new testcase, distilled from povray

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28778 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/Transforms/LoopUnswitch/2006-06-13-SingleEntryPHI.ll b/test/Transforms/LoopUnswitch/2006-06-13-SingleEntryPHI.ll
new file mode 100644 (file)
index 0000000..6523f65
--- /dev/null
+++ b/test/Transforms/LoopUnswitch/2006-06-13-SingleEntryPHI.ll
@@ -0,0 +1,44 @@
+; RUN: llvm-as < %s | opt -loop-unswitch -disable-output
+
+       %struct.BLEND_MAP = type { short, short, short, int, %struct.BLEND_MAP_ENTRY* }
+       %struct.BLEND_MAP_ENTRY = type { float, ubyte, { [5 x float], [4 x ubyte] } }
+       %struct.TPATTERN = type { ushort, ushort, ushort, int, float, float, float, %struct.WARP*, %struct.TPATTERN*, %struct.BLEND_MAP*, { %struct.anon, [4 x ubyte] } }
+       %struct.TURB = type { ushort, %struct.WARP*, [3 x double], int, float, float }
+       %struct.WARP = type { ushort, %struct.WARP* }
+       %struct.anon = type { float, [3 x double] }
+
+implementation   ; Functions:
+
+void %Parse_Pattern() {
+entry:
+       br label %bb1096.outer20
+
+bb671:         ; preds = %cond_true1099
+       br label %bb1096.outer23
+
+bb1096.outer20.loopexit:               ; preds = %cond_true1099
+       %Local_Turb.0.ph24.lcssa = phi %struct.TURB* [ %Local_Turb.0.ph24, %cond_true1099 ]             ; <%struct.TURB*> [#uses=1]
+       br label %bb1096.outer20
+
+bb1096.outer20:                ; preds = %bb1096.outer20.loopexit, %entry
+       %Local_Turb.0.ph22 = phi %struct.TURB* [ undef, %entry ], [ %Local_Turb.0.ph24.lcssa, %bb1096.outer20.loopexit ]                ; <%struct.TURB*> [#uses=1]
+       %tmp1098 = seteq int 0, 0               ; <bool> [#uses=1]
+       br label %bb1096.outer23
+
+bb1096.outer23:                ; preds = %bb1096.outer20, %bb671
+       %Local_Turb.0.ph24 = phi %struct.TURB* [ %Local_Turb.0.ph22, %bb1096.outer20 ], [ null, %bb671 ]                ; <%struct.TURB*> [#uses=2]
+       br label %bb1096
+
+bb1096:                ; preds = %cond_true1099, %bb1096.outer23
+       br bool %tmp1098, label %cond_true1099, label %bb1102
+
+cond_true1099:         ; preds = %bb1096
+       switch int 0, label %bb1096.outer20.loopexit [
+                int 161, label %bb671
+                int 359, label %bb1096
+       ]
+
+bb1102:                ; preds = %bb1096
+       %Local_Turb.0.ph24.lcssa1 = phi %struct.TURB* [ %Local_Turb.0.ph24, %bb1096 ]           ; <%struct.TURB*> [#uses=0]
+       ret void
+}