Speedup Function::getIntrinsicID() with caching of result

[Renato Golin]

On 1 March 2013 19:41, Jean-Luc Duprat <jduprat at apple.com> wrote:

> After this change:
> $ time ./bin/llc  -march=arm -mattr=+neon vsub_JLD2.ll -O0
> real    0m10.440s (-5%)
> $ time ./bin/llc  -march=arm -mattr=+neon vsub_JLD2.ll -O2
> real    0m11.383s (-5%)
>

Wow, that's a big difference from the original 10%, but the times are also
different, so I wonder how much it is really the changes and how much was
noise...

--renato
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