[Bug ipa/103441] [12 Regression] ICE in cgraph_node::verify_node() building libgo on powerpc64le-linux-gnu (--with-cpu=power9)

hubicka at kam dot mff.cuni.cz gcc-bugzilla@gcc.gnu.org
Fri Nov 26 15:26:17 GMT 2021


https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103441

--- Comment #3 from hubicka at kam dot mff.cuni.cz ---
> #0  gimple_set_bb (stmt=0x3fffb01a2be0, bb=0x0) at ../../gcc/gimple.c:1772
> #1  0x00000000107209b0 in gsi_remove (i=0x3fffffffd7c8,
> remove_permanently=<optimized out>) at ../../gcc/gimple-iterator.c:569
> #2  0x0000000010bddd3c in remove_bb (bb=0x3fffb0de2698) at
> ../../gcc/tree-cfg.c:2338
> #3  0x00000000104aa8a0 in delete_basic_block (bb=<optimized out>) at
> ../../gcc/cfghooks.c:616
> #4  0x0000000010c087f4 in cleanup_control_flow_pre () at
> ../../gcc/tree-cfgcleanup.c:979
> #5  0x0000000010c0b090 in cleanup_tree_cfg_noloop (ssa_update_flags=0) at
> ../../gcc/tree-cfgcleanup.c:1073
> #6  cleanup_tree_cfg (ssa_update_flags=<optimized out>) at
> ../../gcc/tree-cfgcleanup.c:1183

It is not safe to do cleanup_tree_cfg in IPA transform pass since it
does not maintain cgraph edges (which are needed during inliing).
There is delete_unreachable_blocks_update_callgraph.


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