[LLVMdev] Local common subexpression elimination

[Evan Cheng]

On Oct 15, 2008, at 8:55 PM, Nicolas Capens wrote:

> Hi all,
>
> Is there any existing pass that performs fast local common  
> subexpression elimination?
>
> The reason I’m asking is because global common subexpression  
> elimination (GVN or GVN-PRE) is too slow for my JIT purposes, but I  
> see lots of value in local CSE.

What kinds of expressions? SelectionDAG does essentially what you want  
automatically when nodes are created.

Evan

>
> Thanks,
>
> Nicolas
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