Make context register implicit for CallInterfaceDescriptors

src/arm64/lithium-arm64.cc

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <sstream>
 
 #include "src/v8.h"
 
 #include "src/arm64/lithium-codegen-arm64.h"
 #include "src/hydrogen-osr.h"
@@ skipping 1032 matching lines @@
   return MarkAsCall(DefineFixed(result, x0), instr);
 }
 
 
 LInstruction* LChunkBuilder::DoCallWithDescriptor(
     HCallWithDescriptor* instr) {
   CallInterfaceDescriptor descriptor = instr->descriptor();
 
   LOperand* target = UseRegisterOrConstantAtStart(instr->target());
   ZoneList<LOperand*> ops(instr->OperandCount(), zone());
+  // Target
   ops.Add(target, zone());
-  for (int i = 1; i < instr->OperandCount(); i++) {
-    LOperand* op =
-        UseFixed(instr->OperandAt(i), descriptor.GetParameterRegister(i - 1));
+  // Context
+  LOperand* op = UseFixed(instr->OperandAt(1), cp);
+  ops.Add(op, zone());
+  // Other register parameters
+  for (int i = LCallWithDescriptor::kImplicitRegisterParameterCount;
+       i < instr->OperandCount(); i++) {
+    op =
+        UseFixed(instr->OperandAt(i),
+                 descriptor.GetRegisterParameter(
+                     i - LCallWithDescriptor::kImplicitRegisterParameterCount));
     ops.Add(op, zone());
   }
 
   LCallWithDescriptor* result = new(zone()) LCallWithDescriptor(descriptor,
                                                                 ops,
                                                                 zone());
   return MarkAsCall(DefineFixed(result, x0), instr);
 }
 
 
@@ skipping 940 matching lines @@
 LInstruction* LChunkBuilder::DoParameter(HParameter* instr) {
   LParameter* result = new(zone()) LParameter;
   if (instr->kind() == HParameter::STACK_PARAMETER) {
     int spill_index = chunk_->GetParameterStackSlot(instr->index());
     return DefineAsSpilled(result, spill_index);
   } else {
     DCHECK(info()->IsStub());
     CallInterfaceDescriptor descriptor =
         info()->code_stub()->GetCallInterfaceDescriptor();
     int index = static_cast<int>(instr->index());
-    Register reg = descriptor.GetEnvironmentParameterRegister(index);
+    Register reg = descriptor.GetRegisterParameter(index);
     return DefineFixed(result, reg);
   }
 }
 
 
 LInstruction* LChunkBuilder::DoPower(HPower* instr) {
   DCHECK(instr->representation().IsDouble());
   // We call a C function for double power. It can't trigger a GC.
   // We need to use fixed result register for the call.
   Representation exponent_type = instr->right()->representation();
@@ skipping 747 matching lines @@
   LOperand* context = UseFixed(instr->context(), cp);
   LOperand* function = UseRegisterAtStart(instr->function());
   LAllocateBlockContext* result =
       new(zone()) LAllocateBlockContext(context, function);
   return MarkAsCall(DefineFixed(result, cp), instr);
 }
 
 
 }  // namespace internal
 }  // namespace v8