https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112903
Bug ID: 112903
Summary: ICE: in df_scan_verify, at df-scan.cc:4239 with -O
-fdump-rtl-pro_and_epilogue
Product: gcc
Version: 14.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: iamanonymous.cs at gmail dot com
Target Milestone: ---
*******************************************************************************
OS and Platform:
$ uname -a:
Linux ubuntu 4.15.0-213-generic #224-Ubuntu SMP Mon Jun 19 13:30:12 UTC 2023
x86_64 x86_64 x86_64 GNU/Linux
*******************************************************************************
gcc version:
$ gcc -v
Using built-in specs.
COLLECT_GCC=/root/gcc_set/202311291030/bin/gcc
COLLECT_LTO_WRAPPER=/root/gcc_set/202311291030/libexec/gcc/x86_64-pc-linux-gnu/14.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc/configure --prefix=/root/gcc_set/202311291030
--with-gmp=/root/build_essential --with-mpfr=/root/build_essential
--with-mpc=/root/build_essential --enable-languages=c,c++ --disable-multilib
--with-sanitizer=address,undefined,thread,leak
Thread model: posix
Supported LTO compression algorithms: zlib
gcc version 14.0.0 20231129 (experimental) (GCC)
git version: 99fa0bfd63d97825c4221dcd3123940f1d0e6291
*******************************************************************************
Program:
$ cat mutant.c
int __RTL (startwith ("pro_and_epilogue")) a ()
{
(function ""
(insn-chain
(block 2
(edge-from b )
(cnote 6 [bb 2] NOTE_INSN_BASIC_BLOCK)
(cjump_insn 0 (set (pc)
(if_then_else (ge (reg flags)
(const_int 0))
(label_ref 16)
(pc))) )
) (block 3
(cnote 1 [bb 3] NOTE_INSN_BASIC_BLOCK)
(cjump_insn 9 (set (pc)
(label_ref 20)) )
) (block 4
(edge-from 2)
(clabel 16 2)
(cnote 7 [bb 4] NOTE_INSN_BASIC_BLOCK)
) (block 5
(edge-from 4 (flags "FALLTHRU"))
(edge-from 3)
(clabel 20 3)
(cnote 21 [bb 5] NOTE_INSN_BASIC_BLOCK)
(edge-to exit (flags "FALLTHRU"))
) ) )
}
*******************************************************************************
Command Lines:
$ gcc -O -fdump-rtl-pro_and_epilogue mutant.c
during RTL pass: dse2
mutant.c: In function ‘a’:
mutant.c:28:1: internal compiler error: in df_scan_verify, at df-scan.cc:4239
28 | }
| ^
0x76308c df_scan_verify()
../../gcc/gcc/df-scan.cc:4239
0xb3d8f4 df_verify()
../../gcc/gcc/df-core.cc:1834
0xb3d8f4 df_analyze_1
../../gcc/gcc/df-core.cc:1221
0x1dfbc79 rest_of_handle_dse
../../gcc/gcc/dse.cc:3711
0x1dfbc79 execute
../../gcc/gcc/dse.cc:3787
Please submit a full bug report, with preprocessed source (by using
-freport-bug).
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
Also ICE on trunk, compiler explorer: https://godbolt.org/z/ooM769Yvd
