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From: "burnus at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug lto/65607] New: [5 Regression] LTO: ICE (segfault) with -fno-use-linker-plugin in symtab_node::semantically_equivalent_p
Date: Fri, 27 Mar 2015 17:05:00 -0000
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X-Bugzilla-Component: lto
X-Bugzilla-Version: 5.0
X-Bugzilla-Keywords: ice-on-valid-code
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65607

            Bug ID: 65607
           Summary: [5 Regression] LTO: ICE (segfault) with
                    -fno-use-linker-plugin in
                    symtab_node::semantically_equivalent_p
           Product: gcc
           Version: 5.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: lto
          Assignee: unassigned at gcc dot gnu.org
          Reporter: burnus at gcc dot gnu.org
                CC: hubicka at gcc dot gnu.org

Created attachment 35165
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=35165&action=edit
input.ii - compile with g++ -std=c++11 -flto -fno-use-linker-plugin -O3

That's with GCC 5 (r221725) on a x86-64 CentOS 6.6 with
binutils-2.20.51.0.2-5.42.el6.x86_64.

$ g++ -std=c++11 -flto -fno-use-linker-plugin -O3 input.ii

compilation fails with:

0xce160f crash_signal
        ../../gcc/toplev.c:383
0x928b40 symtab_node::semantically_equivalent_p(symtab_node*)
        ../../gcc/symtab.c:1631
0x932c86 cgraph_edge::resolve_speculation(tree_node*)
        ../../gcc/cgraph.c:1169
0xb326a3 redirect_to_unreachable
        ../../gcc/ipa-inline-analysis.c:771
0xb326a3 edge_set_predicate
        ../../gcc/ipa-inline-analysis.c:797
0xb37ffd inline_summary_t::duplicate(cgraph_node*, cgraph_node*,
inline_summary*, inline_summary*)
        ../../gcc/ipa-inline-analysis.c:1249
0x92e2cb symbol_table::call_cgraph_duplication_hooks(cgraph_node*,
cgraph_node*)
        ../../gcc/cgraph.c:500
0x94141d cgraph_node::create_virtual_clone(vec<cgraph_edge*, va_heap, vl_ptr>,
vec<ipa_replace_map*, va_gc, vl_embed>*, bitmap_head*, char const*)
        ../../gcc/cgraphclones.c:649
0x12ca927 create_specialized_node
        ../../gcc/ipa-cp.c:3275
0x12cbeb6 decide_about_value<tree_node*>
        ../../gcc/ipa-cp.c:4096
0x12cecd8 decide_whether_version_node
        ../../gcc/ipa-cp.c:4141
0x12cecd8 ipcp_decision_stage
        ../../gcc/ipa-cp.c:4302
0x12cecd8 ipcp_driver
        ../../gcc/ipa-cp.c:4417
0x12cecd8 execute
        ../../gcc/ipa-cp.c:4510