mt-sde (CFLAGS_FOR_TARGET): Add -mno-gpopt.

mt-sde (CFLAGS_FOR_TARGET): Add -mno-gpopt.

config/
	* mt-sde (CFLAGS_FOR_TARGET): Add -mno-gpopt.
	(CXXFLAGS_FOR_TARGET): Likewise.

gcc/
	* doc/invoke.texi: Document the MIPS -mlocal-sdata, -mextern-sdata
	and -mgpopt options.  Adjust the -G documentation to match.
	* config/mips/mips.opt (mextern-data, mgpopt, mlocal-data): New.
	* config/mips/mips.c (mips_rtx_constant_in_small_data_p): New
	function, split out from mips_classify_symbol.  Return false for
	!TARGET_LOCAL_SDATA.
	(mips_classify_symbol): Call mips_rtx_constant_in_small_data_p.
	Only use GP-relative accesses for non-pool symbols if TARGET_GPOPT.
	(override_options): Check whether the -mgpopt setting is consistent
	with the other flags.
	(symbolic_expression_p): Delete.
	(mips_select_rtx_section): Use mips_rtx_constant_in_small_data_p
	and default_elf_select_rtx_section.
	(mips_in_small_data_p): Honor section attributes for MIPS16 too.
	Return false for local data unless TARGET_LOCAL_SDATA.  Likewise
	external data and TARGET_EXTERN_SDATA.

gcc/testsuite/
	* gcc.dg/attr-alias-3.c: Use real asm for MIPS.
	* gcc.target/mips/mips.exp (setup_mips_tests): Set mips_forced_gp
	and mips_forced_no_er.
	(dg-mips-options): Add -mno-abicalls when a small-data option is
	specified.  Skip tests with small-data options if mips_forced_gp.
	Skip tests with -mexplicit-relocs if mips_forced_no_er.
	* gcc.target/mips/sdata-1.c: New test.
	* gcc.target/mips/sdata-2.c: Likewise.
	* gcc.target/mips/sdata-3.c: Likewise.
	* gcc.target/mips/sdata-4.c: Likewise.

From-SVN: r128230