i386: Add mask2 to builtin_description

i386: Add mask2 to builtin_description

There are

struct builtin_description
{
  const HOST_WIDE_INT mask;
  const enum insn_code icode;
  const char *const name;
  const enum ix86_builtins code;
  const enum rtx_code comparison;
  const int flag;
};

Since "mask" is used for both ix86_isa_flags and ix86_isa_flags2, buitins
with both flags can't be handled easily.  This patch adds mask2 to
builtin_description to handle it properly.

2019-01-22  Hongtao Liu  <hongtao.liu@intel.com>
	    H.J. Lu  <hongjiu.lu@intel.com>

	PR target/88909
	* config/i386/i386-builtin.def: Add mask2 to all builtin
	initializations.  Merge ARGS2 and SPECIAL_ARGS2 into ARGS and
	SPECIAL_ARGS.
	* config/i386/i386.c (BDESC): Add mask2 to the definition.
	(BDESC_FIRST): Likewise.
	(define_builtin): Add an argument for mask2.  Updated to handle
	both ix86_isa_flags and ix86_isa_flags2.
	(define_builtin_const): Likewise.
	(define_builtin_pure): Likewise.
	(define_builtin2): Deleted.
	(define_builtin_const2): Likewise.
	(builtin_description): Add a member, mask2.
	(bdesc_*): Add mask2 to builtin initializations.
	(ix86_init_mmx_sse_builtins): Update calls to def_builtin,
	def_builtin_const and def_builtin_pure.  Remove SPECIAL_ARGS2
	support.
	(ix86_get_builtin_func_type): Remove SPECIAL_ARGS2 support.

Co-Authored-By: H.J. Lu <hongjiu.lu@intel.com>
From-SVN: r268155