Richard,

This patch series adds analysis of register usage of functions for usage by IRA.
The original post is here
( http://gcc.gnu.org/ml/gcc-patches/2013-01/msg01234.html ).

This patch adds a test-case for -fuse-caller-save.  Since the test-case has
different output for mips16 and micromips, new effective targets are introduced.

Build and reg-tested on mips.

OK for trunk?

Thanks,
  -Tom

2013-03-30  Radovan Obradovic  <robradovic@mips.com>
            Tom de Vries  <tom@codesourcery.com>

	* lib/target-supports.exp (check_effective_target_mips16)
	(check_effective_target_micromips): New proc.
	* gcc.target/mips/mips.exp: Add use-caller-save to -ffoo/-fno-foo
	options.  Add -save-temps to mips_option_groups.
	* gcc.target/mips/aru-1.c: New test.