[LLVMdev] Shifts that use only 5 LSBs.

[Daniel M Gessel]

Got the update to LLVM.

Thanks,

Dan

On Dec 18, 2008, at 5:19 PM, Eli Friedman wrote:

> On Thu, Dec 18, 2008 at 1:40 PM, Daniel M Gessel <gessel at apple.com>  
> wrote:
>> I can't find the bug you refer to.
>
> Did the link not work?  I'll try pasting it in again.  In any case, I
> checked in a fix disabling the broken optimization; try updating to
> current SVN.
>
> http://llvm.org/bugs/show_bug.cgi?id=3225
>
>> Also, it doesn't have this problem in x86: it uses the shldl
>> instruction.
>
> Well, sort of... it turned out that it wasn't that hard to construct a
> case that broke on x86.
>
> -Eli
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