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Message #09770
[Bug 1227789] Re: ICE while nbench-2.2.3 compilation with -floop-parallelize-all
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------------------------------------------------------------------------
On 2014-08-12T20:26:53+00:00 Drfiemost wrote:
Created attachment 33305
Preprocessed source
gcc -O2 -floop-parallelize-all -ffast-math -c cvt.i
cvt.c: In function ‘Pobsopen’:
cvt.c:62:12: internal compiler error: Segmentation fault
Reproduced with both 4.8 and 4.9:
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/libexec/gcc/x86_64-unknown-linux-gnu/4.8.4/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: ../gcc-4.8-20140807/configure --prefix=/usr --enable-shared --disable-static --disable-dependency-tracking --enable-languages=c,c++ --disable-multilib --with-system-zlib --disable-bootstrap
Thread model: posix
gcc version 4.8.4 20140807 (prerelease) (GCC)
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/libexec/gcc/x86_64-unknown-linux-gnu/4.9.1/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: ../gcc-4.9.1/configure --prefix=/usr --enable-shared --enable-threads=posix --enable-__cxa_atexit --enable-clocale=gnu --enable-languages=c,c++ --disable-multilib --disable-bootstrap --with-system-zlib --disable-static --disable-dependency-tracking
Thread model: posix
gcc version 4.9.1 (GCC)
Reply at:
https://bugs.launchpad.net/ubuntu/+source/gcc-4.8/+bug/1227789/comments/2
------------------------------------------------------------------------
On 2014-08-14T07:39:04+00:00 Drfiemost wrote:
Backtrace generated with gcc version 4.9.2 20140813 (prerelease)
# LANG=C gcc/cc1 -O2 -floop-parallelize-all -ffast-math /mnt/doc/cvt.i
vprintf getchar fgetc_unlocked getc_unlocked getchar_unlocked putchar fputc_unlocked putc_unlocked putchar_unlocked feof_unlocked ferror_unlocked __signbitf __signbit __signbitl lgamma lgammaf lgammal gamma gammaf gammal tgamma tgammaf tgammal __bswap_32 __bswap_64 atoi atol atoll gnu_dev_major gnu_dev_minor gnu_dev_makedev bsearch atof mymalloc Pobsopen Pobsclose Pobspath Pobsbarriers addpt Bezier append_bezier
Analyzing compilation unit
Performing interprocedural optimizations
<*free_lang_data> <visibility> <early_local_cleanups> <*free_inline_summary> <whole-program> <profile_estimate> <devirt> <cp> <inline> <pure-const> <static-var>Assembling functions:
Pobsopen
cvt.c: In function 'Pobsopen':
cvt.c:62:12: internal compiler error: Segmentation fault
0xb2a43e crash_signal
../../gcc-4.9-20140813/gcc/toplev.c:337
0x7f12fad2098f ???
/usr/src/glibc/glibc-2.19/signal/../sysdeps/unix/sysv/linux/x86_64/sigaction.c:0
0x1201529 subtract_commutative_associative_deps
../../gcc-4.9-20140813/gcc/graphite-dependences.c:430
0x1201927 compute_deps(scop*, vec<poly_bb*, va_heap, vl_ptr>, isl_union_map**, isl_union_map**, isl_union_map**, isl_union_map**, isl_union_map**, isl_union_map**, isl_union_map**, isl_union_map**, isl_union_map**, isl_union_map**, isl_union_map**, isl_union_map**)
../../gcc-4.9-20140813/gcc/graphite-dependences.c:502
0x1201b99 loop_level_carries_dependences
../../gcc-4.9-20140813/gcc/graphite-dependences.c:566
0x1201d07 loop_is_parallel_p(loop*, hash_table<bb_pbb_hasher, xcallocator>, int)
../../gcc-4.9-20140813/gcc/graphite-dependences.c:598
0x11fe45d translate_clast_for_loop
../../gcc-4.9-20140813/gcc/graphite-clast-to-gimple.c:1200
0x11fe512 translate_clast_for
../../gcc-4.9-20140813/gcc/graphite-clast-to-gimple.c:1224
0x11fe792 translate_clast
../../gcc-4.9-20140813/gcc/graphite-clast-to-gimple.c:1307
0x11fe886 translate_clast
../../gcc-4.9-20140813/gcc/graphite-clast-to-gimple.c:1327
0x11ff3b6 gloog(scop*, hash_table<bb_pbb_hasher, xcallocator>)
../../gcc-4.9-20140813/gcc/graphite-clast-to-gimple.c:1712
0x11fb371 graphite_transform_loops()
../../gcc-4.9-20140813/gcc/graphite.c:304
0x11fb406 graphite_transforms
../../gcc-4.9-20140813/gcc/graphite.c:332
0x11fb534 execute
../../gcc-4.9-20140813/gcc/graphite.c:416
Reply at:
https://bugs.launchpad.net/ubuntu/+source/gcc-4.8/+bug/1227789/comments/3
------------------------------------------------------------------------
On 2014-08-14T08:33:18+00:00 Ktkachov wrote:
Created attachment 33317
Reduced testcase
Confirmed, attaching reduced testcase
Reply at:
https://bugs.launchpad.net/ubuntu/+source/gcc-4.8/+bug/1227789/comments/4
------------------------------------------------------------------------
On 2014-08-14T08:34:59+00:00 Ktkachov wrote:
Confirmed on aarch64 4.9.1, trunk works, didn't try 4.8 though
Reply at:
https://bugs.launchpad.net/ubuntu/+source/gcc-4.8/+bug/1227789/comments/5
------------------------------------------------------------------------
On 2014-08-15T09:26:08+00:00 Doko-v wrote:
this test case fails on the 4.8 and 4.9 branches, but succeeds with
trunk 20140815.
$ cat tst.c
int a, b;
fn1() {
for (; a; a++)
b |= 1;
}
$ gcc -c -Ofast -floop-parallelize-all tst.c tst.c: In function 'fn1':
tst.c:2:1: internal compiler error: Segmentation fault
fn1() {
^
Please submit a full bug report,
with preprocessed source if appropriate.
(gdb) bt
#0 0x0000000000cdf3ea in compute_deps(scop*, vec<poly_bb*, va_heap, vl_ptr>, isl_union_map**, isl_union_map**, isl_union_map**, isl_union_map**, isl_union_map**, isl_union_map**, isl_union_map**, isl_union_map**, isl_union_map**, isl_union_map**, isl_union_map**, isl_union_map**) ()
#1 0x0000000000cdf913 in loop_is_parallel_p(loop*, hash_table<bb_pbb_hasher, xcallocator>, int)
()
#2 0x0000000000cdd9fd in ?? ()
#3 0x0000000000cddd72 in gloog(scop*, hash_table<bb_pbb_hasher, xcallocator>) ()
#4 0x0000000000cdac09 in graphite_transform_loops() ()
#5 0x0000000000cdb0f7 in ?? ()
#6 0x0000000000818b3b in execute_one_pass(opt_pass*) ()
#7 0x0000000000818dd6 in execute_pass_list(opt_pass*) ()
#8 0x0000000000818de8 in execute_pass_list(opt_pass*) ()
#9 0x0000000000818de8 in execute_pass_list(opt_pass*) ()
#10 0x0000000000818de8 in execute_pass_list(opt_pass*) ()
#11 0x000000000063f656 in ?? ()
#12 0x0000000000640f4d in compile() ()
#13 0x00000000006413a5 in finalize_compilation_unit() ()
#14 0x00000000005648ec in c_write_global_declarations() ()
#15 0x00000000008b353d in ?? ()
#16 0x00000000008b50d0 in toplev_main(int, char**) ()
#17 0x00007ffff66e7b45 in __libc_start_main (main=0x552750 <main>, argc=18,
argv=0x7fffffffe588, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>,
stack_end=0x7fffffffe578) at libc-start.c:287
#18 0x000000000055297f in _start ()
Reply at:
https://bugs.launchpad.net/ubuntu/+source/gcc-4.8/+bug/1227789/comments/6
** Changed in: gcc
Status: Unknown => Confirmed
** Changed in: gcc
Importance: Unknown => Medium
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https://bugs.launchpad.net/bugs/1227789
Title:
ICE while nbench-2.2.3 compilation with -floop-parallelize-all
Status in The GNU Compiler Collection:
Confirmed
Status in “gcc-4.8” package in Ubuntu:
Confirmed
Status in “gcc-4.9” package in Ubuntu:
Confirmed
Status in “gcc-snapshot” package in Ubuntu:
Fix Released
Bug description:
nbench source code: http://www.tux.org/~mayer/linux/bmark.html
CFLAGS = -s -static -Wall
CFLAGS += -Ofast -flto -fstrict-aliasing -fomit-frame-pointer
-freciprocal-math -march=native -mrecip=all -freorder-blocks-and-
partition
CFLAGS += -floop-nest-optimize -floop-parallelize-all -fgraphite-identity \
-floop-interchange -funroll-loops
ProblemType: Crash
DistroRelease: Ubuntu 13.10
Package: cpp-4.8 4.8.1-10ubuntu3
ProcVersionSignature: Ubuntu 3.11.0-7.14-generic 3.11.1
Uname: Linux 3.11.0-7-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.12.2-0ubuntu1
Architecture: amd64
Date: Thu Sep 19 20:48:31 2013
ExecutablePath: /usr/lib/gcc/x86_64-linux-gnu/4.8/cc1
InstallationDate: Installed on 2013-06-08 (103 days ago)
InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release amd64 (20130424)
MarkForUpload: True
SourcePackage: gcc-4.8
UpgradeStatus: Upgraded to saucy on 2013-08-10 (40 days ago)
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