* src/vm/jit/parse.c (new_parse): MZERO basicblock array.

* src/vm/jit/parse.c (new_parse): MZERO basicblock array.
(parse): Likewise.

* src/vm/jit/jit.h (JITDATA_FLAG_REORDER): Added.
(JITDATA_HAS_FLAG_REORDER): Likewise.
(basicblock): Removed pre_count and added predecessorcount,
successorcount, predecessors, successors.
(BASICBLOCK_INIT): Don't zero fields.

* src/vm/jit/stack.c (new_stack_analyse): Renamed pre_count to
predecessorcount.
(stack_analyse): Likewise and removed predecessor count calculation.

* src/vm/jit/show.c (new_show_basicblock): Likewise.
(show_basicblock): Likewise.

* src/vm/jit/ifconv/ifconv.c (ifconv_static): Likewise.