Include multiplication in the megamorphic cache hash to avoid cid ranges overlapping modulo table s…

runtime/vm/stub_code_mips.cc

 // Copyright (c) 2013, 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"
 #if defined(TARGET_ARCH_MIPS)
 
 #include "vm/assembler.h"
 #include "vm/code_generator.h"
 #include "vm/compiler.h"
@@ skipping 2202 matching lines @@
 
 
 void StubCode::EmitMegamorphicLookup(Assembler* assembler) {
   __ LoadTaggedClassIdMayBeSmi(T0, T0);
   // T0: class ID of the receiver (smi).
   __ lw(S4, FieldAddress(S5, MegamorphicCache::arguments_descriptor_offset()));
   __ lw(T2, FieldAddress(S5, MegamorphicCache::buckets_offset()));
   __ lw(T1, FieldAddress(S5, MegamorphicCache::mask_offset()));
   // T2: cache buckets array.
   // T1: mask.
-  __ mov(T3, T0);
+  __ LoadImmediate(TMP, MegamorphicCache::kSpreadFactor);
+  __ mult(TMP, T0);
+  __ mflo(T3);
   // T3: probe.
 
   Label loop, update, call_target_function;
   __ b(&loop);
 
   __ Bind(&update);
   __ addiu(T3, T3, Immediate(Smi::RawValue(1)));
   __ Bind(&loop);
   __ and_(T3, T3, T1);
   const intptr_t base = Array::data_offset();
@@ skipping 108 matching lines @@
 }
 
 
 void StubCode::GenerateFrameAwaitingMaterializationStub(Assembler* assembler) {
   __ break_(0);
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_MIPS