[llvm] [LangRef] inline asm: the instructions are treated opaquely (PR #157080)

[Patrick Simmons via llvm-commits]

linuxrocks123 wrote:

@gonzalobg other than the approach taken by PR #155491, I don't think there's any way to give hints about inline asm that won't cause compilation errors on compilers that don't understand the hints, whether that compiler is GCC or a version of LLVM prior to the release that understands the hints.  That is motivation for giving the hints as part of the asm string.  Since neither Rust nor anyone else needs to break that, I hope @RalfJung will decide not to break it.

https://github.com/llvm/llvm-project/pull/157080