[LLVMdev] Fwd: folding x * 0 = 0

[Chris Lattner]

On Mar 3, 2010, at 11:52 PM, Paul Davey wrote:

> sorry forgot to change address :/
> Rob:
> 
> from original post:
> 
> I would expect the following optimizations, but didn't find them in the
> code:
> x  + 0 = x
> x * 0 = 0
> x * 1 = 1
> x * -1 = -x

Take a look at lib/Analysis/InstructionSimplify.cpp

-Chris
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