[llvm-commits] [PATCH] Teach SimplifyLibCalls about stpcpy

[David Majnemer]

On Mon, May 14, 2012 at 2:09 AM, Duncan Sands <baldrick at free.fr> wrote:
> Hi David,
>
>> I briefly noticed that strcpy(x, x) for arbitrary x is always turned
>> into a no-op. I figured that stpcpy can easily handle this case if we
>> are willing to calculate strlen(x); this seems like it should always
>> be a net win versus going to the library implementation of stpcpy.
>
> don't forget to add a testcase for this feature.

Added a test case for the stpcpy(x, x) optimization.

-- 
David Majnemer
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