Simplify LLVM_ATTRIBUTE_USED call sites.

llvm-svn: 331599
diff --git a/llvm/lib/Support/Signals.cpp b/llvm/lib/Support/Signals.cpp
index cdf2d86..414619b 100644
--- a/llvm/lib/Support/Signals.cpp
+++ b/llvm/lib/Support/Signals.cpp
@@ -64,15 +64,10 @@
   return format_hex((uint64_t)PC, PtrWidth);
 }
 
-static bool printSymbolizedStackTrace(StringRef Argv0,
-                                      void **StackTrace, int Depth,
-                                      llvm::raw_ostream &OS)
-  LLVM_ATTRIBUTE_USED;
-
 /// Helper that launches llvm-symbolizer and symbolizes a backtrace.
-static bool printSymbolizedStackTrace(StringRef Argv0,
-                                      void **StackTrace, int Depth,
-                                      llvm::raw_ostream &OS) {
+LLVM_ATTRIBUTE_USED
+static bool printSymbolizedStackTrace(StringRef Argv0, void **StackTrace,
+                                      int Depth, llvm::raw_ostream &OS) {
   if (DisableSymbolication)
     return false;