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A comment on Being Sneaky in C. Parent comment

Re:Being Sneaky in C by pcwalton on Saturday June 13, 2015 @01:30AM (#9710006)
Compilers have been doing this for a long time. The optimizations that this enables are essential for performance. They shouldn't stop; if the spec prohibits it, the spec should change (and if it doesn't, the compilers should ignore the spec).
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Re:Being Sneaky in C by TheLoneWolfling on Saturday June 13, 2015 @01:44AM (#9710044)
Good to know about the first and last part.

And as for the second part... Meh. I don't see any optimizations that hard-coding calling something named "memcpy" (or whatever) does that cannot be enabled by looking at the actual code that gets linked. Albeit with more difficulty.

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