Refactor: Simplify boolean conditional return statements in lib/CodeGen.

Patch by Richard.

llvm-svn: 251213
diff --git a/llvm/lib/CodeGen/StackProtector.cpp b/llvm/lib/CodeGen/StackProtector.cpp
index af759cf..ee1a204 100644
--- a/llvm/lib/CodeGen/StackProtector.cpp
+++ b/llvm/lib/CodeGen/StackProtector.cpp
@@ -465,10 +465,7 @@
 
   // Return if we didn't modify any basic blocks. i.e., there are no return
   // statements in the function.
-  if (!HasPrologue)
-    return false;
-
-  return true;
+  return HasPrologue;
 }
 
 /// CreateFailBB - Create a basic block to jump to when the stack protector