[Bug lto/79760] New: ICE in type_in_anonymous_namespace_p in ipa-utils.h:219

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79760

            Bug ID: 79760
           Summary: ICE in type_in_anonymous_namespace_p in
                    ipa-utils.h:219
           Product: gcc
           Version: 7.0
               URL: https://bugzilla.opensuse.org/show_bug.cgi?id=1026915
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: lto
          Assignee: unassigned at gcc dot gnu.org
          Reporter: marxin at gcc dot gnu.org
                CC: hubicka at ucw dot cz
  Target Milestone: ---
            Target: avr-linux-gnu

Hello.

This bug comes from openSUSE bugzilla, where we ICE in cross-avr compiler:

~/Programming/gcc3/objdir/gcc/lto1 -mno-skip-bug -quiet -dumpdir ./ -dumpbase
application.elf.wpa -mn-flash=1 -mmcu=avr5 -mn-flash=1 -mno-skip-bug -mmcu=avr5
-auxbase application-main -g -Os -version
-fltrans-output-list=application.elf.ltrans.out -fwpa -fresolution=my.res
-flinker-output=exec application-main.o gate.o gate_debounce.o
GNU GIMPLE (GCC) version 6.3.1 20170228 (avr-elf)
        compiled by GNU C version 6.3.1 20170202 [gcc-6-branch revision
245119], GMP version 6.1.2, MPFR version 3.1.5, MPC version 1.0.3, isl version
0.15
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
GNU GIMPLE (GCC) version 6.3.1 20170228 (avr-elf)
        compiled by GNU C version 6.3.1 20170202 [gcc-6-branch revision
245119], GMP version 6.1.2, MPFR version 3.1.5, MPC version 1.0.3, isl version
0.15
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
lto1: internal compiler error: Segmentation fault
0xbf0a76 crash_signal
        ../../gcc/toplev.c:333
0x730068 type_in_anonymous_namespace_p(tree_node const*)
        ../../gcc/ipa-utils.h:219
0x9d4822 maybe_record_node
        ../../gcc/ipa-devirt.c:2467
0x9d5cb0 possible_polymorphic_call_targets(tree_node*, long,
ipa_polymorphic_call_context, bool*, void**, bool)
        ../../gcc/ipa-devirt.c:3186
0x7d9148 possible_polymorphic_call_targets(cgraph_edge*, bool*, void**, bool)
        ../../gcc/ipa-utils.h:115
0xa0e89a walk_polymorphic_call_targets
        ../../gcc/ipa.c:167
0xa0f34a symbol_table::remove_unreachable_nodes(_IO_FILE*)
        ../../gcc/ipa.c:428
0xb2aa7e execute_todo
        ../../gcc/passes.c:2024

where:

$ (gdb) p debug_tree(target)
 <function_decl 0x7ffff692f9a0 __cxa_pure_virtual
    type <function_type 0x7ffff6935c78
        type <void_type 0x7ffff6886150 void VOID
            align 8 symtab 0 alias set -1 structural equality
            pointer_to_this <pointer_type 0x7ffff68862a0>>
        QI
        size <integer_cst 0x7ffff6876a20 constant 8>
        unit size <integer_cst 0x7ffff6876a38 constant 1>
        align 8 symtab 0 alias set -1 structural equality
        arg-types <tree_list 0x7ffff6879ac8 value <void_type 0x7ffff6886150
void>>
        pointer_to_this <pointer_type 0x7ffff6935e70>>
    readonly addressable nothrow static function-specific-opt HI file gate.cpp
line 21 col 17 align 8 context <translation_unit_decl 0x7ffff6931078 D.1479>>

(gdb) p e->caller->debug()
_ZN4Gate11maybeReEvalEv/5 (maybeReEval) @0x7ffff693d170
  Type: function definition analyzed
  Visibility: prevailing_def_ironly
  Aux: @0x7ffff6934480  References: 
  Referring: 
  Read from file: application-main.o
  Availability: local
  First run: 0
  Function flags: local optimize_size
  Called by: main/12 (100.00 per call) 
  Calls: 
   Polymorphic indirect call of type struct Gate token:0(0.39 per call)  of
param:0
    Outer type (dynamic):struct Gate (or a derived type) offset 0

One can debug that with gcc-6-branch and ../configure --target=avr-elf
--enable-languages=c,c++
It's not trivial to provide all cross libc, bintuils, etc.

I'll attach the 3 objects and:

$ cat my.res 
3
application-main.o 16
258 478ff6477416a70d PREVAILING_DEF_IRONLY global_error
209 478ff6477416a70d PREVAILING_DEF_IRONLY _ZN4Gate11maybeReEvalEv
215 478ff6477416a70d PREVAILING_DEF_IRONLY _Z22register_for_pinchangehP4Gate
219 478ff6477416a70d PREVAILING_DEF_IRONLY _Z9unmarshalv
260 478ff6477416a70d PREVAILING_DEF_IRONLY n_gates
267 478ff6477416a70d PREVAILING_DEF_IRONLY gate_array
222 478ff6477416a70d PREVAILING_DEF main
270 478ff6477416a70d PREVAILING_DEF_IRONLY soft_IFR
272 478ff6477416a70d PREVAILING_DEF_IRONLY maskC
274 478ff6477416a70d PREVAILING_DEF_IRONLY maskB
280 478ff6477416a70d PREVAILING_DEF_IRONLY portvalC
282 478ff6477416a70d PREVAILING_DEF_IRONLY portvalB
278 478ff6477416a70d UNDEF mem_address
242 478ff6477416a70d RESOLVED_IR _ZN9DebouncerC1Ev
253 478ff6477416a70d RESOLVED_IR _Znwj
256 478ff6477416a70d RESOLVED_IR _Z15eeprom_get_bytev
gate.o 3
206 5bdf351e009d9cff PREVAILING_DEF_IRONLY _ZN4Gate7timeoutEv
209 5bdf351e009d9cff PREVAILING_DEF_IRONLY __cxa_pure_virtual
196 5bdf351e009d9cff PREVAILING_DEF_IRONLY _ZTV4Gate
gate_debounce.o 7
220 f5c19cd596cdbebb PREVAILING_DEF_IRONLY _ZN9Debouncer4evalEv
223 f5c19cd596cdbebb PREVAILING_DEF_IRONLY _ZN9DebouncerC2Ev
209 f5c19cd596cdbebb PREVAILING_DEF_IRONLY _ZTV9Debouncer
226 f5c19cd596cdbebb PREVAILING_DEF_IRONLY _ZN9DebouncerC1Ev
232 f5c19cd596cdbebb RESOLVED_IR _ZN4Gate7timeoutEv
238 f5c19cd596cdbebb RESOLVED_IR _Z22register_for_pinchangehP4Gate
242 f5c19cd596cdbebb RESOLVED_IR _Z15eeprom_get_bytev