Added test for commit r212802 that was missing

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@212803 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/Transforms/LowerSwitch/2014-06-23-PHIlowering.ll b/test/Transforms/LowerSwitch/2014-06-23-PHIlowering.ll
new file mode 100644 (file)
index 0000000..c6cddf6
--- /dev/null
+++ b/test/Transforms/LowerSwitch/2014-06-23-PHIlowering.ll
@@ -0,0 +1,40 @@
+; RUN: opt < %s -lowerswitch -S | FileCheck %s
+
+define i32 @test(i32 %arg) #0 {
+; CHECK-LABEL: @test
+; CHECK: ; <label>:2
+; CHECK-NEXT:  %res.0 = phi i32 [ 1, %NodeBlock ], [ 2, %1 ]
+; CHECK-NEXT:  br label %3
+; CHECK: ; <label>:5
+; CHECK-NEXT:   %res.3 = phi i32 [ 0, %NewDefault ], [ %res.2, %4 ]
+; CHECK-NEXT:   %6 = add nsw i32 %res.3, 1
+; CHECK-NEXT:   ret i32 %6
+
+  switch i32 %arg, label %5 [
+    i32 1, label %1
+    i32 2, label %2
+    i32 3, label %3
+    i32 4, label %4
+  ]
+
+; <label>:1
+  br label %2
+
+; <label>:2
+  %res.0 = phi i32 [ 1, %0 ], [ 2, %1 ]
+  br label %3
+
+; <label>:3
+  %res.1 = phi i32 [ 0, %0 ], [ %res.0, %2 ]
+  %phitmp = add nsw i32 %res.1, 2
+  br label %4
+
+; <label>:4
+  %res.2 = phi i32 [ 1, %0 ], [ %phitmp, %3 ]
+  br label %5
+
+; <label>:5
+  %res.3 = phi i32 [ 0, %0 ], [ %res.2, %4 ]
+  %6 = add nsw i32 %res.3, 1
+  ret i32 %6
+}