PR tree-optimization/24226

	* tree-cfg.c (remove_bb): Clean up unreachable loops.
	* tree-flow.h (free_numbers_of_iterations_estimates_loop): Declare.
	* tree-ssa-loop-niter.c (free_numbers_of_iterations_estimates_loop):
	Export.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@105151 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 6 insertions, 0 deletions

diff --git a/gcc/tree-cfg.c b/gcc/tree-cfg.c
index 74e6063c0ab..2a0d75a2970 100644
--- a/gcc/tree-cfg.c
+++ b/gcc/tree-cfg.c
@@ -2020,6 +2020,12 @@ remove_bb (basic_block bb)
 	{
 	  loop->latch = NULL;
 	  loop->header = NULL;
+
+	  /* Also clean up the information associated with the loop.  Updating
+	     it would waste time. More importantly, it may refer to ssa
+	     names that were defined in other removed basic block -- these
+	     ssa names are now removed and invalid.  */
+	  free_numbers_of_iterations_estimates_loop (loop);
 	}
     }