[Bug target/55659] [4.8 Regression] [SH] Build failure with ICE in dwarf2out_var_location, at dwarf2out.c:20748

["kkojima at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55659

--- Comment #2 from Kazumoto Kojima <kkojima at gcc dot gnu.org> 2012-12-12 07:34:20 UTC ---
(In reply to comment #1)
> Please provide preprocessed testcase and gcc options, so that this can be
> looked at from a cross-compiler.
> Very likely md reorg pass does something wrong.

A reduced testcase for -g -O2 is

void
foo (void)
{
  bar ();
}

I've got a similar failure for the unified arm-elf build:

/home/kkojima/kaz/xarm-eabi-combined/combined/libgcc/libgcc2.c: In function
'__eprintf':
/home/kkojima/kaz/xarm-eabi-combined/combined/libgcc/libgcc2.c:2054:1: internal
compiler error: in dwarf2out_var_location, at dwarf2out.c:20748
 }
 ^
0x82a0dba dwarf2out_var_location
    /home/kkojima/kaz/xarm-eabi-combined/combined/gcc/dwarf2out.c:20744
0x82a0dba dwarf2out_var_location
    /home/kkojima/kaz/xarm-eabi-combined/combined/gcc/dwarf2out.c:20632
0x831eb1b final_scan_insn(rtx_def*, _IO_FILE*, int, int, int*)
    /home/kkojima/kaz/xarm-eabi-combined/combined/gcc/final.c:2215

A reduced testcase for arm-elf with -g -O2 might be more handy:

--
struct _on_exit_args { };
typedef struct __sFILE __FILE;
struct _reent {
  __FILE *_stdin, *_stdout, *_stderr;
};
extern struct _reent *_impure_ptr ;
void
__eprintf (const char *string, const char *expression, unsigned int line,
       const char *filename)
{
  fprintf ((_impure_ptr->_stderr), string, expression, line, filename);
  abort ();
}