[Bug tree-optimization/67659] [5 regression] ICE: segfault: Linux kernel/rcu/tree.c:3261:6

["trippels at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67659

--- Comment #3 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---

tree.i:13:6: internal compiler error: Segmentation fault
 void fn1(unsigned long p1) {
      ^
0x99d1ef crash_signal
        ../../gcc/gcc/toplev.c:383
0xa5cc22 fold_builtin_alloca_with_align
        ../../gcc/gcc/tree-ssa-ccp.c:2067
0xa5cc22 ccp_fold_stmt
        ../../gcc/gcc/tree-ssa-ccp.c:2172
0xac6866 substitute_and_fold_dom_walker::before_dom_children(basic_block_def*)
        ../../gcc/gcc/tree-ssa-propagate.c:1177
0xea6077 dom_walker::walk(basic_block_def*)
        ../../gcc/gcc/domwalk.c:188
0xac62a9 substitute_and_fold(tree_node* (*)(tree_node*), bool
(*)(gimple_stmt_iterator*), bool)
        ../../gcc/gcc/tree-ssa-propagate.c:1272
0xa54108 ccp_finalize
        ../../gcc/gcc/tree-ssa-ccp.c:941
0xa54108 do_ssa_ccp
        ../../gcc/gcc/tree-ssa-ccp.c:2382
0xa54108 execute
        ../../gcc/gcc/tree-ssa-ccp.c:2414
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I think there is a dup somewhere, but I cannot find it at the moment.