diff options
Diffstat (limited to 'gcc/cfganal.c')
| -rw-r--r-- | gcc/cfganal.c | 44 |
1 files changed, 0 insertions, 44 deletions
diff --git a/gcc/cfganal.c b/gcc/cfganal.c index 5711794..5ad1a10 100644 --- a/gcc/cfganal.c +++ b/gcc/cfganal.c @@ -89,50 +89,6 @@ can_fallthru (src, target) return next_active_insn (insn) == insn2; } -/* Identify critical edges and set the bits appropriately. */ - -void -mark_critical_edges () -{ - int i, n = n_basic_blocks; - basic_block bb; - - /* We begin with the entry block. This is not terribly important now, - but could be if a front end (Fortran) implemented alternate entry - points. */ - bb = ENTRY_BLOCK_PTR; - i = -1; - - while (1) - { - edge e; - - /* (1) Critical edges must have a source with multiple successors. */ - if (bb->succ && bb->succ->succ_next) - { - for (e = bb->succ; e; e = e->succ_next) - { - /* (2) Critical edges must have a destination with multiple - predecessors. Note that we know there is at least one - predecessor -- the edge we followed to get here. */ - if (e->dest->pred->pred_next) - e->flags |= EDGE_CRITICAL; - else - e->flags &= ~EDGE_CRITICAL; - } - } - else - { - for (e = bb->succ; e; e = e->succ_next) - e->flags &= ~EDGE_CRITICAL; - } - - if (++i >= n) - break; - bb = BASIC_BLOCK (i); - } -} - /* Mark the back edges in DFS traversal. Return non-zero if a loop (natural or otherwise) is present. Inspired by Depth_First_Search_PP described in: |