* target.def (TARGET_LIBC_HAS_FUNCTION): New target hook.
	* builtins.c (default_libc_has_function): New.
	(gnu_libc_has_function): Ditto.
	(no_c99_libc_has_function): Ditto.
	(expand_builtin_cexpi): Using new target hook TARGET_LIBC_HAS_FUNCTION
	instead of TARGET_HAS_SINCOS and TARGET_C99_FUNCTIONS.
	(fold_builtin_sincos): Likewise.
	(fold_builtin_cexp): Likewise.
	* builtins.def (DEF_C94_BUILTIN): Likewise.
	(DEF_C99_BUILTIN): Likewise.
	(DEF_C99_C90RES_BUILTIN): Likewise.
	(DEF_C99_COMPL_BUILTIN): New define. Change all complex c99 builtin
	definitions to using this define.
	* config/darwin-protos.h (darwin_libc_has_function): New.
	* config/darwin.c: (darwin_libc_has_function: Ditto.
	* config/alpha/linux.h: Remove TARGET_C99_FUNCTIONS and
	TARGET_HAS_SINCOS. Redefine TARGET_LIBC_HAS_FUNCTION.
	* config/darwin.h: Ditto.
	* config/elfos.h: Ditto.
	* config/freebsd.h: Ditto.
	* config/i386/cygming.h: Ditto.
	* config/i386/djgpp.h: Ditto.
	* config/i386/i386-interix.h: Ditto.
	* config/microblaze/microblaze.h: Ditto.
	* config/mmix/mmix.h: Ditto.
	* config/gnu-user.h: Ditto.
	* config/ia64/hpux.h: Ditto.
	* config/pa/pa-hpux.h: Ditto.
	* config/pdp11/pdp11.h: Ditto.
	* config/picochip/picochip.h: Ditto.
	* config/linux.h: Ditto.
	* config/netbsd.h: Ditto.
	* config/openbsd.h: Ditto.
	* config/rs6000/aix43.h: Ditto.
	* config/rs6000/aix51.h: Ditto.
	* config/rs6000/aix52.h: Ditto.
	* config/rs6000/aix53.h: Ditto.
	* config/rs6000/aix61.h: Ditto.
	* config/rs6000/darwin.h: Ditto.
	* config/rs6000/linux.h: Ditto.
	* config/rs6000/linux64.h: Ditto.
	* config/s390/tpf.h: Ditto.
	* config/sol2-10.h: Ditto.
	* config/sol2.h: Ditto.
	* config/vms/vms.h: Ditto.
	* config/vxworks.h: Ditto.
	* config/linux-android.c (linux_android_libc_has_function):
	New linux-specific implementation of TARGET_LIBC_HAS_FUNCTION.
	* config/linux-protos.h (linux_android_libc_has_function):
	New declaration.
	* config/i386/i386.c (ix86_libc_has_function): New.
	* config/i386/i386-protos.h
	(ix86_libc_has_function): New declaration.
	* config/i386/i386.md
	("isinfxf2"): Change condition for TARGET_LIBC_HAS_FUNCTION.
	("isinf<mode>2): Likewise.
	* convert.c (convert_to_integer): Using new target hook
	TARGET_LIBC_HAS_FUNCTION istead of TARGET_HAS_SINCOS and
	TARGET_C99_FUNCTIONS.
	* fortran/f95-lang.c (gfc_init_builtin_functions): Ditto.
	* tree-ssa-math-opts.c (execute_cse_sincos): Ditto.
	* coretypes.h (function_class): New enum for different
	classes of functions.
	* defaults.h: Remove TARGET_C99_FUNCTIONS and TARGET_HAS_SINCOS.
	* doc/tm.texi.in (TARGET_C99_FUNCTIONS): Remove documentation.
	(TARGET_HAS_SINCOS): Likewise.
	(TARGET_LIBC_HAS_FUNCTION): New.
	* doc/tm.texi: Regenerated.
	* targhooks.h (default_libc_has_function): New declaration.
	(no_c99_libc_has_function): Ditto.
	(gnu_libc_has_function): Ditto.
	* system.h: Add the poisoning of TARGET_C99_FUNCTIONS
	and TARGET_HAS_SINCOS.

From-SVN: r201838