https://blog.nelhage.com/2010/10/amd64-and-va_arg/

A while back, I was poking around LLVM bugs, and discovered, to my surprise, that LLVM doesn’t support the va_arg intrinsic, used by functions to accept multiple arguments, at all on amd64. It turns out that clang and llvm-gcc, the compilers that backend to LLVM, have their own implementations in the frontend, so this isn’t as big a deal as it might sound, but it was still a surprise to me.

2010-10-04T00:14:28Zhttps://blog.nelhage.com/post/Nelson ElhageRecent content in Posts on Made of Bugs2026-09-27T05:07:07Zrss20false60Nelson Elhagenelson-elhage0"5b2ae9eec2e293572f6ae5a000bd0161-ssl-df"200utf-8