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      1 //===-- llvm/Target/TargetLibraryInfo.h - Library information ---*- C++ -*-===//
      2 //
      3 //                     The LLVM Compiler Infrastructure
      4 //
      5 // This file is distributed under the University of Illinois Open Source
      6 // License. See LICENSE.TXT for details.
      7 //
      8 //===----------------------------------------------------------------------===//
      9 
     10 #ifndef LLVM_TARGET_TARGETLIBRARYINFO_H
     11 #define LLVM_TARGET_TARGETLIBRARYINFO_H
     12 
     13 #include "llvm/ADT/DenseMap.h"
     14 #include "llvm/Pass.h"
     15 
     16 // BEGIN ANDROID-SPECIFIC
     17 #ifdef WIN32
     18 #ifdef fseeko
     19 #undef fseeko
     20 #endif
     21 #ifdef ftello
     22 #undef ftello
     23 #endif
     24 #endif  // WIN32
     25 // END ANDROID-SPECIFIC
     26 
     27 namespace llvm {
     28   class Triple;
     29 
     30   namespace LibFunc {
     31     enum Func {
     32       /// int _IO_getc(_IO_FILE * __fp);
     33       under_IO_getc,
     34       /// int _IO_putc(int __c, _IO_FILE * __fp);
     35       under_IO_putc,
     36       /// void operator delete[](void*);
     37       ZdaPv,
     38       /// void operator delete[](void*, nothrow);
     39       ZdaPvRKSt9nothrow_t,
     40       /// void operator delete(void*);
     41       ZdlPv,
     42       /// void operator delete(void*, nothrow);
     43       ZdlPvRKSt9nothrow_t,
     44       /// void *new[](unsigned int);
     45       Znaj,
     46       /// void *new[](unsigned int, nothrow);
     47       ZnajRKSt9nothrow_t,
     48       /// void *new[](unsigned long);
     49       Znam,
     50       /// void *new[](unsigned long, nothrow);
     51       ZnamRKSt9nothrow_t,
     52       /// void *new(unsigned int);
     53       Znwj,
     54       /// void *new(unsigned int, nothrow);
     55       ZnwjRKSt9nothrow_t,
     56       /// void *new(unsigned long);
     57       Znwm,
     58       /// void *new(unsigned long, nothrow);
     59       ZnwmRKSt9nothrow_t,
     60       /// double __cospi(double x);
     61       cospi,
     62       /// float __cospif(float x);
     63       cospif,
     64       /// int __cxa_atexit(void (*f)(void *), void *p, void *d);
     65       cxa_atexit,
     66       /// void __cxa_guard_abort(guard_t *guard);
     67       /// guard_t is int64_t in Itanium ABI or int32_t on ARM eabi.
     68       cxa_guard_abort,
     69       /// int __cxa_guard_acquire(guard_t *guard);
     70       cxa_guard_acquire,
     71       /// void __cxa_guard_release(guard_t *guard);
     72       cxa_guard_release,
     73       /// int __isoc99_scanf (const char *format, ...)
     74       dunder_isoc99_scanf,
     75       /// int __isoc99_sscanf(const char *s, const char *format, ...)
     76       dunder_isoc99_sscanf,
     77       /// void *__memcpy_chk(void *s1, const void *s2, size_t n, size_t s1size);
     78       memcpy_chk,
     79       /// double __sincospi_stret(double x);
     80       sincospi_stret,
     81       /// float __sincospif_stret(float x);
     82       sincospif_stret,
     83       /// double __sinpi(double x);
     84       sinpi,
     85       /// float __sinpif(float x);
     86       sinpif,
     87       /// double __sqrt_finite(double x);
     88       sqrt_finite,
     89       /// float __sqrt_finite(float x);
     90       sqrtf_finite,
     91       /// long double __sqrt_finite(long double x);
     92       sqrtl_finite,
     93       /// char * __strdup(const char *s);
     94       dunder_strdup,
     95       /// char *__strndup(const char *s, size_t n);
     96       dunder_strndup,
     97       /// char * __strtok_r(char *s, const char *delim, char **save_ptr);
     98       dunder_strtok_r,
     99       /// int abs(int j);
    100       abs,
    101       /// int access(const char *path, int amode);
    102       access,
    103       /// double acos(double x);
    104       acos,
    105       /// float acosf(float x);
    106       acosf,
    107       /// double acosh(double x);
    108       acosh,
    109       /// float acoshf(float x);
    110       acoshf,
    111       /// long double acoshl(long double x);
    112       acoshl,
    113       /// long double acosl(long double x);
    114       acosl,
    115       /// double asin(double x);
    116       asin,
    117       /// float asinf(float x);
    118       asinf,
    119       /// double asinh(double x);
    120       asinh,
    121       /// float asinhf(float x);
    122       asinhf,
    123       /// long double asinhl(long double x);
    124       asinhl,
    125       /// long double asinl(long double x);
    126       asinl,
    127       /// double atan(double x);
    128       atan,
    129       /// double atan2(double y, double x);
    130       atan2,
    131       /// float atan2f(float y, float x);
    132       atan2f,
    133       /// long double atan2l(long double y, long double x);
    134       atan2l,
    135       /// float atanf(float x);
    136       atanf,
    137       /// double atanh(double x);
    138       atanh,
    139       /// float atanhf(float x);
    140       atanhf,
    141       /// long double atanhl(long double x);
    142       atanhl,
    143       /// long double atanl(long double x);
    144       atanl,
    145       /// double atof(const char *str);
    146       atof,
    147       /// int atoi(const char *str);
    148       atoi,
    149       /// long atol(const char *str);
    150       atol,
    151       /// long long atoll(const char *nptr);
    152       atoll,
    153       /// int bcmp(const void *s1, const void *s2, size_t n);
    154       bcmp,
    155       /// void bcopy(const void *s1, void *s2, size_t n);
    156       bcopy,
    157       /// void bzero(void *s, size_t n);
    158       bzero,
    159       /// void *calloc(size_t count, size_t size);
    160       calloc,
    161       /// double cbrt(double x);
    162       cbrt,
    163       /// float cbrtf(float x);
    164       cbrtf,
    165       /// long double cbrtl(long double x);
    166       cbrtl,
    167       /// double ceil(double x);
    168       ceil,
    169       /// float ceilf(float x);
    170       ceilf,
    171       /// long double ceill(long double x);
    172       ceill,
    173       /// int chmod(const char *path, mode_t mode);
    174       chmod,
    175       /// int chown(const char *path, uid_t owner, gid_t group);
    176       chown,
    177       /// void clearerr(FILE *stream);
    178       clearerr,
    179       /// int closedir(DIR *dirp);
    180       closedir,
    181       /// double copysign(double x, double y);
    182       copysign,
    183       /// float copysignf(float x, float y);
    184       copysignf,
    185       /// long double copysignl(long double x, long double y);
    186       copysignl,
    187       /// double cos(double x);
    188       cos,
    189       /// float cosf(float x);
    190       cosf,
    191       /// double cosh(double x);
    192       cosh,
    193       /// float coshf(float x);
    194       coshf,
    195       /// long double coshl(long double x);
    196       coshl,
    197       /// long double cosl(long double x);
    198       cosl,
    199       /// char *ctermid(char *s);
    200       ctermid,
    201       /// double exp(double x);
    202       exp,
    203       /// double exp10(double x);
    204       exp10,
    205       /// float exp10f(float x);
    206       exp10f,
    207       /// long double exp10l(long double x);
    208       exp10l,
    209       /// double exp2(double x);
    210       exp2,
    211       /// float exp2f(float x);
    212       exp2f,
    213       /// long double exp2l(long double x);
    214       exp2l,
    215       /// float expf(float x);
    216       expf,
    217       /// long double expl(long double x);
    218       expl,
    219       /// double expm1(double x);
    220       expm1,
    221       /// float expm1f(float x);
    222       expm1f,
    223       /// long double expm1l(long double x);
    224       expm1l,
    225       /// double fabs(double x);
    226       fabs,
    227       /// float fabsf(float x);
    228       fabsf,
    229       /// long double fabsl(long double x);
    230       fabsl,
    231       /// int fclose(FILE *stream);
    232       fclose,
    233       /// FILE *fdopen(int fildes, const char *mode);
    234       fdopen,
    235       /// int feof(FILE *stream);
    236       feof,
    237       /// int ferror(FILE *stream);
    238       ferror,
    239       /// int fflush(FILE *stream);
    240       fflush,
    241       /// int ffs(int i);
    242       ffs,
    243       /// int ffsl(long int i);
    244       ffsl,
    245       /// int ffsll(long long int i);
    246       ffsll,
    247       /// int fgetc(FILE *stream);
    248       fgetc,
    249       /// int fgetpos(FILE *stream, fpos_t *pos);
    250       fgetpos,
    251       /// char *fgets(char *s, int n, FILE *stream);
    252       fgets,
    253       /// int fileno(FILE *stream);
    254       fileno,
    255       /// int fiprintf(FILE *stream, const char *format, ...);
    256       fiprintf,
    257       /// void flockfile(FILE *file);
    258       flockfile,
    259       /// double floor(double x);
    260       floor,
    261       /// float floorf(float x);
    262       floorf,
    263       /// long double floorl(long double x);
    264       floorl,
    265       /// double fmax(double x, double y);
    266       fmax,
    267       /// float fmaxf(float x, float y);
    268       fmaxf,
    269       /// long double fmaxl(long double x, long double y);
    270       fmaxl,
    271       /// double fmin(double x, double y);
    272       fmin,
    273       /// float fminf(float x, float y);
    274       fminf,
    275       /// long double fminl(long double x, long double y);
    276       fminl,
    277       /// double fmod(double x, double y);
    278       fmod,
    279       /// float fmodf(float x, float y);
    280       fmodf,
    281       /// long double fmodl(long double x, long double y);
    282       fmodl,
    283       /// FILE *fopen(const char *filename, const char *mode);
    284       fopen,
    285       /// FILE *fopen64(const char *filename, const char *opentype)
    286       fopen64,
    287       /// int fprintf(FILE *stream, const char *format, ...);
    288       fprintf,
    289       /// int fputc(int c, FILE *stream);
    290       fputc,
    291       /// int fputs(const char *s, FILE *stream);
    292       fputs,
    293       /// size_t fread(void *ptr, size_t size, size_t nitems, FILE *stream);
    294       fread,
    295       /// void free(void *ptr);
    296       free,
    297       /// double frexp(double num, int *exp);
    298       frexp,
    299       /// float frexpf(float num, int *exp);
    300       frexpf,
    301       /// long double frexpl(long double num, int *exp);
    302       frexpl,
    303       /// int fscanf(FILE *stream, const char *format, ... );
    304       fscanf,
    305       /// int fseek(FILE *stream, long offset, int whence);
    306       fseek,
    307       /// int fseeko(FILE *stream, off_t offset, int whence);
    308       fseeko,
    309       /// int fseeko64(FILE *stream, off64_t offset, int whence)
    310       fseeko64,
    311       /// int fsetpos(FILE *stream, const fpos_t *pos);
    312       fsetpos,
    313       /// int fstat(int fildes, struct stat *buf);
    314       fstat,
    315       /// int fstat64(int filedes, struct stat64 *buf)
    316       fstat64,
    317       /// int fstatvfs(int fildes, struct statvfs *buf);
    318       fstatvfs,
    319       /// int fstatvfs64(int fildes, struct statvfs64 *buf);
    320       fstatvfs64,
    321       /// long ftell(FILE *stream);
    322       ftell,
    323       /// off_t ftello(FILE *stream);
    324       ftello,
    325       /// off64_t ftello64(FILE *stream)
    326       ftello64,
    327       /// int ftrylockfile(FILE *file);
    328       ftrylockfile,
    329       /// void funlockfile(FILE *file);
    330       funlockfile,
    331       /// size_t fwrite(const void *ptr, size_t size, size_t nitems,
    332       /// FILE *stream);
    333       fwrite,
    334       /// int getc(FILE *stream);
    335       getc,
    336       /// int getc_unlocked(FILE *stream);
    337       getc_unlocked,
    338       /// int getchar(void);
    339       getchar,
    340       /// char *getenv(const char *name);
    341       getenv,
    342       /// int getitimer(int which, struct itimerval *value);
    343       getitimer,
    344       /// int getlogin_r(char *name, size_t namesize);
    345       getlogin_r,
    346       /// struct passwd *getpwnam(const char *name);
    347       getpwnam,
    348       /// char *gets(char *s);
    349       gets,
    350       /// int gettimeofday(struct timeval *tp, void *tzp);
    351       gettimeofday,
    352       /// uint32_t htonl(uint32_t hostlong);
    353       htonl,
    354       /// uint16_t htons(uint16_t hostshort);
    355       htons,
    356       /// int iprintf(const char *format, ...);
    357       iprintf,
    358       /// int isascii(int c);
    359       isascii,
    360       /// int isdigit(int c);
    361       isdigit,
    362       /// long int labs(long int j);
    363       labs,
    364       /// int lchown(const char *path, uid_t owner, gid_t group);
    365       lchown,
    366       /// double ldexp(double x, int n);
    367       ldexp,
    368       /// float ldexpf(float x, int n);
    369       ldexpf,
    370       /// long double ldexpl(long double x, int n);
    371       ldexpl,
    372       /// long long int llabs(long long int j);
    373       llabs,
    374       /// double log(double x);
    375       log,
    376       /// double log10(double x);
    377       log10,
    378       /// float log10f(float x);
    379       log10f,
    380       /// long double log10l(long double x);
    381       log10l,
    382       /// double log1p(double x);
    383       log1p,
    384       /// float log1pf(float x);
    385       log1pf,
    386       /// long double log1pl(long double x);
    387       log1pl,
    388       /// double log2(double x);
    389       log2,
    390       /// float log2f(float x);
    391       log2f,
    392       /// double long double log2l(long double x);
    393       log2l,
    394       /// double logb(double x);
    395       logb,
    396       /// float logbf(float x);
    397       logbf,
    398       /// long double logbl(long double x);
    399       logbl,
    400       /// float logf(float x);
    401       logf,
    402       /// long double logl(long double x);
    403       logl,
    404       /// int lstat(const char *path, struct stat *buf);
    405       lstat,
    406       /// int lstat64(const char *path, struct stat64 *buf);
    407       lstat64,
    408       /// void *malloc(size_t size);
    409       malloc,
    410       /// void *memalign(size_t boundary, size_t size);
    411       memalign,
    412       /// void *memccpy(void *s1, const void *s2, int c, size_t n);
    413       memccpy,
    414       /// void *memchr(const void *s, int c, size_t n);
    415       memchr,
    416       /// int memcmp(const void *s1, const void *s2, size_t n);
    417       memcmp,
    418       /// void *memcpy(void *s1, const void *s2, size_t n);
    419       memcpy,
    420       /// void *memmove(void *s1, const void *s2, size_t n);
    421       memmove,
    422       // void *memrchr(const void *s, int c, size_t n);
    423       memrchr,
    424       /// void *memset(void *b, int c, size_t len);
    425       memset,
    426       /// void memset_pattern16(void *b, const void *pattern16, size_t len);
    427       memset_pattern16,
    428       /// int mkdir(const char *path, mode_t mode);
    429       mkdir,
    430       /// time_t mktime(struct tm *timeptr);
    431       mktime,
    432       /// double modf(double x, double *iptr);
    433       modf,
    434       /// float modff(float, float *iptr);
    435       modff,
    436       /// long double modfl(long double value, long double *iptr);
    437       modfl,
    438       /// double nearbyint(double x);
    439       nearbyint,
    440       /// float nearbyintf(float x);
    441       nearbyintf,
    442       /// long double nearbyintl(long double x);
    443       nearbyintl,
    444       /// uint32_t ntohl(uint32_t netlong);
    445       ntohl,
    446       /// uint16_t ntohs(uint16_t netshort);
    447       ntohs,
    448       /// int open(const char *path, int oflag, ... );
    449       open,
    450       /// int open64(const char *filename, int flags[, mode_t mode])
    451       open64,
    452       /// DIR *opendir(const char *dirname);
    453       opendir,
    454       /// int pclose(FILE *stream);
    455       pclose,
    456       /// void perror(const char *s);
    457       perror,
    458       /// FILE *popen(const char *command, const char *mode);
    459       popen,
    460       /// int posix_memalign(void **memptr, size_t alignment, size_t size);
    461       posix_memalign,
    462       /// double pow(double x, double y);
    463       pow,
    464       /// float powf(float x, float y);
    465       powf,
    466       /// long double powl(long double x, long double y);
    467       powl,
    468       /// ssize_t pread(int fildes, void *buf, size_t nbyte, off_t offset);
    469       pread,
    470       /// int printf(const char *format, ...);
    471       printf,
    472       /// int putc(int c, FILE *stream);
    473       putc,
    474       /// int putchar(int c);
    475       putchar,
    476       /// int puts(const char *s);
    477       puts,
    478       /// ssize_t pwrite(int fildes, const void *buf, size_t nbyte,
    479       ///                off_t offset);
    480       pwrite,
    481       /// void qsort(void *base, size_t nel, size_t width,
    482       ///            int (*compar)(const void *, const void *));
    483       qsort,
    484       /// ssize_t read(int fildes, void *buf, size_t nbyte);
    485       read,
    486       /// ssize_t readlink(const char *path, char *buf, size_t bufsize);
    487       readlink,
    488       /// void *realloc(void *ptr, size_t size);
    489       realloc,
    490       /// void *reallocf(void *ptr, size_t size);
    491       reallocf,
    492       /// char *realpath(const char *file_name, char *resolved_name);
    493       realpath,
    494       /// int remove(const char *path);
    495       remove,
    496       /// int rename(const char *old, const char *new);
    497       rename,
    498       /// void rewind(FILE *stream);
    499       rewind,
    500       /// double rint(double x);
    501       rint,
    502       /// float rintf(float x);
    503       rintf,
    504       /// long double rintl(long double x);
    505       rintl,
    506       /// int rmdir(const char *path);
    507       rmdir,
    508       /// double round(double x);
    509       round,
    510       /// float roundf(float x);
    511       roundf,
    512       /// long double roundl(long double x);
    513       roundl,
    514       /// int scanf(const char *restrict format, ... );
    515       scanf,
    516       /// void setbuf(FILE *stream, char *buf);
    517       setbuf,
    518       /// int setitimer(int which, const struct itimerval *value,
    519       ///               struct itimerval *ovalue);
    520       setitimer,
    521       /// int setvbuf(FILE *stream, char *buf, int type, size_t size);
    522       setvbuf,
    523       /// double sin(double x);
    524       sin,
    525       /// float sinf(float x);
    526       sinf,
    527       /// double sinh(double x);
    528       sinh,
    529       /// float sinhf(float x);
    530       sinhf,
    531       /// long double sinhl(long double x);
    532       sinhl,
    533       /// long double sinl(long double x);
    534       sinl,
    535       /// int siprintf(char *str, const char *format, ...);
    536       siprintf,
    537       /// int snprintf(char *s, size_t n, const char *format, ...);
    538       snprintf,
    539       /// int sprintf(char *str, const char *format, ...);
    540       sprintf,
    541       /// double sqrt(double x);
    542       sqrt,
    543       /// float sqrtf(float x);
    544       sqrtf,
    545       /// long double sqrtl(long double x);
    546       sqrtl,
    547       /// int sscanf(const char *s, const char *format, ... );
    548       sscanf,
    549       /// int stat(const char *path, struct stat *buf);
    550       stat,
    551       /// int stat64(const char *path, struct stat64 *buf);
    552       stat64,
    553       /// int statvfs(const char *path, struct statvfs *buf);
    554       statvfs,
    555       /// int statvfs64(const char *path, struct statvfs64 *buf)
    556       statvfs64,
    557       /// char *stpcpy(char *s1, const char *s2);
    558       stpcpy,
    559       /// char *stpncpy(char *s1, const char *s2, size_t n);
    560       stpncpy,
    561       /// int strcasecmp(const char *s1, const char *s2);
    562       strcasecmp,
    563       /// char *strcat(char *s1, const char *s2);
    564       strcat,
    565       /// char *strchr(const char *s, int c);
    566       strchr,
    567       /// int strcmp(const char *s1, const char *s2);
    568       strcmp,
    569       /// int strcoll(const char *s1, const char *s2);
    570       strcoll,
    571       /// char *strcpy(char *s1, const char *s2);
    572       strcpy,
    573       /// size_t strcspn(const char *s1, const char *s2);
    574       strcspn,
    575       /// char *strdup(const char *s1);
    576       strdup,
    577       /// size_t strlen(const char *s);
    578       strlen,
    579       /// int strncasecmp(const char *s1, const char *s2, size_t n);
    580       strncasecmp,
    581       /// char *strncat(char *s1, const char *s2, size_t n);
    582       strncat,
    583       /// int strncmp(const char *s1, const char *s2, size_t n);
    584       strncmp,
    585       /// char *strncpy(char *s1, const char *s2, size_t n);
    586       strncpy,
    587       /// char *strndup(const char *s1, size_t n);
    588       strndup,
    589       /// size_t strnlen(const char *s, size_t maxlen);
    590       strnlen,
    591       /// char *strpbrk(const char *s1, const char *s2);
    592       strpbrk,
    593       /// char *strrchr(const char *s, int c);
    594       strrchr,
    595       /// size_t strspn(const char *s1, const char *s2);
    596       strspn,
    597       /// char *strstr(const char *s1, const char *s2);
    598       strstr,
    599       /// double strtod(const char *nptr, char **endptr);
    600       strtod,
    601       /// float strtof(const char *nptr, char **endptr);
    602       strtof,
    603       // char *strtok(char *s1, const char *s2);
    604       strtok,
    605       // char *strtok_r(char *s, const char *sep, char **lasts);
    606       strtok_r,
    607       /// long int strtol(const char *nptr, char **endptr, int base);
    608       strtol,
    609       /// long double strtold(const char *nptr, char **endptr);
    610       strtold,
    611       /// long long int strtoll(const char *nptr, char **endptr, int base);
    612       strtoll,
    613       /// unsigned long int strtoul(const char *nptr, char **endptr, int base);
    614       strtoul,
    615       /// unsigned long long int strtoull(const char *nptr, char **endptr,
    616       ///                                 int base);
    617       strtoull,
    618       /// size_t strxfrm(char *s1, const char *s2, size_t n);
    619       strxfrm,
    620       /// int system(const char *command);
    621       system,
    622       /// double tan(double x);
    623       tan,
    624       /// float tanf(float x);
    625       tanf,
    626       /// double tanh(double x);
    627       tanh,
    628       /// float tanhf(float x);
    629       tanhf,
    630       /// long double tanhl(long double x);
    631       tanhl,
    632       /// long double tanl(long double x);
    633       tanl,
    634       /// clock_t times(struct tms *buffer);
    635       times,
    636       /// FILE *tmpfile(void);
    637       tmpfile,
    638       /// FILE *tmpfile64(void)
    639       tmpfile64,
    640       /// int toascii(int c);
    641       toascii,
    642       /// double trunc(double x);
    643       trunc,
    644       /// float truncf(float x);
    645       truncf,
    646       /// long double truncl(long double x);
    647       truncl,
    648       /// int uname(struct utsname *name);
    649       uname,
    650       /// int ungetc(int c, FILE *stream);
    651       ungetc,
    652       /// int unlink(const char *path);
    653       unlink,
    654       /// int unsetenv(const char *name);
    655       unsetenv,
    656       /// int utime(const char *path, const struct utimbuf *times);
    657       utime,
    658       /// int utimes(const char *path, const struct timeval times[2]);
    659       utimes,
    660       /// void *valloc(size_t size);
    661       valloc,
    662       /// int vfprintf(FILE *stream, const char *format, va_list ap);
    663       vfprintf,
    664       /// int vfscanf(FILE *stream, const char *format, va_list arg);
    665       vfscanf,
    666       /// int vprintf(const char *restrict format, va_list ap);
    667       vprintf,
    668       /// int vscanf(const char *format, va_list arg);
    669       vscanf,
    670       /// int vsnprintf(char *s, size_t n, const char *format, va_list ap);
    671       vsnprintf,
    672       /// int vsprintf(char *s, const char *format, va_list ap);
    673       vsprintf,
    674       /// int vsscanf(const char *s, const char *format, va_list arg);
    675       vsscanf,
    676       /// ssize_t write(int fildes, const void *buf, size_t nbyte);
    677       write,
    678 
    679       NumLibFuncs
    680     };
    681   }
    682 
    683 /// TargetLibraryInfo - This immutable pass captures information about what
    684 /// library functions are available for the current target, and allows a
    685 /// frontend to disable optimizations through -fno-builtin etc.
    686 class TargetLibraryInfo : public ImmutablePass {
    687   virtual void anchor();
    688   unsigned char AvailableArray[(LibFunc::NumLibFuncs+3)/4];
    689   llvm::DenseMap<unsigned, std::string> CustomNames;
    690   static const char* StandardNames[LibFunc::NumLibFuncs];
    691 
    692   enum AvailabilityState {
    693     StandardName = 3, // (memset to all ones)
    694     CustomName = 1,
    695     Unavailable = 0  // (memset to all zeros)
    696   };
    697   void setState(LibFunc::Func F, AvailabilityState State) {
    698     AvailableArray[F/4] &= ~(3 << 2*(F&3));
    699     AvailableArray[F/4] |= State << 2*(F&3);
    700   }
    701   AvailabilityState getState(LibFunc::Func F) const {
    702     return static_cast<AvailabilityState>((AvailableArray[F/4] >> 2*(F&3)) & 3);
    703   }
    704 
    705 public:
    706   static char ID;
    707   TargetLibraryInfo();
    708   TargetLibraryInfo(const Triple &T);
    709   explicit TargetLibraryInfo(const TargetLibraryInfo &TLI);
    710 
    711   /// getLibFunc - Search for a particular function name.  If it is one of the
    712   /// known library functions, return true and set F to the corresponding value.
    713   bool getLibFunc(StringRef funcName, LibFunc::Func &F) const;
    714 
    715   /// has - This function is used by optimizations that want to match on or form
    716   /// a given library function.
    717   bool has(LibFunc::Func F) const {
    718     return getState(F) != Unavailable;
    719   }
    720 
    721   /// hasOptimizedCodeGen - Return true if the function is both available as
    722   /// a builtin and a candidate for optimized code generation.
    723   bool hasOptimizedCodeGen(LibFunc::Func F) const {
    724     if (getState(F) == Unavailable)
    725       return false;
    726     switch (F) {
    727     default: break;
    728     case LibFunc::copysign:  case LibFunc::copysignf:  case LibFunc::copysignl:
    729     case LibFunc::fabs:      case LibFunc::fabsf:      case LibFunc::fabsl:
    730     case LibFunc::sin:       case LibFunc::sinf:       case LibFunc::sinl:
    731     case LibFunc::cos:       case LibFunc::cosf:       case LibFunc::cosl:
    732     case LibFunc::sqrt:      case LibFunc::sqrtf:      case LibFunc::sqrtl:
    733     case LibFunc::sqrt_finite: case LibFunc::sqrtf_finite:
    734                                                   case LibFunc::sqrtl_finite:
    735     case LibFunc::fmax:      case LibFunc::fmaxf:      case LibFunc::fmaxl:
    736     case LibFunc::fmin:      case LibFunc::fminf:      case LibFunc::fminl:
    737     case LibFunc::floor:     case LibFunc::floorf:     case LibFunc::floorl:
    738     case LibFunc::nearbyint: case LibFunc::nearbyintf: case LibFunc::nearbyintl:
    739     case LibFunc::ceil:      case LibFunc::ceilf:      case LibFunc::ceill:
    740     case LibFunc::rint:      case LibFunc::rintf:      case LibFunc::rintl:
    741     case LibFunc::round:     case LibFunc::roundf:     case LibFunc::roundl:
    742     case LibFunc::trunc:     case LibFunc::truncf:     case LibFunc::truncl:
    743     case LibFunc::log2:      case LibFunc::log2f:      case LibFunc::log2l:
    744     case LibFunc::exp2:      case LibFunc::exp2f:      case LibFunc::exp2l:
    745     case LibFunc::memcmp:    case LibFunc::strcmp:     case LibFunc::strcpy:
    746     case LibFunc::stpcpy:    case LibFunc::strlen:     case LibFunc::strnlen:
    747     case LibFunc::memchr:
    748       return true;
    749     }
    750     return false;
    751   }
    752 
    753   StringRef getName(LibFunc::Func F) const {
    754     AvailabilityState State = getState(F);
    755     if (State == Unavailable)
    756       return StringRef();
    757     if (State == StandardName)
    758       return StandardNames[F];
    759     assert(State == CustomName);
    760     return CustomNames.find(F)->second;
    761   }
    762 
    763   /// setUnavailable - this can be used by whatever sets up TargetLibraryInfo to
    764   /// ban use of specific library functions.
    765   void setUnavailable(LibFunc::Func F) {
    766     setState(F, Unavailable);
    767   }
    768 
    769   void setAvailable(LibFunc::Func F) {
    770     setState(F, StandardName);
    771   }
    772 
    773   void setAvailableWithName(LibFunc::Func F, StringRef Name) {
    774     if (StandardNames[F] != Name) {
    775       setState(F, CustomName);
    776       CustomNames[F] = Name;
    777       assert(CustomNames.find(F) != CustomNames.end());
    778     } else {
    779       setState(F, StandardName);
    780     }
    781   }
    782 
    783   /// disableAllFunctions - This disables all builtins, which is used for
    784   /// options like -fno-builtin.
    785   void disableAllFunctions();
    786 };
    787 
    788 } // end namespace llvm
    789 
    790 #endif
    791