Add support for IncrementCounter in Hydrogen.

src/mips/lithium-codegen-mips.cc

Index: src/mips/lithium-codegen-mips.cc
diff --git a/src/mips/lithium-codegen-mips.cc b/src/mips/lithium-codegen-mips.cc
index 5cf1d59e490840a6d12f1fee2dc324b882b32475..977982d21b87b3491500b6902a255717c6d02d2a 100644
--- a/src/mips/lithium-codegen-mips.cc
+++ b/src/mips/lithium-codegen-mips.cc
@@ -1647,6 +1647,11 @@ void LCodeGen::DoConstantD(LConstantD* instr) {
 }
 
 
+void LCodeGen::DoConstantE(LConstantE* instr) {
+  __ li(ToRegister(instr->result()), Operand(instr->value()));
+}
+
+
 void LCodeGen::DoConstantT(LConstantT* instr) {
   Handle<Object> value = instr->value();
   AllowDeferredHandleDereference smi_check;
@@ -2867,6 +2872,13 @@ void LCodeGen::DoLoadNamedField(LLoadNamedField* instr) {
   HObjectAccess access = instr->hydrogen()->access();
   int offset = access.offset();
   Register object = ToRegister(instr->object());
+
+  if (access.IsExternalMemory()) {
+    Register result = ToRegister(instr->result());
+    __ lw(result, MemOperand(object, offset));
+    return;
+  }
+
   if (instr->hydrogen()->representation().IsDouble()) {
     DoubleRegister result = ToDoubleRegister(instr->result());
     __ ldc1(result, FieldMemOperand(object, offset));
@@ -4104,6 +4116,12 @@ void LCodeGen::DoStoreNamedField(LStoreNamedField* instr) {
   HObjectAccess access = instr->hydrogen()->access();
   int offset = access.offset();
 
+  if (access.IsExternalMemory()) {
+    Register value = ToRegister(instr->value());
+    __ sw(value, MemOperand(object, offset));
+    return;
+  }
+
   Handle<Map> transition = instr->transition();
 
   if (FLAG_track_heap_object_fields && representation.IsHeapObject()) {