sparc.h (TARGET_SWITCHES): Add -m{,no-}impure-text.

	* sparc/sparc.h (TARGET_SWITCHES): Add -m{,no-}impure-text.
	(MASK_IMPURE_TEXT, TARGET_IMPURE_TEXT): Define.
	(LINK_SPEC): Only add `-assert pure-text' if -mimpure-text wasn't used.

	* sparc/sparc.h (TARGET_CPU_sparc{,let,lite,64}): Define.
	({CPP,ASM}_DEFAULT_SPEC): Set from TARGET_CPU_foo.
	(SPARC_ARCH64 CPP_PREDEFINES): Define __arch64__.
	(CPP_SPEC): Add %(cpp_cpu).
	(CPP_CPU_SPEC): Define.
	(CC1_SPEC): Convert -m<cpu> to -mcpu=<cpu>.
	(ASM_SPEC): Add %(asm_cpu).
	(ASM_CPU_SPEC): Define.
	(EXTRA_SPECS,SUBTARGET_EXTRA_SPECS): Define.
	(OVERRIDE_OPTIONS): Call SUBTARGET_OVERRIDE_OPTIONS after
	sparc_override_options.
	({MASK,TARGET}_SUPERSPARC): Delete.
	({MASK,TARGET}_SPARCLET): Define.
	(MASK_ISA): Renamed from MASK_CPUS.
	({MASK,TARGET}_FRW): Delete.
	(TARGET_SWITCHES): Delete no-{v8,sparclite}.
	(sparc_cpu,sparc_cpu_string): Declare.
	({SUB,}TARGET_OPTIONS): Define.
	(FIXED_REGISTERS): Add definitions for sparc64 in 32 bit mode.
	(CONDITIONAL_REGISTER_USAGE): Don't set fixed_regs[234] if sparc64.
	Don't set call_used_regs[48..80] for sparc64 in 32 bit mode.
	Don't clobber fixed_regs[234] if -ffixed- was passed.
	(FRAME_POINTER_REQUIRED,INITIAL_FRAME_POINTER_OFFSET,
	BASE_{INCOMING_ARG,OUTGOING_VALUE}_REG,INCOMING_REGNO,OUTGOING_REGNO,
	FUNCTION_{PROLOGUE,EPILOGUE},DELAY_SLOTS_FOR_EPILOGUE): TARGET_FRW
	renamed to TARGET_FLAT.
	(ADJUST_COST): Change test for supersparc.

From-SVN: r11320