MIPS64: vector-based ICs did not update type feedback counts correctly.

src/mips64/code-stubs-mips64.cc

 // Copyright 2012 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_MIPS64
 
 #include "src/bootstrapper.h"
 #include "src/code-stubs.h"
@@ skipping 2929 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(a4);
     __ GetObjectType(a4, a5, a5);
     __ Branch(&miss, ne, a5, Operand(JS_FUNCTION_TYPE));
     __ dsrl(a4, a3, 32 - kPointerSizeLog2);
     __ Daddu(a4, a2, Operand(a4));
     __ LoadRoot(at, Heap::kmegamorphic_symbolRootIndex);
     __ sd(at, FieldMemOperand(a4, FixedArray::kHeaderSize));
-    __ Branch(&slow_start);
+    // We have to update statistics for runtime profiling.
+    const int with_types_offset =
+    FixedArray::OffsetOfElementAt(TypeFeedbackVector::kWithTypesIndex);
+    __ ld(a4, FieldMemOperand(a2, with_types_offset));
+    __ Dsubu(a4, a4, Operand(Smi::FromInt(1)));
+    __ sd(a4, FieldMemOperand(a2, with_types_offset));
+    const int generic_offset =
+    FixedArray::OffsetOfElementAt(TypeFeedbackVector::kGenericCountIndex);
+    __ ld(a4, FieldMemOperand(a2, generic_offset));
+    __ Daddu(a4, a4, Operand(Smi::FromInt(1)));
+    __ Branch(USE_DELAY_SLOT, &slow_start);
+    __ sd(a4, FieldMemOperand(a2, generic_offset));  // In delay slot.
   }
 
   // We are here because tracing is on or we are going monomorphic.
   __ bind(&miss);
   GenerateMiss(masm);
 
   // the slow case
   __ bind(&slow_start);
   // Check that the function is really a JavaScript function.
   // r1: pushed function (to be verified)
@@ skipping 1990 matching lines @@
                               MemOperand(fp, 6 * kPointerSize),
                               NULL);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_MIPS64