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

Patch by Richard.

llvm-svn: 251213
diff --git a/llvm/lib/CodeGen/PseudoSourceValue.cpp b/llvm/lib/CodeGen/PseudoSourceValue.cpp
index da54c69..1f46417 100644
--- a/llvm/lib/CodeGen/PseudoSourceValue.cpp
+++ b/llvm/lib/CodeGen/PseudoSourceValue.cpp
@@ -50,9 +50,7 @@
 }
 
 bool PseudoSourceValue::mayAlias(const MachineFrameInfo *) const {
-  if (isGOT() || isConstantPool() || isJumpTable())
-    return false;
-  return true;
+  return !(isGOT() || isConstantPool() || isJumpTable());
 }
 
 bool FixedStackPseudoSourceValue::isConstant(