diff options
Diffstat (limited to 'gcc/tree-cfg.c')
| -rw-r--r-- | gcc/tree-cfg.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/gcc/tree-cfg.c b/gcc/tree-cfg.c index a9a2c2f..38e5e7d 100644 --- a/gcc/tree-cfg.c +++ b/gcc/tree-cfg.c @@ -1723,11 +1723,13 @@ gimple_can_merge_blocks_p (basic_block a, basic_block b) } /* Protect simple loop latches. We only want to avoid merging - the latch with the loop header in this case. */ + the latch with the loop header or with a block in another + loop in this case. */ if (current_loops && b->loop_father->latch == b && loops_state_satisfies_p (LOOPS_HAVE_SIMPLE_LATCHES) - && b->loop_father->header == a) + && (b->loop_father->header == a + || b->loop_father != a->loop_father)) return false; /* It must be possible to eliminate all phi nodes in B. If ssa form |