After the previous patch we are left with an unreachable BB. This will
ICE if either we have -fschedule-fusion, or we do not have peephole2.
This fixes it. Okay for trunk?
Segher
2020-09-14 Segher Boessenkool <seg...@kernel.crashing.org>
PR rtl-optimization/96475
* bb-reorder.c (duplicate_computed_gotos): If we did anything, run
cleanup_cfg.
---
gcc/bb-reorder.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/gcc/bb-reorder.c b/gcc/bb-reorder.c
index 76e56b5..2ad5197 100644
--- a/gcc/bb-reorder.c
+++ b/gcc/bb-reorder.c
@@ -2760,6 +2760,10 @@ duplicate_computed_gotos (function *fun)
if (computed_jump_p (BB_END (bb)) && can_duplicate_block_p (bb))
changed |= maybe_duplicate_computed_goto (bb, max_size);
+ /* Some blocks may have become unreachable. */
+ if (changed)
+ cleanup_cfg (0);
+
/* Duplicating blocks will redirect edges and may cause hot blocks
previously reached by both hot and cold blocks to become dominated
only by cold blocks. */
--
1.8.3.1
