2007-08-27  Sandra Loosemore  <sandra@codesourcery.com>
	    David Ung  <davidu@mips.com>
            Nigel Stephens <nigel@mips.com>

	gcc/
	Add mips16/nomips16 function attributes and -mflip-mips16 option
	for testing mixed-mode compilation.

	* config/mips/mips.opt (mflip-mips16): New.

	* config/mips/mips.h (SYMBOL_FLAG_MIPS16_FUNC): Define.
	(SYMBOL_FLAG_MIPS16_FUNC_P): Define.

	* config/mips/mips.c (mips_base_target_flags): New.
	(mips_base_mips16): New.
	(mips_base_schedule_insns): New.
	(mips_base_reorder_blocks_and_partition): New.
	(mips_base_align_loops): New.
	(mips_base_align_jumps): New.
	(mips_base_align_functions): New.
	(mips16_flipper): New.
	(mips_attribute_table): Add "mips16" and "nomips16" entries.
	(TARGET_SET_CURRENT_FUNCTION): Define.
	(mips_mips16_type_p, mips_nomips16_type_p): New.
	(mips_comp_type_attributes): Check mips16/nomips16 attributes.
	(mips_cannot_force_const_mem): Check current have_tls setting, not
	base setting for file.
	(mips_function_ok_for_sibcall): Make it deal with functions with
	mips16 attributes.
	(function_arg): Must check base mips16 mode for file, not just
	current setting.
	(mips_init_split_addresses): New, split out from override_options.
	(mips_init_relocs): New, split out from override_options.
	(was_mips16_p): New.
	(mips_set_mips16_mode): New, split out from override_options.
	(mips_set_current_function): New.
	(override_options):  Save base option settings.
	(mips_file_start): Move mips16 mode setting output from here....
	(mips_output_function_prologue): ....to here.
	(mips_output_mi_thunk): Check for mips16 function.
	(build_mips16_function_stub): Don't set .mips16 here.
	(build_mips16_call_stub): Likewise.
	(mips_expand_builtin): Error in mips16 mode.
	(mips_use_mips16_mode_p): New.
	(mips_encode_section_info): Check for mips16 function, and set
	SYMBOL_REF_FLAGS accordingly.

	* doc/extend.texi (Function Attributes): Document new
	mips16/nomips16 attributes.
	* doc/invoke.texi (Option Summary): Add -mflip-mips16.
	(MIPS Options): Document -mflip-mips16.

	* testsuite/gcc.target/mips/mips16-attributes.c: New.
	* testsuite/gcc.c-torture/compile/mipscop-1.c: Use nomips16
	attribute instead of using #ifndef to disable test for mips16.
	* testsuite/gcc.c-torture/compile/mipscop-2.c: Likewise.
	* testsuite/gcc.c-torture/compile/mipscop-3.c: Likewise.
	* testsuite/gcc.c-torture/compile/mipscop-4.c: Likewise.
	* testsuite/gcc.dg/torture/mips-hilo-1.c: Likewise.
	* testsuite/gcc.dg/torture/mips-hilo-2.c: Likewise.
	* testsuite/gcc.dg/torture/pr19683-1.c: Likewise.
	* testsuite/gcc.target/mips/madd-3.c: Add nomips16 attributes.
	* testsuite/gcc.target/mips/maddu-3.c: Likewise.
	* testsuite/gcc.target/mips/msub-3.c: Likewise.
	* testsuite/gcc.target/mips/msubu-3.c: Likewise.
	* testsuite/gcc.target/mips/dspr2-MULT.c: Likewise.
	* testsuite/gcc.target/mips/dspr2-MULTU.c: Likewise.