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The inclusion of this early return statement has been discussed before, it was ultimately left out of the original patch, but it turns out to be necessary. When a callback edge is being created, it is first created by symbol_table::create_edge, which is where it is added to the call site hash. However, its callback flag is not set at that point, so the early return for callback edges doesn't affect it. This causes the wrong edge to be hashed, ultimately leading to segfaults and ICEs. This happens many times in the testsuite, the one I noticed first was libgomp.fortran/simd7.f90. gcc/ChangeLog: PR ipa/122358 * cgraph.cc (cgraph_add_edge_to_call_site_hash): Add an early return when the hashed edge is a callback-carrying edge. Signed-off-by: Josef Melcr <josef.melcr@suse.com>
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