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That seems very odd - if it's possible to make those optimisations without any additional type data then why wouldn't GCC do that anyway? The benefit of stricte
by _qib3 9mo ago
That seems very odd - if it's possible to make those optimisations without any additional type data then why wouldn't GCC do that anyway? The benefit of stricter type rules is that more information is available to the compiler. Using a different compiler doesn't inherently increase the amount of type information.
- tcfhgj 9mo agotheoretically the C++ compiler needs to consider things like exceptions which don't exist in C, so I'd even tend to the opposite
- aw1621107 9mo agoI believe the claim is more precisely stated as "Many C programs are valid C++ and are faster when compiled as C++" - i.e., even though the text of the program didn't change, the rules for interpreting that text changed, and it's that difference in interpretation that permits better optimizations.