ICE on -O2 when using clang {3.7|3.5|3.4} from debian

[Quuxplusone]

Bugzilla Link	PR23210
Status	NEW
Importance	P normal
Reported by	Marcelo Juchem (juchem@gmail.com)
Reported on	2015-04-13 03:09:55 -0700
Last modified on	2015-12-29 16:20:41 -0800
Version	3.5
Hardware	PC Linux
CC	llvm-bugs@lists.llvm.org
Fixed by commit(s)
Attachments	ephemeral_rope_test-2c2816.cpp.gz (659532 bytes, application/gzip) rope_test-ac7211.tar.xz (506216 bytes, application/x-xz)
Blocks
Blocked by
See also

-O0 compiles fine

clang c.4 and 3.5 also crash when optimizations are on

repro:
$ clang++-3.7 -O2 -std=c++11 /tmp/ephemeral_rope_test-2c2816.cpp

output:
Debian clang version 3.7.0-svn230892-1 (trunk) (based on LLVM 3.7.0)
Target: x86_64-pc-linux-gnu
Thread model: posix
Found candidate GCC installation: /usr/bin/../lib/gcc/i586-linux-gnu/4.9
Found candidate GCC installation: /usr/bin/../lib/gcc/i586-linux-gnu/4.9.2
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/4.8
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/4.8.4
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/4.9
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/4.9.2
Found candidate GCC installation: /usr/lib/gcc/i586-linux-gnu/4.9
Found candidate GCC installation: /usr/lib/gcc/i586-linux-gnu/4.9.2
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.8
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.8.4
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.9
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.9.2
Selected GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/4.9
Candidate multilib: .;@m64
Candidate multilib: 32;@m32
Candidate multilib: x32;@mx32
Selected multilib: .;@m64
 "/usr/lib/llvm-3.7/bin/clang" -cc1 -triple x86_64-pc-linux-gnu -emit-obj -disable-free -disable-llvm-verifier -main-file-name ephemeral_rope_test.cpp -mrelocation-model static -mthread-model posix -fmath-errno -masm-verbose -mconstructor-aliases -munwind-tables -fuse-init-array -target-cpu x86-64 -target-linker-version 2.25 -momit-leaf-frame-pointer -v -g -dwarf-column-info -resource-dir /usr/lib/llvm-3.7/bin/../lib/clang/3.7.0 -D FATAL_USE_CXXABI -I . -internal-isystem /usr/bin/../lib/gcc/x86_64-linux-gnu/4.9/../../../../include/c++/4.9 -internal-isystem /usr/bin/../lib/gcc/x86_64-linux-gnu/4.9/../../../../include/x86_64-linux-gnu/c++/4.9 -internal-isystem /usr/bin/../lib/gcc/x86_64-linux-gnu/4.9/../../../../include/x86_64-linux-gnu/c++/4.9 -internal-isystem /usr/bin/../lib/gcc/x86_64-linux-gnu/4.9/../../../../include/c++/4.9/backward -internal-isystem /usr/local/include -internal-isystem /usr/lib/llvm-3.7/bin/../lib/clang/3.7.0/include -internal-externc-isystem /usr/bin/../lib/gcc/x86_64-linux-gnu/4.9/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -O2 -Wall -Werror -std=c++11 -fdeprecated-macro -fdebug-compilation-dir /home/marcelo/src/fatal -ferror-limit 19 -fmessage-length 0 -pthread -mstackrealign -fobjc-runtime=gcc -fcxx-exceptions -fexceptions -fdiagnostics-show-option -vectorize-loops -vectorize-slp -o /tmp/ephemeral_rope_test-8a4927.o -x c++ fatal/string/test/ephemeral_rope_test.cpp
clang -cc1 version 3.7.0 based upon LLVM 3.7.0 default target x86_64-pc-linux-
gnu
ignoring nonexistent directory "/include"
ignoring duplicate directory "/usr/bin/../lib/gcc/x86_64-linux-
gnu/4.9/../../../../include/x86_64-linux-gnu/c++/4.9"
#include "..." search starts here:
#include <...> search starts here:
 .
 /usr/bin/../lib/gcc/x86_64-linux-gnu/4.9/../../../../include/c++/4.9
 /usr/bin/../lib/gcc/x86_64-linux-gnu/4.9/../../../../include/x86_64-linux-gnu/c++/4.9
 /usr/bin/../lib/gcc/x86_64-linux-gnu/4.9/../../../../include/c++/4.9/backward
 /usr/local/include
 /usr/lib/llvm-3.7/bin/../lib/clang/3.7.0/include
 /usr/bin/../lib/gcc/x86_64-linux-gnu/4.9/include
 /usr/include/x86_64-linux-gnu
 /usr/include
End of search list.
clang: error: unable to execute command: Killed
clang: error: clang frontend command failed due to signal (use -v to see
invocation)
Debian clang version 3.7.0-svn230892-1 (trunk) (based on LLVM 3.7.0)
Target: x86_64-pc-linux-gnu
Thread model: posix

[Quuxplusone]

Attached ephemeral_rope_test-2c2816.cpp.gz (659532 bytes, application/gzip): preprocessed file

[Quuxplusone]

Attached rope_test-ac7211.tar.xz (506216 bytes, application/x-xz): preprocessed file from clang 3.8

[Quuxplusone]

still reproduces with trunk (clang 3.8 from Debian's official sid repo):

+ clang++-3.8 -o /tmp/_build/clang++-3.8/c++1z/fatal/string/test/rope_test -O2 -
g -pthread -Wall -Werror -std=c++1z -I . fatal/string/test/rope_test.cpp
clang: error: unable to execute command: Killed
clang: error: clang frontend command failed due to signal (use -v to see
invocation)
Debian clang version 3.8.0-svn254193-1 (trunk) (based on LLVM 3.8.0)
Target: x86_64-pc-linux-gnu
Thread model: posix
InstalledDir: /usr/bin
clang: note: diagnostic msg: PLEASE submit a bug report to
http://bugs.debian.org/ and include the crash backtrace, preprocessed source,
and associated run script.
clang: note: diagnostic msg:
********************

PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
clang: note: diagnostic msg: /tmp/rope_test-ac7211.cpp
clang: note: diagnostic msg: /tmp/rope_test-ac7211.sh
clang: note: diagnostic msg:

********************