[turbofan] Respect pretenuring of heap numbers.

This extends pretenuring decisions based on allocation sites to heap
numbers that are allocated as part of object literals. It ensures memory
locality of a bigger enclosure of the deep copy of an object literal.

R=bmeurer@chromium.org
TEST=cctest/test-heap/OptimizedPretenuringMixedInObjectProperties

Review-Url: https://codereview.chromium.org/2135933002
Cr-Commit-Position: refs/heads/master@{#37645}

src/compiler/js-create-lowering.cc

@@ -1087,7 +1087,7 @@ Node* JSCreateLowering::AllocateFastLiteral(
         effect = graph()->NewNode(
             common()->BeginRegion(RegionObservability::kNotObservable), effect);
         value = effect = graph()->NewNode(
-            simplified()->Allocate(NOT_TENURED),
+            simplified()->Allocate(pretenure),
             jsgraph()->Constant(HeapNumber::kSize), effect, control);
         effect = graph()->NewNode(
             simplified()->StoreField(AccessBuilder::ForMap()), value,

test/cctest/cctest.status

@@ -102,9 +102,6 @@
   # coverage).
   'test-heap/ObjectsInOptimizedCodeAreWeak': [PASS, NO_VARIANTS],
 
-  # TODO(mstarzinger): The pretenuring decision is different in TurboFan.
-  'test-heap/OptimizedPretenuringMixedInObjectProperties': [PASS, NO_VARIANTS],
-
   # TurboFan cpu profiler result is different.
   'test-cpu-profiler/CollectDeoptEvents': [PASS, NO_VARIANTS],
   'test-cpu-profiler/DeoptAtFirstLevelInlinedSource': [PASS, NO_VARIANTS],
@@ -170,6 +167,7 @@
   'test-heap/OptimizedPretenuringAllocationFolding': [PASS, NO_IGNITION],
   'test-heap/OptimizedPretenuringdoubleArrayLiterals': [PASS, NO_IGNITION],
   'test-heap/OptimizedPretenuringDoubleArrayProperties': [PASS, NO_IGNITION],
+  'test-heap/OptimizedPretenuringMixedInObjectProperties': [PASS, NO_IGNITION],
   'test-heap/OptimizedPretenuringNestedDoubleLiterals': [PASS, NO_IGNITION],
   'test-heap/OptimizedPretenuringNestedMixedArrayLiterals': [PASS, NO_IGNITION],
   'test-heap/OptimizedPretenuringNestedObjectLiterals': [PASS, NO_IGNITION],
@@ -561,6 +559,7 @@
   'test-heap/OptimizedPretenuringAllocationFolding': [FAIL],
   'test-heap/OptimizedPretenuringdoubleArrayLiterals': [FAIL],
   'test-heap/OptimizedPretenuringDoubleArrayProperties': [FAIL],
+  'test-heap/OptimizedPretenuringMixedInObjectProperties': [FAIL],
   'test-heap/OptimizedPretenuringNestedDoubleLiterals': [FAIL],
   'test-heap/OptimizedPretenuringNestedMixedArrayLiterals': [FAIL],
   'test-heap/OptimizedPretenuringNestedObjectLiterals': [FAIL],