Stop passing location argument to run time calls, since it is stored in the pc

runtime/vm/flow_graph_compiler_x64.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/globals.h"  // Needed here to get TARGET_ARCH_X64.
 #if defined(TARGET_ARCH_X64)
 
 #include "vm/flow_graph_compiler.h"
 
 #include "lib/error.h"
@@ skipping 193 matching lines @@
   ASSERT(type.IsInstantiated());
   const Class& type_class = Class::Handle(type.type_class());
   ASSERT(!type_class.HasTypeArguments());
 
   const Register kInstanceReg = RAX;
   Label compare_classes;
   __ testq(kInstanceReg, Immediate(kSmiTagMask));
   __ j(NOT_ZERO, &compare_classes, Assembler::kNearJump);
   // Instance is Smi, check directly.
   const Class& smi_class = Class::Handle(Smi::Class());
-  // TODO(regis): We should introduce a SmiType.
   Error& malformed_error = Error::Handle();
   if (smi_class.IsSubtypeOf(TypeArguments::Handle(),
                             type_class,
                             TypeArguments::Handle(),
                             &malformed_error)) {
     __ jmp(is_instance_lbl);
   } else {
     __ jmp(is_not_instance_lbl);
   }
   // Compare if the classes are equal.
@@ skipping 249 matching lines @@
 
   // Generate inline instanceof test.
   SubtypeTestCache& test_cache = SubtypeTestCache::ZoneHandle();
   test_cache = GenerateInlineInstanceof(cid, token_pos, type,
                                         &is_instance, &is_not_instance);
 
   // Generate runtime call.
   __ movq(RDX, Address(RSP, 0));  // Get instantiator type arguments.
   __ movq(RCX, Address(RSP, kWordSize));  // Get instantiator.
   __ PushObject(Object::ZoneHandle());  // Make room for the result.
-  __ pushq(Immediate(Smi::RawValue(token_pos)));  // Source location.
   __ pushq(Immediate(Smi::RawValue(cid)));  // Computation id.
   __ pushq(RAX);  // Push the instance.
   __ PushObject(type);  // Push the type.
   __ pushq(RCX);  // TODO(srdjan): Pass instantiator instead of null.
   __ pushq(RDX);  // Instantiator type arguments.
   __ LoadObject(RAX, test_cache);
   __ pushq(RAX);
   GenerateCallRuntime(cid, token_pos, try_index, kInstanceofRuntimeEntry);
-  // Pop the two parameters supplied to the runtime entry. The result of the
+  // Pop the parameters supplied to the runtime entry. The result of the
   // instanceof runtime call will be left as the result of the operation.
-  __ Drop(7);
+  __ Drop(6);
   Label done;
   if (negate_result) {
     __ popq(RDX);
     __ LoadObject(RAX, bool_true());
     __ cmpq(RDX, RAX);
     __ j(NOT_EQUAL, &done, Assembler::kNearJump);
     __ LoadObject(RAX, bool_false());
   } else {
     __ popq(RAX);
   }
@@ skipping 43 matching lines @@
   Label is_assignable, runtime_call;
   __ cmpq(RAX, raw_null);
   __ j(EQUAL, &is_assignable);
 
   // Generate throw new TypeError() if the type is malformed.
   if (dst_type.IsMalformed()) {
     const Error& error = Error::Handle(dst_type.malformed_error());
     const String& error_message = String::ZoneHandle(
         String::NewSymbol(error.ToErrorCString()));
     __ PushObject(Object::ZoneHandle());  // Make room for the result.
-    __ pushq(Immediate(Smi::RawValue(token_pos)));  // Source location.
     __ pushq(RAX);  // Push the source object.
     __ PushObject(dst_name);  // Push the name of the destination.
     __ PushObject(error_message);
     GenerateCallRuntime(cid,
                         token_pos,
                         try_index,
                         kMalformedTypeErrorRuntimeEntry);
     // We should never return here.
     __ int3();
 
     __ Bind(&is_assignable);  // For a null object.
     return;
   }
 
   // Generate inline type check, linking to runtime call if not assignable.
   SubtypeTestCache& test_cache = SubtypeTestCache::ZoneHandle();
   test_cache = GenerateInlineInstanceof(cid, token_pos, dst_type,
                                         &is_assignable, &runtime_call);
 
   __ Bind(&runtime_call);
   __ movq(RDX, Address(RSP, 0));  // Get instantiator type arguments.
   __ movq(RCX, Address(RSP, kWordSize));  // Get instantiator.
   __ PushObject(Object::ZoneHandle());  // Make room for the result.
-  __ pushq(Immediate(Smi::RawValue(token_pos)));  // Source location.
   __ pushq(Immediate(Smi::RawValue(cid)));  // Computation id.
   __ pushq(RAX);  // Push the source object.
   __ PushObject(dst_type);  // Push the type of the destination.
   __ pushq(RCX);  // Instantiator.
   __ pushq(RDX);  // Instantiator type arguments.
   __ PushObject(dst_name);  // Push the name of the destination.
   __ LoadObject(RAX, test_cache);
   __ pushq(RAX);
   GenerateCallRuntime(cid,
                       token_pos,
                       try_index,
                       kTypeCheckRuntimeEntry);
   // Pop the parameters supplied to the runtime entry. The result of the
   // type check runtime call is the checked value.
-  __ Drop(8);
+  __ Drop(7);
   __ popq(RAX);
 
   __ Bind(&is_assignable);
   __ popq(RDX);  // Remove pushed instantiator type arguments..
   __ popq(RCX);  // Remove pushed instantiator.
 }
 
 
 void FlowGraphCompiler::EmitInstructionPrologue(Instruction* instr) {
   LocationSummary* locs = instr->locs();
@@ skipping 469 matching lines @@
   __ cvtsi2sd(result, temp);
   __ Bind(&done);
 }
 
 
 #undef __
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_X64