[BUG] gcc HEAD 2004-10-08, linux-x-sh-elf, SEGV when building newlib/libm/math/e_scalb.c

[BUG] gcc HEAD 2004-10-08, linux-x-sh-elf, SEGV when building newlib/libm/math/e_scalb.c

[Corinna Vinschen]

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[Please CC me, I'm not subscribed to the list]

Hi,

I encountered the following SEGV when trying to build newlib for sh-elf
using gcc from HEAD, both (gcc and newlib) checked out this morning:

newlib/libm/math/e_scalb.c: In function '__ieee754_scalb':
newlib/libm/math/e_scalb.c:53: internal compiler error: Segmentation fault

This happens in all m2a and m4 multilibs.  I've attached the precompiled
source code.  The SEGV does not occur when building without optimization
or with -O, it only happens with -O2.

Running `cc1 -g -O2 -fno-builtin -m2a e_scalb.i' under GDB reports:

Starting program: [...]/libexec/gcc/sh-elf/4.0.0/cc1 -g -O2 -fno-builtin -m2a e_scalb.i
 __ieee754_scalb

Analyzing compilation unit
Performing intraprocedural optimizations
Assembling functions:
 __ieee754_scalb

Program received signal SIGSEGV, Segmentation fault.
optimize_mode_switching (file=0x0) at [...]/gcc/gcc/lcm.c:1035
1035          if (eg->flags & EDGE_FALLTHRU)
(


Corinna

-- 
Corinna Vinschen
Cygwin Project Co-Leader
Red Hat, Inc.

[-- Attachment #2: e_scalb.i --]
[-- Type: text/plain, Size: 17695 bytes --]

# 1 "/home/corinna/src/newlib/newlib/libm/math/e_scalb.c"
# 1 "/ext/build/cross-sh-elf/newlib/sh-elf/m2a/newlib/libm/math//"
# 1 "<built-in>"
# 1 "<command line>"
# 1 "/home/corinna/src/newlib/newlib/libm/math/e_scalb.c"
# 20 "/home/corinna/src/newlib/newlib/libm/math/e_scalb.c"
# 1 "/home/corinna/src/newlib/newlib/libm/math/../common/fdlibm.h" 1
# 15 "/home/corinna/src/newlib/newlib/libm/math/../common/fdlibm.h"
# 1 "/home/corinna/src/newlib/newlib/libc/include/math.h" 1 3 4





# 1 "/home/corinna/src/newlib/newlib/libc/include/sys/reent.h" 1 3 4
# 13 "/home/corinna/src/newlib/newlib/libc/include/sys/reent.h" 3 4
# 1 "/home/corinna/src/newlib/newlib/libc/include/_ansi.h" 1 3 4
# 15 "/home/corinna/src/newlib/newlib/libc/include/_ansi.h" 3 4
# 1 "/ext/build/cross-sh-elf/newlib/sh-elf/m2a/newlib/targ-include/newlib.h" 1 3 4
# 16 "/home/corinna/src/newlib/newlib/libc/include/_ansi.h" 2 3 4
# 1 "/home/corinna/src/newlib/newlib/libc/include/sys/config.h" 1 3 4



# 1 "/home/corinna/src/newlib/newlib/libc/include/machine/ieeefp.h" 1 3 4
# 5 "/home/corinna/src/newlib/newlib/libc/include/sys/config.h" 2 3 4
# 17 "/home/corinna/src/newlib/newlib/libc/include/_ansi.h" 2 3 4
# 14 "/home/corinna/src/newlib/newlib/libc/include/sys/reent.h" 2 3 4
# 1 "/home/corinna/src/newlib/newlib/libc/include/sys/_types.h" 1 3 4
# 12 "/home/corinna/src/newlib/newlib/libc/include/sys/_types.h" 3 4
# 1 "/home/corinna/src/newlib/newlib/libc/include/sys/lock.h" 1 3 4





typedef int _LOCK_T;
typedef int _LOCK_RECURSIVE_T;
# 13 "/home/corinna/src/newlib/newlib/libc/include/sys/_types.h" 2 3 4

typedef long _off_t;
__extension__ typedef long long _off64_t;


typedef int _ssize_t;





# 1 "/opt/redhat/cross-sh-elf/bin/../lib/gcc/sh-elf/4.0.0/include/stddef.h" 1 3 4
# 355 "/opt/redhat/cross-sh-elf/bin/../lib/gcc/sh-elf/4.0.0/include/stddef.h" 3 4
typedef unsigned int wint_t;
# 25 "/home/corinna/src/newlib/newlib/libc/include/sys/_types.h" 2 3 4


typedef struct
{
  int __count;
  union
  {
    wint_t __wch;
    unsigned char __wchb[4];
  } __value;
} _mbstate_t;

typedef _LOCK_RECURSIVE_T _flock_t;


typedef void *_iconv_t;
# 15 "/home/corinna/src/newlib/newlib/libc/include/sys/reent.h" 2 3 4




typedef unsigned long __ULong;
# 40 "/home/corinna/src/newlib/newlib/libc/include/sys/reent.h" 3 4
struct _Bigint
{
  struct _Bigint *_next;
  int _k, _maxwds, _sign, _wds;
  __ULong _x[1];
};


struct __tm
{
  int __tm_sec;
  int __tm_min;
  int __tm_hour;
  int __tm_mday;
  int __tm_mon;
  int __tm_year;
  int __tm_wday;
  int __tm_yday;
  int __tm_isdst;
};







struct _on_exit_args {
 void * _fnargs[32];
 void * _dso_handle[32];

 __ULong _fntypes;


 __ULong _is_cxa;
};
# 85 "/home/corinna/src/newlib/newlib/libc/include/sys/reent.h" 3 4
struct _atexit {
 struct _atexit *_next;
 int _ind;

 void (*_fns[32])(void);
        struct _on_exit_args _on_exit_args;
};
# 101 "/home/corinna/src/newlib/newlib/libc/include/sys/reent.h" 3 4
struct __sbuf {
 unsigned char *_base;
 int _size;
};






typedef long _fpos_t;
# 166 "/home/corinna/src/newlib/newlib/libc/include/sys/reent.h" 3 4
struct __sFILE {
  unsigned char *_p;
  int _r;
  int _w;
  short _flags;
  short _file;
  struct __sbuf _bf;
  int _lbfsize;






  void * _cookie;

  int (*_read) (void * _cookie, char *_buf, int _n);
  int (*_write) (void * _cookie, const char *_buf, int _n);

  _fpos_t (*_seek) (void * _cookie, _fpos_t _offset, int _whence);
  int (*_close) (void * _cookie);


  struct __sbuf _ub;
  unsigned char *_up;
  int _ur;


  unsigned char _ubuf[3];
  unsigned char _nbuf[1];


  struct __sbuf _lb;


  int _blksize;
  int _offset;


  struct _reent *_data;



  _flock_t _lock;

};
# 259 "/home/corinna/src/newlib/newlib/libc/include/sys/reent.h" 3 4
typedef struct __sFILE __FILE;


struct _glue
{
  struct _glue *_next;
  int _niobs;
  __FILE *_iobs;
};
# 290 "/home/corinna/src/newlib/newlib/libc/include/sys/reent.h" 3 4
struct _rand48 {
  unsigned short _seed[3];
  unsigned short _mult[3];
  unsigned short _add;




};
# 565 "/home/corinna/src/newlib/newlib/libc/include/sys/reent.h" 3 4
struct _reent
{
  int _errno;




  __FILE *_stdin, *_stdout, *_stderr;

  int _inc;
  char _emergency[25];

  int _current_category;
  const char *_current_locale;

  int __sdidinit;

  void (*__cleanup) (struct _reent *);


  struct _Bigint *_result;
  int _result_k;
  struct _Bigint *_p5s;
  struct _Bigint **_freelist;


  int _cvtlen;
  char *_cvtbuf;

  union
    {
      struct
        {
          unsigned int _unused_rand;
          char * _strtok_last;
          char _asctime_buf[26];
          struct __tm _localtime_buf;
          int _gamma_signgam;
          __extension__ unsigned long long _rand_next;
          struct _rand48 _r48;
          _mbstate_t _mblen_state;
          _mbstate_t _mbtowc_state;
          _mbstate_t _wctomb_state;
          char _l64a_buf[8];
          char _signal_buf[24];
          int _getdate_err;
          _mbstate_t _mbrlen_state;
          _mbstate_t _mbrtowc_state;
          _mbstate_t _mbsrtowcs_state;
          _mbstate_t _wcrtomb_state;
          _mbstate_t _wcsrtombs_state;
        } _reent;



      struct
        {

          unsigned char * _nextf[30];
          unsigned int _nmalloc[30];
        } _unused;
    } _new;


  struct _atexit *_atexit;
  struct _atexit _atexit0;


  void (**(_sig_func))(int);




  struct _glue __sglue;
  __FILE __sf[3];
};
# 799 "/home/corinna/src/newlib/newlib/libc/include/sys/reent.h" 3 4
extern struct _reent *_impure_ptr ;
extern struct _reent *const _global_impure_ptr ;

void _reclaim_reent (struct _reent *);
# 7 "/home/corinna/src/newlib/newlib/libc/include/math.h" 2 3 4

# 1 "/home/corinna/src/newlib/newlib/libc/include/_ansi.h" 1 3 4
# 9 "/home/corinna/src/newlib/newlib/libc/include/math.h" 2 3 4








union __dmath
{
  __ULong i[2];
  double d;
};




extern const union __dmath __infinity[];
# 35 "/home/corinna/src/newlib/newlib/libc/include/math.h" 3 4
extern double atan (double);
extern double cos (double);
extern double sin (double);
extern double tan (double);
extern double tanh (double);
extern double frexp (double, int *);
extern double modf (double, double *);
extern double ceil (double);
extern double fabs (double);
extern double floor (double);






extern double acos (double);
extern double asin (double);
extern double atan2 (double, double);
extern double cosh (double);
extern double sinh (double);
extern double exp (double);
extern double ldexp (double, int);
extern double log (double);
extern double log10 (double);
extern double pow (double, double);
extern double sqrt (double);
extern double fmod (double, double);
# 72 "/home/corinna/src/newlib/newlib/libc/include/math.h" 3 4
typedef float float_t;
typedef double double_t;
# 82 "/home/corinna/src/newlib/newlib/libc/include/math.h" 3 4
extern int __fpclassifyf (float x);
extern int __fpclassifyd (double x);
extern int __signbitf (float x);
extern int __signbitd (double x);
# 123 "/home/corinna/src/newlib/newlib/libc/include/math.h" 3 4
extern double infinity (void);
extern double nan (const char *);
extern int isnan (double);
extern int isinf (double);
extern int finite (double);
extern double copysign (double, double);
extern int ilogb (double);

extern double asinh (double);
extern double cbrt (double);
extern double nextafter (double, double);
extern double rint (double);
extern double scalbn (double, int);

extern double exp2 (double);
extern double scalbln (double, long int);
extern double tgamma (double);
extern double nearbyint (double);
extern long int lrint (double);
extern double round (double);
extern long int lround (double);
extern double trunc (double);
extern double remquo (double, double, int *);
extern double copysign (double, double);
extern double fdim (double, double);
extern double fmax (double, double);
extern double fmin (double, double);
extern double fma (double, double, double);
extern void sincos (double, double *, double *);


extern double log1p (double);
extern double expm1 (double);



extern double acosh (double);
extern double atanh (double);
extern double remainder (double, double);
extern double gamma (double);
extern double gamma_r (double, int *);
extern double lgamma (double);
extern double lgamma_r (double, int *);
extern double erf (double);
extern double erfc (double);
extern double y0 (double);
extern double y1 (double);
extern double yn (int, double);
extern double j0 (double);
extern double j1 (double);
extern double jn (int, double);



extern double hypot (double, double);


extern double cabs();
extern double drem (double, double);
# 191 "/home/corinna/src/newlib/newlib/libc/include/math.h" 3 4
extern float atanf (float);
extern float cosf (float);
extern float sinf (float);
extern float tanf (float);
extern float tanhf (float);
extern float frexpf (float, int *);
extern float modff (float, float *);
extern float ceilf (float);
extern float fabsf (float);
extern float floorf (float);


extern float acosf (float);
extern float asinf (float);
extern float atan2f (float, float);
extern float coshf (float);
extern float sinhf (float);
extern float expf (float);
extern float ldexpf (float, int);
extern float logf (float);
extern float log10f (float);
extern float powf (float, float);
extern float sqrtf (float);
extern float fmodf (float, float);
# 223 "/home/corinna/src/newlib/newlib/libc/include/math.h" 3 4
extern float exp2f (float);
extern float scalblnf (float, long int);
extern float tgammaf (float);
extern float nearbyintf (float);
extern long int lrintf (float);
extern float roundf (float);
extern long int lroundf (float);
extern float truncf (float);
extern float remquof (float, float, int *);
extern float copysignf (float, float);
extern float fdimf (float, float);
extern float fmaxf (float, float);
extern float fminf (float, float);
extern float fmaf (float, float, float);

extern float infinityf (void);
extern float nanf (const char *);
extern int isnanf (float);
extern int isinff (float);
extern int finitef (float);
extern float copysignf (float, float);
extern int ilogbf (float);

extern float asinhf (float);
extern float cbrtf (float);
extern float nextafterf (float, float);
extern float rintf (float);
extern float scalbnf (float, int);
extern float log1pf (float);
extern float expm1f (float);
extern void sincosf (float, float *, float *);


extern float acoshf (float);
extern float atanhf (float);
extern float remainderf (float, float);
extern float gammaf (float);
extern float gammaf_r (float, int *);
extern float lgammaf (float);
extern float lgammaf_r (float, int *);
extern float erff (float);
extern float erfcf (float);
extern float y0f (float);
extern float y1f (float);
extern float ynf (int, float);
extern float j0f (float);
extern float j1f (float);
extern float jnf (int, float);

extern float hypotf (float, float);

extern float cabsf();
extern float dremf (float, float);






extern int *__signgam (void);
# 292 "/home/corinna/src/newlib/newlib/libc/include/math.h" 3 4
struct exception

{
  int type;
  char *name;
  double arg1;
  double arg2;
  double retval;
  int err;
};




extern int matherr (struct exception *e);
# 347 "/home/corinna/src/newlib/newlib/libc/include/math.h" 3 4
enum __fdlibm_version
{
  __fdlibm_ieee = -1,
  __fdlibm_svid,
  __fdlibm_xopen,
  __fdlibm_posix
};




extern const enum __fdlibm_version __fdlib_version;
# 367 "/home/corinna/src/newlib/newlib/libc/include/math.h" 3 4

# 16 "/home/corinna/src/newlib/newlib/libm/math/../common/fdlibm.h" 2
# 1 "/home/corinna/src/newlib/newlib/libc/include/sys/types.h" 1 3 4
# 24 "/home/corinna/src/newlib/newlib/libc/include/sys/types.h" 3 4
typedef short int __int16_t;
typedef unsigned short int __uint16_t;





typedef int __int32_t;
typedef unsigned int __uint32_t;






__extension__ typedef long long __int64_t;
__extension__ typedef unsigned long long __uint64_t;
# 55 "/home/corinna/src/newlib/newlib/libc/include/sys/types.h" 3 4
# 1 "/opt/redhat/cross-sh-elf/bin/../lib/gcc/sh-elf/4.0.0/include/stddef.h" 1 3 4
# 152 "/opt/redhat/cross-sh-elf/bin/../lib/gcc/sh-elf/4.0.0/include/stddef.h" 3 4
typedef int ptrdiff_t;
# 214 "/opt/redhat/cross-sh-elf/bin/../lib/gcc/sh-elf/4.0.0/include/stddef.h" 3 4
typedef unsigned int size_t;
# 326 "/opt/redhat/cross-sh-elf/bin/../lib/gcc/sh-elf/4.0.0/include/stddef.h" 3 4
typedef long int wchar_t;
# 56 "/home/corinna/src/newlib/newlib/libc/include/sys/types.h" 2 3 4
# 1 "/home/corinna/src/newlib/newlib/libc/include/machine/types.h" 1 3 4
# 36 "/home/corinna/src/newlib/newlib/libc/include/machine/types.h" 3 4
typedef long int __off_t;
typedef int __pid_t;

__extension__ typedef long long int __loff_t;
# 57 "/home/corinna/src/newlib/newlib/libc/include/sys/types.h" 2 3 4
# 78 "/home/corinna/src/newlib/newlib/libc/include/sys/types.h" 3 4
typedef unsigned char u_char;
typedef unsigned short u_short;
typedef unsigned int u_int;
typedef unsigned long u_long;



typedef unsigned short ushort;
typedef unsigned int uint;



typedef unsigned long clock_t;




typedef long time_t;




struct timespec {
  time_t tv_sec;
  long tv_nsec;
};

struct itimerspec {
  struct timespec it_interval;
  struct timespec it_value;
};


typedef long daddr_t;
typedef char * caddr_t;
# 121 "/home/corinna/src/newlib/newlib/libc/include/sys/types.h" 3 4
typedef unsigned short ino_t;
# 155 "/home/corinna/src/newlib/newlib/libc/include/sys/types.h" 3 4
typedef short dev_t;




typedef long off_t;

typedef unsigned short uid_t;
typedef unsigned short gid_t;


typedef int pid_t;

typedef long key_t;

typedef _ssize_t ssize_t;
# 184 "/home/corinna/src/newlib/newlib/libc/include/sys/types.h" 3 4
typedef unsigned int mode_t __attribute__ ((__mode__ (__SI__)));




typedef unsigned short nlink_t;
# 211 "/home/corinna/src/newlib/newlib/libc/include/sys/types.h" 3 4
typedef long fd_mask;







typedef struct _types_fd_set {
 fd_mask fds_bits[(((64)+(((sizeof (fd_mask) * 8))-1))/((sizeof (fd_mask) * 8)))];
} _types_fd_set;
# 17 "/home/corinna/src/newlib/newlib/libm/math/../common/fdlibm.h" 2
# 142 "/home/corinna/src/newlib/newlib/libm/math/../common/fdlibm.h"
extern double logb (double);



extern double scalb (double, double);

extern double significand (double);


extern double __ieee754_sqrt (double);
extern double __ieee754_acos (double);
extern double __ieee754_acosh (double);
extern double __ieee754_log (double);
extern double __ieee754_atanh (double);
extern double __ieee754_asin (double);
extern double __ieee754_atan2 (double,double);
extern double __ieee754_exp (double);
extern double __ieee754_cosh (double);
extern double __ieee754_fmod (double,double);
extern double __ieee754_pow (double,double);
extern double __ieee754_lgamma_r (double,int *);
extern double __ieee754_gamma_r (double,int *);
extern double __ieee754_log10 (double);
extern double __ieee754_sinh (double);
extern double __ieee754_hypot (double,double);
extern double __ieee754_j0 (double);
extern double __ieee754_j1 (double);
extern double __ieee754_y0 (double);
extern double __ieee754_y1 (double);
extern double __ieee754_jn (int,double);
extern double __ieee754_yn (int,double);
extern double __ieee754_remainder (double,double);
extern __int32_t __ieee754_rem_pio2 (double,double*);



extern double __ieee754_scalb (double,double);



extern double __kernel_standard (double,double,int);
extern double __kernel_sin (double,double,int);
extern double __kernel_cos (double,double);
extern double __kernel_tan (double,double,int);
extern int __kernel_rem_pio2 (double*,double*,int,int,int,const __int32_t*);


extern float logbf (float);



extern float scalbf (float, float);

extern float significandf (float);


extern float __ieee754_sqrtf (float);
extern float __ieee754_acosf (float);
extern float __ieee754_acoshf (float);
extern float __ieee754_logf (float);
extern float __ieee754_atanhf (float);
extern float __ieee754_asinf (float);
extern float __ieee754_atan2f (float,float);
extern float __ieee754_expf (float);
extern float __ieee754_coshf (float);
extern float __ieee754_fmodf (float,float);
extern float __ieee754_powf (float,float);
extern float __ieee754_lgammaf_r (float,int *);
extern float __ieee754_gammaf_r (float,int *);
extern float __ieee754_log10f (float);
extern float __ieee754_sinhf (float);
extern float __ieee754_hypotf (float,float);
extern float __ieee754_j0f (float);
extern float __ieee754_j1f (float);
extern float __ieee754_y0f (float);
extern float __ieee754_y1f (float);
extern float __ieee754_jnf (int,float);
extern float __ieee754_ynf (int,float);
extern float __ieee754_remainderf (float,float);
extern __int32_t __ieee754_rem_pio2f (float,float*);



extern float __ieee754_scalbf (float,float);



extern float __kernel_sinf (float,float,int);
extern float __kernel_cosf (float,float);
extern float __kernel_tanf (float,float,int);
extern int __kernel_rem_pio2f (float*,float*,int,int,int,const __int32_t*);
# 256 "/home/corinna/src/newlib/newlib/libm/math/../common/fdlibm.h"
typedef union
{
  double value;
  struct
  {
    __uint32_t msw;
    __uint32_t lsw;
  } parts;
} ieee_double_shape_type;
# 343 "/home/corinna/src/newlib/newlib/libm/math/../common/fdlibm.h"
typedef union
{
  float value;
  __uint32_t word;
} ieee_float_shape_type;
# 21 "/home/corinna/src/newlib/newlib/libm/math/e_scalb.c" 2
# 33 "/home/corinna/src/newlib/newlib/libm/math/e_scalb.c"
 double __ieee754_scalb(double x, double fn)





{



 if (isnan(x)||isnan(fn)) return x*fn;
 if (!finite(fn)) {
     if(fn>0.0) return x*fn;
     else return x/(-fn);
 }
 if (rint(fn)!=fn) return (fn-fn)/(fn-fn);
 if ( fn > 65000.0) return scalbn(x, 65000);
 if (-fn > 65000.0) return scalbn(x,-65000);
 return scalbn(x,(int)fn);

}

Re: [BUG] gcc HEAD 2004-10-08, linux-x-sh-elf, SEGV when building newlib/libm/math/e_scalb.c

[Ben Elliston]

Hi Corinna,

> I encountered the following SEGV when trying to build newlib for sh-elf
> using gcc from HEAD, both (gcc and newlib) checked out this morning:
> 
> newlib/libm/math/e_scalb.c: In function '__ieee754_scalb':
> newlib/libm/math/e_scalb.c:53: internal compiler error: Segmentation fault

I think this is the same problem that Joern ran into.  Please try
again using HEAD, as I've committed a patch which should correct it.

Cheers, Ben