Pencil in simple implementation of ModuleVersionGuardInstr

jruby · Jan 24, 2017 · e0209c9 · e0209c9
1 parent 92be326
commit e0209c9
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diff --git a/core/src/main/java/org/jruby/ir/instructions/ModuleVersionGuardInstr.java b/core/src/main/java/org/jruby/ir/instructions/ModuleVersionGuardInstr.java
@@ -3,6 +3,7 @@
 import org.jruby.ir.IRVisitor;
 import org.jruby.ir.Operation;
 import org.jruby.ir.operands.Operand;
+import org.jruby.ir.runtime.IRDeoptimization;
 import org.jruby.ir.transformations.inlining.CloneInfo;
 import org.jruby.parser.StaticScope;
 import org.jruby.runtime.DynamicScope;
@@ -58,4 +59,13 @@ private boolean versionMatches(ThreadContext context, StaticScope currScope, Dyn
     public void visit(IRVisitor visitor) {
         visitor.ModuleVersionGuardInstr(this);
     }
+
+    @Override
+    public Object interpret(ThreadContext context, StaticScope currScope, DynamicScope currDynScope, IRubyObject self, Object[] temp) {
+        if (!versionMatches(context, currScope, currDynScope, self, temp)) {
+            throw new IRDeoptimization(ipc);
+        }
+
+        return context.nil; /* not used */
+    }
 }
diff --git a/core/src/main/java/org/jruby/ir/runtime/IRDeoptimization.java b/core/src/main/java/org/jruby/ir/runtime/IRDeoptimization.java
@@ -0,0 +1,19 @@
+package org.jruby.ir.runtime;
+
+/**
+ * When we want to back off from optimized IR back to safe IR we will throw
+ * this exception.
+ */
+public class IRDeoptimization extends RuntimeException {
+    private final int ipc;
+
+    public IRDeoptimization(int ipc) {
+        super();
+
+        this.ipc = ipc;
+    }
+
+    public int getIPC() {
+        return ipc;
+    }
+}