[heap] Remove dead RecordCodeTargetPatch support.

R=mlippautz@chromium.org
BUG=v8:6409

Change-Id: I0cdba60385c8b481a3fd7b1b5c3b2ba1b0b8367b
Reviewed-on: https://chromium-review.googlesource.com/628059Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47542}

src/heap/incremental-marking.cc

@@ -86,26 +86,6 @@ int IncrementalMarking::RecordWriteFromCode(HeapObject* obj, Object** slot,
   return 0;
 }
 
-void IncrementalMarking::RecordCodeTargetPatch(Code* host, Address pc,
-                                               HeapObject* value) {
-  if (IsMarking()) {
-    RelocInfo rinfo(pc, RelocInfo::CODE_TARGET, 0, host);
-    RecordWriteIntoCode(host, &rinfo, value);
-  }
-}
-
-
-void IncrementalMarking::RecordCodeTargetPatch(Address pc, HeapObject* value) {
-  if (IsMarking()) {
-    Code* host = heap_->isolate()
-                     ->inner_pointer_to_code_cache()
-                     ->GcSafeFindCodeForInnerPointer(pc);
-    RelocInfo rinfo(pc, RelocInfo::CODE_TARGET, 0, host);
-    RecordWriteIntoCode(host, &rinfo, value);
-  }
-}
-
-
 void IncrementalMarking::RecordWriteIntoCodeSlow(Code* host, RelocInfo* rinfo,
                                                  Object* value) {
   if (BaseRecordWrite(host, value)) {

src/heap/incremental-marking.h

@@ -233,8 +233,6 @@ class V8_EXPORT_PRIVATE IncrementalMarking {
 
   void RecordWriteSlow(HeapObject* obj, Object** slot, Object* value);
   void RecordWriteIntoCodeSlow(Code* host, RelocInfo* rinfo, Object* value);
-  void RecordCodeTargetPatch(Code* host, Address pc, HeapObject* value);
-  void RecordCodeTargetPatch(Address pc, HeapObject* value);
 
   // Returns true if the function succeeds in transitioning the object
   // from white to grey.

src/heap/mark-compact.cc

@@ -4619,22 +4619,5 @@ void MarkCompactCollector::StartSweepSpaces() {
   heap_->lo_space()->FreeUnmarkedObjects();
 }
 
-
-void MarkCompactCollector::RecordCodeTargetPatch(Address pc, Code* target) {
-  DCHECK(heap()->gc_state() == Heap::MARK_COMPACT);
-  if (is_compacting()) {
-    Code* host =
-        isolate()->inner_pointer_to_code_cache()->GcSafeFindCodeForInnerPointer(
-            pc);
-    if (non_atomic_marking_state()->IsBlack(host)) {
-      RelocInfo rinfo(pc, RelocInfo::CODE_TARGET, 0, host);
-      // The target is always in old space, we don't have to record the slot in
-      // the old-to-new remembered set.
-      DCHECK(!heap()->InNewSpace(target));
-      RecordRelocSlot(host, &rinfo, target);
-    }
-  }
-}
-
 }  // namespace internal
 }  // namespace v8

src/heap/mark-compact.h

@@ -698,7 +698,6 @@ class MarkCompactCollector final : public MarkCompactCollectorBase {
   }
 
   void RecordRelocSlot(Code* host, RelocInfo* rinfo, Object* target);
-  void RecordCodeTargetPatch(Address pc, Code* target);
   V8_INLINE static void RecordSlot(HeapObject* object, Object** slot,
                                    Object* target);
   void RecordLiveSlotsOnPage(Page* page);