llvm dev - Oct 2011 - [LLVMdev] atomicrmw

Hi!
It is said in http://llvm.org/docs/LangRef.html#i_atomicrmw there is an
atomicrmw opcode.
But:
 store i8 %2, i8* %tape1.sub
 %3  = atomicrmw add i8* %tape1.sub, i8 1 acquire
fails with:
 llc: test.bc:13:9: error: expected instruction opcode
 %3  = atomicrmw add i8* %tape1.sub, i8 1 acquire

How can I do *ptr = *ptr + val with LLVM ?

On Sat, Oct 29, 2011 at 9:53 AM, Роман <humbug at deeptown.org>
wrote:
> Hi!
> It is said in http://llvm.org/docs/LangRef.html#i_atomicrmw there is an
> atomicrmw opcode.
> But:
>  store i8 %2, i8* %tape1.sub
>  %3  = atomicrmw add i8* %tape1.sub, i8 1 acquire
> fails with:
>  llc: test.bc:13:9: error: expected instruction opcode
What version of LLVM are you using?  The documentation you're pointing
at reflects trunk (and the current 3.0 release candidate); the 2.9
docs for the equivalent construct are at
http://llvm.org/releases/2.9/docs/LangRef.html#int_atomic_load_add ,

-Eli