[llvm-dev] SROA and volatile memcpy/memset

[Krzysztof Parzyszek via llvm-dev]

On 11/10/2015 1:29 PM, Joerg Sonnenberger via llvm-dev wrote:
>
> But a copy and overwrite would violate the volatile rules?

The copy and overwrite were both in the original code. SROA tries to 
optimize the overwrite away, but in doing so, it breaks up the memcpy 
into several instructions. Now, because they are all volatile, we can't 
do much to optimize them.

-Krzysztof

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