[llvm-dev] clang/llvm support for %= in inline assembly

[Reid Kleckner via llvm-dev]

I documented this in r294204.

On Sun, Feb 5, 2017 at 8:19 AM, Andrew Kelley via llvm-dev <
llvm-dev at lists.llvm.org> wrote:

> On Sun, Feb 5, 2017 at 8:05 AM, Dimitry Andric <dimitry at andric.com> wrote:
>
>> Appending %= to the label name only works if you append at least one ':'
>> to the asm statement, otherwise it isn't seen as a so-called "assembler
>> template", apparently:
>
>
> Aha, ok, perfect, this results in LLVM IR:
>
>   tail call void asm sideeffect "named_label_${:uid}:\0Ajnz
> named_label_${:uid}\0A", "~{dirflag},~{fpsr},~{flags}"() #2, !dbg !20,
> !srcloc !25
>
> So LLVM IR does in fact already support it, and my use case is solved.
> However, it is undocumented in http://llvm.org/docs/LangRef.html. Might
> be night to add there for future developers.
>
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