Make context register implicit for CallInterfaceDescriptors

src/x64/interface-descriptors-x64.cc

 // Copyright 2012 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 "src/v8.h"
 
 #if V8_TARGET_ARCH_X64
 
 #include "src/interface-descriptors.h"
 
@@ skipping 48 matching lines @@
   return MathPowTaggedDescriptor::exponent();
 }
 
 
 const Register GrowArrayElementsDescriptor::ObjectRegister() { return rax; }
 const Register GrowArrayElementsDescriptor::KeyRegister() { return rbx; }
 
 
 void FastNewClosureDescriptor::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {
-  Register registers[] = {rsi, rbx};
+  Register registers[] = {rbx};
   data->InitializePlatformSpecific(arraysize(registers), registers);
 }
 
 
 void FastNewContextDescriptor::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {
-  Register registers[] = {rsi, rdi};
+  Register registers[] = {rdi};
   data->InitializePlatformSpecific(arraysize(registers), registers);
 }
 
 
 void TypeofDescriptor::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {
-  Register registers[] = {rsi, rbx};
+  Register registers[] = {rbx};
   data->InitializePlatformSpecific(arraysize(registers), registers);
 }
 
 
 void ToNumberDescriptor::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {
   // ToNumberStub invokes a function, and therefore needs a context.
-  Register registers[] = {rsi, rax};
+  Register registers[] = {rax};
   data->InitializePlatformSpecific(arraysize(registers), registers);
 }
 
 
 void NumberToStringDescriptor::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {
-  Register registers[] = {rsi, rax};
+  Register registers[] = {rax};
   data->InitializePlatformSpecific(arraysize(registers), registers);
 }
 
 
 void FastCloneShallowArrayDescriptor::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {
-  Register registers[] = {rsi, rax, rbx, rcx};
+  Register registers[] = {rax, rbx, rcx};
   data->InitializePlatformSpecific(arraysize(registers), registers);
 }
 
 
 void FastCloneShallowObjectDescriptor::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {
-  Register registers[] = {rsi, rax, rbx, rcx, rdx};
+  Register registers[] = {rax, rbx, rcx, rdx};
   data->InitializePlatformSpecific(arraysize(registers), registers);
 }
 
 
 void CreateAllocationSiteDescriptor::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {
-  Register registers[] = {rsi, rbx, rdx};
+  Register registers[] = {rbx, rdx};
   data->InitializePlatformSpecific(arraysize(registers), registers);
 }
 
 
 void CreateWeakCellDescriptor::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {
-  Register registers[] = {rsi, rbx, rdx, rdi};
+  Register registers[] = {rbx, rdx, rdi};
   data->InitializePlatformSpecific(arraysize(registers), registers);
 }
 
 
 void StoreArrayLiteralElementDescriptor::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {
-  Register registers[] = {rsi, rcx, rax};
+  Register registers[] = {rcx, rax};
   data->InitializePlatformSpecific(arraysize(registers), registers);
 }
 
 
 void CallFunctionDescriptor::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {
-  Register registers[] = {rsi, rdi};
+  Register registers[] = {rdi};
   data->InitializePlatformSpecific(arraysize(registers), registers);
 }
 
 
 void CallFunctionWithFeedbackDescriptor::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {
-  Register registers[] = {rsi, rdi, rdx};
+  Register registers[] = {rdi, rdx};
   data->InitializePlatformSpecific(arraysize(registers), registers);
 }
 
 
 void CallFunctionWithFeedbackAndVectorDescriptor::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {
-  Register registers[] = {rsi, rdi, rdx, rbx};
+  Register registers[] = {rdi, rdx, rbx};
   data->InitializePlatformSpecific(arraysize(registers), registers);
 }
 
 
 void CallConstructDescriptor::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {
   // rax : number of arguments
   // rbx : feedback vector
   // rdx : (only if rbx is not the megamorphic symbol) slot in feedback
   //       vector (Smi)
   // rdi : constructor function
   // TODO(turbofan): So far we don't gather type feedback and hence skip the
   // slot parameter, but ArrayConstructStub needs the vector to be undefined.
-  Register registers[] = {rsi, rax, rdi, rbx};
+  Register registers[] = {rax, rdi, rbx};
   data->InitializePlatformSpecific(arraysize(registers), registers);
 }
 
 
 void RegExpConstructResultDescriptor::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {
-  Register registers[] = {rsi, rcx, rbx, rax};
+  Register registers[] = {rcx, rbx, rax};
   data->InitializePlatformSpecific(arraysize(registers), registers);
 }
 
 
 void TransitionElementsKindDescriptor::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {
-  Register registers[] = {rsi, rax, rbx};
+  Register registers[] = {rax, rbx};
   data->InitializePlatformSpecific(arraysize(registers), registers);
 }
 
 
 void AllocateHeapNumberDescriptor::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {
-  // register state
-  // rsi -- context
-  Register registers[] = {rsi};
-  data->InitializePlatformSpecific(arraysize(registers), registers, nullptr);
+  data->InitializePlatformSpecific(0, nullptr, nullptr);
 }
 
 
 void ArrayConstructorConstantArgCountDescriptor::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {
   // register state
   // rax -- number of arguments
   // rdi -- function
   // rbx -- allocation site with elements kind
-  Register registers[] = {rsi, rdi, rbx};
+  Register registers[] = {rdi, rbx};
   data->InitializePlatformSpecific(arraysize(registers), registers);
 }
 
 
 void ArrayConstructorDescriptor::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {
   // stack param count needs (constructor pointer, and single argument)
-  Register registers[] = {rsi, rdi, rbx, rax};
+  Register registers[] = {rdi, rbx, rax};
   data->InitializePlatformSpecific(arraysize(registers), registers);
 }
 
 
 void InternalArrayConstructorConstantArgCountDescriptor::
     InitializePlatformSpecific(CallInterfaceDescriptorData* data) {
   // register state
-  // rsi -- context
   // rax -- number of arguments
   // rdi -- constructor function
-  Register registers[] = {rsi, rdi};
+  Register registers[] = {rdi};
   data->InitializePlatformSpecific(arraysize(registers), registers);
 }
 
 
 void InternalArrayConstructorDescriptor::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {
   // stack param count needs (constructor pointer, and single argument)
-  Register registers[] = {rsi, rdi, rax};
+  Register registers[] = {rdi, rax};
   data->InitializePlatformSpecific(arraysize(registers), registers);
 }
 
 
 void CompareDescriptor::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {
-  Register registers[] = {rsi, rdx, rax};
+  Register registers[] = {rdx, rax};
   data->InitializePlatformSpecific(arraysize(registers), registers);
 }
 
 
 void CompareNilDescriptor::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {
-  Register registers[] = {rsi, rax};
+  Register registers[] = {rax};
   data->InitializePlatformSpecific(arraysize(registers), registers);
 }
 
 
 void ToBooleanDescriptor::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {
-  Register registers[] = {rsi, rax};
+  Register registers[] = {rax};
   data->InitializePlatformSpecific(arraysize(registers), registers);
 }
 
 
 void BinaryOpDescriptor::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {
-  Register registers[] = {rsi, rdx, rax};
+  Register registers[] = {rdx, rax};
   data->InitializePlatformSpecific(arraysize(registers), registers);
 }
 
 
 void BinaryOpWithAllocationSiteDescriptor::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {
-  Register registers[] = {rsi, rcx, rdx, rax};
+  Register registers[] = {rcx, rdx, rax};
   data->InitializePlatformSpecific(arraysize(registers), registers);
 }
 
 
 void StringAddDescriptor::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {
-  Register registers[] = {rsi, rdx, rax};
+  Register registers[] = {rdx, rax};
   data->InitializePlatformSpecific(arraysize(registers), registers);
 }
 
 
 void KeyedDescriptor::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {
   Register registers[] = {
-      rsi,  // context
       rcx,  // key
   };
   data->InitializePlatformSpecific(arraysize(registers), registers);
 }
 
 
 void NamedDescriptor::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {
   Register registers[] = {
-      rsi,  // context
       rcx,  // name
   };
   data->InitializePlatformSpecific(arraysize(registers), registers);
 }
 
 
 void CallHandlerDescriptor::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {
   Register registers[] = {
-      rsi,  // context
       rdx,  // receiver
   };
   data->InitializePlatformSpecific(arraysize(registers), registers);
 }
 
 
 void ArgumentAdaptorDescriptor::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {
   Register registers[] = {
-      rsi,  // context
       rdi,  // JSFunction
       rax,  // actual number of arguments
       rbx,  // expected number of arguments
   };
   data->InitializePlatformSpecific(arraysize(registers), registers);
 }
 
 
 void ApiFunctionDescriptor::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {
   Register registers[] = {
-      rsi,  // context
       rdi,  // callee
       rbx,  // call_data
       rcx,  // holder
       rdx,  // api_function_address
       rax,  // actual number of arguments
   };
   data->InitializePlatformSpecific(arraysize(registers), registers);
 }
 
 
 void ApiAccessorDescriptor::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {
   Register registers[] = {
-      rsi,  // context
       rdi,  // callee
       rbx,  // call_data
       rcx,  // holder
       rdx,  // api_function_address
   };
   data->InitializePlatformSpecific(arraysize(registers), registers);
 }
 
 
 void MathRoundVariantDescriptor::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {
   Register registers[] = {
-      rsi,  // context
       rdi,  // math rounding function
       rdx,  // vector slot id
   };
   data->InitializePlatformSpecific(arraysize(registers), registers);
 }
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_X64