1 files changed, 48 insertions, 0 deletions
diff --git a/test/Transforms/SimplifyCFG/CoveredLookupTable.ll b/test/Transforms/SimplifyCFG/CoveredLookupTable.ll
new file mode 100644
index 000000000000..8b45a590bb1f
--- /dev/null
+++ b/test/Transforms/SimplifyCFG/CoveredLookupTable.ll
@@ -0,0 +1,48 @@
+; RUN: opt -simplifycfg -S %s | FileCheck %s
+; rdar://15268442
+
+target datalayout = "e-p:64:64:64-S128-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f16:16:16-f32:32:32-f64:64:64-f128:128:128-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"
+target triple = "x86_64-apple-darwin12.0.0"
+
+; CHECK-LABEL: define i3 @coveredswitch_test(
+; CHECK: entry:
+; CHECK-NEXT: sub i3 %input, -4
+; CHECK-NEXT: zext i3 %switch.tableidx to i24
+; CHECK-NEXT: mul i24 %switch.cast, 3
+; CHECK-NEXT: lshr i24 7507338, %switch.shiftamt
+; CHECK-NEXT: trunc i24 %switch.downshift to i3
+; CHECK-NEXT: ret i3 %switch.masked
+
+define i3 @coveredswitch_test(i3 %input) {
+entry:
+  switch i3 %input, label %bb8 [
+    i3 0, label %bb7
+    i3 1, label %bb
+    i3 2, label %bb3
+    i3 3, label %bb4
+    i3 4, label %bb5
+    i3 5, label %bb6
+  ]
+
+bb:                                               ; preds = %entry
+  br label %bb8
+
+bb3:                                              ; preds = %entry
+  br label %bb8
+
+bb4:                                              ; preds = %entry
+  br label %bb8
+
+bb5:                                              ; preds = %entry
+  br label %bb8
+
+bb6:                                              ; preds = %entry
+  br label %bb8
+
+bb7:                                              ; preds = %entry
+  br label %bb8
+
+bb8:                                              ; preds = %bb7, %bb6, %bb5, %bb4, %bb3, %bb, %entry
+  %result = phi i3 [ 0, %bb7 ], [ 1, %bb6 ], [ 2, %bb5 ], [ 3, %bb4 ], [ 4, %bb3 ], [ 5, %bb ], [ 6, %entry ]
+  ret i3 %result
+}