mips.md (JOIN_MODE): New mode iterator.

mips.md (JOIN_MODE): New mode iterator.

gcc/
	* config/mips/mips.md (JOIN_MODE): New mode iterator.
	(join2_load_Store<JOIN_MODE:mode>): New pattern.
	(join2_loadhi): Likewise.
	(define_peehole2): Add peephole2 patterns to join 2 HI/SI/SF/DF-mode
	load-load and store-stores.
	* config/mips/mips.opt (mload-store-pairs): New option.
	(TARGET_LOAD_STORE_PAIRS): New macro.
	* config/mips/mips.h (ENABLE_LD_ST_PAIRS): Likewise.
	* config/mips/mips-protos.h (mips_load_store_bonding_p): New prototype.
	* config/mips/mips.c (mips_load_store_bonding_p): New function.

gcc/testsuite/
	* gcc.target/mips/p5600-bonding.c : New file.

From-SVN: r223334