[Bug c/52855] New: ARM: Internal compiler error: in extract_insn, at recog.c:2109

[mpthompson at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52855

             Bug #: 52855
           Summary: ARM: Internal compiler error: in extract_insn, at
                    recog.c:2109
    Classification: Unclassified
           Product: gcc
           Version: 4.6.3
            Status: UNCONFIRMED
          Severity: major
          Priority: P3
         Component: c
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: mpthompson@gmail.com


Created attachment 27080
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=27080
Preprocessed *.i* file that triggers the bug.  See command line in description
to trigger bug.

Using GCC 4.6.3 on Debian armhf to create ARMv6+VFP binaries for Raspberry Pi
computer.  The compiler differs from the standard Debian Wheezy armhf as the
configured with the options: --with-arch=armv6 --with-float=hard --with-fpu=vfp

The file that triggers the error mg.c from a build of the Perl package.  Test
files and information to reproduce the error given below.

##
## GCC Version and Configurations Options 
##
## Note: --with-arch=armv6 --with-float=hard --with-fpu=vfp
##

$ gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/arm-linux-gnueabihf/4.6/lto-wrapper
Target: arm-linux-gnueabihf
Configured with: ../src/configure -v --with-pkgversion='Debian 4.6.3-1'
--with-bugurl=file:///usr/share/doc/gcc-4.6/README.Bugs
--enable-languages=c,c++,fortran,objc,obj-c++ --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-sjlj-exceptions --with-arch=armv6 --with-float=hard
--with-fpu=vfp --enable-checking=release --build=arm-linux-gnueabihf
--host=arm-linux-gnueabihf --target=arm-linux-gnueabihf
Thread model: posix
gcc version 4.6.3 (Debian 4.6.3-1)

##
## System Type and Information
##

Debian Wheezy armhf (hard float) install.

$ uname -a
Linux armor.home.lan 2.6.35.3-mx5 #1 PREEMPT Wed Mar 28 04:03:29 PDT 2012
armv7l GNU/Linux

$ cat /proc/cpuinfo
Processor       : ARMv7 Processor rev 5 (v7l)
BogoMIPS        : 999.42
Features        : swp half thumb fastmult vfp edsp neon vfpv3
CPU implementer : 0x41
CPU architecture: 7
CPU variant     : 0x2
CPU part        : 0xc08
CPU revision    : 5
Hardware        : Freescale MX53 LOCO Board
Revision        : 53321
Serial          : 0000000000000000

##
## Command Line To Reproduce Bug
##

gcc -DPERL_CORE -c -D_REENTRANT -D_GNU_SOURCE -DDEBIAN -D_FORTIFY_SOURCE=2 -g
-O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Wformat-security
-Werror=format-security -fno-strict-aliasing -pipe -I/usr/local/include
-D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64   -O2 -g -Wall   -W -Wextra
-Wdeclaration-after-statement -Wendif-labels -Wc++-compat -Wwrite-strings -o
cccPDUUP.o cccPDUUP.i

##
## Compiler Error Messages
##

mg.c: In function ‘Perl_magic_get’:
mg.c:1168:1: error: unrecognizable insn:
(insn 1708 1707 1709 69 (set (reg:SI 2 r2)
        (sign_extend:SI (mem/s/j:QI (plus:SI (reg:SI 0 r0)
                    (const_int 1681 [0x691])) [0 my_perl_54(D)->Iutf8cache+0 S1
A8]))) mg.c:967 -1
     (nil))
mg.c:1168:1: internal compiler error: in extract_insn, at recog.c:2109
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/ccsQAOCv.out file, please attach this to
your bugreport.
$