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The following testcase shows -fcompare-debug bugs in ifcvt_local_dce, where the decisions what statements are needed is based also on debug stmt operands, which is wrong. So, this patch makes sure to never add debug stmt to the worklist, or never add an assign to worklist just because it is used in a debug stmt in another bb. 2020-03-24 Jakub Jelinek <jakub@redhat.com> PR debug/94283 * tree-if-conv.c (ifcvt_local_dce): For gimple debug stmts, just set GF_PLF_2, but don't add them to worklist. Don't add an assigment to worklist or set GF_PLF_2 just because it is used in a debug stmt in another bb. Formatting improvements. * gcc.target/i386/pr94283.c: New test.
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