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From: "dcb314 at hotmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/106862] New: ice in compute_control_dep_chain, at
 gimple-predicate-analysis.cc:1105
Date: Tue, 06 Sep 2022 17:35:08 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D106862

            Bug ID: 106862
           Summary: ice in compute_control_dep_chain, at
                    gimple-predicate-analysis.cc:1105
           Product: gcc
           Version: 12.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: dcb314 at hotmail dot com
  Target Milestone: ---

Created attachment 53545
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=3D53545&action=3Dedit
gzipped C++ source code

For the attached C++ code, recent g++ does this:

$ /home/dcb/gcc/results/bin/g++ -c -g -O1 -Wall -fpermissive bug842.cc
during GIMPLE pass: uninit
In file included from VSLRead.C:113:
y.tab.c: In function =E2=80=98int VSLLib_parse()=E2=80=99:
y.tab.c:1497:1: internal compiler error: in compute_control_dep_chain, at
gimple-predicate-analysis.cc:1105
0x1df8e69 compute_control_dep_chain(basic_block_def*, basic_block_def const=
*,
vec<edge_def*, va_heap, vl_ptr>*, uns
igned int*, vec<edge_def*, va_heap, vl_ptr>&, unsigned int*, unsigned int,
unsigned int)
        ../../trunk.git/gcc/gimple-predicate-analysis.cc:1105
0x1df8ae7 compute_control_dep_chain(basic_block_def*, basic_block_def const=
*,
vec<edge_def*, va_heap, vl_ptr>*, uns
igned int*, vec<edge_def*, va_heap, vl_ptr>&, unsigned int*, unsigned int,
unsigned int)
        ../../trunk.git/gcc/gimple-predicate-analysis.cc:1086
0x1df8ae7 compute_control_dep_chain(basic_block_def*, basic_block_def const=
*,
vec<edge_def*, va_heap, vl_ptr>*, uns
igned int*, vec<edge_def*, va_heap, vl_ptr>&, unsigned int*, unsigned int,
unsigned int)
        ../../trunk.git/gcc/gimple-predicate-analysis.cc:1086
0x1df7895 compute_control_dep_chain(basic_block_def*, basic_block_def const=
*,
vec<edge_def*, va_heap, vl_ptr>*, uns
igned int*, unsigned int)
        ../../trunk.git/gcc/gimple-predicate-analysis.cc:1120

The bug first seems to occur sometime between git hash 5e070cf4bd085e10,
from yesterday, and d6582c662ca0da05, from today.=