Bug 1380087 - Add an intrinsic to test for Map and Set objects. r=till

--HG--
extra : rebase_source : c30f89c15ddce434a86ca043b7ae6a9c5d00c905

js/src/builtin/Map.js

@@ -25,26 +25,21 @@ function MapConstructorInit(iterable) {
     }
 }
 
-/* ES6 20121122 draft 15.14.4.4. */
+// ES2018 draft rev f83aa38282c2a60c6916ebc410bfdf105a0f6a54
+// 23.1.3.5 Map.prototype.forEach ( callbackfn [ , thisArg ] )
 function MapForEach(callbackfn, thisArg = undefined) {
-    /* Step 1-2. */
+    // Step 1.
     var M = this;
-    if (!IsObject(M))
-        ThrowTypeError(JSMSG_INCOMPATIBLE_PROTO, "Map", "forEach", typeof M);
 
-    /* Step 3-4. */
-    try {
-        callFunction(std_Map_has, M);
-    } catch (e) {
-        // has will throw on non-Map objects, throw our own error in that case.
-        ThrowTypeError(JSMSG_INCOMPATIBLE_PROTO, "Map", "forEach", typeof M);
-    }
+    // Steps 2-3.
+    if (!IsObject(M) || !IsMapObject(M))
+        return callFunction(CallMapMethodIfWrapped, M, callbackfn, thisArg, "MapForEach");
 
-    /* Step 5. */
+    // Step 4.
     if (!IsCallable(callbackfn))
         ThrowTypeError(JSMSG_NOT_FUNCTION, DecompileArg(0, callbackfn));
 
-    /* Step 6-8. */
+    // Steps 5-8.
     var entries = callFunction(std_Map_iterator, M);
     while (true) {
         var result = callFunction(MapIteratorNext, entries);

js/src/builtin/Set.js

@@ -19,26 +19,21 @@ function SetConstructorInit(iterable) {
         callContentFunction(adder, set, nextValue);
 }
 
-/* ES6 20121122 draft 15.16.4.6. */
+// ES2018 draft rev f83aa38282c2a60c6916ebc410bfdf105a0f6a54
+// 23.2.3.6 Set.prototype.forEach ( callbackfn [ , thisArg ] )
 function SetForEach(callbackfn, thisArg = undefined) {
-    /* Step 1-2. */
+    // Step 1.
     var S = this;
-    if (!IsObject(S))
-        ThrowTypeError(JSMSG_INCOMPATIBLE_PROTO, "Set", "forEach", typeof S);
 
-    /* Step 3-4. */
-    try {
-        callFunction(std_Set_has, S);
-    } catch (e) {
-        // has will throw on non-Set objects, throw our own error in that case.
-        ThrowTypeError(JSMSG_INCOMPATIBLE_PROTO, "Set", "forEach", typeof S);
-    }
+    // Steps 2-3.
+    if (!IsObject(S) || !IsSetObject(S))
+        return callFunction(CallSetMethodIfWrapped, S, callbackfn, thisArg, "SetForEach");
 
-    /* Step 5-6. */
+    // Step 4.
     if (!IsCallable(callbackfn))
         ThrowTypeError(JSMSG_NOT_FUNCTION, DecompileArg(0, callbackfn));
 
-    /* Step 7-8. */
+    // Steps 5-8.
     var values = callFunction(std_Set_iterator, S);
     while (true) {
         var result = callFunction(SetIteratorNext, values);

js/src/jit/InlinableNatives.h

@@ -128,8 +128,10 @@
     _(IntrinsicIsSetIterator)       \
     _(IntrinsicIsStringIterator)    \
                                     \
+    _(IntrinsicIsMapObject)         \
     _(IntrinsicGetNextMapEntryForIterator) \
                                     \
+    _(IntrinsicIsSetObject)         \
     _(IntrinsicGetNextSetEntryForIterator) \
                                     \
     _(IntrinsicNewArrayIterator)    \

js/src/jit/MCallOptimize.cpp

@@ -12,6 +12,7 @@
 
 #include "builtin/AtomicsObject.h"
 #include "builtin/Intl.h"
+#include "builtin/MapObject.h"
 #include "builtin/SIMD.h"
 #include "builtin/TestingFunctions.h"
 #include "builtin/TypedObject.h"
@@ -313,10 +314,14 @@ IonBuilder::inlineNativeCall(CallInfo& callInfo, JSFunction* target)
         return inlineFinishBoundFunctionInit(callInfo);
 
       // Map intrinsics.
+      case InlinableNative::IntrinsicIsMapObject:
+        return inlineHasClass(callInfo, &MapObject::class_);
       case InlinableNative::IntrinsicGetNextMapEntryForIterator:
         return inlineGetNextEntryForIterator(callInfo, MGetNextEntryForIterator::Map);
 
       // Set intrinsics.
+      case InlinableNative::IntrinsicIsSetObject:
+        return inlineHasClass(callInfo, &SetObject::class_);
       case InlinableNative::IntrinsicGetNextSetEntryForIterator:
         return inlineGetNextEntryForIterator(callInfo, MGetNextEntryForIterator::Set);
 

js/src/vm/SelfHosting.cpp

@@ -2428,6 +2428,14 @@ static const JSFunctionSpec intrinsic_functions[] = {
     JS_FN("CallStarGeneratorMethodIfWrapped",
           CallNonGenericSelfhostedMethod<Is<StarGeneratorObject>>, 2, 0),
 
+    JS_INLINABLE_FN("IsMapObject", intrinsic_IsInstanceOfBuiltin<MapObject>, 1, 0,
+                    IntrinsicIsMapObject),
+    JS_FN("CallMapMethodIfWrapped", CallNonGenericSelfhostedMethod<Is<MapObject>>, 2, 0),
+
+    JS_INLINABLE_FN("IsSetObject", intrinsic_IsInstanceOfBuiltin<SetObject>, 1, 0,
+                    IntrinsicIsSetObject),
+    JS_FN("CallSetMethodIfWrapped", CallNonGenericSelfhostedMethod<Is<SetObject>>, 2, 0),
+
     JS_FN("IsWeakSet", intrinsic_IsInstanceOfBuiltin<WeakSetObject>, 1,0),
     JS_FN("CallWeakSetMethodIfWrapped",
           CallNonGenericSelfhostedMethod<Is<WeakSetObject>>, 2, 0),