diff options
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 37ad103..46470a4 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); |