flow.c: Grammar check and clarify a lot of comments.

        * flow.c: Grammar check and clarify a lot of comments.
        (try_simplify_condjump): Rename variables to be clearer.
        (try_forward_edges): Skip complex and fallthru edges.
        Rearrange tests to avoid duplicate checks.
        (flow_find_cross_jump): Likewise.
        (outgoing_edges_match): Allow match if neither branch has
        probability data.  Loosen probability match to 5%.
        (try_crossjump_to_edge): Hoist repeated indirection into
        local variables.
        (try_crossjump_bb): Don't check complex edges.  Eliminate
        redundant crossjump tests.
        (try_optimize_cfg): Fix use of bool.  Reorganize cheaper
        checks before more expensive checks.

From-SVN: r44257

gcc/ChangeLog

 2001-07-22  Richard Henderson  <rth@redhat.com>
 
+	* flow.c: Grammar check and clarify a lot of comments.
+	(try_simplify_condjump): Rename variables to be clearer.
+	(try_forward_edges): Skip complex and fallthru edges.
+	Rearrange tests to avoid duplicate checks.
+	(flow_find_cross_jump): Likewise.
+	(outgoing_edges_match): Allow match if neither branch has
+	probability data.  Loosen probability match to 5%.
+	(try_crossjump_to_edge): Hoist repeated indirection into 
+	local variables.
+	(try_crossjump_bb): Don't check complex edges.  Eliminate
+	redundant crossjump tests.
+	(try_optimize_cfg): Fix use of bool.  Reorganize cheaper
+	checks before more expensive checks.
+
+2001-07-22  Richard Henderson  <rth@redhat.com>
+
 	* fold-const.c (fold): Test vs FLOAT_TYPE_P instead of
 	INTEGRAL_TYPE_P when folding comparisons with operand_equal_p
 	arguments.