config.gcc (mips64*-*-linux*): Handle mips64octeon*-*-linux*.

	* config.gcc (mips64*-*-linux*): Handle mips64octeon*-*-linux*.
	* config/mips/mips.h (enum processor_type): Add PROCESSOR_OCTEON.
	(TARGET_OCTEON): New macro.
	(TARGET_CPU_CPP_BUILTINS): Define __OCTEON__ for Octeon.
	(MIPS_ISA_LEVEL_SPEC, MIPS_ARCH_FLOAT_SPEC): Handle -march=octeon.
	(ISA_HAS_POP): New macro.
	* config/mips/driver-native.c (host_detect_local_cpu): Handle
	Octeon.
	* config/mips/mips.c (mips_cpu_info_table, mips_rtx_cost_data):
	Handle Octeon.
	* config/mips/mips.md (cpu): Add octeon.
	(type): Add pop attribute value.
	(popcount<mode>2): New pattern.
	* doc/invoke.texi (-march=@var{arch}): Add octeon.
testsuite/
	* gcc.target/mips/octeon-pop-1.c: New test.

From-SVN: r139554