Thu Sep 16 11:50:52 1999  Alex Samuel  <samuel@codesourcery.com>

        * ggc.h (ggc_root): Move to ggc-common.c.
        (roots): Remove.
        (ggc_mark_rtx, ggc_mark_tree): Change to macro.
        (ggc_mark_rtvec, ggc_mark_tree_varray): Declare extern.
        (ggc_mark_tree_hash_table, ggc_mark_string, ggc_mark): Likewise.
        (ggc_mark_roots, ggc_mark_rtx_children, ggc_mark_tree_children): New.
        * ggc-common.c (ggc_root): Move from ggc.h.
        (roots): Declare, static.
        (ggc_mark_rtx, ggc_mark_tree): Renamed to...
        (ggc_mark_rtx_children, ggc_mark_tree_children): Don't check for
        null or check/set mark bit.
        (ggc_mark_roots): New.
        * ggc-simple.c (ggc_collect): Call ggc_mark_roots.

From-SVN: r29461