gcc is a fine compiler but... 2020-03

By: Michael S (already5chosen.delete@this.yahoo.com), March 9, 2020 3:05 pm
Room: Moderated Discussions
The first gcc bashing thread of the new decode. Hopefully, not the last.

https://godbolt.org/z/pkXsfc

As you can see in foo1(), gcc9 finally figured out a peephole optimization that clang used since v.4 and Icc approximately forever.
Isn't it great? Of course it is, but ... as you can see in foo2(), if one tries to do the same not too complicated action twice, then compiler immediately forgets everything it knew about peepholes.
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gcc is a fine compiler but... 2020-03Michael S2020/03/09 03:05 PM
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