[Bug target/55876] New: internal compiler error: in gen_rtx_SUBREG, at emit-rtl.c:776

[vries at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55876



             Bug #: 55876

           Summary: internal compiler error: in gen_rtx_SUBREG, at

                    emit-rtl.c:776

    Classification: Unclassified

           Product: gcc

           Version: 4.8.0

            Status: UNCONFIRMED

          Severity: normal

          Priority: P3

         Component: target

        AssignedTo: unassig...@gcc.gnu.org

        ReportedBy: vr...@gcc.gnu.org





test.c:

...

static inline unsigned char

bar (const char *b)

{

   unsigned char used = 0;

   int i;



   for (i = 0; i < 4; ++i)

     if (b[i] != 'F')

       used = 1;



   return used;

}



static char buffer[8];



unsigned char

foo (void)

{

  return bar (buffer) ? 0 : 1;

}

...



...

$ ./install/bin/mips-linux-gnu-gcc -O3 test.c -S -mabi=64 -march=mips64 

test.c: In function 'foo':

test.c:19:3: internal compiler error: in gen_rtx_SUBREG, at emit-rtl.c:776

   return bar (buffer) ? 0 : 1;

   ^

0x8394d8b gen_rtx_SUBREG(machine_mode, rtx_def*, int)

        gcc/emit-rtl.c:776

0x85d7da4 widen_operand

        gcc/optabs.c:333

0x85d927d expand_binop(machine_mode, optab_tag, rtx_def*, rtx_def*, rtx_def*,

int, optab_methods)

        gcc/optabs.c:1648

0x83ce84a expand_expr_real_2(separate_ops*, rtx_def*, machine_mode,

expand_modifier)

        gcc/expr.c:9051

0x83d5d09 expand_expr_real_1(tree_node*, rtx_def*, machine_mode,

expand_modifier, rtx_def**)

        gcc/expr.c:10426

0x83d5dc8 expand_expr_real(tree_node*, rtx_def*, machine_mode, expand_modifier,

rtx_def**)

        gcc/expr.c:7848

0x83cf3f5 expand_expr_real_1(tree_node*, rtx_def*, machine_mode,

expand_modifier, rtx_def**)

        gcc/expr.c:9211

0x83d5dc8 expand_expr_real(tree_node*, rtx_def*, machine_mode, expand_modifier,

rtx_def**)

        gcc/expr.c:7848

0x86bbe63 expand_expr

        gcc/expr.h:444

0x86bf98f expand_return(tree_node*)

        gcc/stmt.c:1546

0x82d78a3 expand_gimple_stmt_1

        gcc/cfgexpand.c:2183

0x82d7e11 expand_gimple_stmt

        gcc/cfgexpand.c:2305

0x82d8f36 expand_gimple_basic_block

        gcc/cfgexpand.c:4084

0x82d9d13 gimple_expand_cfg

        gcc/cfgexpand.c:4603

Please submit a full bug report,

with preprocessed source if appropriate.

Please include the complete backtrace with any bug report.

See <http://gcc.gnu.org/bugs.html> for instructions.

...



configure line:

...

$ ./install/bin/mips-linux-gnu-gcc -v

Using built-in specs.

COLLECT_GCC=./install/bin/mips-linux-gnu-gcc

COLLECT_LTO_WRAPPER=install/bin/../libexec/gcc/mips-linux-gnu/4.8.0/lto-wrapper

Target: mips-linux-gnu

Configured with: src/gcc-mainline/configure --build=i686-pc-linux-gnu

--host=i686-pc-linux-gnu --target=mips-linux-gnu --enable-threads

--disable-libmudflap --disable-libssp --disable-libstdcxx-pch --with-gnu-as

--with-gnu-ld --enable-languages=c,c++ --enable-shared --enable-lto

--enable-symvers=gnu --enable-__cxa_atexit --disable-nls

--prefix=/opt/codesourcery --with-sysroot=/opt/codesourcery/mips-linux-gnu/libc

--with-build-sysroot=install/mips-linux-gnu/libc

--with-gmp=obj/pkg-mainline-0-mips-linux-gnu/fsf-mainline-0-mips-linux-gnu.extras/host-libs-i686-pc-linux-gnu/usr

--with-mpfr=obj/pkg-mainline-0-mips-linux-gnu/fsf-mainline-0-mips-linux-gnu.extras/host-libs-i686-pc-linux-gnu/usr

--with-mpc=obj/pkg-mainline-0-mips-linux-gnu/fsf-mainline-0-mips-linux-gnu.extras/host-libs-i686-pc-linux-gnu/usr

--with-host-libstdcxx='-static-libgcc -Wl,-Bstatic,-lstdc++,-Bdynamic -lm'

--with-isl=obj/pkg-mainline-0-mips-linux-gnu/fsf-mainline-0-mips-linux-gnu.extras/host-libs-i686-pc-linux-gnu/usr

--with-cloog=obj/pkg-mainline-0-mips-linux-gnu/fsf-mainline-0-mips-linux-gnu.extras/host-libs-i686-pc-linux-gnu/usr

--with-libelf=obj/pkg-mainline-0-mips-linux-gnu/fsf-mainline-0-mips-linux-gnu.extras/host-libs-i686-pc-linux-gnu/usr

--disable-libgomp --disable-libitm --enable-poison-system-directories

--with-build-time-tools=install/mips-linux-gnu/bin

--with-build-time-tools=install/mips-linux-gnu/bin

Thread model: posix

gcc version 4.8.0 20130104 (experimental) (GCC) 

...