[Truffle] Workaround for bug in 0.5 Truffle splitter/inliner.

Author: chrisseaton

core/src/main/java/org/jruby/truffle/nodes/dispatch/CachedBoxedMethodMissingDispatchNode.java

@@ -25,6 +25,7 @@
 import org.jruby.truffle.runtime.core.RubySymbol;
 import org.jruby.truffle.runtime.lookup.LookupNode;
 import org.jruby.truffle.runtime.methods.RubyMethod;
+import org.jruby.util.cli.Options;
 
 public abstract class CachedBoxedMethodMissingDispatchNode extends CachedDispatchNode {
 
@@ -43,6 +44,18 @@ public CachedBoxedMethodMissingDispatchNode(RubyContext context, Object cachedNa
         this.method = method;
 
         callNode = Truffle.getRuntime().createDirectCallNode(method.getCallTarget());
+
+        /*
+         * The splitter/inliner since Truffle 0.5 has a bug where it isn't splitting/inlining this call site - it should
+         * be fixed in 0.6, but until then we'll force it. Turn off (to test) with
+         * -Xtruffle.call.force_split_inline_missing = false.
+         */
+
+        if (Options.TRUFFLE_CALL_FORCE_SPLIT_INLINE_MISSING.load()) {
+            insert(callNode);
+            callNode.split();
+            callNode.forceInlining();
+        }
     }
 
     public CachedBoxedMethodMissingDispatchNode(CachedBoxedMethodMissingDispatchNode prev) {

core/src/main/java/org/jruby/util/cli/Options.java

@@ -148,6 +148,7 @@ public class Options {
     public static final Option<Integer> TRUFFLE_DISPATCH_MEGAMORPHIC_MAX = integer(TRUFFLE, "truffle.dispatch.megamorphic.max", 255, "Maximum size of a megamorphic call site cache.");
     public static final Option<Boolean> TRUFFLE_LOAD_PRINT = bool(TRUFFLE, "truffle.load.print", false, "Print the name of files as they're loaded.");
     public static final Option<Boolean> TRUFFLE_DEBUG_ENABLE_ASSERT_CONSTANT = bool(TRUFFLE, "truffle.debug.enable_assert_constant", false, "Enable special 'truffle_assert_constant' form.");
+    public static final Option<Boolean> TRUFFLE_CALL_FORCE_SPLIT_INLINE_MISSING = bool(TRUFFLE, "truffle.call.force_split_inline_missing", true, "Force splitting/inlining of a method missing call.");
 
     public static final Option<Boolean> NATIVE_ENABLED = bool(NATIVE, "native.enabled", true, "Enable/disable native code, including POSIX features and C exts.");
     public static final Option<Boolean> NATIVE_VERBOSE = bool(NATIVE, "native.verbose", false, "Enable verbose logging of native extension loading.");