Implement LoadVMField, StoreVMField, AllocateObjectWithBoundsCheck, InstantiateTypeArguments on ia3…

runtime/vm/intermediate_language_x64.cc

Index: runtime/vm/intermediate_language_x64.cc
diff --git a/runtime/vm/intermediate_language_x64.cc b/runtime/vm/intermediate_language_x64.cc
index 12cf13e5b87cbc8bc43104ebbed27cd773b3d21a..17da6f316444786e7deb56072f5090f2134c86b4 100644
--- a/runtime/vm/intermediate_language_x64.cc
+++ b/runtime/vm/intermediate_language_x64.cc
@@ -821,7 +821,7 @@ void AllocateObjectWithBoundsCheckComp::EmitNativeCode(
 
 
 LocationSummary* LoadVMFieldComp::MakeLocationSummary() const {
-  return LocationSummary::Make(1, Location::RequiresRegister());
+  return LocationSummary::Make(1, Location::SameAsFirstInput());
 }
 
 
@@ -885,10 +885,8 @@ void InstantiateTypeArgumentsComp::EmitNativeCode(FlowGraphCompiler* compiler) {
     // TypeArguments).
     __ CompareClassId(instantiator_reg, kTypeArguments);
     __ j(NOT_EQUAL, &type_arguments_uninstantiated, Assembler::kNearJump);
-    Immediate arguments_length =
-        Immediate(Smi::RawValue(type_arguments().Length()));
     __ cmpq(FieldAddress(instantiator_reg, TypeArguments::length_offset()),
-        arguments_length);
+            Immediate(Smi::RawValue(len)));
     __ j(EQUAL, &type_arguments_instantiated, Assembler::kNearJump);
     __ Bind(&type_arguments_uninstantiated);
   }