Re:Popcount CPU instruction
by wumpus on Sunday September 08, 2019 @11:39PM
(#20915044)
The cynical answer is "anything that's in the SPECcpu benchmarks".
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SPEC is full of undefined behavior, so as far as I know many compiler engineers dislike it because it “breaks” when compilers get better.
That’s the wrong attitude. If it has undefined behavior, then a valid response is to inject malware to cause the benchmark to return a fast result.