re PR middle-end/81194 (ICE during RTL pass: expand)

gcc/
	PR middle-end/81194
	* cfgexpand.c (expand_gimple_stmt_1): Handle switch statements
	with only one label.
	* stmt.c (expand_case): Assert NCASES is greater than one.

gcc/testsuite/
	PR middle-end/81194
	* g++.dg/pr81194.C: New test.

From-SVN: r249783

1 files changed, 4 insertions, 1 deletions

diff --git a/gcc/stmt.c b/gcc/stmt.c
index 9b5157d..fdf29a5 100644
--- a/gcc/stmt.c
+++ b/gcc/stmt.c
@@ -1142,7 +1142,10 @@ expand_case (gswitch *stmt)
   /* cleanup_tree_cfg removes all SWITCH_EXPR with their index
      expressions being INTEGER_CST.  */
   gcc_assert (TREE_CODE (index_expr) != INTEGER_CST);
-  
+
+  /* Optimization of switch statements with only one label has already
+     occurred, so we should never see them at this point.  */
+  gcc_assert (ncases > 1);
 
   do_pending_stack_adjust ();