Move IC code into a subdir and move ic-compilation related code from stub-cache into ic-compiler

src/ic-inl.h

-// 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.
-
-#ifndef V8_IC_INL_H_
-#define V8_IC_INL_H_
-
-#include "src/ic.h"
-
-#include "src/compiler.h"
-#include "src/debug.h"
-#include "src/macro-assembler.h"
-#include "src/prototype.h"
-
-namespace v8 {
-namespace internal {
-
-
-Address IC::address() const {
-  // Get the address of the call.
-  Address result = Assembler::target_address_from_return_address(pc());
-
-  Debug* debug = isolate()->debug();
-  // First check if any break points are active if not just return the address
-  // of the call.
-  if (!debug->has_break_points()) return result;
-
-  // At least one break point is active perform additional test to ensure that
-  // break point locations are updated correctly.
-  if (debug->IsDebugBreak(Assembler::target_address_at(result,
-                                                       raw_constant_pool()))) {
-    // If the call site is a call to debug break then return the address in
-    // the original code instead of the address in the running code. This will
-    // cause the original code to be updated and keeps the breakpoint active in
-    // the running code.
-    Code* code = GetCode();
-    Code* original_code = GetOriginalCode();
-    intptr_t delta =
-        original_code->instruction_start() - code->instruction_start();
-    // Return the address in the original code. This is the place where
-    // the call which has been overwritten by the DebugBreakXXX resides
-    // and the place where the inline cache system should look.
-    return result + delta;
-  } else {
-    // No break point here just return the address of the call.
-    return result;
-  }
-}
-
-
-ConstantPoolArray* IC::constant_pool() const {
-  if (!FLAG_enable_ool_constant_pool) {
-    return NULL;
-  } else {
-    Handle<ConstantPoolArray> result = raw_constant_pool_;
-    Debug* debug = isolate()->debug();
-    // First check if any break points are active if not just return the
-    // original constant pool.
-    if (!debug->has_break_points()) return *result;
-
-    // At least one break point is active perform additional test to ensure that
-    // break point locations are updated correctly.
-    Address target = Assembler::target_address_from_return_address(pc());
-    if (debug->IsDebugBreak(
-            Assembler::target_address_at(target, raw_constant_pool()))) {
-      // If the call site is a call to debug break then we want to return the
-      // constant pool for the original code instead of the breakpointed code.
-      return GetOriginalCode()->constant_pool();
-    }
-    return *result;
-  }
-}
-
-
-ConstantPoolArray* IC::raw_constant_pool() const {
-  if (FLAG_enable_ool_constant_pool) {
-    return *raw_constant_pool_;
-  } else {
-    return NULL;
-  }
-}
-
-
-Code* IC::GetTargetAtAddress(Address address,
-                             ConstantPoolArray* constant_pool) {
-  // Get the target address of the IC.
-  Address target = Assembler::target_address_at(address, constant_pool);
-  // Convert target address to the code object. Code::GetCodeFromTargetAddress
-  // is safe for use during GC where the map might be marked.
-  Code* result = Code::GetCodeFromTargetAddress(target);
-  DCHECK(result->is_inline_cache_stub());
-  return result;
-}
-
-
-void IC::SetTargetAtAddress(Address address,
-                            Code* target,
-                            ConstantPoolArray* constant_pool) {
-  DCHECK(target->is_inline_cache_stub() || target->is_compare_ic_stub());
-  Heap* heap = target->GetHeap();
-  Code* old_target = GetTargetAtAddress(address, constant_pool);
-#ifdef DEBUG
-  // STORE_IC and KEYED_STORE_IC use Code::extra_ic_state() to mark
-  // ICs as strict mode. The strict-ness of the IC must be preserved.
-  if (old_target->kind() == Code::STORE_IC ||
-      old_target->kind() == Code::KEYED_STORE_IC) {
-    DCHECK(StoreIC::GetStrictMode(old_target->extra_ic_state()) ==
-           StoreIC::GetStrictMode(target->extra_ic_state()));
-  }
-#endif
-  Assembler::set_target_address_at(
-      address, constant_pool, target->instruction_start());
-  if (heap->gc_state() == Heap::MARK_COMPACT) {
-    heap->mark_compact_collector()->RecordCodeTargetPatch(address, target);
-  } else {
-    heap->incremental_marking()->RecordCodeTargetPatch(address, target);
-  }
-  PostPatching(address, target, old_target);
-}
-
-
-template <class TypeClass>
-JSFunction* IC::GetRootConstructor(TypeClass* type, Context* native_context) {
-  if (type->Is(TypeClass::Boolean())) {
-    return native_context->boolean_function();
-  } else if (type->Is(TypeClass::Number())) {
-    return native_context->number_function();
-  } else if (type->Is(TypeClass::String())) {
-    return native_context->string_function();
-  } else if (type->Is(TypeClass::Symbol())) {
-    return native_context->symbol_function();
-  } else {
-    return NULL;
-  }
-}
-
-
-Handle<Map> IC::GetHandlerCacheHolder(HeapType* type, bool receiver_is_holder,
-                                      Isolate* isolate, CacheHolderFlag* flag) {
-  Handle<Map> receiver_map = TypeToMap(type, isolate);
-  if (receiver_is_holder) {
-    *flag = kCacheOnReceiver;
-    return receiver_map;
-  }
-  Context* native_context = *isolate->native_context();
-  JSFunction* builtin_ctor = GetRootConstructor(type, native_context);
-  if (builtin_ctor != NULL) {
-    *flag = kCacheOnPrototypeReceiverIsPrimitive;
-    return handle(HeapObject::cast(builtin_ctor->instance_prototype())->map());
-  }
-  *flag = receiver_map->is_dictionary_map()
-              ? kCacheOnPrototypeReceiverIsDictionary
-              : kCacheOnPrototype;
-  // Callers must ensure that the prototype is non-null.
-  return handle(JSObject::cast(receiver_map->prototype())->map());
-}
-
-
-Handle<Map> IC::GetICCacheHolder(HeapType* type, Isolate* isolate,
-                                 CacheHolderFlag* flag) {
-  Context* native_context = *isolate->native_context();
-  JSFunction* builtin_ctor = GetRootConstructor(type, native_context);
-  if (builtin_ctor != NULL) {
-    *flag = kCacheOnPrototype;
-    return handle(builtin_ctor->initial_map());
-  }
-  *flag = kCacheOnReceiver;
-  return TypeToMap(type, isolate);
-}
-
-
-IC::State CallIC::FeedbackToState(Handle<FixedArray> vector,
-                                  Handle<Smi> slot) const {
-  IC::State state = UNINITIALIZED;
-  Object* feedback = vector->get(slot->value());
-
-  if (feedback == *TypeFeedbackInfo::MegamorphicSentinel(isolate())) {
-    state = GENERIC;
-  } else if (feedback->IsAllocationSite() || feedback->IsJSFunction()) {
-    state = MONOMORPHIC;
-  } else {
-    CHECK(feedback == *TypeFeedbackInfo::UninitializedSentinel(isolate()));
-  }
-
-  return state;
-}
-} }  // namespace v8::internal
-
-#endif  // V8_IC_INL_H_