Revert of [Interpreter] Rename GetCountOperand to GetRegisterCountOperand....

Revert of [Interpreter] Rename GetCountOperand to GetRegisterCountOperand. (patchset #1 id:20001 of https://codereview.chromium.org/1691433002/ )

Reason for revert:
[Sheriff] Breaks the tree:
https://build.chromium.org/p/client.v8/builders/V8%20Linux%20-%20builder/builds/13892

Blamelists are wrong because of overloaded master. The trybots on this CL might have been outdated by the time of commit... Please rebase and retry.

Original issue's description:
> [Interpreter] Rename GetCountOperand to GetRegisterCountOperand.
>
> Apparently, this BytecodeArrayIterator method was missed during the
> previous refactor. No other (collateral) change was done.
>
> BUG=v8:4280
> LOG=N
>
> Committed: https://crrev.com/3781ca79f5c48b55d7f0bf6df370ec11515a1466
> Cr-Commit-Position: refs/heads/master@{#33897}

TBR=oth@chromium.org,rmcilroy@chromium.org,mstarzinger@chromium.org,ssanfilippo@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:4280

Review URL: https://codereview.chromium.org/1690963002

Cr-Commit-Position: refs/heads/master@{#33900}

src/compiler/bytecode-graph-builder.cc

@@ -1050,7 +1050,7 @@ void BytecodeGraphBuilder::BuildCall() {
   Node* callee =
       environment()->LookupRegister(bytecode_iterator().GetRegisterOperand(0));
   interpreter::Register receiver = bytecode_iterator().GetRegisterOperand(1);
-  size_t arg_count = bytecode_iterator().GetRegisterCountOperand(2);
+  size_t arg_count = bytecode_iterator().GetCountOperand(2);
   VectorSlotPair feedback =
       CreateVectorSlotPair(bytecode_iterator().GetIndexOperand(3));
 
@@ -1070,7 +1070,7 @@ void BytecodeGraphBuilder::BuildCallJSRuntime() {
   Node* callee =
       BuildLoadNativeContextField(bytecode_iterator().GetIndexOperand(0));
   interpreter::Register receiver = bytecode_iterator().GetRegisterOperand(1);
-  size_t arg_count = bytecode_iterator().GetRegisterCountOperand(2);
+  size_t arg_count = bytecode_iterator().GetCountOperand(2);
 
   // Create node to perform the JS runtime call.
   const Operator* call =
@@ -1101,7 +1101,7 @@ void BytecodeGraphBuilder::BuildCallRuntime() {
   Runtime::FunctionId functionId =
       static_cast<Runtime::FunctionId>(bytecode_iterator().GetIndexOperand(0));
   interpreter::Register first_arg = bytecode_iterator().GetRegisterOperand(1);
-  size_t arg_count = bytecode_iterator().GetRegisterCountOperand(2);
+  size_t arg_count = bytecode_iterator().GetCountOperand(2);
 
   // Create node to perform the runtime call.
   const Operator* call = javascript()->CallRuntime(functionId, arg_count);
@@ -1118,7 +1118,7 @@ void BytecodeGraphBuilder::BuildCallRuntimeForPair() {
   Runtime::FunctionId functionId =
       static_cast<Runtime::FunctionId>(bytecode_iterator().GetIndexOperand(0));
   interpreter::Register first_arg = bytecode_iterator().GetRegisterOperand(1);
-  size_t arg_count = bytecode_iterator().GetRegisterCountOperand(2);
+  size_t arg_count = bytecode_iterator().GetCountOperand(2);
   interpreter::Register first_return =
       bytecode_iterator().GetRegisterOperand(3);
 
@@ -1157,7 +1157,7 @@ void BytecodeGraphBuilder::BuildCallConstruct() {
   FrameStateBeforeAndAfter states(this);
   interpreter::Register callee = bytecode_iterator().GetRegisterOperand(0);
   interpreter::Register first_arg = bytecode_iterator().GetRegisterOperand(1);
-  size_t arg_count = bytecode_iterator().GetRegisterCountOperand(2);
+  size_t arg_count = bytecode_iterator().GetCountOperand(2);
 
   // TODO(turbofan): Pass the feedback here.
   const Operator* call = javascript()->CallConstruct(

src/interpreter/bytecode-array-iterator.cc

@@ -63,7 +63,8 @@ int8_t BytecodeArrayIterator::GetImmediateOperand(int operand_index) const {
   return static_cast<int8_t>(operand);
 }
 
-int BytecodeArrayIterator::GetRegisterCountOperand(int operand_index) const {
+
+int BytecodeArrayIterator::GetCountOperand(int operand_index) const {
   OperandSize size =
       Bytecodes::GetOperandSize(current_bytecode(), operand_index);
   OperandType type = (size == OperandSize::kByte) ? OperandType::kRegCount8
@@ -130,7 +131,7 @@ int BytecodeArrayIterator::GetRegisterOperandRange(int operand_index) const {
         OperandType next_operand_type =
             Bytecodes::GetOperandType(current_bytecode(), operand_index + 1);
         if (Bytecodes::IsRegisterCountOperandType(next_operand_type)) {
-          return GetRegisterCountOperand(operand_index + 1);
+          return GetCountOperand(operand_index + 1);
         }
       }
       return 1;

src/interpreter/bytecode-array-iterator.h

@@ -29,7 +29,7 @@ class BytecodeArrayIterator {
 
   int8_t GetImmediateOperand(int operand_index) const;
   int GetIndexOperand(int operand_index) const;
-  int GetRegisterCountOperand(int operand_index) const;
+  int GetCountOperand(int operand_index) const;
   Register GetRegisterOperand(int operand_index) const;
   int GetRegisterOperandRange(int operand_index) const;
   Handle<Object> GetConstantForIndexOperand(int operand_index) const;

test/unittests/interpreter/bytecode-array-iterator-unittest.cc

@@ -95,7 +95,7 @@ TEST_F(BytecodeArrayIteratorTest, IteratesBytecodeArray) {
   CHECK_EQ(static_cast<Runtime::FunctionId>(iterator.GetIndexOperand(0)),
            Runtime::kLoadIC_Miss);
   CHECK_EQ(iterator.GetRegisterOperand(1).index(), reg_0.index());
-  CHECK_EQ(iterator.GetRegisterCountOperand(2), 1);
+  CHECK_EQ(iterator.GetCountOperand(2), 1);
   CHECK(!iterator.done());
   iterator.Advance();