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2017 May 17
4
Which pass should be propagating memory copies
Keno, Perhaps you can view the problem to be the memcpys themselves, We humans can look at the memcpys and see loads and stores but to almost all optimizer passes they aren’t what it is looking for, They instead see function calls which they mostly don’t touch, If these memcpys were inlined into plain old loads and stores The redundant loads and stores should be deleted by existing opts