The attached patch adds nominal support for the ARM Cortex-M4 CPU core.
All the interesting bits are already there, this just adds the cpu name.

Tested on arm-none-eabi.
Applied to SVN trunk.

Paul

2010-10-09  Paul Brook  <paul@codesourcery.com>
 
	gcc/
	* doc/invoke.texi: Document ARM -mcpu=cortex-m4.
	* config/arm/arm.c (all_architectures): Change v7e-m default to
	cortexm4.
	* config/arm/arm-cores.def: Add cortex-m4.
	* config/arm/arm-tune.md: Regenerate.