New testcase for bugfx

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@1868 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/Transforms/LevelRaise/2002-03-14-ConvertableToGEPHang.ll b/test/Transforms/LevelRaise/2002-03-14-ConvertableToGEPHang.ll
new file mode 100644 (file)
index 0000000..43ea888
--- /dev/null
+++ b/test/Transforms/LevelRaise/2002-03-14-ConvertableToGEPHang.ll
@@ -0,0 +1,22 @@
+; This testcase found a bug in ConvertableToGEP that could cause an infinite loop
+; Note that this code is actually miscompiled from the input source, but despite 
+; that, level raise should not hang!
+;
+; RUN: as < %s | opt -raise    
+       
+       %Disjunct = type { \2 *, short, sbyte, sbyte *, { short, short, sbyte, sbyte, \2, sbyte * } *, { short, short, sbyte, sbyte, \2, sbyte * } * }
+%chosen_disjuncts = uninitialized global %Disjunct * *         ; <%Disjunct * * *> [#uses=1]
+implementation
+
+void "build_image_array"()
+begin
+bb0:                                   ;[#uses=0]
+       %reg109 = getelementptr %Disjunct * * * %chosen_disjuncts, uint 7               ; <%Disjunct * * *> [#uses=1]
+       %reg108 = load %Disjunct * * * %reg109, uint 0          ; <%Disjunct * *> [#uses=1]
+       %reg1000 = getelementptr %Disjunct * * %reg108, uint 3          ; <%Disjunct * *> [#uses=1]
+       %cast1007 = cast %Disjunct * * %reg1000 to sbyte * *            ; <sbyte * *> [#uses=1]
+       %reg110 = load sbyte * * %cast1007              ; <sbyte *> [#uses=1]
+       %cast1008 = cast ulong 4 to sbyte *             ; <sbyte *> [#uses=1]
+       %reg1001 = add sbyte * %reg110, %cast1008               ; <sbyte *> [#uses=0]
+       ret void
+end