[Isolates] Merge from bleeding_edge to isolates, revisions 6100-6300.

src/assembler.cc

Index: src/assembler.cc
===================================================================
--- src/assembler.cc	(revision 6941)
+++ src/assembler.cc	(working copy)
@@ -66,6 +66,7 @@
 
 const double DoubleConstant::min_int = kMinInt;
 const double DoubleConstant::one_half = 0.5;
+const double DoubleConstant::minus_zero = -0.0;
 const double DoubleConstant::negative_infinity = -V8_INFINITY;
 
 
@@ -656,6 +657,11 @@
 }
 
 
+ExternalReference ExternalReference::arguments_marker_location() {
+  return ExternalReference(FACTORY->arguments_marker().location());
+}
+
+
 ExternalReference ExternalReference::roots_address() {
   return ExternalReference(HEAP->roots_address());
 }
@@ -736,6 +742,12 @@
 }
 
 
+ExternalReference ExternalReference::address_of_minus_zero() {
+  return ExternalReference(reinterpret_cast<void*>(
+      const_cast<double*>(&DoubleConstant::minus_zero)));
+}
+
+
 ExternalReference ExternalReference::address_of_negative_infinity() {
   return ExternalReference(reinterpret_cast<void*>(
       const_cast<double*>(&DoubleConstant::negative_infinity)));