[Interpreter] Add support for new local function context creation.

src/x87/builtins-x87.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.
 
 #if V8_TARGET_ARCH_X87
 
 #include "src/code-factory.h"
 #include "src/codegen.h"
 #include "src/deoptimizer.h"
 #include "src/full-codegen/full-codegen.h"
@@ skipping 647 matching lines @@
   // registers.
   __ LoadRoot(kInterpreterAccumulatorRegister, Heap::kUndefinedValueRootIndex);
   __ mov(kInterpreterRegisterFileRegister, ebp);
   __ sub(
       kInterpreterRegisterFileRegister,
       Immediate(kPointerSize + StandardFrameConstants::kFixedFrameSizeFromFp));
   __ mov(kInterpreterBytecodeOffsetRegister,
          Immediate(BytecodeArray::kHeaderSize - kHeapObjectTag));
   // Since the dispatch table root might be set after builtins are generated,
   // load directly from the roots table.
-  __ LoadRoot(kInterpreterDispatchTableRegister,
-              Heap::kInterpreterTableRootIndex);
-  __ add(kInterpreterDispatchTableRegister,
-         Immediate(FixedArray::kHeaderSize - kHeapObjectTag));
+  __ LoadRoot(ebx, Heap::kInterpreterTableRootIndex);
+  __ add(ebx, Immediate(FixedArray::kHeaderSize - kHeapObjectTag));
 
   // Push context as a stack located parameter to the bytecode handler.
-  DCHECK_EQ(-1, kInterpreterContextSpillSlot);
-  __ push(esi);
+  DCHECK_EQ(-1, kInterpreterDispatchTableSpillSlot);
+  __ push(ebx);
 
   // Dispatch to the first bytecode handler for the function.
-  __ movzx_b(esi, Operand(kInterpreterBytecodeArrayRegister,
+  __ movzx_b(eax, Operand(kInterpreterBytecodeArrayRegister,
                           kInterpreterBytecodeOffsetRegister, times_1, 0));
-  __ mov(esi, Operand(kInterpreterDispatchTableRegister, esi,
-                      times_pointer_size, 0));
+  __ mov(ebx, Operand(ebx, eax, times_pointer_size, 0));
+  // Restore undefined_value in accumulator (eax)
+  // TODO(rmcilroy): Remove this once we move the dispatch table back into a
+  // register.
+  __ mov(eax, Immediate(masm->isolate()->factory()->undefined_value()));
   // TODO(rmcilroy): Make dispatch table point to code entrys to avoid untagging
   // and header removal.
-  __ add(esi, Immediate(Code::kHeaderSize - kHeapObjectTag));
-  __ call(esi);
+  __ add(ebx, Immediate(Code::kHeaderSize - kHeapObjectTag));
+  __ call(ebx);
 }
 
 
 void Builtins::Generate_InterpreterExitTrampoline(MacroAssembler* masm) {
   // TODO(rmcilroy): List of things not currently dealt with here but done in
   // fullcodegen's EmitReturnSequence.
   //  - Supporting FLAG_trace for Runtime::TraceExit.
   //  - Support profiler (specifically decrementing profiling_counter
   //    appropriately and calling out to HandleInterrupts if necessary).
 
@@ skipping 1146 matching lines @@
 
   __ bind(&ok);
   __ ret(0);
 }
 
 #undef __
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_X87