[llvm-commits] [llvm] r108695 - /llvm/trunk/lib/VMCore/Use.cpp

[Chris Lattner]

On Jul 19, 2010, at 7:48 AM, Gabor Greif wrote:

> Author: ggreif
> Date: Mon Jul 19 09:48:15 2010
> New Revision: 108695
> 
> URL: http://llvm.org/viewvc/llvm-project?rev=108695&view=rev
> Log:
> precompute 20 tags

Hi Gabor,

What does this do?

-Chris

> 
> Modified:
>    llvm/trunk/lib/VMCore/Use.cpp
> 
> Modified: llvm/trunk/lib/VMCore/Use.cpp
> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/VMCore/Use.cpp?rev=108695&r1=108694&r2=108695&view=diff
> ==============================================================================
> --- llvm/trunk/lib/VMCore/Use.cpp (original)
> +++ llvm/trunk/lib/VMCore/Use.cpp Mon Jul 19 09:48:15 2010
> @@ -86,11 +86,17 @@
> //===----------------------------------------------------------------------===//
> 
> Use *Use::initTags(Use * const Start, Use *Stop, ptrdiff_t Done) {
> -  while (Done < 6) {
> +  while (Done < 20) {
>     if (Start == Stop--)
>       return Start;
> -    static const PrevPtrTag tags[6] = { fullStopTag, oneDigitTag, stopTag,
> -                                        oneDigitTag, oneDigitTag, stopTag };
> +    static const PrevPtrTag tags[20] = { fullStopTag, oneDigitTag, stopTag,
> +                                         oneDigitTag, oneDigitTag, stopTag,
> +                                         zeroDigitTag, oneDigitTag, oneDigitTag,
> +                                         stopTag, zeroDigitTag, oneDigitTag,
> +                                         zeroDigitTag, oneDigitTag, stopTag,
> +                                         oneDigitTag, oneDigitTag, oneDigitTag,
> +                                         oneDigitTag, stopTag
> +                                       };
>     Stop->Prev.setFromOpaqueValue(reinterpret_cast<Use**>(tags[Done++]));
>     Stop->Val = 0;
>   }
> 
> 
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