--- /dev/null
+; Testcase reduced from 197.parser by bugpoint
+; RUN: as < %s | opt -raise -raise-start-inst=cast455 > /dev/null
+
+void %conjunction_prune() {
+; <label>:0 ; No predecessors!
+ br label %bb19
+
+bb19: ; preds = %bb22, %0
+ %reg205 = phi ulong [ %cast208, %bb22 ], [ 0, %0 ] ; <ulong> [#uses=2]
+ %reg449 = add ulong %reg205, 10 ; <ulong> [#uses=0]
+ %cast455 = cast ulong %reg205 to sbyte** ; <sbyte**> [#uses=1]
+ store sbyte* null, sbyte** %cast455
+ br label %bb22
+
+bb22: ; preds = %bb19
+ %cast208 = cast sbyte* null to ulong ; <ulong> [#uses=1]
+ br bool false, label %bb19, label %bb28
+
+bb28: ; preds = %bb22
+ ret void
+}
+