Multiple stubs can point to the same calling convention.

src/arm/code-stubs-arm.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_ARM
 
 #include "src/bootstrapper.h"
 #include "src/code-stubs.h"
 #include "src/codegen.h"
 #include "src/ic/handler-compiler.h"
 #include "src/isolate.h"
 #include "src/jsregexp.h"
 #include "src/regexp-macro-assembler.h"
 #include "src/runtime.h"
 
 namespace v8 {
 namespace internal {
 
 
-void FastNewClosureStub::InitializeInterfaceDescriptor(
-    CodeStubInterfaceDescriptor* descriptor) {
-  Register registers[] = { cp, r2 };
-  descriptor->Initialize(
-      MajorKey(), arraysize(registers), registers,
-      Runtime::FunctionForId(Runtime::kNewClosureFromStubFailure)->entry);
-}
-
-
-void FastNewContextStub::InitializeInterfaceDescriptor(
-    CodeStubInterfaceDescriptor* descriptor) {
-  Register registers[] = { cp, r1 };
-  descriptor->Initialize(MajorKey(), arraysize(registers), registers);
-}
-
-
-void ToNumberStub::InitializeInterfaceDescriptor(
-    CodeStubInterfaceDescriptor* descriptor) {
-  Register registers[] = { cp, r0 };
-  descriptor->Initialize(MajorKey(), arraysize(registers), registers);
-}
-
-
-void NumberToStringStub::InitializeInterfaceDescriptor(
-    CodeStubInterfaceDescriptor* descriptor) {
-  Register registers[] = { cp, r0 };
-  descriptor->Initialize(
-      MajorKey(), arraysize(registers), registers,
-      Runtime::FunctionForId(Runtime::kNumberToStringRT)->entry);
-}
-
-
-void FastCloneShallowArrayStub::InitializeInterfaceDescriptor(
-    CodeStubInterfaceDescriptor* descriptor) {
-  Register registers[] = { cp, r3, r2, r1 };
-  Representation representations[] = {
-    Representation::Tagged(),
-    Representation::Tagged(),
-    Representation::Smi(),
-    Representation::Tagged() };
-  descriptor->Initialize(
-      MajorKey(), arraysize(registers), registers,
-      Runtime::FunctionForId(Runtime::kCreateArrayLiteralStubBailout)->entry,
-      representations);
-}
-
-
-void FastCloneShallowObjectStub::InitializeInterfaceDescriptor(
-    CodeStubInterfaceDescriptor* descriptor) {
-  Register registers[] = { cp, r3, r2, r1, r0 };
-  descriptor->Initialize(
-      MajorKey(), arraysize(registers), registers,
-      Runtime::FunctionForId(Runtime::kCreateObjectLiteral)->entry);
-}
-
-
-void CreateAllocationSiteStub::InitializeInterfaceDescriptor(
-    CodeStubInterfaceDescriptor* descriptor) {
-  Register registers[] = { cp, r2, r3 };
-  descriptor->Initialize(MajorKey(), arraysize(registers), registers);
-}
-
-
-void CallFunctionStub::InitializeInterfaceDescriptor(
-    CodeStubInterfaceDescriptor* descriptor) {
-  // r1  function    the function to call
-  Register registers[] = {cp, r1};
-  descriptor->Initialize(MajorKey(), arraysize(registers), registers);
-}
-
-
-void CallConstructStub::InitializeInterfaceDescriptor(
-    CodeStubInterfaceDescriptor* descriptor) {
-  // r0 : number of arguments
-  // r1 : the function to call
-  // r2 : feedback vector
-  // r3 : (only if r2 is not the megamorphic symbol) slot in feedback
-  //      vector (Smi)
-  // 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[] = {cp, r0, r1, r2};
-  descriptor->Initialize(MajorKey(), arraysize(registers), registers);
-}
-
-
-void RegExpConstructResultStub::InitializeInterfaceDescriptor(
-    CodeStubInterfaceDescriptor* descriptor) {
-  Register registers[] = { cp, r2, r1, r0 };
-  descriptor->Initialize(
-      MajorKey(), arraysize(registers), registers,
-      Runtime::FunctionForId(Runtime::kRegExpConstructResult)->entry);
-}
-
-
-void TransitionElementsKindStub::InitializeInterfaceDescriptor(
-    CodeStubInterfaceDescriptor* descriptor) {
-  Register registers[] = { cp, r0, r1 };
-  Address entry =
-      Runtime::FunctionForId(Runtime::kTransitionElementsKind)->entry;
-  descriptor->Initialize(MajorKey(), arraysize(registers), registers,
-                         FUNCTION_ADDR(entry));
-}
-
-
-void CompareNilICStub::InitializeInterfaceDescriptor(
-    CodeStubInterfaceDescriptor* descriptor) {
-  Register registers[] = { cp, r0 };
-  descriptor->Initialize(MajorKey(), arraysize(registers), registers,
-                         FUNCTION_ADDR(CompareNilIC_Miss));
-  descriptor->SetMissHandler(
-      ExternalReference(IC_Utility(IC::kCompareNilIC_Miss), isolate()));
-}
-
-
 static void InitializeArrayConstructorDescriptor(
-    CodeStub::Major major, CodeStubInterfaceDescriptor* descriptor,
+    Isolate* isolate, CodeStub::Major major,
+    CodeStubInterfaceDescriptor* descriptor,
     int constant_stack_parameter_count) {
-  // register state
-  // cp -- context
-  // r0 -- number of arguments
-  // r1 -- function
-  // r2 -- allocation site with elements kind
   Address deopt_handler = Runtime::FunctionForId(
       Runtime::kArrayConstructor)->entry;
 
   if (constant_stack_parameter_count == 0) {
-    Register registers[] = { cp, r1, r2 };
-    descriptor->Initialize(major, arraysize(registers), registers,
-                           deopt_handler, NULL, constant_stack_parameter_count,
+    CallInterfaceDescriptor* call_descriptor = isolate->call_descriptor(
+        CallDescriptorKey::ArrayConstructorConstantArgCountCall);
+    descriptor->Initialize(major, call_descriptor, deopt_handler,
+                           constant_stack_parameter_count,
                            JS_FUNCTION_STUB_MODE);
   } else {
-    // stack param count needs (constructor pointer, and single argument)
-    Register registers[] = { cp, r1, r2, r0 };
-    Representation representations[] = {
-        Representation::Tagged(),
-        Representation::Tagged(),
-        Representation::Tagged(),
-        Representation::Integer32() };
-    descriptor->Initialize(major, arraysize(registers), registers, r0,
-                           deopt_handler, representations,
+    CallInterfaceDescriptor* call_descriptor =
+        isolate->call_descriptor(CallDescriptorKey::ArrayConstructorCall);
+    descriptor->Initialize(major, call_descriptor, r0, deopt_handler,
                            constant_stack_parameter_count,
                            JS_FUNCTION_STUB_MODE, PASS_ARGUMENTS);
   }
 }
 
 
 static void InitializeInternalArrayConstructorDescriptor(
-    CodeStub::Major major, CodeStubInterfaceDescriptor* descriptor,
+    Isolate* isolate, CodeStub::Major major,
+    CodeStubInterfaceDescriptor* descriptor,
     int constant_stack_parameter_count) {
-  // register state
-  // cp -- context
-  // r0 -- number of arguments
-  // r1 -- constructor function
   Address deopt_handler = Runtime::FunctionForId(
       Runtime::kInternalArrayConstructor)->entry;
 
   if (constant_stack_parameter_count == 0) {
-    Register registers[] = { cp, r1 };
-    descriptor->Initialize(major, arraysize(registers), registers,
-                           deopt_handler, NULL, constant_stack_parameter_count,
+    CallInterfaceDescriptor* call_descriptor = isolate->call_descriptor(
+        CallDescriptorKey::InternalArrayConstructorConstantArgCountCall);
+    descriptor->Initialize(major, call_descriptor, deopt_handler,
+                           constant_stack_parameter_count,
                            JS_FUNCTION_STUB_MODE);
   } else {
-    // stack param count needs (constructor pointer, and single argument)
-    Register registers[] = { cp, r1, r0 };
-    Representation representations[] = {
-        Representation::Tagged(),
-        Representation::Tagged(),
-        Representation::Integer32() };
-    descriptor->Initialize(major, arraysize(registers), registers, r0,
-                           deopt_handler, representations,
+    CallInterfaceDescriptor* call_descriptor = isolate->call_descriptor(
+        CallDescriptorKey::InternalArrayConstructorCall);
+    descriptor->Initialize(major, call_descriptor, r0, deopt_handler,
                            constant_stack_parameter_count,
                            JS_FUNCTION_STUB_MODE, PASS_ARGUMENTS);
   }
 }
 
 
 void ArrayNoArgumentConstructorStub::InitializeInterfaceDescriptor(
     CodeStubInterfaceDescriptor* descriptor) {
-  InitializeArrayConstructorDescriptor(MajorKey(), descriptor, 0);
+  InitializeArrayConstructorDescriptor(isolate(), MajorKey(), descriptor, 0);
 }
 
 
 void ArraySingleArgumentConstructorStub::InitializeInterfaceDescriptor(
     CodeStubInterfaceDescriptor* descriptor) {
-  InitializeArrayConstructorDescriptor(MajorKey(), descriptor, 1);
+  InitializeArrayConstructorDescriptor(isolate(), MajorKey(), descriptor, 1);
 }
 
 
 void ArrayNArgumentsConstructorStub::InitializeInterfaceDescriptor(
     CodeStubInterfaceDescriptor* descriptor) {
-  InitializeArrayConstructorDescriptor(MajorKey(), descriptor, -1);
-}
-
-
-void ToBooleanStub::InitializeInterfaceDescriptor(
-    CodeStubInterfaceDescriptor* descriptor) {
-  Register registers[] = { cp, r0 };
-  descriptor->Initialize(MajorKey(), arraysize(registers), registers,
-                         FUNCTION_ADDR(ToBooleanIC_Miss));
-  descriptor->SetMissHandler(
-      ExternalReference(IC_Utility(IC::kToBooleanIC_Miss), isolate()));
+  InitializeArrayConstructorDescriptor(isolate(), MajorKey(), descriptor, -1);
 }
 
 
 void InternalArrayNoArgumentConstructorStub::InitializeInterfaceDescriptor(
     CodeStubInterfaceDescriptor* descriptor) {
-  InitializeInternalArrayConstructorDescriptor(MajorKey(), descriptor, 0);
+  InitializeInternalArrayConstructorDescriptor(isolate(), MajorKey(),
+                                               descriptor, 0);
 }
 
 
 void InternalArraySingleArgumentConstructorStub::InitializeInterfaceDescriptor(
     CodeStubInterfaceDescriptor* descriptor) {
-  InitializeInternalArrayConstructorDescriptor(MajorKey(), descriptor, 1);
+  InitializeInternalArrayConstructorDescriptor(isolate(), MajorKey(),
+                                               descriptor, 1);
 }
 
 
 void InternalArrayNArgumentsConstructorStub::InitializeInterfaceDescriptor(
     CodeStubInterfaceDescriptor* descriptor) {
-  InitializeInternalArrayConstructorDescriptor(MajorKey(), descriptor, -1);
+  InitializeInternalArrayConstructorDescriptor(isolate(), MajorKey(),
+                                               descriptor, -1);
 }
 
 
-void BinaryOpICStub::InitializeInterfaceDescriptor(
-    CodeStubInterfaceDescriptor* descriptor) {
-  Register registers[] = { cp, r1, r0 };
-  descriptor->Initialize(MajorKey(), arraysize(registers), registers,
-                         FUNCTION_ADDR(BinaryOpIC_Miss));
-  descriptor->SetMissHandler(
-      ExternalReference(IC_Utility(IC::kBinaryOpIC_Miss), isolate()));
-}
-
-
-void BinaryOpWithAllocationSiteStub::InitializeInterfaceDescriptor(
-    CodeStubInterfaceDescriptor* descriptor) {
-  Register registers[] = { cp, r2, r1, r0 };
-  descriptor->Initialize(MajorKey(), arraysize(registers), registers,
-                         FUNCTION_ADDR(BinaryOpIC_MissWithAllocationSite));
-}
-
-
-void StringAddStub::InitializeInterfaceDescriptor(
-    CodeStubInterfaceDescriptor* descriptor) {
-  Register registers[] = { cp, r1, r0 };
-  descriptor->Initialize(MajorKey(), arraysize(registers), registers,
-                         Runtime::FunctionForId(Runtime::kStringAdd)->entry);
-}
-
-
 #define __ ACCESS_MASM(masm)
 
 
 static void EmitIdenticalObjectComparison(MacroAssembler* masm,
                                           Label* slow,
                                           Condition cond);
 static void EmitSmiNonsmiComparison(MacroAssembler* masm,
                                     Register lhs,
                                     Register rhs,
                                     Label* lhs_not_nan,
@@ skipping 1510 matching lines @@
   Register receiver = LoadConvention::ReceiverRegister();
 
   NamedLoadHandlerCompiler::GenerateLoadFunctionPrototype(masm, receiver, r3,
                                                           r4, &miss);
   __ bind(&miss);
   PropertyAccessCompiler::TailCallBuiltin(
       masm, PropertyAccessCompiler::MissBuiltin(Code::LOAD_IC));
 }
 
 
-Register InstanceofStub::left() { return r0; }
-
-
-Register InstanceofStub::right() { return r1; }
-
-
 void ArgumentsAccessStub::GenerateReadElement(MacroAssembler* masm) {
   // The displacement is the offset of the last parameter (if any)
   // relative to the frame pointer.
   const int kDisplacement =
       StandardFrameConstants::kCallerSPOffset - kPointerSize;
 
   // Check that the key is a smi.
   Label slow;
   __ JumpIfNotSmi(r1, &slow);
 
@@ skipping 3206 matching lines @@
                               MemOperand(fp, 6 * kPointerSize),
                               NULL);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_ARM