Add Loop Rotate test cases.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35838 91177308-0d34-0410-b5e6-96231b3b80d8

test/Transforms/LoopRotate/LRCrash-2.ll

@@ -0,0 +1,30 @@
+; RUN: llvm-upgrade < %s | llvm-as | opt -loop-rotate -disable-output
+
+void @findAllPairs() {
+entry:
+	br i1 false, label %bb139, label %cond_true
+
+cond_true:		; preds = %entry
+	ret void
+
+bb90:		; preds = %bb139
+	br i1 false, label %bb136, label %cond_next121
+
+cond_next121:		; preds = %bb90
+	br i1 false, label %bb136, label %bb127
+
+bb127:		; preds = %cond_next121
+	br label %bb136
+
+bb136:		; preds = %bb127, %cond_next121, %bb90
+	%changes.1 = phi i32 [ %changes.2, %bb90 ], [ %changes.2, %cond_next121 ], [ 1, %bb127 ]		; <i32> [#uses=1]
+	br label %bb139
+
+bb139:		; preds = %bb136, %entry
+	%changes.2 = phi i32 [ %changes.1, %bb136 ], [ 0, %entry ]		; <i32> [#uses=3]
+	br i1 false, label %bb90, label %bb142
+
+bb142:		; preds = %bb139
+	%changes.2.lcssa = phi i32 [ %changes.2, %bb139 ]		; <i32> [#uses=0]
+	ret void
+}