A64: Synchronize with r15545.

src/hydrogen-infer-types.cc

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-#include "marking-thread.h"
-
-#include "v8.h"
-
-#include "isolate.h"
-#include "v8threads.h"
+#include "hydrogen-infer-types.h"
 
 namespace v8 {
 namespace internal {
 
-MarkingThread::MarkingThread(Isolate* isolate)
-     : Thread("MarkingThread"),
-       isolate_(isolate),
-       heap_(isolate->heap()),
-       start_marking_semaphore_(OS::CreateSemaphore(0)),
-       end_marking_semaphore_(OS::CreateSemaphore(0)),
-       stop_semaphore_(OS::CreateSemaphore(0)) {
-  NoBarrier_Store(&stop_thread_, static_cast<AtomicWord>(false));
-  id_ = NoBarrier_AtomicIncrement(&id_counter_, 1);
-}
+void HInferTypesPhase::InferTypes(int from_inclusive, int to_inclusive) {
+  for (int i = from_inclusive; i <= to_inclusive; ++i) {
+    HBasicBlock* block = graph()->blocks()->at(i);
 
-
-Atomic32 MarkingThread::id_counter_ = -1;
-
-
-void MarkingThread::Run() {
-  Isolate::SetIsolateThreadLocals(isolate_, NULL);
-  DisallowHeapAllocation no_allocation;
-  DisallowHandleAllocation no_handles;
-  DisallowHandleDereference no_deref;
-
-  while (true) {
-    start_marking_semaphore_->Wait();
-
-    if (Acquire_Load(&stop_thread_)) {
-      stop_semaphore_->Signal();
-      return;
+    const ZoneList<HPhi*>* phis = block->phis();
+    for (int j = 0; j < phis->length(); j++) {
+      phis->at(j)->UpdateInferredType();
     }
 
-    end_marking_semaphore_->Signal();
+    for (HInstructionIterator it(block); !it.Done(); it.Advance()) {
+      it.Current()->UpdateInferredType();
+    }
+
+    if (block->IsLoopHeader()) {
+      HBasicBlock* last_back_edge =
+          block->loop_information()->GetLastBackEdge();
+      InferTypes(i + 1, last_back_edge->block_id());
+      // Skip all blocks already processed by the recursive call.
+      i = last_back_edge->block_id();
+      // Update phis of the loop header now after the whole loop body is
+      // guaranteed to be processed.
+      for (int j = 0; j < block->phis()->length(); ++j) {
+        HPhi* phi = block->phis()->at(j);
+        worklist_.Add(phi, zone());
+        in_worklist_.Add(phi->id());
+      }
+      while (!worklist_.is_empty()) {
+        HValue* current = worklist_.RemoveLast();
+        in_worklist_.Remove(current->id());
+        if (current->UpdateInferredType()) {
+          for (HUseIterator it(current->uses()); !it.Done(); it.Advance()) {
+            HValue* use = it.value();
+            if (!in_worklist_.Contains(use->id())) {
+              in_worklist_.Add(use->id());
+              worklist_.Add(use, zone());
+            }
+          }
+        }
+      }
+      ASSERT(in_worklist_.IsEmpty());
+    }
   }
 }
 
-
-void MarkingThread::Stop() {
-  Release_Store(&stop_thread_, static_cast<AtomicWord>(true));
-  start_marking_semaphore_->Signal();
-  stop_semaphore_->Wait();
-}
-
-
-void MarkingThread::StartMarking() {
-  start_marking_semaphore_->Signal();
-}
-
-
-void MarkingThread::WaitForMarkingThread() {
-  end_marking_semaphore_->Wait();
-}
-
 } }  // namespace v8::internal