Simplify LLVM_ATTRIBUTE_USED call sites.

llvm-svn: 331599
diff --git a/llvm/lib/Transforms/Utils/LowerSwitch.cpp b/llvm/lib/Transforms/Utils/LowerSwitch.cpp
index efdc04a..8643ad8 100644
--- a/llvm/lib/Transforms/Utils/LowerSwitch.cpp
+++ b/llvm/lib/Transforms/Utils/LowerSwitch.cpp
@@ -155,11 +155,8 @@
 }
 
 /// Used for debugging purposes.
-static raw_ostream& operator<<(raw_ostream &O,
-                               const LowerSwitch::CaseVector &C)
-    LLVM_ATTRIBUTE_USED;
-
-static raw_ostream& operator<<(raw_ostream &O,
+LLVM_ATTRIBUTE_USED
+static raw_ostream &operator<<(raw_ostream &O,
                                const LowerSwitch::CaseVector &C) {
   O << "[";