* An interesting "optimization"? for __glibcxx_assert under verbose mode @ 2021-10-15 0:30 unlvsur unlvsur 2021-10-15 0:40 ` unlvsur unlvsur 0 siblings, 1 reply; 2+ messages in thread From: unlvsur unlvsur @ 2021-10-15 0:30 UTC (permalink / raw) To: unlvsur unlvsur via Libstdc++ I think the parameter can be just embedded in the symbol name of the function. This improves code gen and make optimizers happier under -Os. But it only works under C++20. This is a proven concept. It works for both gcc and clang https://godbolt.org/z/s35s8MTac https://godbolt.org/z/5KK5PzMEj Os: https://godbolt.org/z/4MjGdTajf https://godbolt.org/z/crfWf41vc Sent from Mail<https://go.microsoft.com/fwlink/?LinkId=550986> for Windows ^ permalink raw reply [flat|nested] 2+ messages in thread
* RE: An interesting "optimization"? for __glibcxx_assert under verbose mode 2021-10-15 0:30 An interesting "optimization"? for __glibcxx_assert under verbose mode unlvsur unlvsur @ 2021-10-15 0:40 ` unlvsur unlvsur 0 siblings, 0 replies; 2+ messages in thread From: unlvsur unlvsur @ 2021-10-15 0:40 UTC (permalink / raw) To: unlvsur unlvsur via Libstdc++, unlvsur unlvsur via Libstdc++ This is a better example that can show the benefit https://godbolt.org/z/aPo95Eb3P https://godbolt.org/z/Wd4nev8eh Sent from Mail<https://go.microsoft.com/fwlink/?LinkId=550986> for Windows From: unlvsur unlvsur<mailto:unlvsur@live.com> Sent: Thursday, October 14, 2021 20:30 To: unlvsur unlvsur via Libstdc++<mailto:libstdc++@gcc.gnu.org> Subject: An interesting "optimization"? for __glibcxx_assert under verbose mode I think the parameter can be just embedded in the symbol name of the function. This improves code gen and make optimizers happier under -Os. But it only works under C++20. This is a proven concept. It works for both gcc and clang https://godbolt.org/z/s35s8MTac https://godbolt.org/z/5KK5PzMEj Os: https://godbolt.org/z/4MjGdTajf https://godbolt.org/z/crfWf41vc Sent from Mail<https://go.microsoft.com/fwlink/?LinkId=550986> for Windows ^ permalink raw reply [flat|nested] 2+ messages in thread
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