jump.c (squeeze_notes): Return true if no real insns were found.

	* jump.c (squeeze_notes): Return true if no real insns were found.
	* rtl.h (squeeze_notes): Adjust prototype.
	* cfgcleanup.c (merge_blocks_move_predecessor_nojumps): If
	squeeze_notes finds no real instructions, abort.
	(merge_blocks_move_successor_nojumps): Likewise.
	* loop.c (find_and_verify_loops): Likewise.
	* stmt.c (expand_end_case): Likewise.
	* ifcvt.c (dead_or_predicable): Return TRUE if squeeze_notes doesn't
	find any real instructions.

	* gcc.c-torture/compile/20011114-4.c: New test.

From-SVN: r47048

1 files changed, 2 insertions, 1 deletions

diff --git a/gcc/stmt.c b/gcc/stmt.c
index 53e1477..3f940e3 100644
--- a/gcc/stmt.c
+++ b/gcc/stmt.c
@@ -5598,7 +5598,8 @@ expand_end_case (orig_index)
 
       before_case = NEXT_INSN (before_case);
       end = get_last_insn ();
-      squeeze_notes (&before_case, &end);
+      if (squeeze_notes (&before_case, &end))
+	abort ();
       reorder_insns (before_case, end,
 		     thiscase->data.case_stmt.start);
     }