https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89693

            Bug ID: 89693
           Summary: [9 Regression] ICE: verify_cgraph_node failed (error:
                    edge points to wrong declaration)
           Product: gcc
           Version: 9.0
            Status: UNCONFIRMED
          Keywords: ice-checking, ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: ipa
          Assignee: unassigned at gcc dot gnu.org
          Reporter: asolokha at gmx dot com
                CC: marxin at gcc dot gnu.org
  Target Milestone: ---

g++-9.0.0-alpha20190310 snapshot (r269561) ICEs when compiling
gcc/testsuite/g++.dg/abi/covariant5.C w/ -O3 (-Ofast) -fno-ipa-icf-functions:

% g++-9.0.0-alpha20190310 -O3 -fno-ipa-icf-functions -c
gcc/testsuite/g++.dg/abi/covariant5.C
gcc/testsuite/g++.dg/abi/covariant5.C:52:1: error: edge points to wrong
declaration:
   52 | }
      | ^
 <function_decl 0x7fbf10e59100 _ZTch0_h8_N1C3TwoEv.constprop
    type <function_type 0x7fbf10e40f18
        type <pointer_type 0x7fbf10e1cdc8 type <record_type 0x7fbf10e1cc78 C>
            public unsigned DI
            size <integer_cst 0x7fbf10cb0e28 constant 64>
            unit-size <integer_cst 0x7fbf10cb0e40 constant 8>
            align:64 warn_if_not_align:0 symtab:0 alias-set -1 canonical-type
0x7fbf10e1cdc8>
        QI
        size <integer_cst 0x7fbf10cb0f18 constant 8>
        unit-size <integer_cst 0x7fbf10cb0f30 constant 1>
        align:8 warn_if_not_align:0 symtab:0 alias-set -1 canonical-type
0x7fbf10e40f18
        arg-types <tree_list 0x7fbf10cc4870 value <void_type 0x7fbf10ccef18
void>>>
    readonly addressable used nothrow decl_5 QI
gcc/testsuite/g++.dg/abi/covariant5.C:21:14 align:8 warn_if_not_align:0 context
<record_type 0x7fbf10e1cc78 C>>
 Instead of: <function_decl 0x7fbf10e0c900 _ZTchn8_h8_N1C3TwoEv
    type <method_type 0x7fbf10e1cf18
        type <pointer_type 0x7fbf10e1cdc8 type <record_type 0x7fbf10e1cc78 C>
            public unsigned DI
            size <integer_cst 0x7fbf10cb0e28 constant 64>
            unit-size <integer_cst 0x7fbf10cb0e40 constant 8>
            align:64 warn_if_not_align:0 symtab:0 alias-set -1 canonical-type
0x7fbf10e1cdc8>
        QI
        size <integer_cst 0x7fbf10cb0f18 constant 8>
        unit-size <integer_cst 0x7fbf10cb0f30 constant 1>
        align:8 warn_if_not_align:0 symtab:0 alias-set -1 canonical-type
0x7fbf10e1cf18 method basetype <record_type 0x7fbf10e1cc78 C>
        arg-types <tree_list 0x7fbf10e094d8 value <pointer_type 0x7fbf10e1cdc8>
            chain <tree_list 0x7fbf10cc4870 value <void_type 0x7fbf10ccef18
void>>>
        pointer_to_this <pointer_type 0x7fbf10e1f7e0>>
    readonly addressable asm_written used nothrow public virtual decl_5 QI
gcc/testsuite/g++.dg/abi/covariant5.C:21:14 align:8 warn_if_not_align:0 context
<record_type 0x7fbf10e1cc78 C>
    full-name "virtual C* C::_ZTchn8_h8_N1C3TwoEv()"
   >
main/24 (int main()) @0x7fbf10e375a0
  Type: function definition analyzed
  Visibility: externally_visible public
  References: 
  Referring: 
  Availability: available
  Function flags: count:1073741824 (estimated locally) body
only_called_at_startup executed_once
  Called by: 
  Calls: virtual C& C::_ZTchn8_h8_N1C5ThreeEv()/12 (487586162 (estimated
locally),0.45 per call) _ZTch0_h8_N1C3TwoEv.constprop/41 (1073741824 (estimated
locally),1.00 per call) 
during IPA pass: cp
gcc/testsuite/g++.dg/abi/covariant5.C:52:1: internal compiler error:
verify_cgraph_node failed
0xb7573c cgraph_node::verify_node()
       
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190310/work/gcc-9-20190310/gcc/cgraph.c:3444
0xb696bc symtab_node::verify()
       
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190310/work/gcc-9-20190310/gcc/symtab.c:1225
0xb69797 symtab_node::verify_symtab_nodes()
       
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190310/work/gcc-9-20190310/gcc/symtab.c:1245
0xdc6997 symtab_node::checking_verify_symtab_nodes()
       
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190310/work/gcc-9-20190310/gcc/cgraph.h:637
0xdc6997 symbol_table::remove_unreachable_nodes(_IO_FILE*)
       
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190310/work/gcc-9-20190310/gcc/ipa.c:667
0xeb8969 execute_todo
       
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190310/work/gcc-9-20190310/gcc/passes.c:2045

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