Remove instantiator argument in generated code for type tests.

runtime/vm/intermediate_language_arm.cc

Index: runtime/vm/intermediate_language_arm.cc
diff --git a/runtime/vm/intermediate_language_arm.cc b/runtime/vm/intermediate_language_arm.cc
index 8d6e6c152e347dac455c99933c810b6ceacd06c5..9120195ffdee0154c7a9776b4290b32500fabcf6 100644
--- a/runtime/vm/intermediate_language_arm.cc
+++ b/runtime/vm/intermediate_language_arm.cc
@@ -345,13 +345,12 @@ void UnboxedConstantInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
 
 LocationSummary* AssertAssignableInstr::MakeLocationSummary(Zone* zone,
                                                             bool opt) const {
-  const intptr_t kNumInputs = 3;
+  const intptr_t kNumInputs = 2;
   const intptr_t kNumTemps = 0;
   LocationSummary* summary = new(zone) LocationSummary(
       zone, kNumInputs, kNumTemps, LocationSummary::kCall);
   summary->set_in(0, Location::RegisterLocation(R0));  // Value.
-  summary->set_in(1, Location::RegisterLocation(R2));  // Instantiator.
-  summary->set_in(2, Location::RegisterLocation(R1));  // Type arguments.
+  summary->set_in(1, Location::RegisterLocation(R1));  // Type arguments.
   summary->set_out(0, Location::RegisterLocation(R0));
   return summary;
 }
@@ -2275,13 +2274,12 @@ void StoreStaticFieldInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
 
 LocationSummary* InstanceOfInstr::MakeLocationSummary(Zone* zone,
                                                       bool opt) const {
-  const intptr_t kNumInputs = 3;
+  const intptr_t kNumInputs = 2;
   const intptr_t kNumTemps = 0;
   LocationSummary* summary = new(zone) LocationSummary(
       zone, kNumInputs, kNumTemps, LocationSummary::kCall);
   summary->set_in(0, Location::RegisterLocation(R0));
-  summary->set_in(1, Location::RegisterLocation(R2));
-  summary->set_in(2, Location::RegisterLocation(R1));
+  summary->set_in(1, Location::RegisterLocation(R1));
   summary->set_out(0, Location::RegisterLocation(R0));
   return summary;
 }
@@ -2289,8 +2287,7 @@ LocationSummary* InstanceOfInstr::MakeLocationSummary(Zone* zone,
 
 void InstanceOfInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
   ASSERT(locs()->in(0).reg() == R0);  // Value.
-  ASSERT(locs()->in(1).reg() == R2);  // Instantiator.
-  ASSERT(locs()->in(2).reg() == R1);  // Instantiator type arguments.
+  ASSERT(locs()->in(1).reg() == R1);  // Instantiator type arguments.
 
   compiler->GenerateInstanceOf(token_pos(),
                                deopt_id(),