CHAI Add CMake option for initializing all memory to 0

In some cases, it is desirable to have memory initialized to 0 (particularly for debugging). This option is controlled by passing CHAI_ENABLE_ZERO_INITIALIZED_MEMORY=ON to CMake. It is off by default to avoid imposing any overhead.

Mar 25 '22 14:03 adayton1

I don't think the CI failure is related to my change. Looks like some build artifacts are not cleaned up correctly.

Mar 25 '22 15:03 adayton1

Would it be also useful to be able to initialize values to like the maximum of the range so you would trigger an overflow if not initialized?

Mar 25 '22 15:03 rrsettgast

Are you thinking something like std::numeric_limits<T>::max()? I like the idea, but it does get a little more complicated since the particular type is not available for the ArrayManager::allocate (it appears to be available for ArrayManager::reallocate, however). So either we would have to add the type for the ArrayManager::allocate call, or we would have to plumb this into the ManagedArray class itself. @davidbeckingsale, any ideas?

Mar 25 '22 20:03 adayton1