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* [Bug gcov-profile/114851] New: Alternative to -Wmisexpect from LLVM in GCC @ 2024-04-25 9:59 zamazan4ik at tut dot by 2024-04-25 17:01 ` [Bug gcov-profile/114851] " pinskia at gcc dot gnu.org ` (2 more replies) 0 siblings, 3 replies; 4+ messages in thread From: zamazan4ik at tut dot by @ 2024-04-25 9:59 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114851 Bug ID: 114851 Summary: Alternative to -Wmisexpect from LLVM in GCC Product: gcc Version: unknown Status: UNCONFIRMED Severity: normal Priority: P3 Component: gcov-profile Assignee: unassigned at gcc dot gnu.org Reporter: zamazan4ik at tut dot by Target Milestone: --- LLVM infrastructure supports a diagnostic for checking mismatches between user-provided __builtin_expect/[[likely]] hints and PGO profiles: https://clang.llvm.org/docs/DiagnosticsReference.html#wmisexpect + https://llvm.org/docs/MisExpect.html (and an example of its usage in Chromium: https://issues.chromium.org/issues/40694104). I was trying to find a similar diagnostic in GCC but found nothing. Is there anything similar in GCC? If not, can we make the issue a Feature Request for such a feature? Having such a diagnostic can be helpful in practice since it allows for finding wrongfully placed user hints in sources. ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug gcov-profile/114851] Alternative to -Wmisexpect from LLVM in GCC 2024-04-25 9:59 [Bug gcov-profile/114851] New: Alternative to -Wmisexpect from LLVM in GCC zamazan4ik at tut dot by @ 2024-04-25 17:01 ` pinskia at gcc dot gnu.org 2024-04-25 17:02 ` pinskia at gcc dot gnu.org 2024-04-25 17:06 ` zamazan4ik at tut dot by 2 siblings, 0 replies; 4+ messages in thread From: pinskia at gcc dot gnu.org @ 2024-04-25 17:01 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114851 Andrew Pinski <pinskia at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Blocks| |87403 Severity|normal |enhancement --- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> --- I don't think GCC has a warning (yet). Referenced Bugs: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87403 [Bug 87403] [Meta-bug] Issues that suggest a new warning ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug gcov-profile/114851] Alternative to -Wmisexpect from LLVM in GCC 2024-04-25 9:59 [Bug gcov-profile/114851] New: Alternative to -Wmisexpect from LLVM in GCC zamazan4ik at tut dot by 2024-04-25 17:01 ` [Bug gcov-profile/114851] " pinskia at gcc dot gnu.org @ 2024-04-25 17:02 ` pinskia at gcc dot gnu.org 2024-04-25 17:06 ` zamazan4ik at tut dot by 2 siblings, 0 replies; 4+ messages in thread From: pinskia at gcc dot gnu.org @ 2024-04-25 17:02 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114851 --- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> --- (In reply to Andrew Pinski from comment #1) > I don't think GCC has a warning (yet). Though I do wonder if the "hints" are used instead of the PGO here. ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug gcov-profile/114851] Alternative to -Wmisexpect from LLVM in GCC 2024-04-25 9:59 [Bug gcov-profile/114851] New: Alternative to -Wmisexpect from LLVM in GCC zamazan4ik at tut dot by 2024-04-25 17:01 ` [Bug gcov-profile/114851] " pinskia at gcc dot gnu.org 2024-04-25 17:02 ` pinskia at gcc dot gnu.org @ 2024-04-25 17:06 ` zamazan4ik at tut dot by 2 siblings, 0 replies; 4+ messages in thread From: zamazan4ik at tut dot by @ 2024-04-25 17:06 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114851 --- Comment #3 from Alexander Zaitsev <zamazan4ik at tut dot by> --- > Though I do wonder if the "hints" are used instead of the PGO here. We already discussed this question a bit in https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112806 . If I understand correctly, no clear answer yet: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112806#c4 . ^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2024-04-25 17:06 UTC | newest] Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2024-04-25 9:59 [Bug gcov-profile/114851] New: Alternative to -Wmisexpect from LLVM in GCC zamazan4ik at tut dot by 2024-04-25 17:01 ` [Bug gcov-profile/114851] " pinskia at gcc dot gnu.org 2024-04-25 17:02 ` pinskia at gcc dot gnu.org 2024-04-25 17:06 ` zamazan4ik at tut dot by
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