[regexp] Remove unused code

src/crankshaft/hydrogen.cc

Index: src/crankshaft/hydrogen.cc
diff --git a/src/crankshaft/hydrogen.cc b/src/crankshaft/hydrogen.cc
index ea10da4e4a774838bef3c55db024fb170ab19a73..7182b6586c9f4a17af0bffc7b13373a80a4a4065 100644
--- a/src/crankshaft/hydrogen.cc
+++ b/src/crankshaft/hydrogen.cc
@@ -1844,67 +1844,6 @@ HValue* HGraphBuilder::BuildCreateIterResultObject(HValue* value,
 }
 
 
-HValue* HGraphBuilder::BuildRegExpConstructResult(HValue* length,
-                                                  HValue* index,
-                                                  HValue* input) {
-  NoObservableSideEffectsScope scope(this);
-  HConstant* max_length = Add<HConstant>(JSArray::kInitialMaxFastElementArray);
-  Add<HBoundsCheck>(length, max_length);
-
-  // Generate size calculation code here in order to make it dominate
-  // the JSRegExpResult allocation.
-  ElementsKind elements_kind = FAST_ELEMENTS;
-  HValue* size = BuildCalculateElementsSize(elements_kind, length);
-
-  // Allocate the JSRegExpResult and the FixedArray in one step.
-  HValue* result =
-      Add<HAllocate>(Add<HConstant>(JSRegExpResult::kSize), HType::JSArray(),
-                     NOT_TENURED, JS_ARRAY_TYPE, graph()->GetConstant0());
-
-  // Initialize the JSRegExpResult header.
-  HValue* native_context = Add<HLoadNamedField>(
-      context(), nullptr,
-      HObjectAccess::ForContextSlot(Context::NATIVE_CONTEXT_INDEX));
-  Add<HStoreNamedField>(
-      result, HObjectAccess::ForMap(),
-      Add<HLoadNamedField>(
-          native_context, nullptr,
-          HObjectAccess::ForContextSlot(Context::REGEXP_RESULT_MAP_INDEX)));
-  HConstant* empty_fixed_array =
-      Add<HConstant>(isolate()->factory()->empty_fixed_array());
-  Add<HStoreNamedField>(
-      result, HObjectAccess::ForJSArrayOffset(JSArray::kPropertiesOffset),
-      empty_fixed_array);
-  Add<HStoreNamedField>(
-      result, HObjectAccess::ForJSArrayOffset(JSArray::kElementsOffset),
-      empty_fixed_array);
-  Add<HStoreNamedField>(
-      result, HObjectAccess::ForJSArrayOffset(JSArray::kLengthOffset), length);
-
-  // Initialize the additional fields.
-  Add<HStoreNamedField>(
-      result, HObjectAccess::ForJSArrayOffset(JSRegExpResult::kIndexOffset),
-      index);
-  Add<HStoreNamedField>(
-      result, HObjectAccess::ForJSArrayOffset(JSRegExpResult::kInputOffset),
-      input);
-
-  // Allocate and initialize the elements header.
-  HAllocate* elements = BuildAllocateElements(elements_kind, size);
-  BuildInitializeElementsHeader(elements, elements_kind, length);
-
-  Add<HStoreNamedField>(
-      result, HObjectAccess::ForJSArrayOffset(JSArray::kElementsOffset),
-      elements);
-
-  // Initialize the elements contents with undefined.
-  BuildFillElementsWithValue(
-      elements, elements_kind, graph()->GetConstant0(), length,
-      graph()->GetConstantUndefined());
-
-  return result;
-}
-
 HValue* HGraphBuilder::BuildNumberToString(HValue* object, AstType* type) {
   NoObservableSideEffectsScope scope(this);
 
@@ -12168,40 +12107,6 @@ void HOptimizedGraphBuilder::GenerateRegExpExec(CallRuntime* call) {
 }
 
 
-void HOptimizedGraphBuilder::GenerateRegExpFlags(CallRuntime* call) {
-  DCHECK_EQ(1, call->arguments()->length());
-  CHECK_ALIVE(VisitExpressions(call->arguments()));
-  HValue* regexp = Pop();
-  HInstruction* result =
-      New<HLoadNamedField>(regexp, nullptr, HObjectAccess::ForJSRegExpFlags());
-  return ast_context()->ReturnInstruction(result, call->id());
-}
-
-
-void HOptimizedGraphBuilder::GenerateRegExpSource(CallRuntime* call) {
-  DCHECK_EQ(1, call->arguments()->length());
-  CHECK_ALIVE(VisitExpressions(call->arguments()));
-  HValue* regexp = Pop();
-  HInstruction* result =
-      New<HLoadNamedField>(regexp, nullptr, HObjectAccess::ForJSRegExpSource());
-  return ast_context()->ReturnInstruction(result, call->id());
-}
-
-
-// Construct a RegExp exec result with two in-object properties.
-void HOptimizedGraphBuilder::GenerateRegExpConstructResult(CallRuntime* call) {
-  DCHECK_EQ(3, call->arguments()->length());
-  CHECK_ALIVE(VisitForValue(call->arguments()->at(0)));
-  CHECK_ALIVE(VisitForValue(call->arguments()->at(1)));
-  CHECK_ALIVE(VisitForValue(call->arguments()->at(2)));
-  HValue* input = Pop();
-  HValue* index = Pop();
-  HValue* length = Pop();
-  HValue* result = BuildRegExpConstructResult(length, index, input);
-  return ast_context()->ReturnValue(result);
-}
-
-
 // Fast support for number to string.
 void HOptimizedGraphBuilder::GenerateNumberToString(CallRuntime* call) {
   DCHECK_EQ(1, call->arguments()->length());