Clean assignments for SIMD copy

[shapaz]

Is your feature request related to a problem? Please describe.
I am decompiling ARM 32bit code that uses SIMD optimisations for copying data, i.e., instead of moving data as words with ldr/str instructions, the compiler copies multiple values at once with vld1.64/vst1.32:

The decompiler, despite showing the operation as distinct assignments, presents confusing code that combines the input values with CONCAT then separates it with casts and shifts:

Describe the solution you'd like
I would like to see the decompiled code as distinct assignments of each value, since it always holds that:

(int)CONCAT44(x,y) == y
(int)(CONCAT44(x,y)>>32) == x