mips.h (TARGET_CPU_CPP_BUILTINS): Check mips_base_mips16 instead of TARGET_MIPS16.

mips.h (TARGET_CPU_CPP_BUILTINS): Check mips_base_mips16 instead of TARGET_MIPS16.

gcc/
	* config/mips/mips.h (TARGET_CPU_CPP_BUILTINS): Check
	mips_base_mips16 instead of TARGET_MIPS16.
	(mips_base_mips16): Declare.
	* config/mips/mips.c (mips_base_mips16): Make global.
	(was_mips16_p): Remove GTY marker.
	(was_mips16_pch_p): New variable.
	(mips_set_mips16_mode): Check both was_mips16_p and was_mips16_pch_p.
	(mips_override_options): Force to non-MIPS16 mode initially.
	Do not complain about MIPS16 PIC incompatibilities here.
	Only allow -mgpopt if -mexplicit-relocs is in force for
	non-MIPS16 code.

gcc/testsuite/
	* gcc.target/mips/gcc-have-sync-compare-and-swap-1.c: Expect the
	macros to be defined for MIPS16 too.
	* gcc.target/mips/gcc-have-sync-compare-and-swap-2.c: Likewise.
	* gcc.target/mips/gcc-have-sync-compare-and-swap-3.c: New test.
	* gcc.target/mips/gcc-have-sync-compare-and-swap-4.c: Likewise.

From-SVN: r137539