nios2.h (enum reg_class): Add IJMP_REGS enum value.

nios2.h (enum reg_class): Add IJMP_REGS enum value.

2015-05-12  Chung-Lin Tang  <cltang@codesourcery.com>
	    Sandra Loosemore <sandra@codesourcery.com>

	gcc/
	* config/nios2/nios2.h (enum reg_class): Add IJMP_REGS enum
	value.
	(REG_CLASS_NAMES): Add "IJMP_REGS".
	(REG_CLASS_CONTENTS): Add new entry for IJMP_REGS.
	* config/nios2/nios2.md (indirect_jump,*tablejump): Adjust to
	use new "c" register constraint.
	* config/nios2/constraint.md (c): New register constraint
	corresponding to IJMP_REGS.

Co-Authored-By: Sandra Loosemore <sandra@codesourcery.com>
From-SVN: r223082