https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92767
Bug ID: 92767
Summary: [m68k]: Random ICE: verify_flow_info failed
Product: gcc
Version: 10.0
URL: https://buildd.debian.org/status/fetch.php?pkg=gcc-sna
pshot&arch=m68k&ver=1%3A20191130-1&stamp=1575330554&ra
w=0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: glaubitz at physik dot fu-berlin.de
CC: bernds at gcc dot gnu.org, schwab at gcc dot gnu.org
Target Milestone: ---
Target: m68k-*-*
Trying a full bootstrap with gm2 enabled on m68k, the build fails with an
internal compiler error:
GCC_FOR_TARGET /<<PKGBUILDDIR>>/build/./gcc/xgcc
-B/<<PKGBUILDDIR>>/build/./gcc/
bash ../../src/gcc/m2/tools-src/makeSystem -fpim \
../../src/gcc/m2/gm2-libs/SYSTEM.def \
../../src/gcc/m2/gm2-libs/SYSTEM.mod \
-I../../src/gcc/m2/gm2-libs \
"/<<PKGBUILDDIR>>/build/./gcc/xgm2
-B/<<PKGBUILDDIR>>/build/./gcc/"
/<<PKGBUILDDIR>>/build/gcc/m2/gm2-libs/SYSTEM.def
../../src/gcc/m2/gm2-libs/SYSTEM.mod: In function 'ShiftVal':
../../src/gcc/m2/gm2-libs/SYSTEM.mod:89:1: error: verify_flow_info: Wrong count
of block 23
89 | END ShiftVal ;
| ^~~
../../src/gcc/m2/gm2-libs/SYSTEM.mod:89:1: error: verify_flow_info: Wrong count
of block 22
during RTL pass: outof_cfglayout
../../src/gcc/m2/gm2-libs/SYSTEM.mod:89:1: internal compiler error:
verify_flow_info failed
mmap: Permission denied
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-snapshot/README.Bugs> for instructions.
But even with gm2 disabled, the issue shows at other places:
../../../src/libgomp/target.c: In function 'gomp_map_vars':
../../../src/libgomp/target.c:1052:1: error: verify_flow_info: Wrong count of
block 110
1052 | }
| ^
../../../src/libgomp/target.c:1052:1: error: verify_flow_info: Wrong count of
block 42
during RTL pass: expand
../../../src/libgomp/target.c:1052:1: internal compiler error: verify_flow_info
failed
mmap: Permission denied
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-snapshot/README.Bugs> for instructions.
From:
https://buildd.debian.org/status/fetch.php?pkg=gcc-snapshot&arch=m68k&ver=1%3A20190719-1&stamp=1563578948&raw=0
It seems the issue was introduced between r271016 and r271670 when comparing
the Debian builds at:
> https://buildd.debian.org/status/logs.php?pkg=gcc-snapshot&arch=m68k
Last successful build with snapshot version (20190508, r271016) and first
unsuccessful build with snapshot version (20190527, r271670).
The issue is older than the MODE_CC conversion recently performed on the m68k
backend.
I will perform some more testing to find out whether this issue might be
Debian-specific.
