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.
