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Re: [creduce-bugs] oscillation in creducing



Hi Yang,

I reproduce it and now have both variants -- 6965 / 6975 bytes. Attached.

Thanks,
Dmitry

чт, 18 апр. 2019 г. в 12:37, Дмитрий Дьяченко <dimhen@gmail.com>:
>
> Hi Yang,
> I compile creduce by gcc-8 from Fedora distro, not by clang-7
>
> Dmitry
>
> $ gcc -v
> Using built-in specs.
> COLLECT_GCC=/usr/bin/gcc
> COLLECT_LTO_WRAPPER=/usr/libexec/gcc/x86_64-redhat-linux/8/lto-wrapper
> OFFLOAD_TARGET_NAMES=nvptx-none
> OFFLOAD_TARGET_DEFAULT=1
> Target: x86_64-redhat-linux
> Configured with: ../configure --enable-bootstrap
> --enable-languages=c,c++,fortran,objc,obj-c++,ada,go,lto --prefix=/usr
> --mandir=/usr/share/man --infodir=/usr/share/info
> --with-bugurl=http://bugzilla.redhat.com/bugzilla --enable-shared
> --enable-threads=posix --enable-checking=release --enable-multilib
> --with-system-zlib --enable-__cxa_atexit
> --disable-libunwind-exceptions --enable-gnu-unique-object
> --enable-linker-build-id --with-gcc-major-version-only
> --with-linker-hash-style=gnu --enable-plugin --enable-initfini-array
> --with-isl --enable-libmpx --enable-offload-targets=nvptx-none
> --without-cuda-driver --enable-gnu-indirect-function --enable-cet
> --with-tune=generic --with-arch_32=i686 --build=x86_64-redhat-linux
> Thread model: posix
> gcc version 8.3.1 20190223 (Red Hat 8.3.1-2) (GCC)
>
> чт, 18 апр. 2019 г. в 11:36, Yang Chen <chenyang@cs.utah.edu>:
> >
> > Hi Dmitry,
> >
> > It looks like the erroneous behavior was triggered by some bad
> > transformation in copy propagation pass. If possible, could you send us
> > the "best" reduced file after you hit Ctrl-C? Probably I could reproduce
> > the behavior locally. Thanks!
> >
> > - Yang
> >
> >
> > On 4/18/19 1:02 AM, Дмитрий Дьяченко wrote:
> > > Hi!
> > >
> > > I hit a strange situation -- creducing start "oscillate" at some point
> > > -- end of log follow.
> > >
> > > May be due inconsistency? -- from script I return `100' at some
> > > situation (gcc ICE), but run creduce w/o `--also-interesting 100'
> > >
> > > After ^C and restarting, reduction continues as usual w/o "oscillations".
> > >
> > > Do you have a suggestion how I can bugreport it?
> > > And 'll it be helpful to bugreport?
> > >
> > > Thanks,
> > > Dmitry
> > >
> > > Fedora 29 x86_64
> > > creduce/master compiled from sources,
> > > clang-7.0.1 from Fedora 29 distro
> > >
> > >
> > > creduce --sllooww --n 3 .. ...
> > > [...]
> > > (98.9 %, 6075 bytes)
> > > (98.9 %, 5985 bytes)
> > > ===< pass_clang :: aggregate-to-scalar >===
> > > ===< pass_clang :: param-to-global >===
> > > (98.9 %, 5942 bytes)
> > > (98.9 %, 5916 bytes)
> > > (98.9 %, 5973 bytes)
> > > (98.9 %, 6016 bytes)
> > > (98.9 %, 5998 bytes)
> > > shell-init: error retrieving current directory: getcwd: cannot access
> > > parent directories: No such file or directory
> > > (98.9 %, 5974 bytes)
> > > (98.9 %, 5962 bytes)
> > > (98.9 %, 5992 bytes)
> > > (98.9 %, 6018 bytes)
> > > (98.9 %, 6073 bytes)
> > > ===< pass_clang :: param-to-local >===
> > > (98.9 %, 6091 bytes)
> > > ===< pass_clang :: remove-nested-function >===
> > > (98.8 %, 6135 bytes)
> > > (98.8 %, 6189 bytes)
> > > ===< pass_clang :: union-to-struct >===
> > > ===< pass_clang :: return-void >===
> > > (98.8 %, 6181 bytes)
> > > (98.8 %, 6181 bytes)
> > > ===< pass_clang :: simple-inliner >===
> > > (98.8 %, 6148 bytes)
> > > (98.8 %, 6209 bytes)
> > > (98.8 %, 6318 bytes)
> > > (98.8 %, 6652 bytes)
> > > (98.7 %, 6685 bytes)
> > > (98.7 %, 6965 bytes)
> > > ===< pass_clang :: reduce-pointer-level >===
> > > clang_delta: ReducePointerLevel.cpp:877: void
> > > ReducePointerLevel::getNewLocalInitStr(const clang::Expr*,
> > > std::__cxx11::string&): Assertion `0 && "Uncaught initializer!"'
> > > failed.
> > > sh: line 1: 31078 Aborted                 (core dumped)
> > > "/usr/local/creduce/libexec/clang_delta"
> > > --transformation=reduce-pointer-level --counter=1
> > > /tmp/creduce-u2bwLK/a.ii > /tmp/97sto66S0m
> > >
> > > ***************************************************
> > >
> > > pass_clang::reduce-pointer-level has encountered a bug:
> > > crashed: "/usr/local/creduce/libexec/clang_delta"
> > > --transformation=reduce-pointer-level --counter=1
> > > /tmp/creduce-u2bwLK/a.ii
> > >
> > > Please consider tarring up /home/dimhen/errs/gcc9/x2/creduce_bug_000
> > > and mailing it to creduce-bugs@flux.utah.edu and we will try to fix
> > > the bug.
> > >
> > > This bug is not fatal, C-Reduce will continue to execute.
> > >
> > > ***************************************************
> > >
> > > ===< pass_clang :: lift-assignment-expr >===
> > > ===< pass_clang :: copy-propagation >===
> > > (98.7 %, 6975 bytes)
> > > (98.7 %, 6965 bytes)
> > > (98.7 %, 6975 bytes)
> > > shell-init: error retrieving current directory: getcwd: cannot access
> > > parent directories: No such file or directory
> > > (98.7 %, 6965 bytes)
> > > (98.7 %, 6975 bytes)
> > > (98.7 %, 6965 bytes)
> > > (98.7 %, 6975 bytes)
> > > [...]
> > >
> > > ... I terminate it by pressing ^C after 10-15 minutes seeing 6965 / 6975 lines

Attachment: oscillate_6965.ii
Description: Binary data

Attachment: oscillate_6975.ii
Description: Binary data