[Bug c++/98859] pedantic error on use of __VA_OPT__ before C++20 is unnecessary and counterproductive

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98859 Yongwei Wu changed: What|Removed |Added CC||wuyongwei at gmail dot com --- Comment #2 f

[Bug target/80878] -mcx16 (enable 128 bit CAS) on x86_64 seems not to work on 7.1.0

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80878 --- Comment #29 from Yongwei Wu --- As usual, test results are always elusive. I have to add yet another important piece of information. The very bad performance result does not occur on Linux, but only on macOS (Homebrew versions of GCC and liba

[Bug target/80878] -mcx16 (enable 128 bit CAS) on x86_64 seems not to work on 7.1.0

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80878 --- Comment #28 from Yongwei Wu --- OK, somewhat answering myself. I was not aware of the fact that 128-bit atomic read has to be implemented using cmpxchg16b as well, thus defeating some non-CAS usage scenarios. The natural question is: which u

[Bug target/80878] -mcx16 (enable 128 bit CAS) on x86_64 seems not to work on 7.1.0

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80878 Yongwei Wu changed: What|Removed |Added CC||wuyongwei at gmail dot com --- Comment #27

[Bug target/94649] 16-byte aligned atomic_compare_exchange doesn not generate cmpxcg16b on x86_64

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94649 Yongwei Wu changed: What|Removed |Added CC||wuyongwei at gmail dot com --- Comment #3 f

[Bug c++/98283] New: decltype(auto) may be deduce static data member to wrong type

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98283 Bug ID: 98283 Summary: decltype(auto) may be deduce static data member to wrong type Product: gcc Version: 10.0 Status: UNCONFIRMED Severity: normal P