search for: nontrapping

...independent. This is best done as late as possible (think instruction scheduling) in a target specific manner. In practice, I've only seen it used for implicit null checks to shave a cycle off some loads and squeeze a tiny amount of performance out of benchmarks. In fact, hardware support for *nontrapping* loads from page zero plus safe speculation would work much better. In my opinion, implicit null checks are not worth the giant support overhead typically caused by a runtime that tries to catch SIGSEGV. I wouldn't expect a user-space signal handler to be used for integer divides, where there...

Hi all, Following John's, Duncan's and Bill's proposals about exception handling, I thought I'd summarise what has been discussed so far. ** The problems we're trying to solve are: P1. Different languages have different EH concepts and IR needs to be agnostic (as possible) about that P2. Inlining and optimisations (currently) destroy the EH semantics and produce code that