Make LoadIndexedInstr for Uint32List use kUnboxedUint32 representation

runtime/vm/intermediate_language_arm64.cc

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/globals.h"  // Needed here to get TARGET_ARCH_ARM64.
 #if defined(TARGET_ARCH_ARM64)
 
 #include "vm/intermediate_language.h"
 
 #include "vm/dart_entry.h"
@@ skipping 975 matching lines @@
     case kImmutableArrayCid:
     case kTypedDataInt8ArrayCid:
     case kTypedDataUint8ArrayCid:
     case kTypedDataUint8ClampedArrayCid:
     case kExternalTypedDataUint8ArrayCid:
     case kExternalTypedDataUint8ClampedArrayCid:
     case kTypedDataInt16ArrayCid:
     case kTypedDataUint16ArrayCid:
     case kOneByteStringCid:
     case kTwoByteStringCid:
+      return kTagged;
     case kTypedDataInt32ArrayCid:
+      return kUnboxedInt32;
     case kTypedDataUint32ArrayCid:
-      return kTagged;
+      return kUnboxedUint32;
     case kTypedDataFloat32ArrayCid:
     case kTypedDataFloat64ArrayCid:
       return kUnboxedDouble;
     case kTypedDataInt32x4ArrayCid:
       return kUnboxedInt32x4;
     case kTypedDataFloat32x4ArrayCid:
       return kUnboxedFloat32x4;
     case kTypedDataFloat64x2ArrayCid:
       return kUnboxedFloat64x2;
     default:
@@ skipping 77 matching lines @@
       case kTypedDataInt32x4ArrayCid:
       case kTypedDataFloat32x4ArrayCid:
         __ fldrq(result, element_address);
         break;
       default:
         UNREACHABLE();
     }
     return;
   }
 
+  if ((representation() == kUnboxedInt32) ||
+      (representation() == kUnboxedUint32)) {
+    const Register result = locs()->out(0).reg();
+    switch (class_id()) {
+      case kTypedDataInt32ArrayCid:
+        ASSERT(representation() == kUnboxedInt32);
+        __ ldr(result, element_address, kWord);
+        break;
+      case kTypedDataUint32ArrayCid:
+        ASSERT(representation() == kUnboxedUint32);
+        __ ldr(result, element_address, kUnsignedWord);
+        break;
+      default:
+        UNREACHABLE();
+      }
+    return;
+  }
+
+  ASSERT(representation() == kTagged);
   const Register result = locs()->out(0).reg();
   switch (class_id()) {
     case kTypedDataInt8ArrayCid:
       ASSERT(index_scale() == 1);
       __ ldr(result, element_address, kByte);
       __ SmiTag(result);
       break;
     case kTypedDataUint8ArrayCid:
     case kTypedDataUint8ClampedArrayCid:
     case kExternalTypedDataUint8ArrayCid:
     case kExternalTypedDataUint8ClampedArrayCid:
     case kOneByteStringCid:
       ASSERT(index_scale() == 1);
       __ ldr(result, element_address, kUnsignedByte);
       __ SmiTag(result);
       break;
     case kTypedDataInt16ArrayCid:
       __ ldr(result, element_address, kHalfword);
       __ SmiTag(result);
       break;
     case kTypedDataUint16ArrayCid:
     case kTwoByteStringCid:
       __ ldr(result, element_address, kUnsignedHalfword);
       __ SmiTag(result);
       break;
-    case kTypedDataInt32ArrayCid:
-      __ ldr(result, element_address, kWord);
-      __ SmiTag(result);
-      break;
-    case kTypedDataUint32ArrayCid:
-      __ ldr(result, element_address, kUnsignedWord);
-      __ SmiTag(result);
-      break;
     default:
       ASSERT((class_id() == kArrayCid) || (class_id() == kImmutableArrayCid));
       __ ldr(result, element_address);
       break;
   }
 }
 
 
 Representation StoreIndexedInstr::RequiredInputRepresentation(
     intptr_t idx) const {
@@ skipping 4356 matching lines @@
   compiler->GenerateCall(token_pos(), &label, stub_kind_, locs());
 #if defined(DEBUG)
   __ LoadImmediate(R4, kInvalidObjectPointer, kNoPP);
   __ LoadImmediate(R5, kInvalidObjectPointer, kNoPP);
 #endif
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_ARM64