2015-07-14  Sandra Loosemore  <sandra@codesourcery.com>
	    Cesar Philippidis  <cesar@codesourcery.com>
	    Chung-Lin Tang  <cltang@codesourcery.com>

	gcc/
	* config/nios2/constraints.md (U, v): New constraints.
	* config/nios2/predicates.md (rdprs_dcache_operand): New.
	(ldstex_memory_operand): New.
	* config/nios2/sync.md: New file.
	* config/nios2/nios2.md (unspecv): Add new builtin function
	UNSPECV codes.
	(rdprs, flushd, flushda, wrpie, eni): New patterns.
	(top-level): Include sync.md.
	* config/nios2/nios2.c (N2_FTYPES): Add function types for
	new builtins.
	(N2_BUILTINS): Add arch field setting, add new builtins.
	(enum nios2_builtin_code,nios2_builtins): Update N2_BUILTIN_DEF
	for arch field.
	(nios2_expand_ldst_builtin): Rename from nios2_expand_ldstio_builtin.
	Also handle ldex/stex/ldsex/stsex builtins.
	(nios2_expand_rdprs_builtin): New function.
	(nios2_expand_cache_builtin): New function.
	(nios2_expand_wrpie_builtin): New function.
	(nios2_expand_eni_builtin): New function.
	(nios2_expand_builtin): Add arch field handling and new builtin 
        cases.
	* doc/extend.texi (Altera Nios II Built-in Functions): Document
	new builtins.
	* doc/md.texi (Machine Constraints): Document U and v constraints.

	gcc/testsuite/
	* gcc.target/nios2/nios2-flushd.c: New.
	* gcc.target/nios2/nios2-rdprs.c: New.
	* gcc.target/nios2/r2-atomic.c: New.
	* gcc.target/nios2/r2-eni.c: New.
	* gcc.target/nios2/r2-wrpie.c: New.

Co-Authored-By: Cesar Philippidis <cesar@codesourcery.com>
Co-Authored-By: Chung-Lin Tang <cltang@codesourcery.com>

From-SVN: r225800