[LLVMdev] Preventing IR instruction duplication

[Reid Kleckner]

Is this volatile inline asm?  If so, I don't think we should duplicate it.
 If we do, that might be a bug.


On Thu, Jul 17, 2014 at 8:41 AM, Jan Hoogerbrugge <
jan.hoogerbrugge at gmail.com> wrote:

> Hi,
>
> For a certain type of analysis I generate inline assembly which I insert
> into the LLVM IR code. This
> inline assembly code contains labels that should not be duplicated.
> Problem is that the tail
> duplication pass duplicates code. It checks isNotDuplicatable on a machine
> instruction however
> there is no such a flag on an IR instruction that I could set. Is there a
> way to tell in an IR pass
> that code should not be duplicated?
>
> Jan
>
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