tree 989ad78987dbbb3be3d5eefa38ec0f32cd3a8cad
parent 7d01b85c2a0aa8bc91f731cfeb2a7b6885b8d04a
author Aaron Ballman <aaron@aaronballman.com> 1746191191 -0400
committer GitHub <noreply@github.com> 1746191191 -0400
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[C] Add -Wjump-bypasses-init (#138009)

We already diagnose when a jump bypasses initialization in C++ because
such code is ill-formed there. However, we were not using this to
diagnose those same jumps in C.

-Wjump-bypasses-init is grouped under -Wc++-compat and diagnoses this
situation as a compatibility issue with C++. This diagnostic is off by
default.

The diagnostic could perhaps be enabled by default for C, but due to the
design of jump diagnostic handling, it not a trivial task. For now,
we'll add the diagnostic as off-by-default so we get incremental
improvement, but a follow-up could try to refactor jump diagnostics so
we can enable this by default in C and have it as a C++ compatibility
diagnostic as well.