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

[David Majnemer]

On Sun, May 13, 2012 at 4:52 PM, David Majnemer
<david.majnemer at gmail.com> wrote:
> The attached patch converts stpcpy(x, "some_litteral") into a memcpy
> and a GetElementPointer instruction.

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.

-- 
David Majnemer
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