* optabs.h: Flatten insn-codes.h to source files.  Move some prototypes
	and structs to genopinit.c.  Adjust protyoptypes to match optabs.c.
	* genopinit.c (main): Emit prototypes and structs into insn-opinit.h.
	* optabs.c: (gen_move_insn): Move to expr.c.
	* expr.h: Move protypes and enums to optabs.h.
	* expr.c: (gen_move_insn): Relocate from optabs.c.
	* genemit.c (main): Include insn-codes.h.
	* gengtype.c (open_base_files): Include insn-codes.h.
	* asan.c: Include insn-codes.h.
	* bb-reorder.c: Ditto.
	* builtins.c: Ditto.
	* calls.c: Ditto.
	* cfgexpand.c: Ditto.
	* cilk-common.c: Ditto.
	* combine.c: Ditto.
	* dojump.c: Ditto.
	* dse.c: Ditto.
	* except.c: Ditto.
	* explow.c: Ditto.
	* expmed.c: Ditto.
	* function.c: Ditto.
	* ifcvt.c: Ditto.
	* internal-fn.c: Ditto.
	* loop-unroll.c: Ditto.
	* lra.c: Ditto.
	* modulo-sched.c: Ditto.
	* omp-low.c: Ditto.
	* postreload.c: Ditto.
	* ree.c: Ditto.
	* reload.c: Ditto.
	* reload1.c: Ditto.
	* shrink-wrap.c: Ditto.
	* simplify-rtx.c: Ditto.
	* stmt.c: Ditto.
	* target-globals.c: Ditto.
	* targhooks.c: Ditto.
	* toplev.c: Ditto.
	* tree-if-conv.c: Ditto.
	* tree-ssa-forwprop.c: Ditto.
	* tree-ssa-loop-prefetch.c: Ditto.
	* tree-ssa-math-opts.c: Ditto.
	* tree-ssa-phiopt.c: Ditto.
	* tree-ssa-reassoc.c: Ditto.
	* tree-switch-conversion.c: Ditto.
	* tree-vect-data-refs.c: Ditto.
	* tree-vect-generic.c: Ditto.
	* tree-vect-loop.c: Ditto.
	* tree-vect-patterns.c: Ditto.
	* tree-vect-slp.c: Ditto.
	* tree-vect-stmts.c: Ditto.
	* tree-vrp.c: Ditto.
	* value-prof.c: Ditto.
	* config/aarch64/aarch64-builtins.c: Ditto.
	* config/alpha/alpha.c: Ditto.
	* config/arm/arm.c: Ditto.
	* config/cris/cris.c: Ditto.
	* config/epiphany/epiphany.c: Ditto.
	* config/frv/frv.c: Ditto.
	* config/h8300/h8300.c: Ditto.
	* config/ia64/ia64.c: Ditto.
	* config/iq2000/iq2000.c: Ditto.
	* config/m32c/m32c.c: Ditto.
	* config/mep/mep.c: Ditto.
	* config/microblaze/microblaze.c: Ditto.
	* config/mips/mips.c: Ditto.
	* config/mn10300/mn10300.c: Ditto.
	* config/moxie/moxie.c: Ditto.
	* config/msp430/msp430.c: Ditto.
	* config/nios2/nios2.c: Ditto.
	* config/pa/pa.c: Ditto.
	* config/rl78/rl78.c: Ditto.
	* config/rs6000/rs6000.c: Ditto.
	* config/rx/rx.c: Ditto.
	* config/s390/s390.c: Ditto.
	* config/sh/sh.c: Ditto.
	* config/sh/sh_treg_combine.cc: Ditto.
	* config/spu/spu.c: Ditto.
	* config/stormy16/stormy16.c: Ditto.
	* config/tilegx/mul-tables.c: Ditto.
	* config/tilegx/tilegx.c: Ditto.
	* config/tilepro/mul-tables.c: Ditto.
	* config/tilepro/tilepro.c: Ditto.
	* config/vax/vax.c: Ditto.

From-SVN: r217005