numba
Add "align" option for `IRBuilder.alloca`
In official LLVMIR documentation , the alloca instruction has an optional align argument (at least in textural representation). When not specified, it is up to the target to choose a "convenient"
boundary for the type. llvmlite's alloca instruction doesn't have this argument and is always restricted to the target's alignment. This could leave some performance optimization on the table.
I think this could also be a correctness issue if we're aiming to interoperate with code that requires particular alignment of structures - for example, IIRC complex values on CUDA are represented by a struct of 2 floats with an 8-byte alignment even when the natural alignment for that struct would be 4 bytes (I think @nvlcambier and I ran into this).
Bumped into this issue too today, 1 year later. I would also appreciate it if the "addrspace" option could also be added.
