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* [Bug lto/54885] New: [4.8 Regression] lto bootstrap broken with -O3
@ 2012-10-10 9:41 markus at trippelsdorf dot de
2012-10-10 9:46 ` [Bug lto/54885] " markus at trippelsdorf dot de
` (5 more replies)
0 siblings, 6 replies; 7+ messages in thread
From: markus at trippelsdorf dot de @ 2012-10-10 9:41 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54885
Bug #: 54885
Summary: [4.8 Regression] lto bootstrap broken with -O3
Classification: Unclassified
Product: gcc
Version: 4.8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: lto
AssignedTo: unassigned@gcc.gnu.org
ReportedBy: markus@trippelsdorf.de
gcc gets apparently miscompiled in the last stage of lto/profiledbootstrap with
-O3:
Starting program: /var/tmp/gcc_build_dir/prev-gcc/xgcc
-B/var/tmp/gcc_build_dir/./gcc/ -B/usr/x86_64-pc-linux-gnu/bin/
-B/usr/x86_64-pc-linux-gnu/lib/ -isystem /usr/x86_64-pc-linux-gnu/include
-isystem /usr/x86_64-pc-linux-gnu/sys-include -march=native -O3 -pipe -O2
-march=native -O3 -pipe -DIN_GCC -W -Wall -Wno-narrowing -Wwrite-strings
-Wcast-qual -Wstrict-prototypes -Wmissing-prototypes -Wold-style-definition
-isystem ./include -fpic -mlong-double-80 -g -DIN_LIBGCC2 -fbuilding-libgcc
-fno-stack-protector -fpic -mlong-double-80 -I. -I. -I../.././gcc
-I/home/markus/gcc/libgcc -I/home/markus/gcc/libgcc/.
-I/home/markus/gcc/libgcc/../gcc -I/home/markus/gcc/libgcc/../include
-I/home/markus/gcc/libgcc/config/libbid -DENABLE_DECIMAL_BID_FORMAT
-DHAVE_CC_TLS -DUSE_TLS -o _lshrdi3.o -MT _lshrdi3.o -MD -MP -MF _lshrdi3.dep
-DL_lshrdi3 -c /home/markus/gcc/libgcc/libgcc2.c -fvisibility=hidden
-DHIDE_EXPORTS
[New process 21128]
process 21128 is executing new program: /var/tmp/gcc_build_dir/gcc/cc1
Program received signal SIGSEGV, Segmentation fault.
[Switching to process 21128]
0x0000000000667771 in execute_rtl_cprop() [clone .1175139.18174] ()
(gdb) bt
#0 0x0000000000667771 in execute_rtl_cprop() [clone .1175139.18174] ()
#1 0x00000000004eb407 in execute_one_pass(opt_pass*) ()
#2 0x00000000004eb635 in execute_pass_list(opt_pass*) ()
#3 0x00000000004eb652 in execute_pass_list(opt_pass*) ()
#4 0x00000000004c122f in expand_function(cgraph_node*) [clone .181127.59333]
()
#5 0x00000000004c2c5e in compile() ()
#6 0x00000000004c30ed in finalize_compilation_unit() ()
#7 0x0000000000509c86 in c_write_global_declarations() ()
#8 0x00000000004c3199 in compile_file() [clone .657622] ()
#9 0x00000000004ef1fc in toplev_main(int, char**) ()
#10 0x00007ffff7773635 in __libc_start_main () from /lib/libc.so.6
#11 0x00000000004b35a9 in _start () at ../sysdeps/x86_64/start.S:123
^ permalink raw reply [flat|nested] 7+ messages in thread* [Bug lto/54885] [4.8 Regression] lto bootstrap broken with -O3 2012-10-10 9:41 [Bug lto/54885] New: [4.8 Regression] lto bootstrap broken with -O3 markus at trippelsdorf dot de @ 2012-10-10 9:46 ` markus at trippelsdorf dot de 2012-10-10 9:55 ` rguenth at gcc dot gnu.org ` (4 subsequent siblings) 5 siblings, 0 replies; 7+ messages in thread From: markus at trippelsdorf dot de @ 2012-10-10 9:46 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54885 --- Comment #1 from Markus Trippelsdorf <markus at trippelsdorf dot de> 2012-10-10 09:46:01 UTC --- I've posted the wrong invocation, it should read: Starting program: /var/tmp/gcc_build_dir/gcc/xgcc (and not /var/tmp/gcc_build_dir/prev-gcc/xgcc). Anyway, the segfault is the same. ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug lto/54885] [4.8 Regression] lto bootstrap broken with -O3 2012-10-10 9:41 [Bug lto/54885] New: [4.8 Regression] lto bootstrap broken with -O3 markus at trippelsdorf dot de 2012-10-10 9:46 ` [Bug lto/54885] " markus at trippelsdorf dot de @ 2012-10-10 9:55 ` rguenth at gcc dot gnu.org 2012-10-10 9:55 ` markus at trippelsdorf dot de ` (3 subsequent siblings) 5 siblings, 0 replies; 7+ messages in thread From: rguenth at gcc dot gnu.org @ 2012-10-10 9:55 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54885 Richard Biener <rguenth at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Target Milestone|--- |4.8.0 ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug lto/54885] [4.8 Regression] lto bootstrap broken with -O3 2012-10-10 9:41 [Bug lto/54885] New: [4.8 Regression] lto bootstrap broken with -O3 markus at trippelsdorf dot de 2012-10-10 9:46 ` [Bug lto/54885] " markus at trippelsdorf dot de 2012-10-10 9:55 ` rguenth at gcc dot gnu.org @ 2012-10-10 9:55 ` markus at trippelsdorf dot de 2012-10-10 14:01 ` [Bug lto/54885] [4.8 Regression] lto/profiledbootstrap broken markus at trippelsdorf dot de ` (2 subsequent siblings) 5 siblings, 0 replies; 7+ messages in thread From: markus at trippelsdorf dot de @ 2012-10-10 9:55 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54885 --- Comment #2 from Markus Trippelsdorf <markus at trippelsdorf dot de> 2012-10-10 09:55:28 UTC --- markus@x4 libgcc % cat test.i int a; int fn1 () { if (a) return 0; } markus@x4 libgcc % /var/tmp/gcc_build_dir/./gcc/xgcc -B/var/tmp/gcc_build_dir/./gcc/ -O2 -c test.i test.i: In function ‘fn1’: test.i:7:1: internal compiler error: Segmentation fault ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug lto/54885] [4.8 Regression] lto/profiledbootstrap broken 2012-10-10 9:41 [Bug lto/54885] New: [4.8 Regression] lto bootstrap broken with -O3 markus at trippelsdorf dot de ` (2 preceding siblings ...) 2012-10-10 9:55 ` markus at trippelsdorf dot de @ 2012-10-10 14:01 ` markus at trippelsdorf dot de 2012-10-13 11:53 ` [Bug middle-end/54885] " steven at gcc dot gnu.org 2012-10-19 16:24 ` markus at trippelsdorf dot de 5 siblings, 0 replies; 7+ messages in thread From: markus at trippelsdorf dot de @ 2012-10-10 14:01 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54885 --- Comment #3 from Markus Trippelsdorf <markus at trippelsdorf dot de> 2012-10-10 14:00:53 UTC --- Configured with: markus@x4 gcc_build_dir % ~/gcc/configure --disable-werror --disable-multilib --enable-languages=c,c++ --enable-checking=release --with-build-config=slim-lto-bootstrap This succeeds: markus@x4 gcc_build_dir % make And this fails: markus@x4 gcc_build_dir % make -j4 profiledbootstrap ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug middle-end/54885] [4.8 Regression] lto/profiledbootstrap broken 2012-10-10 9:41 [Bug lto/54885] New: [4.8 Regression] lto bootstrap broken with -O3 markus at trippelsdorf dot de ` (3 preceding siblings ...) 2012-10-10 14:01 ` [Bug lto/54885] [4.8 Regression] lto/profiledbootstrap broken markus at trippelsdorf dot de @ 2012-10-13 11:53 ` steven at gcc dot gnu.org 2012-10-19 16:24 ` markus at trippelsdorf dot de 5 siblings, 0 replies; 7+ messages in thread From: steven at gcc dot gnu.org @ 2012-10-13 11:53 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54885 Steven Bosscher <steven at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Keywords| |wrong-code Status|UNCONFIRMED |NEW Last reconfirmed| |2012-10-13 Component|lto |middle-end AssignedTo|unassigned at gcc dot |steven at gcc dot gnu.org |gnu.org | Ever Confirmed|0 |1 --- Comment #4 from Steven Bosscher <steven at gcc dot gnu.org> 2012-10-13 11:53:09 UTC --- Issue is in df-problems.c's reaching-and-live definitions problem. Which is my wrong-doing. ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug middle-end/54885] [4.8 Regression] lto/profiledbootstrap broken 2012-10-10 9:41 [Bug lto/54885] New: [4.8 Regression] lto bootstrap broken with -O3 markus at trippelsdorf dot de ` (4 preceding siblings ...) 2012-10-13 11:53 ` [Bug middle-end/54885] " steven at gcc dot gnu.org @ 2012-10-19 16:24 ` markus at trippelsdorf dot de 5 siblings, 0 replies; 7+ messages in thread From: markus at trippelsdorf dot de @ 2012-10-19 16:24 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54885 Markus Trippelsdorf <markus at trippelsdorf dot de> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |RESOLVED Resolution| |FIXED --- Comment #5 from Markus Trippelsdorf <markus at trippelsdorf dot de> 2012-10-19 16:24:24 UTC --- Fixed by r192526. ^ permalink raw reply [flat|nested] 7+ messages in thread
end of thread, other threads:[~2012-10-19 16:24 UTC | newest] Thread overview: 7+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2012-10-10 9:41 [Bug lto/54885] New: [4.8 Regression] lto bootstrap broken with -O3 markus at trippelsdorf dot de 2012-10-10 9:46 ` [Bug lto/54885] " markus at trippelsdorf dot de 2012-10-10 9:55 ` rguenth at gcc dot gnu.org 2012-10-10 9:55 ` markus at trippelsdorf dot de 2012-10-10 14:01 ` [Bug lto/54885] [4.8 Regression] lto/profiledbootstrap broken markus at trippelsdorf dot de 2012-10-13 11:53 ` [Bug middle-end/54885] " steven at gcc dot gnu.org 2012-10-19 16:24 ` markus at trippelsdorf dot de
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