Re: [PATCH v2] Target-independent store forwarding avoidance.

[Jeff Law <jeffreyalaw@gmail.com>]

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On 6/7/24 4:31 PM, Jeff Law wrote:

> 
> I've actually added it to my tester just to see if there's any fallout. 
> It'll take a week to churn through the long running targets that 
> bootstrap in QEMU, but the crosses should have data Monday.
The first round naturally didn't trigger anything because the option is 
off by default.  So I twiddled it to be on at -O1 and above.

epiphany-elf ICEs in gen_rtx_SUBREG with the attached .i file compiled 
with -O2:

> root@577c7458c93a://home/jlaw/jenkins/workspace/epiphany-elf/epiphany-elf-obj/newlib/epiphany-elf/newlib/libm/complex# epiphany-elf-gcc -O2 libm_a-cacos.i
> during RTL pass: avoid_store_forwarding
> ../../../..//newlib-cygwin/newlib/libm/complex/cacos.c: In function 'cacos':
> ../../../..//newlib-cygwin/newlib/libm/complex/cacos.c:99:1: internal compiler error: in gen_rtx_SUBREG, at emit-rtl.cc:1032
> 0x614538 gen_rtx_SUBREG(machine_mode, rtx_def*, poly_int<1u, unsigned long>)
>         ../../..//gcc/gcc/emit-rtl.cc:1032
> 0x614538 gen_rtx_SUBREG(machine_mode, rtx_def*, poly_int<1u, unsigned long>)
>         ../../..//gcc/gcc/emit-rtl.cc:1030
> 0xe82216 process_forwardings
>         ../../..//gcc/gcc/avoid-store-forwarding.cc:273
> 0xe82216 avoid_store_forwarding
>         ../../..//gcc/gcc/avoid-store-forwarding.cc:489
> 0xe82667 execute
>         ../../..//gcc/gcc/avoid-store-forwarding.cc:558


ft32-elf ICE'd in bitmap_check_index at various optimization levels:

> FAIL: execute/pr108498-2.c   -O1  (internal compiler error: in bitmap_check_index, at sbitmap.h:104)
> FAIL: execute/pr108498-2.c   -O1  (test for excess errors)
> FAIL: execute/pr108498-2.c   -O2  (internal compiler error: in bitmap_check_index, at sbitmap.h:104)
> FAIL: execute/pr108498-2.c   -O2  (test for excess errors)
> FAIL: execute/pr108498-2.c   -O3 -g  (internal compiler error: in bitmap_check_index, at sbitmap.h:104)
> FAIL: execute/pr108498-2.c   -O3 -g  (test for excess errors)


avr, c6x,

lm32-elf failed to build libgcc with an ICE in leaf_function_p, I 
haven't isolated that yet.


There were other failures as well.  But you've got a few to start with 
and we can retest pretty easily as the patch evolves.

jeff


[-- Attachment #2: libm_a-cacos.i --]
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# 0 "../../../..//newlib-cygwin/newlib/libm/complex/cacos.c"
# 1 "//home/jlaw/jenkins/workspace/epiphany-elf/epiphany-elf-obj/newlib/epiphany-elf/newlib//"
# 0 "<built-in>"
# 0 "<command-line>"
# 1 "../../../..//newlib-cygwin/newlib/libm/complex/cacos.c"
# 77 "../../../..//newlib-cygwin/newlib/libm/complex/cacos.c"
# 1 "/home/jlaw/jenkins/workspace/epiphany-elf/newlib-cygwin/newlib/libc/include/complex.h" 1 3 4
# 15 "/home/jlaw/jenkins/workspace/epiphany-elf/newlib-cygwin/newlib/libc/include/complex.h" 3 4
# 1 "/home/jlaw/jenkins/workspace/epiphany-elf/newlib-cygwin/newlib/libc/include/sys/cdefs.h" 1 3 4
# 45 "/home/jlaw/jenkins/workspace/epiphany-elf/newlib-cygwin/newlib/libc/include/sys/cdefs.h" 3 4
# 1 "/home/jlaw/jenkins/workspace/epiphany-elf/newlib-cygwin/newlib/libc/include/machine/_default_types.h" 1 3 4







# 1 "/home/jlaw/jenkins/workspace/epiphany-elf/newlib-cygwin/newlib/libc/include/sys/features.h" 1 3 4
# 28 "/home/jlaw/jenkins/workspace/epiphany-elf/newlib-cygwin/newlib/libc/include/sys/features.h" 3 4
# 1 "./_newlib_version.h" 1 3 4
# 29 "/home/jlaw/jenkins/workspace/epiphany-elf/newlib-cygwin/newlib/libc/include/sys/features.h" 2 3 4
# 9 "/home/jlaw/jenkins/workspace/epiphany-elf/newlib-cygwin/newlib/libc/include/machine/_default_types.h" 2 3 4
# 41 "/home/jlaw/jenkins/workspace/epiphany-elf/newlib-cygwin/newlib/libc/include/machine/_default_types.h" 3 4

# 41 "/home/jlaw/jenkins/workspace/epiphany-elf/newlib-cygwin/newlib/libc/include/machine/_default_types.h" 3 4
typedef signed char __int8_t;

typedef unsigned char __uint8_t;
# 55 "/home/jlaw/jenkins/workspace/epiphany-elf/newlib-cygwin/newlib/libc/include/machine/_default_types.h" 3 4
typedef short int __int16_t;

typedef short unsigned int __uint16_t;
# 77 "/home/jlaw/jenkins/workspace/epiphany-elf/newlib-cygwin/newlib/libc/include/machine/_default_types.h" 3 4
typedef long int __int32_t;

typedef long unsigned int __uint32_t;
# 103 "/home/jlaw/jenkins/workspace/epiphany-elf/newlib-cygwin/newlib/libc/include/machine/_default_types.h" 3 4
typedef long long int __int64_t;

typedef long long unsigned int __uint64_t;
# 134 "/home/jlaw/jenkins/workspace/epiphany-elf/newlib-cygwin/newlib/libc/include/machine/_default_types.h" 3 4
typedef signed char __int_least8_t;

typedef unsigned char __uint_least8_t;
# 160 "/home/jlaw/jenkins/workspace/epiphany-elf/newlib-cygwin/newlib/libc/include/machine/_default_types.h" 3 4
typedef short int __int_least16_t;

typedef short unsigned int __uint_least16_t;
# 182 "/home/jlaw/jenkins/workspace/epiphany-elf/newlib-cygwin/newlib/libc/include/machine/_default_types.h" 3 4
typedef long int __int_least32_t;

typedef long unsigned int __uint_least32_t;
# 200 "/home/jlaw/jenkins/workspace/epiphany-elf/newlib-cygwin/newlib/libc/include/machine/_default_types.h" 3 4
typedef long long int __int_least64_t;

typedef long long unsigned int __uint_least64_t;
# 214 "/home/jlaw/jenkins/workspace/epiphany-elf/newlib-cygwin/newlib/libc/include/machine/_default_types.h" 3 4
typedef long long int __intmax_t;







typedef long long unsigned int __uintmax_t;







typedef long int __intptr_t;

typedef long unsigned int __uintptr_t;
# 46 "/home/jlaw/jenkins/workspace/epiphany-elf/newlib-cygwin/newlib/libc/include/sys/cdefs.h" 2 3 4

# 1 "/home/jlaw/jenkins/workspace/epiphany-elf/epiphany-elf-installed/lib/gcc/epiphany-elf/15.0.0/include/stddef.h" 1 3 4
# 145 "/home/jlaw/jenkins/workspace/epiphany-elf/epiphany-elf-installed/lib/gcc/epiphany-elf/15.0.0/include/stddef.h" 3 4
typedef long int ptrdiff_t;
# 214 "/home/jlaw/jenkins/workspace/epiphany-elf/epiphany-elf-installed/lib/gcc/epiphany-elf/15.0.0/include/stddef.h" 3 4
typedef long unsigned int size_t;
# 329 "/home/jlaw/jenkins/workspace/epiphany-elf/epiphany-elf-installed/lib/gcc/epiphany-elf/15.0.0/include/stddef.h" 3 4
typedef unsigned int wchar_t;
# 425 "/home/jlaw/jenkins/workspace/epiphany-elf/epiphany-elf-installed/lib/gcc/epiphany-elf/15.0.0/include/stddef.h" 3 4
typedef struct {
  long long __max_align_ll __attribute__((__aligned__(__alignof__(long long))));
  long double __max_align_ld __attribute__((__aligned__(__alignof__(long double))));
# 436 "/home/jlaw/jenkins/workspace/epiphany-elf/epiphany-elf-installed/lib/gcc/epiphany-elf/15.0.0/include/stddef.h" 3 4
} max_align_t;
# 48 "/home/jlaw/jenkins/workspace/epiphany-elf/newlib-cygwin/newlib/libc/include/sys/cdefs.h" 2 3 4
# 16 "/home/jlaw/jenkins/workspace/epiphany-elf/newlib-cygwin/newlib/libc/include/complex.h" 2 3 4





double _Complex cacos(double _Complex);
float _Complex cacosf(float _Complex);
long double _Complex cacosl(long double _Complex);


double _Complex casin(double _Complex);
float _Complex casinf(float _Complex);
long double _Complex casinl(long double _Complex);


double _Complex catan(double _Complex);
float _Complex catanf(float _Complex);
long double _Complex catanl(long double _Complex);


double _Complex ccos(double _Complex);
float _Complex ccosf(float _Complex);
long double _Complex ccosl(long double _Complex);


double _Complex csin(double _Complex);
float _Complex csinf(float _Complex);
long double _Complex csinl(long double _Complex);


double _Complex ctan(double _Complex);
float _Complex ctanf(float _Complex);
long double _Complex ctanl(long double _Complex);



double _Complex cacosh(double _Complex);
float _Complex cacoshf(float _Complex);
long double _Complex cacoshl(long double _Complex);


double _Complex casinh(double _Complex);
float _Complex casinhf(float _Complex);
long double _Complex casinhl(long double _Complex);


double _Complex catanh(double _Complex);
float _Complex catanhf(float _Complex);
long double _Complex catanhl(long double _Complex);


double _Complex ccosh(double _Complex);
float _Complex ccoshf(float _Complex);
long double _Complex ccoshl(long double _Complex);


double _Complex csinh(double _Complex);
float _Complex csinhf(float _Complex);
long double _Complex csinhl(long double _Complex);


double _Complex ctanh(double _Complex);
float _Complex ctanhf(float _Complex);
long double _Complex ctanhl(long double _Complex);



double _Complex cexp(double _Complex);
float _Complex cexpf(float _Complex);
long double _Complex cexpl(long double _Complex);


double _Complex clog(double _Complex);
float _Complex clogf(float _Complex);
long double _Complex clogl(long double _Complex);
# 100 "/home/jlaw/jenkins/workspace/epiphany-elf/newlib-cygwin/newlib/libc/include/complex.h" 3 4
long double cabsl(long double _Complex) ;
double cabs(double _Complex) ;
float cabsf(float _Complex) ;


double _Complex cpow(double _Complex, double _Complex);
float _Complex cpowf(float _Complex, float _Complex);
long double _Complex cpowl(long double _Complex, long double _Complex);


double _Complex csqrt(double _Complex);
float _Complex csqrtf(float _Complex);
long double _Complex csqrtl(long double _Complex);



double carg(double _Complex);
float cargf(float _Complex);
long double cargl(long double _Complex);


double cimag(double _Complex);
float cimagf(float _Complex);
long double cimagl(long double _Complex);


double _Complex conj(double _Complex);
float _Complex conjf(float _Complex);
long double _Complex conjl(long double _Complex);


double _Complex cproj(double _Complex);
float _Complex cprojf(float _Complex);
long double _Complex cprojl(long double _Complex);


double creal(double _Complex);
float crealf(float _Complex);
long double creall(long double _Complex);
# 148 "/home/jlaw/jenkins/workspace/epiphany-elf/newlib-cygwin/newlib/libc/include/complex.h" 3 4

# 78 "../../../..//newlib-cygwin/newlib/libm/complex/cacos.c" 2
# 1 "/home/jlaw/jenkins/workspace/epiphany-elf/newlib-cygwin/newlib/libc/include/math.h" 1 3 4




# 1 "/home/jlaw/jenkins/workspace/epiphany-elf/newlib-cygwin/newlib/libc/include/sys/reent.h" 1 3 4
# 13 "/home/jlaw/jenkins/workspace/epiphany-elf/newlib-cygwin/newlib/libc/include/sys/reent.h" 3 4
# 1 "/home/jlaw/jenkins/workspace/epiphany-elf/newlib-cygwin/newlib/libc/include/_ansi.h" 1 3 4
# 10 "/home/jlaw/jenkins/workspace/epiphany-elf/newlib-cygwin/newlib/libc/include/_ansi.h" 3 4
# 1 "./newlib.h" 1 3 4
# 11 "/home/jlaw/jenkins/workspace/epiphany-elf/newlib-cygwin/newlib/libc/include/_ansi.h" 2 3 4
# 1 "/home/jlaw/jenkins/workspace/epiphany-elf/newlib-cygwin/newlib/libc/include/sys/config.h" 1 3 4



# 1 "/home/jlaw/jenkins/workspace/epiphany-elf/newlib-cygwin/newlib/libc/include/machine/ieeefp.h" 1 3 4
# 5 "/home/jlaw/jenkins/workspace/epiphany-elf/newlib-cygwin/newlib/libc/include/sys/config.h" 2 3 4
# 12 "/home/jlaw/jenkins/workspace/epiphany-elf/newlib-cygwin/newlib/libc/include/_ansi.h" 2 3 4
# 14 "/home/jlaw/jenkins/workspace/epiphany-elf/newlib-cygwin/newlib/libc/include/sys/reent.h" 2 3 4
# 1 "/home/jlaw/jenkins/workspace/epiphany-elf/epiphany-elf-installed/lib/gcc/epiphany-elf/15.0.0/include/stddef.h" 1 3 4
# 15 "/home/jlaw/jenkins/workspace/epiphany-elf/newlib-cygwin/newlib/libc/include/sys/reent.h" 2 3 4

# 1 "/home/jlaw/jenkins/workspace/epiphany-elf/newlib-cygwin/newlib/libc/include/sys/_types.h" 1 3 4
# 24 "/home/jlaw/jenkins/workspace/epiphany-elf/newlib-cygwin/newlib/libc/include/sys/_types.h" 3 4
# 1 "/home/jlaw/jenkins/workspace/epiphany-elf/epiphany-elf-installed/lib/gcc/epiphany-elf/15.0.0/include/stddef.h" 1 3 4
# 359 "/home/jlaw/jenkins/workspace/epiphany-elf/epiphany-elf-installed/lib/gcc/epiphany-elf/15.0.0/include/stddef.h" 3 4
typedef unsigned int wint_t;
# 25 "/home/jlaw/jenkins/workspace/epiphany-elf/newlib-cygwin/newlib/libc/include/sys/_types.h" 2 3 4


# 1 "/home/jlaw/jenkins/workspace/epiphany-elf/newlib-cygwin/newlib/libc/include/machine/_types.h" 1 3 4
# 28 "/home/jlaw/jenkins/workspace/epiphany-elf/newlib-cygwin/newlib/libc/include/sys/_types.h" 2 3 4


typedef long __blkcnt_t;



typedef long __blksize_t;



typedef __uint64_t __fsblkcnt_t;



typedef __uint32_t __fsfilcnt_t;



typedef long _off_t;





typedef int __pid_t;



typedef short __dev_t;



typedef unsigned short __uid_t;


typedef unsigned short __gid_t;



typedef __uint32_t __id_t;







typedef unsigned short __ino_t;
# 90 "/home/jlaw/jenkins/workspace/epiphany-elf/newlib-cygwin/newlib/libc/include/sys/_types.h" 3 4
typedef __uint32_t __mode_t;





__extension__ typedef long long _off64_t;





typedef _off_t __off_t;


typedef _off64_t __loff_t;


typedef long __key_t;







typedef long _fpos_t;
# 131 "/home/jlaw/jenkins/workspace/epiphany-elf/newlib-cygwin/newlib/libc/include/sys/_types.h" 3 4
typedef long unsigned int __size_t;
# 147 "/home/jlaw/jenkins/workspace/epiphany-elf/newlib-cygwin/newlib/libc/include/sys/_types.h" 3 4
typedef long signed int _ssize_t;
# 158 "/home/jlaw/jenkins/workspace/epiphany-elf/newlib-cygwin/newlib/libc/include/sys/_types.h" 3 4
typedef _ssize_t __ssize_t;



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




typedef void *_iconv_t;






typedef unsigned long __clock_t;






typedef __int_least64_t __time_t;





typedef unsigned long __clockid_t;


typedef long __daddr_t;



typedef unsigned long __timer_t;


typedef __uint8_t __sa_family_t;



typedef __uint32_t __socklen_t;


typedef int __nl_item;
typedef unsigned short __nlink_t;
typedef long __suseconds_t;
typedef unsigned long __useconds_t;







typedef __builtin_va_list __va_list;
# 17 "/home/jlaw/jenkins/workspace/epiphany-elf/newlib-cygwin/newlib/libc/include/sys/reent.h" 2 3 4






typedef unsigned long __ULong;
# 35 "/home/jlaw/jenkins/workspace/epiphany-elf/newlib-cygwin/newlib/libc/include/sys/reent.h" 3 4
# 1 "/home/jlaw/jenkins/workspace/epiphany-elf/newlib-cygwin/newlib/libc/include/sys/lock.h" 1 3 4
# 11 "/home/jlaw/jenkins/workspace/epiphany-elf/newlib-cygwin/newlib/libc/include/sys/lock.h" 3 4
typedef int _LOCK_T;
typedef int _LOCK_RECURSIVE_T;
# 36 "/home/jlaw/jenkins/workspace/epiphany-elf/newlib-cygwin/newlib/libc/include/sys/reent.h" 2 3 4
typedef _LOCK_RECURSIVE_T _flock_t;







struct _reent;

struct __locale_t;






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;
};
# 99 "/home/jlaw/jenkins/workspace/epiphany-elf/newlib-cygwin/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;
};
# 116 "/home/jlaw/jenkins/workspace/epiphany-elf/newlib-cygwin/newlib/libc/include/sys/reent.h" 3 4
struct __sbuf {
 unsigned char *_base;
 int _size;
};
# 153 "/home/jlaw/jenkins/workspace/epiphany-elf/newlib-cygwin/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) (struct _reent *, void *,
        char *, int);
  int (*_write) (struct _reent *, void *,
         const char *,
         int);
  _fpos_t (*_seek) (struct _reent *, void *, _fpos_t, int);
  int (*_close) (struct _reent *, void *);


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


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


  struct __sbuf _lb;


  int _blksize;
  _off_t _offset;


  struct _reent *_data;



  _flock_t _lock;

  _mbstate_t _mbstate;
  int _flags2;
};
# 270 "/home/jlaw/jenkins/workspace/epiphany-elf/newlib-cygwin/newlib/libc/include/sys/reent.h" 3 4
typedef struct __sFILE __FILE;



extern __FILE __sf[3];

struct _glue
{
  struct _glue *_next;
  int _niobs;
  __FILE *_iobs;
};

extern struct _glue __sglue;
# 306 "/home/jlaw/jenkins/workspace/epiphany-elf/newlib-cygwin/newlib/libc/include/sys/reent.h" 3 4
struct _rand48 {
  unsigned short _seed[3];
  unsigned short _mult[3];
  unsigned short _add;




};
# 578 "/home/jlaw/jenkins/workspace/epiphany-elf/newlib-cygwin/newlib/libc/include/sys/reent.h" 3 4
struct _reent
{
  int _errno;




  __FILE *_stdin, *_stdout, *_stderr;

  int _inc;
  char _emergency[25];




  struct __locale_t *_locale;





  void (*__cleanup) (struct _reent *);


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


  int _cvtlen;
  char *_cvtbuf;

  union
    {
      struct
        {



          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;
   int _h_errno;
# 647 "/home/jlaw/jenkins/workspace/epiphany-elf/newlib-cygwin/newlib/libc/include/sys/reent.h" 3 4
   char _getlocalename_l_buf[32 ];
        } _reent;







    } _new;







  void (**_sig_func)(int);
};
# 797 "/home/jlaw/jenkins/workspace/epiphany-elf/newlib-cygwin/newlib/libc/include/sys/reent.h" 3 4
extern struct _reent *_impure_ptr ;





extern struct _reent _impure_data ;
# 917 "/home/jlaw/jenkins/workspace/epiphany-elf/newlib-cygwin/newlib/libc/include/sys/reent.h" 3 4
extern struct _atexit *__atexit;
extern struct _atexit __atexit0;

extern void (*__stdio_exit_handler) (void);

void _reclaim_reent (struct _reent *);

extern int _fwalk_sglue (struct _reent *, int (*)(struct _reent *, __FILE *),
    struct _glue *);
# 6 "/home/jlaw/jenkins/workspace/epiphany-elf/newlib-cygwin/newlib/libc/include/math.h" 2 3 4

# 1 "/home/jlaw/jenkins/workspace/epiphany-elf/newlib-cygwin/newlib/libc/include/machine/ieeefp.h" 1 3 4
# 8 "/home/jlaw/jenkins/workspace/epiphany-elf/newlib-cygwin/newlib/libc/include/math.h" 2 3 4
# 1 "/home/jlaw/jenkins/workspace/epiphany-elf/newlib-cygwin/newlib/libc/include/_ansi.h" 1 3 4
# 9 "/home/jlaw/jenkins/workspace/epiphany-elf/newlib-cygwin/newlib/libc/include/math.h" 2 3 4


# 86 "/home/jlaw/jenkins/workspace/epiphany-elf/newlib-cygwin/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);




extern int finite (double);
extern int finitef (float);
extern int finitel (long double);
extern int isinff (float);
extern int isnanf (float);





extern int isinf (double);




extern int isnan (double);
# 160 "/home/jlaw/jenkins/workspace/epiphany-elf/newlib-cygwin/newlib/libc/include/math.h" 3 4
    typedef float float_t;
    typedef double double_t;
# 223 "/home/jlaw/jenkins/workspace/epiphany-elf/newlib-cygwin/newlib/libc/include/math.h" 3 4
extern int __isinff (float);
extern int __isinfd (double);
extern int __isnanf (float);
extern int __isnand (double);
extern int __fpclassifyf (float);
extern int __fpclassifyd (double);
extern int __signbitf (float);
extern int __signbitd (double);
# 319 "/home/jlaw/jenkins/workspace/epiphany-elf/newlib-cygwin/newlib/libc/include/math.h" 3 4
extern double infinity (void);
extern double nan (const char *);
extern double copysign (double, double);
extern double logb (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 long long int llrint (double);
extern double round (double);
extern long int lround (double);
extern long long int llround (double);
extern double trunc (double);
extern double remquo (double, double, int *);
extern double fdim (double, double);
extern double fmax (double, double);
extern double fmin (double, double);
extern double fma (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 lgamma (double);
extern double erf (double);
extern double erfc (double);
extern double log2 (double);





extern double hypot (double, double);






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);




extern float exp2f (float);
extern float scalblnf (float, long int);
extern float tgammaf (float);
extern float nearbyintf (float);
extern long int lrintf (float);
extern long long int llrintf (float);
extern float roundf (float);
extern long int lroundf (float);
extern long long int llroundf (float);
extern float truncf (float);
extern float remquof (float, float, int *);
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 float copysignf (float, float);
extern float logbf (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 float acoshf (float);
extern float atanhf (float);
extern float remainderf (float, float);
extern float gammaf (float);
extern float lgammaf (float);
extern float erff (float);
extern float erfcf (float);
extern float log2f (float);
extern float hypotf (float, float);
# 453 "/home/jlaw/jenkins/workspace/epiphany-elf/newlib-cygwin/newlib/libc/include/math.h" 3 4
extern long double atanl (long double);
extern long double cosl (long double);
extern long double sinl (long double);
extern long double tanl (long double);
extern long double tanhl (long double);
extern long double frexpl (long double, int *);
extern long double modfl (long double, long double *);
extern long double ceill (long double);
extern long double fabsl (long double);
extern long double floorl (long double);
extern long double log1pl (long double);
extern long double expm1l (long double);




extern long double acosl (long double);
extern long double asinl (long double);
extern long double atan2l (long double, long double);
extern long double coshl (long double);
extern long double sinhl (long double);
extern long double expl (long double);
extern long double ldexpl (long double, int);
extern long double logl (long double);
extern long double log10l (long double);
extern long double powl (long double, long double);
extern long double sqrtl (long double);
extern long double fmodl (long double, long double);
extern long double hypotl (long double, long double);


extern long double copysignl (long double, long double);
extern long double nanl (const char *);
extern int ilogbl (long double);
extern long double asinhl (long double);
extern long double cbrtl (long double);
extern long double nextafterl (long double, long double);
extern float nexttowardf (float, long double);
extern double nexttoward (double, long double);
extern long double nexttowardl (long double, long double);
extern long double logbl (long double);
extern long double log2l (long double);
extern long double rintl (long double);
extern long double scalbnl (long double, int);
extern long double exp2l (long double);
extern long double scalblnl (long double, long);
extern long double tgammal (long double);
extern long double nearbyintl (long double);
extern long int lrintl (long double);
extern long long int llrintl (long double);
extern long double roundl (long double);
extern long lroundl (long double);
extern long long int llroundl (long double);
extern long double truncl (long double);
extern long double remquol (long double, long double, int *);
extern long double fdiml (long double, long double);
extern long double fmaxl (long double, long double);
extern long double fminl (long double, long double);
extern long double fmal (long double, long double, long double);

extern long double acoshl (long double);
extern long double atanhl (long double);
extern long double remainderl (long double, long double);
extern long double lgammal (long double);
extern long double erfl (long double);
extern long double erfcl (long double);
# 535 "/home/jlaw/jenkins/workspace/epiphany-elf/newlib-cygwin/newlib/libc/include/math.h" 3 4
extern double drem (double, double);
extern float dremf (float, float);



extern double gamma_r (double, int *);
extern double lgamma_r (double, int *);
extern float gammaf_r (float, int *);
extern float lgammaf_r (float, int *);



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 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);
# 597 "/home/jlaw/jenkins/workspace/epiphany-elf/newlib-cygwin/newlib/libc/include/math.h" 3 4
extern int *__signgam (void);
# 639 "/home/jlaw/jenkins/workspace/epiphany-elf/newlib-cygwin/newlib/libc/include/math.h" 3 4

# 79 "../../../..//newlib-cygwin/newlib/libm/complex/cacos.c" 2


# 80 "../../../..//newlib-cygwin/newlib/libm/complex/cacos.c"
double 
# 80 "../../../..//newlib-cygwin/newlib/libm/complex/cacos.c" 3 4
      _Complex

# 81 "../../../..//newlib-cygwin/newlib/libm/complex/cacos.c"
cacos(double 
# 81 "../../../..//newlib-cygwin/newlib/libm/complex/cacos.c" 3 4
            _Complex 
# 81 "../../../..//newlib-cygwin/newlib/libm/complex/cacos.c"
                    z)
{
 double 
# 83 "../../../..//newlib-cygwin/newlib/libm/complex/cacos.c" 3 4
       _Complex 
# 83 "../../../..//newlib-cygwin/newlib/libm/complex/cacos.c"
               w;
# 92 "../../../..//newlib-cygwin/newlib/libm/complex/cacos.c"
 double 
# 92 "../../../..//newlib-cygwin/newlib/libm/complex/cacos.c" 3 4
       _Complex 
# 92 "../../../..//newlib-cygwin/newlib/libm/complex/cacos.c"
               tmp0, tmp1;

 tmp0 = casin(z);
 tmp1 = 
# 95 "../../../..//newlib-cygwin/newlib/libm/complex/cacos.c" 3 4
       1.57079632679489661923 
# 95 "../../../..//newlib-cygwin/newlib/libm/complex/cacos.c"
              - creal(tmp0);
 w = tmp1 - (cimag(tmp0) * 
# 96 "../../../..//newlib-cygwin/newlib/libm/complex/cacos.c" 3 4
                          1.0fi
# 96 "../../../..//newlib-cygwin/newlib/libm/complex/cacos.c"
                           );

 return w;
}