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

src/mips/code-stubs-mips.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_MIPS
 
 #include "src/base/bits.h"
 #include "src/bootstrapper.h"
@@ skipping 2832 matching lines @@
   }
 
   __ bind(&extra_checks_or_miss);
   Label miss;
 
   __ LoadRoot(at, Heap::kmegamorphic_symbolRootIndex);
   __ Branch(&slow_start, eq, t0, Operand(at));
   __ LoadRoot(at, Heap::kuninitialized_symbolRootIndex);
   __ Branch(&miss, eq, t0, Operand(at));
 
-  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(t0);
-    __ GetObjectType(t0, t1, t1);
-    __ Branch(&miss, ne, t1, Operand(JS_FUNCTION_TYPE));
-    __ sll(t0, a3, kPointerSizeLog2 - kSmiTagSize);
-    __ Addu(t0, a2, Operand(t0));
-    __ LoadRoot(at, Heap::kmegamorphic_symbolRootIndex);
-    __ sw(at, FieldMemOperand(t0, FixedArray::kHeaderSize));
-    __ Branch(&slow_start);
-  }
-
   // 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)
   __ JumpIfSmi(a1, &non_function);
 
@@ skipping 2022 matching lines @@
                               MemOperand(fp, 6 * kPointerSize),
                               NULL);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_MIPS