diff options
| author | Kazu Hirata <kazu@cs.umass.edu> | 2005-03-21 17:04:24 +0000 |
|---|---|---|
| committer | Kazu Hirata <kazu@cs.umass.edu> | 2005-03-21 17:04:24 +0000 |
| commit | b355e44faaa9e61906b7e139361356704886829e (patch) | |
| tree | b606d6bd4cf292fe00c018f6c1262177977ad7f2 /gcc/tree-into-ssa.c | |
| parent | cda6ba76c15252bd11771561526ffbdd201a3885 (diff) | |
* tree-into-ssa.c: Remove obsolete comments.
git-svn-id: https://gcc.gnu.org/svn/gcc/trunk@96813 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/tree-into-ssa.c')
| -rw-r--r-- | gcc/tree-into-ssa.c | 9 |
1 files changed, 3 insertions, 6 deletions
diff --git a/gcc/tree-into-ssa.c b/gcc/tree-into-ssa.c index 37ad103c67f..46470a407bb 100644 --- a/gcc/tree-into-ssa.c +++ b/gcc/tree-into-ssa.c @@ -1271,9 +1271,8 @@ mark_def_site_blocks (void) those variables are removed from the flow graph so that they can be computed again. - 2- Compute dominance frontier and immediate dominators, needed to - insert PHI nodes and rename the function in dominator tree - order. + 2- Compute dominance frontier, needed to insert PHI nodes and + rename the function in dominator tree order. 3- Find and mark all the blocks that define variables (mark_def_site_blocks). @@ -1319,9 +1318,7 @@ rewrite_into_ssa (bool all) mark_def_site_blocks (); - /* Initialize dominance frontier and immediate dominator bitmaps. - Also count the number of predecessors for each block. Doing so - can save significant time during PHI insertion for large graphs. */ + /* Initialize dominance frontier. */ dfs = (bitmap *) xmalloc (last_basic_block * sizeof (bitmap *)); FOR_EACH_BB (bb) dfs[bb->index] = BITMAP_ALLOC (NULL); |