[Bug target/110551] [11/12/13/14 Regression] an extra mov when doing 128bit multiply

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110551 --- Comment #9 from Moncef Mechri --- With Roger's latest patch, codegen looks good with -O2 and -O2 -march=haswell. Thanks! I think this can be marked as resolved?

[Bug target/110551] [11/12/13/14 Regression] an extra mov when doing 128bit multiply

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110551 --- Comment #6 from Moncef Mechri --- I confirm the extra mov disappears thanks to Roger's patch. However, the codegen still seems suboptimal to me when using -march=haswell or newer, even with Roger's patch: uint64_t mulx64(uint64_t x) {

[Bug c++/111297] New: missed optimization: [[unlikely]] attribute has no effect at -O2/-O3/-Ofast

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111297 Bug ID: 111297 Summary: missed optimization: [[unlikely]] attribute has no effect at -O2/-O3/-Ofast Product: gcc Version: 10.0 Status: UNCONFIRMED Severity: no

[Bug c++/96780] debuginfo for std::move and std::forward isn't useful

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96780 Moncef Mechri changed: What|Removed |Added CC||moncef.mechri at gmail dot com --- Comme

[Bug target/110551] [11/12/13/14 Regression] an extra mov when doing 128bit multiply

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110551 --- Comment #3 from Moncef Mechri --- > Please next time attach (which you can do paste in the box) or paste inline > the testcase rather than just link to godbolt . Noted. Apologies. > It is an older regression though. > ``` > #include > >

[Bug rtl-optimization/110551] New: [11 / 12 / 13 /14 regression] Suboptimal codegen for 128 bits multiplication on x86_64

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110551 Bug ID: 110551 Summary: [11 / 12 / 13 /14 regression] Suboptimal codegen for 128 bits multiplication on x86_64 Product: gcc Version: 11.0 Status: UNCONFIRMED S