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

Patch by Richard.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@251213 91177308-0d34-0410-b5e6-96231b3b80d8

lib/CodeGen/StackProtector.cpp

@@ -465,10 +465,7 @@ bool StackProtector::InsertStackProtectors() {
 
   // 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