2004-04-13  Uros Bizjak  <uros@kss-loka.si>:

	* optabs.c (expand_twoval_unop): Reorder function arguments.
	* builtins.c (expand_builtin_mathfn_3): Update calls to
	expand_twoval_unop.

	* reg-stack.c (subst_stack_regs_pat): Handle UNSPEC_TAN_ONE
	and UNSPEC_TAN_TAN. Add missing comment.

	* config/i386/i386.md (*tandf3_1, *tansf3_1, *tanxf3_1): New
	patterns to implement fptan x87 instruction.
	(tandf2, tansf2, tanxf2): New expanders to implement tan, tanf
	and tanl built-ins as inline x87 intrinsics. Define corresponding
	peephole2 optimizers for 'fptan; fstp %st(0); fld1' sequence.
	(UNSPEC_TAN_ONE, UNSPEC_TAN_TAN): New unspecs to represent
	x87's fptan insn.


	* gcc.dg/i386-387-1.c: Add new test for __builtin_tan.
	* gcc.dg/i386-387-2.c: Likewise.

	* gcc.dg/i386-387-7.c: New test.
	* gcc.dg/i386-387-8.c: New test.

	* gcc.dg/builtins-37.c: New test.

From-SVN: r80677