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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)
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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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