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

[Patrick Simmons via llvm-commits]

linuxrocks123 wrote:

@RalfJung @gonzalobg to be clear I meant "solve the issue fixed by #155491", not solve the language in this documentation.

Re _this_ PR, @RalfJung, what do you think of this proposed language:

> No optimizations may be performed which would be incorrect if the inline assembly string were changed to any other instruction or sequence of instructions that also respects all of the operand constraints and attributes placed on the inline assembly.

Do you like it?

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