Implement inline %_IsJSProxy() for full codegen and Hydrogen

src/arm/full-codegen-arm.cc

Index: src/arm/full-codegen-arm.cc
diff --git a/src/arm/full-codegen-arm.cc b/src/arm/full-codegen-arm.cc
index de7d627aa1c3ee1537bb2b80a2635b750bbad045..bcec2bbf599cda82861ea3a2f1672232a50268e0 100644
--- a/src/arm/full-codegen-arm.cc
+++ b/src/arm/full-codegen-arm.cc
@@ -3440,6 +3440,32 @@ void FullCodeGenerator::EmitIsRegExp(CallRuntime* expr) {
 }
 
 
+void FullCodeGenerator::EmitIsJSProxy(CallRuntime* expr) {
+  ZoneList<Expression*>* args = expr->arguments();
+  DCHECK(args->length() == 1);
+
+  VisitForAccumulatorValue(args->at(0));
+
+  Label materialize_true, materialize_false;
+  Label* if_true = NULL;
+  Label* if_false = NULL;
+  Label* fall_through = NULL;
+  context()->PrepareTest(&materialize_true, &materialize_false, &if_true,
+                         &if_false, &fall_through);
+
+  __ JumpIfSmi(r0, if_false);
+  Register map = r1;
+  Register type_reg = r2;
+  __ ldr(map, FieldMemOperand(r0, HeapObject::kMapOffset));
+  __ ldrb(type_reg, FieldMemOperand(map, Map::kInstanceTypeOffset));
+  __ sub(type_reg, type_reg, Operand(FIRST_JS_PROXY_TYPE));
+  __ cmp(type_reg, Operand(LAST_JS_PROXY_TYPE - FIRST_JS_PROXY_TYPE));
+  PrepareForBailoutBeforeSplit(expr, true, if_true, if_false);
+  Split(ls, if_true, if_false, fall_through);
+
+  context()->Plug(if_true, if_false);
+}
+
 
 void FullCodeGenerator::EmitIsConstructCall(CallRuntime* expr) {
   DCHECK(expr->arguments()->length() == 0);