xtensa.c (xtensa_char_to_class): Delete.

	* config/xtensa/xtensa.c (xtensa_char_to_class): Delete.
	(xtensa_const_ok_for_letter_p): Delete.
	(xtensa_extra_constraint): Delete.
	(override_options): Delete xtensa_char_to_class initialization.
	* config/xtensa/xtensa.h (REG_CLASS_FROM_LETTER): Delete.
	(CONST_OK_FOR_LETTER_P, CONST_DOUBLE_OK_FOR_LETTER_P): Delete.
	(EXTRA_CONSTRAINT): Delete.
	* config/xtensa/xtensa.md: Include constraints.md.
	(call_internal): Combine alternatives.
	(call_value_internal): Likewise, and remove invalid constraints.
	* config/xtensa/constraints.md: New file.
	* config/xtensa/xtensa-protos.h (xtensa_const_ok_for_letter_p): Delete.
	(xtensa_extra_constraint): Delete.
	* doc/md.texi (Machine Constraints): Refer to constraints.md for
	Xtensa constraints.
--Ths line, and those below, will be ignored--

M    gcc/doc/md.texi
M    gcc/ChangeLog
M    gcc/config/xtensa/xtensa.c
M    gcc/config/xtensa/xtensa.h
M    gcc/config/xtensa/xtensa.md
A    gcc/config/xtensa/constraints.md
M    gcc/config/xtensa/xtensa-protos.h

From-SVN: r119072