vector-based ICs did not update type feedback counts correctly.

src/arm64/code-stubs-arm64.cc

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/v8.h"
 
 #if V8_TARGET_ARCH_ARM64
 
 #include "src/bootstrapper.h"
 #include "src/code-stubs.h"
@@ skipping 3060 matching lines @@
 
   if (!FLAG_trace_ic) {
     // We are going megamorphic. If the feedback is a JSFunction, it is fine
     // to handle it here. More complex cases are dealt with in the runtime.
     __ AssertNotSmi(x4);
     __ JumpIfNotObjectType(x4, x5, x5, JS_FUNCTION_TYPE, &miss);
     __ Add(x4, feedback_vector,
            Operand::UntagSmiAndScale(index, kPointerSizeLog2));
     __ LoadRoot(x5, Heap::kmegamorphic_symbolRootIndex);
     __ Str(x5, FieldMemOperand(x4, FixedArray::kHeaderSize));
+    // We have to update statistics for runtime profiling.
+    const int with_types_offset =
+        FixedArray::OffsetOfElementAt(TypeFeedbackVector::kWithTypesIndex);
+    __ Ldr(x4, FieldMemOperand(feedback_vector, with_types_offset));
+    __ Subs(x4, x4, Operand(Smi::FromInt(1)));
+    __ Str(x4, FieldMemOperand(feedback_vector, with_types_offset));
+    const int generic_offset =
+        FixedArray::OffsetOfElementAt(TypeFeedbackVector::kGenericCountIndex);
+    __ Ldr(x4, FieldMemOperand(feedback_vector, generic_offset));
+    __ Adds(x4, x4, Operand(Smi::FromInt(1)));
+    __ Str(x4, FieldMemOperand(feedback_vector, generic_offset));
     __ B(&slow_start);
   }
 
   // We are here because tracing is on or we are going monomorphic.
   __ bind(&miss);
   GenerateMiss(masm);
 
   // the slow case
   __ bind(&slow_start);
 
@@ skipping 1999 matching lines @@
                               MemOperand(fp, 6 * kPointerSize),
                               NULL);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_ARM64