[Bug c/56809] New: Revision 197266 causes trunk ICE for arm-none-eabi targets

[terry.guo at arm dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56809



             Bug #: 56809

           Summary: Revision 197266 causes trunk ICE for arm-none-eabi

                    targets

    Classification: Unclassified

           Product: gcc

           Version: 4.9.0

            Status: UNCONFIRMED

          Severity: critical

          Priority: P3

         Component: c

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

        ReportedBy: terry....@arm.com





After build a tool chain from trunk@r197266 for arm-none-eabi, then use it to

compile a simple case with switch statement, I got below ICE:



terguo01@terry-pc01:bad$ ../../install-native/bin/arm-none-eabi-gcc -O2 -S

test.c 

test.c: In function 'foo':

test.c:29:1: internal compiler error: in thumb2_output_casesi, at

config/arm/arm.c:25830

 }

 ^

0x87f9da3 thumb2_output_casesi(rtx_def**)

    /work/terguo01/build-toolchain/latest/src/gcc/gcc/config/arm/arm.c:25830

0x83265d6 final_scan_insn(rtx_def*, _IO_FILE*, int, int, int*)

    /work/terguo01/build-toolchain/latest/src/gcc/gcc/final.c:2854

0x83271c5 final(rtx_def*, _IO_FILE*, int)

    /work/terguo01/build-toolchain/latest/src/gcc/gcc/final.c:1958

0x832740a rest_of_handle_final

    /work/terguo01/build-toolchain/latest/src/gcc/gcc/final.c:4333

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.



It seems r197266 made some changes to jump table which then causes such error.



Here are the full configure options of my GCC:



terguo01@terry-pc01:bad$ ../../install-native/bin/arm-none-eabi-gcc -v

Using built-in specs.

COLLECT_GCC=../../install-native/bin/arm-none-eabi-gcc

COLLECT_LTO_WRAPPER=/work/terguo01/build-toolchain/latest/install-native/lib/gcc/arm-none-eabi/4.9.0/lto-wrapper

Target: arm-none-eabi

Configured with: /work/terguo01/build-toolchain/latest/src/gcc/configure

--target=arm-none-eabi

--prefix=/work/terguo01/build-toolchain/latest/install-native

--libexecdir=/work/terguo01/build-toolchain/latest/install-native/lib

--infodir=/work/terguo01/build-toolchain/latest/install-native/share/doc/gcc-arm-none-eabi/info

--mandir=/work/terguo01/build-toolchain/latest/install-native/share/doc/gcc-arm-none-eabi/man

--htmldir=/work/terguo01/build-toolchain/latest/install-native/share/doc/gcc-arm-none-eabi/html

--pdfdir=/work/terguo01/build-toolchain/latest/install-native/share/doc/gcc-arm-none-eabi/pdf

--enable-languages=c --disable-decimal-float --disable-libffi --disable-libgomp

--disable-libmudflap --disable-libquadmath --disable-libssp

--disable-libstdcxx-pch --disable-nls --disable-shared --disable-threads

--disable-tls --with-newlib --without-headers --with-gnu-as --with-gnu-ld

--with-python-dir=share/gcc-arm-none-eabi

--with-sysroot=/work/terguo01/build-toolchain/latest/install-native/arm-none-eabi

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

--with-pkgversion='GNU Tools for ARM Embedded Processors' --disable-multilib

--with-mode=thumb --with-cpu=cortex-m4

Thread model: single

gcc version 4.9.0 20130330 (experimental) (GNU Tools for ARM Embedded

Processors) 



Among them, the important ones are "--target=arm-none-eabi --disable-multilib

--with-mode=thumb --with-cpu=cortex-m4".



Here is my test case:

terguo01@terry-pc01:bad$ cat test.c 



int

foo (int mode, int i)

{

  int x;



  switch (mode)

    {

    case 0:

      x = i + 1;

      break;

    case 1:

      x = i / 2;

      break;

    case 2:

      x = i * 3;

      break;

    case 3:

      x = i + 3;

      break;

    case 4:

      x = i + 5;

      break;

    default:

      x = i - 1;

    }



  return x;

}