[LLVMdev] Aliasing Question

[sheng wang]

I try to answer your question ,first:
Address compution located in branch block is Good, that. Will reduce
register pressure; may be you can consider lazy code motion optimization as
example.

Second,


Ryan Taylor-5 wrote
> I just have two questions regarding the following small piece of code:
> 
>       if (var > start*end) {
>          arr[var] = arr[var-1];
>       }
>       else {
>          arr[var] = arr[var+1];
>       }
> 
> 1. Why does llvm put the address computation in the branched blocks
> instead
> of the common dominator?
> 2. Why does the AliasAnalysis return MayAlias instead of MustAlias?
> 
> Thanks.
> 
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