Re: Will C++ compilers ever be better than C compilers?

Daniel Villeneuve <danielv@crt.umontreal.ca> wrote:
>mayan@watson.ibm.com (Mayan Moudgill) writes:
>
>Besides considering the practical aspects of compiler implementation,
>there are also aspects of the C++ language that might affect the way a
>C++ compiler deals with C-like code.


>Doesn't this paragraph imply that a C++ compiler is more constrained
>that a C compiler when dealing with complex expressions, even if such
>expressions only contain C constructs?


Nope, not really. Additional sequence points for things like new and
converstion function can't affect C style code, as C style code
neither has nor uses new, or converstion functions.


For the others, the as-if rule in C++ and in C, ensures that almost
all remaining differences turn out to be insignificant or 0. Do you
have an example of something that necessarily is slower in c++? Our
(ANSI/ISO C++) intent wasn't to create a difference, though it may be
possible to find one. Even if one is managed to be found, the
performance impact will turn out to be trivial.
--

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