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In r16-4212 I had to tweak two spots in the gimplifier to ignore gotos jumping to labels with the new VACUOUS_INIT_LABEL_P flag (set by C++ FE when implementing goto/case interceptors with extra .DEFERRED_INIT calls, so that jumps over vacuous initialization are handled properly with the C++26 erroneous behavior requirements). Except as the following testcase shows, the checks blindly assumed that gimple_goto_dest operand is a LABEL_DECL, which is not the case for computed jumps. The following patch checks that gimple_goto_dest argument is a LABEL_DECL before testing VACUOUS_INIT_LABEL_P flag on it. 2025-11-21 Jakub Jelinek <jakub@redhat.com> PR middle-end/122773 * gimplify.cc (collect_fallthrough_labels): Check whether gimple_goto_dest is a LABEL_DECL before testing VACUOUS_INIT_LABEL_P. (expand_FALLTHROUGH_r): Likewise. * gcc.dg/pr122773.c: New test.
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