[Bug lto/95572] New: lto1: internal compiler error: in lto_input_tree_ref, at lto-streamer-in.c:370

[Bug lto/95572] New: lto1: internal compiler error: in lto_input_tree_ref, at lto-streamer-in.c:370

[sujian.liu at huawei dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95572

            Bug ID: 95572
           Summary: lto1: internal compiler error: in lto_input_tree_ref,
                    at lto-streamer-in.c:370
           Product: gcc
           Version: lto
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: lto
          Assignee: unassigned at gcc dot gnu.org
          Reporter: sujian.liu at huawei dot com
                CC: marxin at gcc dot gnu.org
  Target Milestone: ---

Created attachment 48700
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=48700&action=edit
Test case

The version used by GCC is 7.3.0.
Only under the O0 option, ICE will appear, and O1+ will not report an error.

When I use the riscv compiler,the following ICE will be reported: 

riscv32-unknown-elf-gcc vla-16.c -lm -o ./vla-16.exe -flto

In function 'f5':
lto1: internal compiler error: in lto_input_tree_ref, at lto-streamer-in.c:370
0x55b22e6f8b48 ???
        ../sysdeps/x86_64/start.S:108
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
lto-wrapper: fatal error: riscv32-unknown-elf-gcc returned 1 exit status
compilation terminated.
/home/lsj/0608/hcc_riscv32/bin/../lib/gcc/riscv32-unknown-elf/7.3.0/../../../../riscv32-unknown-elf/bin/ld:
error: lto-wrapper failed
collect2: error: ld returned 1 exit status

=============================================================================

When I use the x86_64-linux-gnu compiler,the following ICE will be reported:

gcc vla-16.c -lm -o ./vla-16.exe -flto

In function ‘f3’:
lto1: internal compiler error: in lto_input_tree_ref, at lto-streamer-in.c:370
0x8431e8 lto_input_tree_ref(lto_input_block*, data_in*, function*, LTO_tags)
        ../../gcc/lto-streamer-in.c:370
0x84337d lto_input_tree_1(lto_input_block*, data_in*, LTO_tags, unsigned int)
        ../../gcc/lto-streamer-in.c:1446
0x84363b lto_input_tree(lto_input_block*, data_in*)
        ../../gcc/lto-streamer-in.c:1492
0xaf96c5 lto_input_ts_exp_tree_pointers
        ../../gcc/tree-streamer-in.c:895
0xaf96c5 streamer_read_tree_body(lto_input_block*, data_in*, tree_node*)
        ../../gcc/tree-streamer-in.c:1081
0x842caf lto_read_tree_1
        ../../gcc/lto-streamer-in.c:1333
0x8433c7 lto_read_tree
        ../../gcc/lto-streamer-in.c:1363
0x8433c7 lto_input_tree_1(lto_input_block*, data_in*, LTO_tags, unsigned int)
        ../../gcc/lto-streamer-in.c:1475
0x8435b2 lto_input_scc(lto_input_block*, data_in*, unsigned int*, unsigned
int*)
        ../../gcc/lto-streamer-in.c:1387
0x843614 lto_input_tree(lto_input_block*, data_in*)
        ../../gcc/lto-streamer-in.c:1490
0x8443a9 input_struct_function_base
        ../../gcc/lto-streamer-in.c:987
0x8443a9 input_function
        ../../gcc/lto-streamer-in.c:1061
0x8443a9 lto_read_body_or_constructor
        ../../gcc/lto-streamer-in.c:1259
0x6213f4 cgraph_node::get_untransformed_body()
        ../../gcc/cgraph.c:3620
0x62b47e cgraph_node::expand()
        ../../gcc/cgraphunit.c:2012
0x62c0c7 output_in_order
        ../../gcc/cgraphunit.c:2285
0x62c4f3 symbol_table::compile()
        ../../gcc/cgraphunit.c:2530
0x5b8ac4 lto_main()
        ../../gcc/lto/lto.c:3334
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
lto-wrapper: fatal error: gcc returned 1 exit status
compilation terminated.
/usr/bin/ld: error: lto-wrapper failed
collect2: error: ld returned 1 exit status

Attachment provides the test case.

[Bug lto/95572] lto1: internal compiler error: in lto_input_tree_ref, at lto-streamer-in.c:370

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95572

Martin Liška <marxin at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |WAITING
   Last reconfirmed|                            |2020-06-08
     Ever confirmed|0                           |1

--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Hello.
GCC 7.x is out of support, can you please test a newer release, ideally GCC
10.1 release?

[Bug lto/95572] lto1: internal compiler error: in lto_input_tree_ref, at lto-streamer-in.c:370

[sujian.liu at huawei dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95572

--- Comment #2 from sujian.liu at huawei dot com ---
(In reply to Martin Liška from comment #1)
> Hello.
> GCC 7.x is out of support, can you please test a newer release, ideally GCC
> 10.1 release?

I tried to compile with GCC 8.2.0, but no errors were reported. 
For LTO, is there a lot of changes between GCC 8.x and GCC 7.x ? What I read in
the changelog is just adding the debug infos. Did I overlook any changes of
details ?

[Bug lto/95572] lto1: internal compiler error: in lto_input_tree_ref, at lto-streamer-in.c:370

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95572

Martin Liška <marxin at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |FIXED
             Status|WAITING                     |RESOLVED

--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to liusujian from comment #2)
> (In reply to Martin Liška from comment #1)
> > Hello.
> > GCC 7.x is out of support, can you please test a newer release, ideally GCC
> > 10.1 release?
> 
> I tried to compile with GCC 8.2.0, but no errors were reported. 

Good!

> For LTO, is there a lot of changes between GCC 8.x and GCC 7.x ?

We always make a lot of changes to LTO in between releases. It's quite actively
developed area of the GCC.
> in the changelog is just adding the debug infos. Did I overlook any changes
> of details ?

Please use a supported version of the compiler.