Compile JSOP_DELNAME (bug 597137, r=dmandelin).

js/src/methodjit/Compiler.cpp

@@ -885,6 +885,18 @@ mjit::Compiler::generateMethod()
             jsop_pos();
           END_CASE(JSOP_POS)
 
+          BEGIN_CASE(JSOP_DELNAME)
+          {
+            uint32 index = fullAtomIndex(PC);
+            JSAtom *atom = script->getAtom(index);
+
+            prepareStubCall(Uses(0));
+            masm.move(ImmPtr(atom), Registers::ArgReg1);
+            stubCall(stubs::DelName);
+            frame.pushSynced();
+          }
+          END_CASE(JSOP_DELNAME)
+
           BEGIN_CASE(JSOP_DELPROP)
           {
             uint32 index = fullAtomIndex(PC);

js/src/methodjit/StubCalls.cpp

@@ -2665,6 +2665,28 @@ stubs::ArgSub(VMFrame &f, uint32 n)
     f.regs.sp[0] = rval;
 }
 
+void JS_FASTCALL
+stubs::DelName(VMFrame &f, JSAtom *atom)
+{
+    jsid id = ATOM_TO_JSID(atom);
+    JSObject *obj, *obj2;
+    JSProperty *prop;
+    if (!js_FindProperty(f.cx, id, &obj, &obj2, &prop))
+        THROW();
+
+    /* Strict mode code should never contain JSOP_DELNAME opcodes. */
+    JS_ASSERT(!f.fp()->script()->strictModeCode);
+
+    /* ECMA says to return true if name is undefined or inherited. */
+    f.regs.sp++;
+    f.regs.sp[-1] = BooleanValue(true);
+    if (prop) {
+        obj2->dropProperty(f.cx, prop);
+        if (!obj->deleteProperty(f.cx, id, &f.regs.sp[-1], false))
+            THROW();
+    }
+}
+
 template<JSBool strict>
 void JS_FASTCALL
 stubs::DelProp(VMFrame &f, JSAtom *atom)

js/src/methodjit/StubCalls.h

@@ -147,6 +147,7 @@ template<JSBool strict> void JS_FASTCALL DecElem(VMFrame &f);
 void JS_FASTCALL CallProp(VMFrame &f, JSAtom *atom);
 template <JSBool strict> void JS_FASTCALL DelProp(VMFrame &f, JSAtom *atom);
 template <JSBool strict> void JS_FASTCALL DelElem(VMFrame &f);
+void JS_FASTCALL DelName(VMFrame &f, JSAtom *atom);
 
 void JS_FASTCALL DefVar(VMFrame &f, JSAtom *atom);
 template<JSBool strict> void JS_FASTCALL DefFun(VMFrame &f, JSFunction *fun);