[Bug c/52587] New: ICE: in emit_move_insn, at expr.c:3355: array with one element

[Bug c/52587] New: ICE: in emit_move_insn, at expr.c:3355: array with one element

[dmagagnosc at yahoo dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52587

             Bug #: 52587
           Summary: ICE: in emit_move_insn, at expr.c:3355: array with one
                    element
    Classification: Unclassified
           Product: gcc
           Version: 4.6.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: dmagagnosc@yahoo.com


Created attachment 26891
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=26891
Preprocessed source file

Using built-in specs.
COLLECT_GCC=gcc-4.6
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/4.6.1/lto-wrapper
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu/Linaro
4.6.1-9ubuntu3' --with-bugurl=file:///usr/share/doc/gcc-4.6/README.Bugs
--enable-languages=c,c++,fortran,objc,obj-c++,go --prefix=/usr
--program-suffix=-4.6 --enable-shared --enable-linker-build-id
--with-system-zlib --libexecdir=/usr/lib --without-included-gettext
--enable-threads=posix --with-gxx-include-dir=/usr/include/c++/4.6
--libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu
--enable-libstdcxx-debug --enable-libstdcxx-time=yes --enable-plugin
--enable-objc-gc --disable-werror --with-arch-32=i686 --with-tune=generic
--enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu
--target=x86_64-linux-gnu
Thread model: posix
gcc version 4.6.1 (Ubuntu/Linaro 4.6.1-9ubuntu3) 
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-c' '-g3' '-O3' '-fno-strict-aliasing'
'-o' 'ICE.o' '-mtune=generic' '-march=x86-64'
 /usr/lib/gcc/x86_64-linux-gnu/4.6.1/cc1 -E -quiet -v -imultilib . -imultiarch
x86_64-linux-gnu -dD ICE.c -mtune=generic -march=x86-64 -fno-strict-aliasing
-g3 -fworking-directory -O3 -fpch-preprocess -fstack-protector -o ICE.i
ignoring nonexistent directory "/usr/local/include/x86_64-linux-gnu"
ignoring nonexistent directory
"/usr/lib/gcc/x86_64-linux-gnu/4.6.1/../../../../x86_64-linux-gnu/include"
#include "..." search starts here:
#include <...> search starts here:
 /usr/lib/gcc/x86_64-linux-gnu/4.6.1/include
 /usr/local/include
 /usr/lib/gcc/x86_64-linux-gnu/4.6.1/include-fixed
 /usr/include/x86_64-linux-gnu
 /usr/include
End of search list.
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-c' '-g3' '-O3' '-fno-strict-aliasing'
'-o' 'ICE.o' '-mtune=generic' '-march=x86-64'
 /usr/lib/gcc/x86_64-linux-gnu/4.6.1/cc1 -fpreprocessed ICE.i -quiet -dumpbase
ICE.c -mtune=generic -march=x86-64 -auxbase-strip ICE.o -g3 -O3 -version
-fno-strict-aliasing -fstack-protector -o ICE.s
GNU C (Ubuntu/Linaro 4.6.1-9ubuntu3) version 4.6.1 (x86_64-linux-gnu)
        compiled by GNU C version 4.6.1, GMP version 5.0.1, MPFR version
3.0.1-p3, MPC version 0.9
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
GNU C (Ubuntu/Linaro 4.6.1-9ubuntu3) version 4.6.1 (x86_64-linux-gnu)
        compiled by GNU C version 4.6.1, GMP version 5.0.1, MPFR version
3.0.1-p3, MPC version 0.9
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: 5dede901e38d49932d3155c3e888bca1
ICE.c: In function ‘func3’:
ICE.c:36:19: internal compiler error: in emit_move_insn, at expr.c:3355
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-4.6/README.Bugs> for instructions.
Preprocessed source stored into /tmp/ccbwMOGo.out file, please attach this to
your bugreport.


Notes:
1) No ICE with -O1.
2) Changing n_elts to 2 avoids the ICE.
3) Compiles correctly with GCC 4.4.6.

[Bug middle-end/52587] using out of bounds of an array with size of one

[pinskia at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52587

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> 2012-03-15 09:01:35 UTC ---
This works correctly with "4.8.0 20120313" and "4.7.0 20120212".

[Bug middle-end/52587] using out of bounds of an array with size of one

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52587

Marek Polacek <mpolacek at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
                 CC|                            |mpolacek at gcc dot gnu.org
         Resolution|---                         |FIXED

--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
So should be fixed now.