Make boolean constructor private and kill off leak of new Boolean in IRBuilder

Author: enebo

core/src/main/java/org/jruby/ir/IRBuilder.java

@@ -3200,7 +3200,7 @@ public Operand buildReturn(ReturnNode returnNode, IRScope s) {
             // If this happens to be a module body, the runtime throws a local jump error if the
             // closure is a proc. If the closure is a lambda, then this becomes a normal return.
             IRMethod m = s.getNearestMethod();
-            addInstr(s, new RuntimeHelperCall(null, CHECK_FOR_LJE, new Operand[] { new Boolean(m == null) }));
+            addInstr(s, new RuntimeHelperCall(null, CHECK_FOR_LJE, new Operand[] { m == null ? Boolean.TRUE : Boolean.FALSE }));
             retVal = processEnsureRescueBlocks(s, retVal);
             addInstr(s, new NonlocalReturnInstr(retVal, m == null ? "--none--" : m.getName()));
         } else if (s.isModuleBody()) {

core/src/main/java/org/jruby/ir/IRManager.java

@@ -3,8 +3,8 @@
 import org.jruby.RubyInstanceConfig;
 import org.jruby.ir.listeners.IRScopeListener;
 import org.jruby.ir.listeners.InstructionsListener;
-import org.jruby.ir.operands.Nil;
-import org.jruby.ir.operands.TemporaryLocalVariable;
+import org.jruby.ir.operands.*;
+import org.jruby.ir.operands.Boolean;
 import org.jruby.ir.passes.BasicCompilerPassListener;
 import org.jruby.ir.passes.CompilerPass;
 import org.jruby.ir.passes.CompilerPassListener;
@@ -24,8 +24,7 @@ public class IRManager {
     private int dummyMetaClassCount = 0;
     private final IRModuleBody object = new IRClassBody(this, null, "Object", "", 0, null);
     private final Nil nil = new Nil();
-    private final org.jruby.ir.operands.Boolean trueObject = new org.jruby.ir.operands.Boolean(true);
-    private final org.jruby.ir.operands.Boolean falseObject = new org.jruby.ir.operands.Boolean(false);
+
     // Listeners for debugging and testing of IR
     private Set<CompilerPassListener> passListeners = new HashSet<CompilerPassListener>();
     private CompilerPassListener defaultListener = new BasicCompilerPassListener();
@@ -63,11 +62,11 @@ public Nil getNil() {
     }
 
     public org.jruby.ir.operands.Boolean getTrue() {
-        return trueObject;
+        return Boolean.TRUE;
     }
 
     public org.jruby.ir.operands.Boolean getFalse() {
-        return falseObject;
+        return Boolean.FALSE;
     }
 
     public IRModuleBody getObject() {

core/src/main/java/org/jruby/ir/operands/Boolean.java

@@ -9,7 +9,7 @@ public class Boolean extends ImmutableLiteral {
     public static final Boolean TRUE = new Boolean(true);
     public static final Boolean FALSE = new Boolean(false);
 
-    public Boolean(boolean truthy) {
+    private Boolean(boolean truthy) {
         super(OperandType.BOOLEAN);
 
         this.truthy = truthy;