OpenE2K/gcc
2
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

remove write-only array in rev_post_order_and_mark_dfs_back_seme

Browse Source 
This removes a write-only array in
rev_post_order_and_mark_dfs_back_seme.

2020-07-20  Richard Biener  <rguenther@suse.de>

	* cfganal.c (rev_post_order_and_mark_dfs_back_seme): Remove
	write-only post array.
This commit is contained in:
Richard Biener 2020-07-20 15:58:19 +02:00
parent a926eeedf4
commit 57d4771b7c
1 changed files with 5 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
gcc/cfganal.c
View File

@ -1079,13 +1079,12 @@ rev_post_order_and_mark_dfs_back_seme (struct function *fn, edge entry,
a need to re-allocate. */
auto_vec<edge, 20> stack (2 * n_basic_blocks_for_fn (fn));
int *pre = XNEWVEC (int, 2 * last_basic_block_for_fn (fn));
int *post = pre + last_basic_block_for_fn (fn);
int *pre = XNEWVEC (int, last_basic_block_for_fn (fn));
/* BB flag to track nodes that have been visited. */
auto_bb_flag visited (fn);
/* BB flag to track which nodes have post[] assigned to avoid
zeroing post. */
/* BB flag to track which nodes have postorder visting completed. Used
for backedge marking. */
auto_bb_flag post_assigned (fn);
/* Push the first edge on to the stack. */
@ -1133,7 +1132,6 @@ rev_post_order_and_mark_dfs_back_seme (struct function *fn, edge entry,
{
/* There are no successors for the DEST node so assign
its reverse completion number. */
post[dest->index] = rev_post_order_num;
dest->flags |= post_assigned;
rev_post_order[rev_post_order_num] = dest->index;
rev_post_order_num++;
@ -1142,16 +1140,15 @@ rev_post_order_and_mark_dfs_back_seme (struct function *fn, edge entry,
else
{
if (dest->flags & visited
&& !(dest->flags & post_assigned)
&& src != entry->src
&& pre[src->index] >= pre[dest->index]
&& !(dest->flags & post_assigned))
&& pre[src->index] >= pre[dest->index])
e->flags |= EDGE_DFS_BACK;
if (idx != 0 && stack[idx - 1]->src != src)
{
/* There are no more successors for the SRC node
so assign its reverse completion number. */
post[src->index] = rev_post_order_num;
src->flags |= post_assigned;
rev_post_order[rev_post_order_num] = src->index;
rev_post_order_num++;