TargetLibraryInfo.h revision 208130f11331eccab26c0a6f3146cd1891e53e33
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
16namespace llvm {
17  class Triple;
18
19  namespace LibFunc {
20    enum Func {
21      /// int _IO_getc(_IO_FILE * __fp);
22      under_IO_getc,
23      /// int _IO_putc(int __c, _IO_FILE * __fp);
24      under_IO_putc,
25      /// void operator delete[](void*);
26      ZdaPv,
27      /// void operator delete[](void*, nothrow);
28      ZdaPvRKSt9nothrow_t,
29      /// void operator delete(void*);
30      ZdlPv,
31      /// void operator delete(void*, nothrow);
32      ZdlPvRKSt9nothrow_t,
33      /// void *new[](unsigned int);
34      Znaj,
35      /// void *new[](unsigned int, nothrow);
36      ZnajRKSt9nothrow_t,
37      /// void *new[](unsigned long);
38      Znam,
39      /// void *new[](unsigned long, nothrow);
40      ZnamRKSt9nothrow_t,
41      /// void *new(unsigned int);
42      Znwj,
43      /// void *new(unsigned int, nothrow);
44      ZnwjRKSt9nothrow_t,
45      /// void *new(unsigned long);
46      Znwm,
47      /// void *new(unsigned long, nothrow);
48      ZnwmRKSt9nothrow_t,
49      /// double __cospi(double x);
50      cospi,
51      /// float __cospif(float x);
52      cospif,
53      /// int __cxa_atexit(void (*f)(void *), void *p, void *d);
54      cxa_atexit,
55      /// void __cxa_guard_abort(guard_t *guard);
56      /// guard_t is int64_t in Itanium ABI or int32_t on ARM eabi.
57      cxa_guard_abort,
58      /// int __cxa_guard_acquire(guard_t *guard);
59      cxa_guard_acquire,
60      /// void __cxa_guard_release(guard_t *guard);
61      cxa_guard_release,
62      /// int __isoc99_scanf (const char *format, ...)
63      dunder_isoc99_scanf,
64      /// int __isoc99_sscanf(const char *s, const char *format, ...)
65      dunder_isoc99_sscanf,
66      /// void *__memcpy_chk(void *s1, const void *s2, size_t n, size_t s1size);
67      memcpy_chk,
68      /// double __sincospi_stret(double x);
69      sincospi_stret,
70      /// float __sincospi_stretf(float x);
71      sincospi_stretf,
72      /// double __sinpi(double x);
73      sinpi,
74      /// float __sinpif(float x);
75      sinpif,
76      /// double __sqrt_finite(double x);
77      sqrt_finite,
78      /// float __sqrt_finite(float x);
79      sqrtf_finite,
80      /// long double __sqrt_finite(long double x);
81      sqrtl_finite,
82      /// char * __strdup(const char *s);
83      dunder_strdup,
84      /// char *__strndup(const char *s, size_t n);
85      dunder_strndup,
86      /// char * __strtok_r(char *s, const char *delim, char **save_ptr);
87      dunder_strtok_r,
88      /// int abs(int j);
89      abs,
90      /// int access(const char *path, int amode);
91      access,
92      /// double acos(double x);
93      acos,
94      /// float acosf(float x);
95      acosf,
96      /// double acosh(double x);
97      acosh,
98      /// float acoshf(float x);
99      acoshf,
100      /// long double acoshl(long double x);
101      acoshl,
102      /// long double acosl(long double x);
103      acosl,
104      /// double asin(double x);
105      asin,
106      /// float asinf(float x);
107      asinf,
108      /// double asinh(double x);
109      asinh,
110      /// float asinhf(float x);
111      asinhf,
112      /// long double asinhl(long double x);
113      asinhl,
114      /// long double asinl(long double x);
115      asinl,
116      /// double atan(double x);
117      atan,
118      /// double atan2(double y, double x);
119      atan2,
120      /// float atan2f(float y, float x);
121      atan2f,
122      /// long double atan2l(long double y, long double x);
123      atan2l,
124      /// float atanf(float x);
125      atanf,
126      /// double atanh(double x);
127      atanh,
128      /// float atanhf(float x);
129      atanhf,
130      /// long double atanhl(long double x);
131      atanhl,
132      /// long double atanl(long double x);
133      atanl,
134      /// double atof(const char *str);
135      atof,
136      /// int atoi(const char *str);
137      atoi,
138      /// long atol(const char *str);
139      atol,
140      /// long long atoll(const char *nptr);
141      atoll,
142      /// int bcmp(const void *s1, const void *s2, size_t n);
143      bcmp,
144      /// void bcopy(const void *s1, void *s2, size_t n);
145      bcopy,
146      /// void bzero(void *s, size_t n);
147      bzero,
148      /// void *calloc(size_t count, size_t size);
149      calloc,
150      /// double cbrt(double x);
151      cbrt,
152      /// float cbrtf(float x);
153      cbrtf,
154      /// long double cbrtl(long double x);
155      cbrtl,
156      /// double ceil(double x);
157      ceil,
158      /// float ceilf(float x);
159      ceilf,
160      /// long double ceill(long double x);
161      ceill,
162      /// int chmod(const char *path, mode_t mode);
163      chmod,
164      /// int chown(const char *path, uid_t owner, gid_t group);
165      chown,
166      /// void clearerr(FILE *stream);
167      clearerr,
168      /// int closedir(DIR *dirp);
169      closedir,
170      /// double copysign(double x, double y);
171      copysign,
172      /// float copysignf(float x, float y);
173      copysignf,
174      /// long double copysignl(long double x, long double y);
175      copysignl,
176      /// double cos(double x);
177      cos,
178      /// float cosf(float x);
179      cosf,
180      /// double cosh(double x);
181      cosh,
182      /// float coshf(float x);
183      coshf,
184      /// long double coshl(long double x);
185      coshl,
186      /// long double cosl(long double x);
187      cosl,
188      /// char *ctermid(char *s);
189      ctermid,
190      /// double exp(double x);
191      exp,
192      /// double exp10(double x);
193      exp10,
194      /// float exp10f(float x);
195      exp10f,
196      /// long double exp10l(long double x);
197      exp10l,
198      /// double exp2(double x);
199      exp2,
200      /// float exp2f(float x);
201      exp2f,
202      /// long double exp2l(long double x);
203      exp2l,
204      /// float expf(float x);
205      expf,
206      /// long double expl(long double x);
207      expl,
208      /// double expm1(double x);
209      expm1,
210      /// float expm1f(float x);
211      expm1f,
212      /// long double expm1l(long double x);
213      expm1l,
214      /// double fabs(double x);
215      fabs,
216      /// float fabsf(float x);
217      fabsf,
218      /// long double fabsl(long double x);
219      fabsl,
220      /// int fclose(FILE *stream);
221      fclose,
222      /// FILE *fdopen(int fildes, const char *mode);
223      fdopen,
224      /// int feof(FILE *stream);
225      feof,
226      /// int ferror(FILE *stream);
227      ferror,
228      /// int fflush(FILE *stream);
229      fflush,
230      /// int ffs(int i);
231      ffs,
232      /// int ffsl(long int i);
233      ffsl,
234      /// int ffsll(long long int i);
235      ffsll,
236      /// int fgetc(FILE *stream);
237      fgetc,
238      /// int fgetpos(FILE *stream, fpos_t *pos);
239      fgetpos,
240      /// char *fgets(char *s, int n, FILE *stream);
241      fgets,
242      /// int fileno(FILE *stream);
243      fileno,
244      /// int fiprintf(FILE *stream, const char *format, ...);
245      fiprintf,
246      /// void flockfile(FILE *file);
247      flockfile,
248      /// double floor(double x);
249      floor,
250      /// float floorf(float x);
251      floorf,
252      /// long double floorl(long double x);
253      floorl,
254      /// double fmod(double x, double y);
255      fmod,
256      /// float fmodf(float x, float y);
257      fmodf,
258      /// long double fmodl(long double x, long double y);
259      fmodl,
260      /// FILE *fopen(const char *filename, const char *mode);
261      fopen,
262      /// FILE *fopen64(const char *filename, const char *opentype)
263      fopen64,
264      /// int fprintf(FILE *stream, const char *format, ...);
265      fprintf,
266      /// int fputc(int c, FILE *stream);
267      fputc,
268      /// int fputs(const char *s, FILE *stream);
269      fputs,
270      /// size_t fread(void *ptr, size_t size, size_t nitems, FILE *stream);
271      fread,
272      /// void free(void *ptr);
273      free,
274      /// double frexp(double num, int *exp);
275      frexp,
276      /// float frexpf(float num, int *exp);
277      frexpf,
278      /// long double frexpl(long double num, int *exp);
279      frexpl,
280      /// int fscanf(FILE *stream, const char *format, ... );
281      fscanf,
282      /// int fseek(FILE *stream, long offset, int whence);
283      fseek,
284      /// int fseeko(FILE *stream, off_t offset, int whence);
285      fseeko,
286      /// int fseeko64(FILE *stream, off64_t offset, int whence)
287      fseeko64,
288      /// int fsetpos(FILE *stream, const fpos_t *pos);
289      fsetpos,
290      /// int fstat(int fildes, struct stat *buf);
291      fstat,
292      /// int fstat64(int filedes, struct stat64 *buf)
293      fstat64,
294      /// int fstatvfs(int fildes, struct statvfs *buf);
295      fstatvfs,
296      /// int fstatvfs64(int fildes, struct statvfs64 *buf);
297      fstatvfs64,
298      /// long ftell(FILE *stream);
299      ftell,
300      /// off_t ftello(FILE *stream);
301      ftello,
302      /// off64_t ftello64(FILE *stream)
303      ftello64,
304      /// int ftrylockfile(FILE *file);
305      ftrylockfile,
306      /// void funlockfile(FILE *file);
307      funlockfile,
308      /// size_t fwrite(const void *ptr, size_t size, size_t nitems,
309      /// FILE *stream);
310      fwrite,
311      /// int getc(FILE *stream);
312      getc,
313      /// int getc_unlocked(FILE *stream);
314      getc_unlocked,
315      /// int getchar(void);
316      getchar,
317      /// char *getenv(const char *name);
318      getenv,
319      /// int getitimer(int which, struct itimerval *value);
320      getitimer,
321      /// int getlogin_r(char *name, size_t namesize);
322      getlogin_r,
323      /// struct passwd *getpwnam(const char *name);
324      getpwnam,
325      /// char *gets(char *s);
326      gets,
327      /// int gettimeofday(struct timeval *tp, void *tzp);
328      gettimeofday,
329      /// uint32_t htonl(uint32_t hostlong);
330      htonl,
331      /// uint16_t htons(uint16_t hostshort);
332      htons,
333      /// int iprintf(const char *format, ...);
334      iprintf,
335      /// int isascii(int c);
336      isascii,
337      /// int isdigit(int c);
338      isdigit,
339      /// long int labs(long int j);
340      labs,
341      /// int lchown(const char *path, uid_t owner, gid_t group);
342      lchown,
343      /// long long int llabs(long long int j);
344      llabs,
345      /// double log(double x);
346      log,
347      /// double log10(double x);
348      log10,
349      /// float log10f(float x);
350      log10f,
351      /// long double log10l(long double x);
352      log10l,
353      /// double log1p(double x);
354      log1p,
355      /// float log1pf(float x);
356      log1pf,
357      /// long double log1pl(long double x);
358      log1pl,
359      /// double log2(double x);
360      log2,
361      /// float log2f(float x);
362      log2f,
363      /// double long double log2l(long double x);
364      log2l,
365      /// double logb(double x);
366      logb,
367      /// float logbf(float x);
368      logbf,
369      /// long double logbl(long double x);
370      logbl,
371      /// float logf(float x);
372      logf,
373      /// long double logl(long double x);
374      logl,
375      /// int lstat(const char *path, struct stat *buf);
376      lstat,
377      /// int lstat64(const char *path, struct stat64 *buf);
378      lstat64,
379      /// void *malloc(size_t size);
380      malloc,
381      /// void *memalign(size_t boundary, size_t size);
382      memalign,
383      /// void *memccpy(void *s1, const void *s2, int c, size_t n);
384      memccpy,
385      /// void *memchr(const void *s, int c, size_t n);
386      memchr,
387      /// int memcmp(const void *s1, const void *s2, size_t n);
388      memcmp,
389      /// void *memcpy(void *s1, const void *s2, size_t n);
390      memcpy,
391      /// void *memmove(void *s1, const void *s2, size_t n);
392      memmove,
393      // void *memrchr(const void *s, int c, size_t n);
394      memrchr,
395      /// void *memset(void *b, int c, size_t len);
396      memset,
397      /// void memset_pattern16(void *b, const void *pattern16, size_t len);
398      memset_pattern16,
399      /// int mkdir(const char *path, mode_t mode);
400      mkdir,
401      /// time_t mktime(struct tm *timeptr);
402      mktime,
403      /// double modf(double x, double *iptr);
404      modf,
405      /// float modff(float, float *iptr);
406      modff,
407      /// long double modfl(long double value, long double *iptr);
408      modfl,
409      /// double nearbyint(double x);
410      nearbyint,
411      /// float nearbyintf(float x);
412      nearbyintf,
413      /// long double nearbyintl(long double x);
414      nearbyintl,
415      /// uint32_t ntohl(uint32_t netlong);
416      ntohl,
417      /// uint16_t ntohs(uint16_t netshort);
418      ntohs,
419      /// int open(const char *path, int oflag, ... );
420      open,
421      /// int open64(const char *filename, int flags[, mode_t mode])
422      open64,
423      /// DIR *opendir(const char *dirname);
424      opendir,
425      /// int pclose(FILE *stream);
426      pclose,
427      /// void perror(const char *s);
428      perror,
429      /// FILE *popen(const char *command, const char *mode);
430      popen,
431      /// int posix_memalign(void **memptr, size_t alignment, size_t size);
432      posix_memalign,
433      /// double pow(double x, double y);
434      pow,
435      /// float powf(float x, float y);
436      powf,
437      /// long double powl(long double x, long double y);
438      powl,
439      /// ssize_t pread(int fildes, void *buf, size_t nbyte, off_t offset);
440      pread,
441      /// int printf(const char *format, ...);
442      printf,
443      /// int putc(int c, FILE *stream);
444      putc,
445      /// int putchar(int c);
446      putchar,
447      /// int puts(const char *s);
448      puts,
449      /// ssize_t pwrite(int fildes, const void *buf, size_t nbyte,
450      ///                off_t offset);
451      pwrite,
452      /// void qsort(void *base, size_t nel, size_t width,
453      ///            int (*compar)(const void *, const void *));
454      qsort,
455      /// ssize_t read(int fildes, void *buf, size_t nbyte);
456      read,
457      /// ssize_t readlink(const char *path, char *buf, size_t bufsize);
458      readlink,
459      /// void *realloc(void *ptr, size_t size);
460      realloc,
461      /// void *reallocf(void *ptr, size_t size);
462      reallocf,
463      /// char *realpath(const char *file_name, char *resolved_name);
464      realpath,
465      /// int remove(const char *path);
466      remove,
467      /// int rename(const char *old, const char *new);
468      rename,
469      /// void rewind(FILE *stream);
470      rewind,
471      /// double rint(double x);
472      rint,
473      /// float rintf(float x);
474      rintf,
475      /// long double rintl(long double x);
476      rintl,
477      /// int rmdir(const char *path);
478      rmdir,
479      /// double round(double x);
480      round,
481      /// float roundf(float x);
482      roundf,
483      /// long double roundl(long double x);
484      roundl,
485      /// int scanf(const char *restrict format, ... );
486      scanf,
487      /// void setbuf(FILE *stream, char *buf);
488      setbuf,
489      /// int setitimer(int which, const struct itimerval *value,
490      ///               struct itimerval *ovalue);
491      setitimer,
492      /// int setvbuf(FILE *stream, char *buf, int type, size_t size);
493      setvbuf,
494      /// double sin(double x);
495      sin,
496      /// float sinf(float x);
497      sinf,
498      /// double sinh(double x);
499      sinh,
500      /// float sinhf(float x);
501      sinhf,
502      /// long double sinhl(long double x);
503      sinhl,
504      /// long double sinl(long double x);
505      sinl,
506      /// int siprintf(char *str, const char *format, ...);
507      siprintf,
508      /// int snprintf(char *s, size_t n, const char *format, ...);
509      snprintf,
510      /// int sprintf(char *str, const char *format, ...);
511      sprintf,
512      /// double sqrt(double x);
513      sqrt,
514      /// float sqrtf(float x);
515      sqrtf,
516      /// long double sqrtl(long double x);
517      sqrtl,
518      /// int sscanf(const char *s, const char *format, ... );
519      sscanf,
520      /// int stat(const char *path, struct stat *buf);
521      stat,
522      /// int stat64(const char *path, struct stat64 *buf);
523      stat64,
524      /// int statvfs(const char *path, struct statvfs *buf);
525      statvfs,
526      /// int statvfs64(const char *path, struct statvfs64 *buf)
527      statvfs64,
528      /// char *stpcpy(char *s1, const char *s2);
529      stpcpy,
530      /// char *stpncpy(char *s1, const char *s2, size_t n);
531      stpncpy,
532      /// int strcasecmp(const char *s1, const char *s2);
533      strcasecmp,
534      /// char *strcat(char *s1, const char *s2);
535      strcat,
536      /// char *strchr(const char *s, int c);
537      strchr,
538      /// int strcmp(const char *s1, const char *s2);
539      strcmp,
540      /// int strcoll(const char *s1, const char *s2);
541      strcoll,
542      /// char *strcpy(char *s1, const char *s2);
543      strcpy,
544      /// size_t strcspn(const char *s1, const char *s2);
545      strcspn,
546      /// char *strdup(const char *s1);
547      strdup,
548      /// size_t strlen(const char *s);
549      strlen,
550      /// int strncasecmp(const char *s1, const char *s2, size_t n);
551      strncasecmp,
552      /// char *strncat(char *s1, const char *s2, size_t n);
553      strncat,
554      /// int strncmp(const char *s1, const char *s2, size_t n);
555      strncmp,
556      /// char *strncpy(char *s1, const char *s2, size_t n);
557      strncpy,
558      /// char *strndup(const char *s1, size_t n);
559      strndup,
560      /// size_t strnlen(const char *s, size_t maxlen);
561      strnlen,
562      /// char *strpbrk(const char *s1, const char *s2);
563      strpbrk,
564      /// char *strrchr(const char *s, int c);
565      strrchr,
566      /// size_t strspn(const char *s1, const char *s2);
567      strspn,
568      /// char *strstr(const char *s1, const char *s2);
569      strstr,
570      /// double strtod(const char *nptr, char **endptr);
571      strtod,
572      /// float strtof(const char *nptr, char **endptr);
573      strtof,
574      // char *strtok(char *s1, const char *s2);
575      strtok,
576      // char *strtok_r(char *s, const char *sep, char **lasts);
577      strtok_r,
578      /// long int strtol(const char *nptr, char **endptr, int base);
579      strtol,
580      /// long double strtold(const char *nptr, char **endptr);
581      strtold,
582      /// long long int strtoll(const char *nptr, char **endptr, int base);
583      strtoll,
584      /// unsigned long int strtoul(const char *nptr, char **endptr, int base);
585      strtoul,
586      /// unsigned long long int strtoull(const char *nptr, char **endptr,
587      ///                                 int base);
588      strtoull,
589      /// size_t strxfrm(char *s1, const char *s2, size_t n);
590      strxfrm,
591      /// int system(const char *command);
592      system,
593      /// double tan(double x);
594      tan,
595      /// float tanf(float x);
596      tanf,
597      /// double tanh(double x);
598      tanh,
599      /// float tanhf(float x);
600      tanhf,
601      /// long double tanhl(long double x);
602      tanhl,
603      /// long double tanl(long double x);
604      tanl,
605      /// clock_t times(struct tms *buffer);
606      times,
607      /// FILE *tmpfile(void);
608      tmpfile,
609      /// FILE *tmpfile64(void)
610      tmpfile64,
611      /// int toascii(int c);
612      toascii,
613      /// double trunc(double x);
614      trunc,
615      /// float truncf(float x);
616      truncf,
617      /// long double truncl(long double x);
618      truncl,
619      /// int uname(struct utsname *name);
620      uname,
621      /// int ungetc(int c, FILE *stream);
622      ungetc,
623      /// int unlink(const char *path);
624      unlink,
625      /// int unsetenv(const char *name);
626      unsetenv,
627      /// int utime(const char *path, const struct utimbuf *times);
628      utime,
629      /// int utimes(const char *path, const struct timeval times[2]);
630      utimes,
631      /// void *valloc(size_t size);
632      valloc,
633      /// int vfprintf(FILE *stream, const char *format, va_list ap);
634      vfprintf,
635      /// int vfscanf(FILE *stream, const char *format, va_list arg);
636      vfscanf,
637      /// int vprintf(const char *restrict format, va_list ap);
638      vprintf,
639      /// int vscanf(const char *format, va_list arg);
640      vscanf,
641      /// int vsnprintf(char *s, size_t n, const char *format, va_list ap);
642      vsnprintf,
643      /// int vsprintf(char *s, const char *format, va_list ap);
644      vsprintf,
645      /// int vsscanf(const char *s, const char *format, va_list arg);
646      vsscanf,
647      /// ssize_t write(int fildes, const void *buf, size_t nbyte);
648      write,
649
650      NumLibFuncs
651    };
652  }
653
654/// TargetLibraryInfo - This immutable pass captures information about what
655/// library functions are available for the current target, and allows a
656/// frontend to disable optimizations through -fno-builtin etc.
657class TargetLibraryInfo : public ImmutablePass {
658  virtual void anchor();
659  unsigned char AvailableArray[(LibFunc::NumLibFuncs+3)/4];
660  llvm::DenseMap<unsigned, std::string> CustomNames;
661  static const char* StandardNames[LibFunc::NumLibFuncs];
662
663  enum AvailabilityState {
664    StandardName = 3, // (memset to all ones)
665    CustomName = 1,
666    Unavailable = 0  // (memset to all zeros)
667  };
668  void setState(LibFunc::Func F, AvailabilityState State) {
669    AvailableArray[F/4] &= ~(3 << 2*(F&3));
670    AvailableArray[F/4] |= State << 2*(F&3);
671  }
672  AvailabilityState getState(LibFunc::Func F) const {
673    return static_cast<AvailabilityState>((AvailableArray[F/4] >> 2*(F&3)) & 3);
674  }
675
676public:
677  static char ID;
678  TargetLibraryInfo();
679  TargetLibraryInfo(const Triple &T);
680  explicit TargetLibraryInfo(const TargetLibraryInfo &TLI);
681
682  /// getLibFunc - Search for a particular function name.  If it is one of the
683  /// known library functions, return true and set F to the corresponding value.
684  bool getLibFunc(StringRef funcName, LibFunc::Func &F) const;
685
686  /// has - This function is used by optimizations that want to match on or form
687  /// a given library function.
688  bool has(LibFunc::Func F) const {
689    return getState(F) != Unavailable;
690  }
691
692  /// hasOptimizedCodeGen - Return true if the function is both available as
693  /// a builtin and a candidate for optimized code generation.
694  bool hasOptimizedCodeGen(LibFunc::Func F) const {
695    if (getState(F) == Unavailable)
696      return false;
697    switch (F) {
698    default: break;
699    case LibFunc::copysign:  case LibFunc::copysignf:  case LibFunc::copysignl:
700    case LibFunc::fabs:      case LibFunc::fabsf:      case LibFunc::fabsl:
701    case LibFunc::sin:       case LibFunc::sinf:       case LibFunc::sinl:
702    case LibFunc::cos:       case LibFunc::cosf:       case LibFunc::cosl:
703    case LibFunc::sqrt:      case LibFunc::sqrtf:      case LibFunc::sqrtl:
704    case LibFunc::sqrt_finite: case LibFunc::sqrtf_finite:
705                                                  case LibFunc::sqrtl_finite:
706    case LibFunc::floor:     case LibFunc::floorf:     case LibFunc::floorl:
707    case LibFunc::nearbyint: case LibFunc::nearbyintf: case LibFunc::nearbyintl:
708    case LibFunc::ceil:      case LibFunc::ceilf:      case LibFunc::ceill:
709    case LibFunc::rint:      case LibFunc::rintf:      case LibFunc::rintl:
710    case LibFunc::round:     case LibFunc::roundf:     case LibFunc::roundl:
711    case LibFunc::trunc:     case LibFunc::truncf:     case LibFunc::truncl:
712    case LibFunc::log2:      case LibFunc::log2f:      case LibFunc::log2l:
713    case LibFunc::exp2:      case LibFunc::exp2f:      case LibFunc::exp2l:
714    case LibFunc::memcmp:    case LibFunc::strcmp:     case LibFunc::strcpy:
715    case LibFunc::stpcpy:    case LibFunc::strlen:     case LibFunc::strnlen:
716    case LibFunc::memchr:
717      return true;
718    }
719    return false;
720  }
721
722  StringRef getName(LibFunc::Func F) const {
723    AvailabilityState State = getState(F);
724    if (State == Unavailable)
725      return StringRef();
726    if (State == StandardName)
727      return StandardNames[F];
728    assert(State == CustomName);
729    return CustomNames.find(F)->second;
730  }
731
732  /// setUnavailable - this can be used by whatever sets up TargetLibraryInfo to
733  /// ban use of specific library functions.
734  void setUnavailable(LibFunc::Func F) {
735    setState(F, Unavailable);
736  }
737
738  void setAvailable(LibFunc::Func F) {
739    setState(F, StandardName);
740  }
741
742  void setAvailableWithName(LibFunc::Func F, StringRef Name) {
743    if (StandardNames[F] != Name) {
744      setState(F, CustomName);
745      CustomNames[F] = Name;
746      assert(CustomNames.find(F) != CustomNames.end());
747    } else {
748      setState(F, StandardName);
749    }
750  }
751
752  /// disableAllFunctions - This disables all builtins, which is used for
753  /// options like -fno-builtin.
754  void disableAllFunctions();
755};
756
757} // end namespace llvm
758
759#endif
760