[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]

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 ();

}