[llvm-commits] [PATCH] AndOrXor Chain Optimization

[Daniel Nicácio]

New unified diff file attached.

Daniel Nicacio

2011/8/4 Eli Friedman <eli.friedman at gmail.com>

> 2011/8/4 Daniel Nicácio <dnicacios at gmail.com>
>
>>  Hi, this patch increments the instcombiner pass.
>> It adds a new XOR, OR, AND optimization, trying to find a chain of logical
>> instructions (xor, and, or) operating on different bits of the same word. If
>> this chain is found, it is collapsed into a single logical instruction.
>> The figure below shows a generic example:
>>
>> Any comments and critics are welcome.
>>
>
> Please attach a single diff containing all the changes, and please use "svn
> diff" or some other tool that makes a unified diff.
>
> -Eli
>
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