[LLVMdev] Implementing llvm.memory.barrier on PowerPC

[Dale Johannesen]

On Aug 19, 2008, at 7:18 AMPDT, Gary Benson wrote:

> Hi all,
>
> I'm trying to implement llvm.memory.barrier on PowerPC.  I've modelled
> my patch (attached) on the implementation in X86, but when I try and
> compile my test file (also attached) with llc I get the error "Cannot
> yet select: 0x10fa4ad0: ch = MemBarrier 0x10fa4828, 0x10fa4c68,
> 0x10fa4be0, 0x10fa4be0, 0x10fa4be0, 0x10fa4be0".  This presumably
> means my "membarrier" pattern isn't being found... but why?
>
> Thanks in advance,
> Gary

Because the i1's in the .bc file get promoted to i32 on ppc, instead  
of i8.
I've forgotten why this is, there's a setting somewhere.  If you  
change the
i8's in membarrier to i32's it works.
Thanks for doing this btw.

> --
> http://gbenson.net/
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