Missing Structure Field Assignments via __builtin_memcpy on Stack Vars

[w1282]

What is the feature you'd like to have?
When the destination of a call to __builtin_memcpy is a stack variable that has been typed with a structure, it would be nice for the __builtin_memcpy to be exploded into a series of structure field assignments, in a similar fashion to how non-stack variable static assignments are handled.

Is your feature request related to a problem?
There is a loss of clarity when a stack-local structure is initialized with default values and those get optimized into a single static assignment which gets translated into a __builtin_memcpy call. See below screenshot for example.

Are any alternative solutions acceptable?
None that I have considered.

Additional Information:
Please add any other context or screenshots that would help us understand your feature request here.

[bpotchik]

Fixed in 3.5.4292-dev.