tree 42db64c9f959b325272eb4eb5861530faef209e6
parent 5defe490c9b1356916245e1832859c361ac8d812
author Aaron Ballman <aaron@aaronballman.com> 1747326252 -0400
committer GitHub <noreply@github.com> 1747326252 -0400
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[C] Silence unreachable -Watomic-access diagnostics (#140064)

Accessing the member of a structure or union which is _Atomic-qualified
is undefined behavior in C. We currently diagnose that with a warning
that defaults to an error. In turn, this means we reject a valid program
if the access it not reachable because of the error. e.g.,

  if (0)
    SomeAtomicStruct.Member = 12; // Was diagnosed

This silences the diagnostic if the member access is not reachable.