[Bug c/60515] New: Compiler crash with -g and -mpoke-function-name option combined

[eblot.ml at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60515

            Bug ID: 60515
           Summary: Compiler crash with -g and -mpoke-function-name option
                    combined
           Product: gcc
           Version: 4.9.0
            Status: UNCONFIRMED
          Severity: major
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: eblot.ml at gmail dot com

When building XZ 5.0 decoder, GCC pre-4.9.0 crashes with two distinct files
(out of a project with hundreds of files compiled with the very same command
line option).

The error is:

  $ /usr/local/opt/arm-eabi-gcc49/bin/arm-eabi-gcc-4.9.0 -mcpu=arm7tdmi-s -g 
-mpoke-function-name -o demo.o -c demo.c
  demo.c: In function ‘xz_dec_end’:
  demo.c:19:1: internal compiler error: in dwarf2out_frame_debug_adjust_cfa, at
dwarf2cfi.c:1090
   }
   ^

  demo.c:19:1: internal compiler error: Abort trap: 6
  arm-eabi-gcc-4.9.0: internal compiler error: Abort trap: 6 (program cc1)
  Abort trap: 6

GCC version:
  $ arm-eabi-gcc-4.9.0 --version
  arm-eabi-gcc-4.9.0 (SDK2-Legolas) 4.9.0 20140309 (experimental)
  Copyright (C) 2014 Free Software Foundation, Inc.
  This is free software; see the source for copying conditions.  There is NO
  warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

  Note: It is an EABI target, not the GNUEABI version.

  It has been built an executed on OS X 10.9.2, with GCC 4.8 [gcc-4.8 (GCC)
4.8.2] 
  with newlib 2.0.0 as the target libraries (./newlib and ./libgloss)
  and binutils 2.24 for the target binutils.

Configure command line:
   ../configure --prefix=${prefix}
                --target=arm-eabi
                --disable-shared
                --with-gnu-as
                --with-gnu-ld
                --with-newlib
                --enable-softfloat
                --disable-bigendian
                --disable-fpu
                --disable-underscore
                --enable-multilibs
                --with-float=soft
                --enable-interwork
                --enable-lto
                --with-multilib
                --with-abi=aapcs
                --enable-languages=c,c++
                --with-gmp=${gmp_prefix}
                --with-mpfr=${mpfr_prefix}
                --with-mpc=${libmpc_prefix}
                --with-cloog=${cloog_prefix}
                --enable-cloog-backend=isl
                --with-isl=${isl_prefix}
                --with-libelf=${libelf_prefix}
                --with-gxx-include-dir=${prefix}/arm-eabi/include
                --disable-debug
                --disable-__cxa_atexit

I've shrunk the content of the source file that triggers the bug to the minimal
possible size.

I also removed all the command line options to the simplest possible options.

demo.c:

  struct xz_dec_lzma2;
  struct xz_dec_bcj;

  struct xz_dec 
  {
      struct xz_dec_lzma2 *lzma2;
      struct xz_dec_bcj *bcj;
  };

  void xz_dec_end(struct xz_dec *s);
  void xz_dec_lzma2_end(struct xz_dec_lzma2 *s);

  void free(void * p);

  void xz_dec_end(struct xz_dec *s)
  {
      xz_dec_lzma2_end(s->lzma2);
      free(s->bcj);
  }

command line triggering the crash:

  arm-eabi-gcc-4.9.0 -mcpu=arm7tdmi-s -g -mpoke-function-name -o demo.o -c
demo.c

removing "-g" OR "-mpoke-function-name" builds the output file Ok, no crash.

Let me know if you need any other piece of information.