[Bug lto/83997] New: ICE with alias template and attribute

[reichelt at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83997

            Bug ID: 83997
           Summary: ICE with alias template and attribute
           Product: gcc
           Version: 8.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code, lto
          Severity: normal
          Priority: P3
         Component: lto
          Assignee: unassigned at gcc dot gnu.org
          Reporter: reichelt at gcc dot gnu.org
                CC: jakub at gcc dot gnu.org, marxin at gcc dot gnu.org
        Depends on: 83300
  Target Milestone: ---

The valid testcase gcc/testsuite/g++.dg/ext/vector33.C from PR83300
triggers an ICE since GCC 4.7.0 when compiled with -flto:

during IPA pass: fnsummary
bu11.cc:10:1: internal compiler error: tree code 'template_parm_index' is not
supported in LTO streams
 }
 ^
0xd7d163 lto_write_tree
        ../../gcc/gcc/lto-streamer-out.c:442
0xd7d163 lto_output_tree_1
        ../../gcc/gcc/lto-streamer-out.c:483
0xd7d163 DFS::DFS(output_block*, tree_node*, bool, bool, bool)
        ../../gcc/gcc/lto-streamer-out.c:670
0xd7e06d lto_output_tree(output_block*, tree_node*, bool, bool)
        ../../gcc/gcc/lto-streamer-out.c:1642
0xd73732 write_global_stream
        ../../gcc/gcc/lto-streamer-out.c:2492
0xd7c00e lto_output_decl_state_streams(output_block*, lto_out_decl_state*)
        ../../gcc/gcc/lto-streamer-out.c:2539
0xd7c00e produce_asm_for_decls()
        ../../gcc/gcc/lto-streamer-out.c:2908
0xdd9c6f write_lto
        ../../gcc/gcc/passes.c:2613
0xddd32e ipa_write_summaries_1
        ../../gcc/gcc/passes.c:2674
0xddd32e ipa_write_summaries()
        ../../gcc/gcc/passes.c:2734
0xae5bc2 ipa_passes
        ../../gcc/gcc/cgraphunit.c:2468
0xae5bc2 symbol_table::compile()
        ../../gcc/gcc/cgraphunit.c:2558
0xae7be9 symbol_table::compile()
        ../../gcc/gcc/cgraphunit.c:2537
0xae7be9 symbol_table::finalize_compilation_unit()
        ../../gcc/gcc/cgraphunit.c:2717
Please submit a full bug report, [etc.]

Jakub, you fixed PR83300. Would you mind having a look?


Referenced Bugs:

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83300
[Bug 83300] Segmentation fault with template and __attribute__((vector_size
(sizeof(int) * N)));