vec.h: Implement integral type vector specialization.

vec.h: Implement integral type vector specialization.

	* vec.h: Implement integral type vector specialization.
	(VEC_T): Define a non-GTY structure.
	(VEC_T_GTY): Define a GTY structure.
	(VEC_TA): Rename to ...
	(VEC_TA_GTY): ... here.
	(DEF_VEC_I, DEF_VEC_ALLOC_I): New.
	(DEF_VEC_P, DEF_VEC_ALLOC_P): Adjust.
	(DEF_VEC_FUNC_P, DEF_VEC_ALLOC_FUNC_P): New, broken out of
	DEF_VEC_P and DEF_VEC_ALLOC_P.
	(DEF_VEC_O, DEF_VEC_ALLOC_O): Adjust.
	(DEF_VEC_FUNC_O, DEF_VEC_ALLOC_FUNC_O): New, broken out of
	DEF_VEC_O and DEF_VEC_ALLOC_O.
	* global.c: Use DEF_VEC_I, DEF_VEC_ALLOC_I.
	* lambda-code.c: Likewise.
	* tree-into-ssa.c: Likewise.
	* tree-ssa-live.c: Likewise.

From-SVN: r100251