Re: [PATCH] SVE popcount support

[Malladi, Rama]

Here is the updated patch using 
pg_attribute_target("arch=armv8-a+sve") to compile the arch-specific 
function instead of using compiler flags.

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This looks good. Thanks Chiranmoy and team. Can you address any other 
feedback from Nathan or others here? Then we can pursue further reviews 
and merging of the patch.