[SPARC] Add support for LEON processor

[Eric Botcazou]

This patch finally adds support for the LEON family of processors to the SPARC 
back-end.  It also removes some left-overs (sparc86x and old Solaris stuff).
This is mostly Konrad et al.'s work, with some bits coming from AdaCore.

Applied on the mainline.  I'll add a blurb to the CHANGES file later.


2010-12-16  Konrad Eisele  <konrad@gaisler.com>
            Eric Botcazou  <ebotcazou@adacore.com>

	Support for LEON processor
        * config.gcc (sparc-*-elf*): Deal with sparc-leon specifically.
        (sparc-*-linux*): Likewise.
	(sparc-*-rtems*): Remove Solaris left-overs.
        (sparc*-*-*): Remove obsolete sparc86x setting.
        (sparc-leon*): Default to --with-cpu=v8 and --with-tune=leon.
        * doc/invoke.texi (SPARC Options): Document -mcpu/-mtune=leon.
        * config/sparc/sparc.h (TARGET_CPU_leon): Define.
        (TARGET_CPU_sparc86x): Delete.
        (TARGET_CPU_cypress): Define as alias to TARGET_CPU_v7.
        (TARGET_CPU_f930): Define as alias to TARGET_CPU_sparclite.
        (TARGET_CPU_f934): Likewise.
        (TARGET_CPU_tsc701): Define as alias to TARGET_CPU_sparclet.
        (CPP_CPU_SPEC): Add entry for -mcpu=leon.
        (enum processor_type): Add PROCESSOR_LEON.  Reorganize.
        * config/sparc/sparc.c (leon_costs): New cost array.
        (sparc_option_override): Add entry for TARGET_CPU_leon and -mcpu=leon.
        Initialize cost array to leon_costs if -mtune=leon.
        * config/sparc/sparc.md (cpu attribute): Add leon.  Reorganize.
        Include leon.md scheduling description.
        * config/sparc/leon.md: New file.
        * config/sparc/t-elf: Do not assemble Solaris startup files.
        * config/sparc/t-leon: New file.
        * config/sparc/t-leon3: Likewise.


-- 
Eric Botcazou
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