[Bug c++/106260] New: [10/11/12/13 Regression] ICE in initialize_node_lattices, at ipa-cp.cc:1289

[Bug c++/106260] New: [10/11/12/13 Regression] ICE in initialize_node_lattices, at ipa-cp.cc:1289

[gscfq@t-online.de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106260

            Bug ID: 106260
           Summary: [10/11/12/13 Regression] ICE in
                    initialize_node_lattices, at ipa-cp.cc:1289
           Product: gcc
           Version: 13.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: gscfq@t-online.de
  Target Milestone: ---

Started with r8 and file g++.dg/lto/pr69589_1.C :


$ gcc-13-20220710 -c pr69589_1.C -O2 -fwhole-program -fno-unit-at-a-time
during IPA pass: cp
pr69589_1.C:60:1: internal compiler error: in initialize_node_lattices, at
ipa-cp.cc:1289
   60 | }
      | ^
0x1fa42bf initialize_node_lattices
        ../../gcc/ipa-cp.cc:1289
0x1facd69 ipcp_propagate_stage
        ../../gcc/ipa-cp.cc:4024
0x1facd69 ipcp_driver
        ../../gcc/ipa-cp.cc:6590

[Bug ipa/106260] [10/11/12/13 Regression] ICE in initialize_node_lattices, at ipa-cp.cc:1289 since r8-1887-g0eaf0bfe94ff5a7c

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106260

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Last reconfirmed|                            |2022-07-11
             Status|UNCONFIRMED                 |NEW
            Summary|[10/11/12/13 Regression]    |[10/11/12/13 Regression]
                   |ICE in                      |ICE in
                   |initialize_node_lattices,   |initialize_node_lattices,
                   |at ipa-cp.cc:1289           |at ipa-cp.cc:1289 since
                   |                            |r8-1887-g0eaf0bfe94ff5a7c
                 CC|                            |hubicka at gcc dot gnu.org,
                   |                            |jamborm at gcc dot gnu.org
     Ever confirmed|0                           |1

--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Started with r8-1887-g0eaf0bfe94ff5a7c.

[Bug ipa/106260] [10/11/12/13 Regression] ICE in initialize_node_lattices, at ipa-cp.cc:1289 since r8-1887-g0eaf0bfe94ff5a7c

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106260

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |10.5

[Bug ipa/106260] [10/11/12/13 Regression] ICE in initialize_node_lattices, at ipa-cp.cc:1289 since r8-1887-g0eaf0bfe94ff5a7c

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106260

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Priority|P3                          |P2

[Bug ipa/106260] [10/11/12/13 Regression] ICE in initialize_node_lattices, at ipa-cp.cc:1289 since r8-1887-g0eaf0bfe94ff5a7c

[jamborm at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106260

--- Comment #2 from Martin Jambor <jamborm at gcc dot gnu.org> ---
IPA-CP is confused by seeing a local function which does not have any caller,
it expects that all such functions would be removed as unreachable.

The assert has been somewhat useful so I'd rather keep it but perhaps it should
not trigger when there is -fno-toplevel-reorder in place?

Of course, using both -fno-toplevel-reorder and -fwhole-program is a bit
strange .

Interestingly, the manual description of -fno-toplevel-reorder only says that
"unreferenced static variables are not removed" but does not say anything about
not removing static uncalled functions.

[Bug ipa/106260] [10/11/12/13 Regression] ICE in initialize_node_lattices, at ipa-cp.cc:1289 since r8-1887-g0eaf0bfe94ff5a7c

[jamborm at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106260

--- Comment #3 from Martin Jambor <jamborm at gcc dot gnu.org> ---
I proposed a patch on the mailing list:
https://gcc.gnu.org/pipermail/gcc-patches/2022-July/598371.html

[Bug ipa/106260] [11/12/13/14 Regression] ICE in initialize_node_lattices, at ipa-cp.cc:1289 since r8-1887-g0eaf0bfe94ff5a7c

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106260

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|10.5                        |11.5

--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
GCC 10 branch is being closed.

[Bug ipa/106260] [11/12/13/14 Regression] ICE in initialize_node_lattices, at ipa-cp.cc:1289 since r8-1887-g0eaf0bfe94ff5a7c

[zsojka at seznam dot cz]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106260

--- Comment #5 from Zdenek Sojka <zsojka at seznam dot cz> ---
Created attachment 56843
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=56843&action=edit
slightly reduced testcase

$ x86_64-pc-linux-gnu-gcc -O2 -fno-unit-at-a-time -fwhole-program testcase.C
during IPA pass: cp
testcase.C:27:1: internal compiler error: in initialize_node_lattices, at
ipa-cp.cc:1593
   27 | }
      | ^
0xe60b6b initialize_node_lattices
        /repo/gcc-trunk/gcc/ipa-cp.cc:1593
0xe60b6b ipcp_propagate_stage
        /repo/gcc-trunk/gcc/ipa-cp.cc:4300
0xe60b6b ipcp_driver
        /repo/gcc-trunk/gcc/ipa-cp.cc:6700
0xe60b6b execute
        /repo/gcc-trunk/gcc/ipa-cp.cc:6775
Please submit a full bug report, with preprocessed source (by using
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See <https://gcc.gnu.org/bugs/> for instructions.