Hello,

The ARM backend uses an unsigned long to record CPU feature flags and there are
currently 30 bits in use. This series of patches replaces the single unsigned
long with a representation based on an array of values.

This patch adds, but doesn't use, type arm_feature_set and macros prefixed
with ARM_FSET to represent and operate on feature sets.

Tested by building with no errors. Also tested as part of the series, for
arm-none-linux-gnueabihf with check-gcc.

Ok for trunk?
Matthew

gcc/
2015-06-22  Matthew Wahab  <matthew.wahab@arm.com>

	* config/arm/arm-protos.h (FL_NONE): New.
	(FL_ANY): New.
	(arm_feature_set): New.
	(ARM_FSET_MAKE): New.
	(ARM_FSET_MAKE_CPU1): New.
	(ARM_FSET_MAKE_CPU2): New.
	(ARM_FSET_CPU1): New.
	(ARM_FSET_CPU2): New.
	(ARM_FSET_EMPTY): New.
	(ARM_FSET_ANY): New.
	(ARM_FSET_HAS_CPU1): New.
	(ARM_FSET_HAS_CPU2): New.
	(ARM_FSET_ADD_CPU1): New.
	(ARM_FSET_ADD_CPU2): New.
	(ARM_FSET_DEL_CPU1): New.
	(ARM_FSET_DEL_CPU2): New.
	(ARM_FSET_UNION): New.
	(ARM_FSET_INTER): New.
	(ARM_FSET_XOR): New.
	(ARM_FSET_EXCLUDE): New.
	(AFM_FSET_IS_EMPTY): New.
	(ARM_FSET_CPU_SUBSET): New.