6f/attachment.html>