[Bug c++/38986] comparing lengths of 2 strings reads through both strings completely

[bangerth at gmail dot com]

------- Comment #1 from bangerth at gmail dot com  2009-01-30 15:13 -------
Yes, I think this would be an optimizing compiler could potentially perform.
At the same time I think you are expecting too much from the compiler: it
would have to have a semantic understanding of what the strlen function
does and that the result can be obtained by merging the two calls to strlen,
then merging the two loops, and then truncating them.

I don't think that this sort of analysis is going to be available in compilers
anytime soon. Since you already have the solution, maybe this is the way to
go!

Best
 W.


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bangerth at gmail dot com changed:

           What    |Removed                     |Added
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                 CC|                            |bangerth at gmail dot com
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|                            |WONTFIX


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38986