Hydrogenize (and share) StoreField except heapobject (for now).

src/arm64/stub-cache-arm64.cc

Index: src/arm64/stub-cache-arm64.cc
diff --git a/src/arm64/stub-cache-arm64.cc b/src/arm64/stub-cache-arm64.cc
index 7ac68e79a5b1c3eebc1b27e8006f586563bc7b50..92fbecf7524e90d881f6d3dcba9c4ae72c9127ed 100644
--- a/src/arm64/stub-cache-arm64.cc
+++ b/src/arm64/stub-cache-arm64.cc
@@ -548,84 +548,38 @@ void NamedStoreHandlerCompiler::GenerateStoreField(
 
   FieldIndex index = lookup->GetFieldIndex();
 
-  Representation representation = lookup->representation();
-  DCHECK(!representation.IsNone());
-  if (representation.IsSmi()) {
-    __ JumpIfNotSmi(value_reg, miss_label);
-  } else if (representation.IsHeapObject()) {
-    __ JumpIfSmi(value_reg, miss_label);
-    HeapType* field_type = lookup->GetFieldType();
-    HeapType::Iterator<Map> it = field_type->Classes();
-    if (!it.Done()) {
-      __ Ldr(scratch1, FieldMemOperand(value_reg, HeapObject::kMapOffset));
-      Label do_store;
-      while (true) {
-        __ CompareMap(scratch1, it.Current());
-        it.Advance();
-        if (it.Done()) {
-          __ B(ne, miss_label);
-          break;
-        }
-        __ B(eq, &do_store);
+  DCHECK(lookup->representation().IsHeapObject());
+  __ JumpIfSmi(value_reg, miss_label);
+  HeapType* field_type = lookup->GetFieldType();
+  HeapType::Iterator<Map> it = field_type->Classes();
+  if (!it.Done()) {
+    __ Ldr(scratch1, FieldMemOperand(value_reg, HeapObject::kMapOffset));
+    Label do_store;
+    while (true) {
+      __ CompareMap(scratch1, it.Current());
+      it.Advance();
+      if (it.Done()) {
+        __ B(ne, miss_label);
+        break;
       }
-      __ Bind(&do_store);
-    }
-  } else if (representation.IsDouble()) {
-    UseScratchRegisterScope temps(masm());
-    DoubleRegister temp_double = temps.AcquireD();
-
-    __ SmiUntagToDouble(temp_double, value_reg, kSpeculativeUntag);
-
-    // Load the double storage.
-    if (index.is_inobject()) {
-      __ Ldr(scratch1, FieldMemOperand(receiver_reg, index.offset()));
-    } else {
-      __ Ldr(scratch1,
-             FieldMemOperand(receiver_reg, JSObject::kPropertiesOffset));
-      __ Ldr(scratch1, FieldMemOperand(scratch1, index.offset()));
+      __ B(eq, &do_store);
     }
-
-    // Store the value into the storage.
-    Label do_store, heap_number;
-
-    __ JumpIfSmi(value_reg, &do_store);
-
-    __ CheckMap(value_reg, scratch2, Heap::kHeapNumberMapRootIndex,
-                miss_label, DONT_DO_SMI_CHECK);
-    __ Ldr(temp_double, FieldMemOperand(value_reg, HeapNumber::kValueOffset));
-
     __ Bind(&do_store);
-    __ Str(temp_double, FieldMemOperand(scratch1, HeapNumber::kValueOffset));
-
-    // Return the value (register x0).
-    DCHECK(value_reg.is(x0));
-    __ Ret();
-    return;
   }
 
-  // TODO(verwaest): Share this code as a code stub.
-  SmiCheck smi_check = representation.IsTagged()
-      ? INLINE_SMI_CHECK : OMIT_SMI_CHECK;
   if (index.is_inobject()) {
     // Set the property straight into the object.
     __ Str(value_reg, FieldMemOperand(receiver_reg, index.offset()));
 
-    if (!representation.IsSmi()) {
-      // Skip updating write barrier if storing a smi.
-      __ JumpIfSmi(value_reg, &exit);
+    // Skip updating write barrier if storing a smi.
+    __ JumpIfSmi(value_reg, &exit);
 
-      // Update the write barrier for the array address.
-      // Pass the now unused name_reg as a scratch register.
-      __ Mov(name_reg, value_reg);
-      __ RecordWriteField(receiver_reg,
-                          index.offset(),
-                          name_reg,
-                          scratch1,
-                          kLRHasNotBeenSaved,
-                          kDontSaveFPRegs,
-                          EMIT_REMEMBERED_SET,
-                          smi_check);
-    }
+    // Update the write barrier for the array address.
+    // Pass the now unused name_reg as a scratch register.
+    __ Mov(name_reg, value_reg);
+    __ RecordWriteField(receiver_reg, index.offset(), name_reg, scratch1,
+                        kLRHasNotBeenSaved, kDontSaveFPRegs,
+                        EMIT_REMEMBERED_SET, OMIT_SMI_CHECK);
   } else {
     // Write to the properties array.
     // Get the properties array
@@ -633,22 +587,15 @@ void NamedStoreHandlerCompiler::GenerateStoreField(
            FieldMemOperand(receiver_reg, JSObject::kPropertiesOffset));
     __ Str(value_reg, FieldMemOperand(scratch1, index.offset()));
 
-    if (!representation.IsSmi()) {
-      // Skip updating write barrier if storing a smi.
-      __ JumpIfSmi(value_reg, &exit);
+    // Skip updating write barrier if storing a smi.
+    __ JumpIfSmi(value_reg, &exit);
 
-      // Update the write barrier for the array address.
-      // Ok to clobber receiver_reg and name_reg, since we return.
-      __ Mov(name_reg, value_reg);
-      __ RecordWriteField(scratch1,
-                          index.offset(),
-                          name_reg,
-                          receiver_reg,
-                          kLRHasNotBeenSaved,
-                          kDontSaveFPRegs,
-                          EMIT_REMEMBERED_SET,
-                          smi_check);
-    }
+    // Update the write barrier for the array address.
+    // Ok to clobber receiver_reg and name_reg, since we return.
+    __ Mov(name_reg, value_reg);
+    __ RecordWriteField(scratch1, index.offset(), name_reg, receiver_reg,
+                        kLRHasNotBeenSaved, kDontSaveFPRegs,
+                        EMIT_REMEMBERED_SET, OMIT_SMI_CHECK);
   }
 
   __ Bind(&exit);