New testcase finally identified!!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2935 91177308-0d34-0410-b5e6-96231b3b80d8

test/Transforms/LevelRaise/2002-07-16-SourceAndDestCrash.ll

@@ -0,0 +1,21 @@
+; This testcase, which was distilled from a HUGE function, causes problems
+; because both the source and the destination of the %Y cast are converted
+; to a new type, which causes massive problems.
+
+; RUN: as < %s | opt -raise -raise-start-inst=W
+
+int **%test(sbyte **%S) {
+BB0:
+   br label %Loop
+
+Loop:
+   %X = phi sbyte* [null , %BB0], [%Z, %Loop]
+
+   %Y = cast sbyte *%X to sbyte **
+   %Z = load sbyte** %Y
+   br bool true, label %Loop, label %Out
+
+Out:
+  %W = cast sbyte** %Y to int**
+  ret int** %W
+}