diff --git a/runtime/lib/bigint.dart b/runtime/lib/bigint.dart
index f6ea8e9..c829495 100644
--- a/runtime/lib/bigint.dart
+++ b/runtime/lib/bigint.dart
@@ -66,9 +66,9 @@
 
   // Internal data structure.
   bool get _neg native "Bigint_getNeg";
-  void set _neg(bool neg) native "Bigint_setNeg";
+  void set _neg(bool value) native "Bigint_setNeg";
   int get _used native "Bigint_getUsed";
-  void set _used(int used) native "Bigint_setUsed";
+  void set _used(int value) native "Bigint_setUsed";
   Uint32List get _digits native "Bigint_getDigits";
   void set _digits(Uint32List digits) {
     // The VM expects digits_ to be a Uint32List.
@@ -76,7 +76,7 @@
     _set_digits(digits);
   }
 
-  void _set_digits(Uint32List digits) native "Bigint_setDigits";
+  void _set_digits(Uint32List value) native "Bigint_setDigits";
 
   // Factory returning an instance initialized to value 0.
   factory _Bigint() native "Bigint_allocate";
@@ -1118,6 +1118,41 @@
   bool get isEven => _used == 0 || (_digits[0] & 1) == 0;
   bool get isNegative => _neg;
 
+  String _toPow2String(int radix) {
+    if (_used == 0) return "0";
+    assert(radix & (radix - 1) == 0);
+    final bitsPerChar = radix.bitLength - 1;
+    final firstcx = _neg ? 1 : 0;  // Index of first char in str after the sign.
+    final lastdx = _used - 1;  // Index of last digit in bigint.
+    final bitLength = lastdx*DIGIT_BITS + _nbits(_digits[lastdx]);
+    // Index of char in str. Initialize with str length.
+    var cx = firstcx + (bitLength + bitsPerChar - 1) ~/ bitsPerChar;
+    _OneByteString str = _OneByteString._allocate(cx);
+    str._setAt(0, 0x2d);  // '-'. Is overwritten if not negative.
+    final mask = radix - 1;
+    var dx = 0;  // Digit index in bigint.
+    var bx = 0;  // Bit index in bigint digit.
+    do {
+      var ch;
+      if (bx > (DIGIT_BITS - bitsPerChar)) {
+        ch = _digits[dx++] >> bx;
+        bx += bitsPerChar - DIGIT_BITS;
+        if (dx <= lastdx) {
+          ch |= (_digits[dx] & ((1 << bx) - 1)) << (bitsPerChar - bx);
+        }
+      } else {
+        ch = (_digits[dx] >> bx) & mask;
+        bx += bitsPerChar;
+        if (bx >= DIGIT_BITS) {
+          bx -= DIGIT_BITS;
+          dx++;
+        }
+      }
+      str._setAt(--cx, _IntegerImplementation._digits.codeUnitAt(ch));
+    } while (cx > firstcx);
+    return str;
+  }
+
   _leftShiftWithMask32(int count, int mask) {
     if (_used == 0) return 0;
     if (count is! _Smi) {
diff --git a/runtime/lib/integers.dart b/runtime/lib/integers.dart
index b888106..accda5b 100644
--- a/runtime/lib/integers.dart
+++ b/runtime/lib/integers.dart
@@ -220,7 +220,7 @@
       throw new ArgumentError(radix);
     }
     if (radix & (radix - 1) == 0) {
-      return _toPow2String(this, radix);
+      return _toPow2String(radix);
     }
     if (radix == 10) return this.toString();
     final bool isNegative = this < 0;
@@ -240,7 +240,8 @@
     return string;
   }
 
-  static String _toPow2String(value, radix) {
+  String _toPow2String(int radix) {
+    int value = this;
     if (value == 0) return "0";
     assert(radix & (radix - 1) == 0);
     var negative = value < 0;
diff --git a/runtime/vm/flow_graph_builder.cc b/runtime/vm/flow_graph_builder.cc
index 8ed3f1d..6d99ae4 100644
--- a/runtime/vm/flow_graph_builder.cc
+++ b/runtime/vm/flow_graph_builder.cc
@@ -3296,6 +3296,23 @@
         load->set_recognized_kind(kind);
         return ReturnDefinition(load);
       }
+      case MethodRecognizer::kBigint_setDigits: {
+        Value* receiver = Bind(BuildLoadThisVar(node->scope()));
+        LocalVariable* value_var =
+            node->scope()->LookupVariable(Symbols::Value(), true);
+        ASSERT(value_var != NULL);
+        Value* value = Bind(new(I) LoadLocalInstr(*value_var));
+        StoreInstanceFieldInstr* store = new(I) StoreInstanceFieldInstr(
+            Bigint::digits_offset(),
+            receiver,
+            value,
+            kEmitStoreBarrier,
+            node->token_pos());
+        Do(store);
+        ConstantInstr* null_const = new(I) ConstantInstr(
+            Object::ZoneHandle(I, Object::null()));
+        return ReturnDefinition(null_const);
+      }
       case MethodRecognizer::kBigint_getUsed: {
         Value* receiver = Bind(BuildLoadThisVar(node->scope()));
         LoadFieldInstr* load = new(I) LoadFieldInstr(
@@ -3307,6 +3324,23 @@
         load->set_recognized_kind(kind);
         return ReturnDefinition(load);
       }
+      case MethodRecognizer::kBigint_setUsed: {
+        Value* receiver = Bind(BuildLoadThisVar(node->scope()));
+        LocalVariable* value_var =
+            node->scope()->LookupVariable(Symbols::Value(), true);
+        ASSERT(value_var != NULL);
+        Value* value = Bind(new(I) LoadLocalInstr(*value_var));
+        StoreInstanceFieldInstr* store = new(I) StoreInstanceFieldInstr(
+            Bigint::used_offset(),
+            receiver,
+            value,
+            kNoStoreBarrier,
+            node->token_pos());
+        Do(store);
+        ConstantInstr* null_const = new(I) ConstantInstr(
+            Object::ZoneHandle(I, Object::null()));
+        return ReturnDefinition(null_const);
+      }
       case MethodRecognizer::kBigint_getNeg: {
         Value* receiver = Bind(BuildLoadThisVar(node->scope()));
         LoadFieldInstr* load = new(I) LoadFieldInstr(
@@ -3318,6 +3352,23 @@
         load->set_recognized_kind(kind);
         return ReturnDefinition(load);
       }
+      case MethodRecognizer::kBigint_setNeg: {
+        Value* receiver = Bind(BuildLoadThisVar(node->scope()));
+        LocalVariable* value_var =
+            node->scope()->LookupVariable(Symbols::Value(), true);
+        ASSERT(value_var != NULL);
+        Value* value = Bind(new(I) LoadLocalInstr(*value_var));
+        StoreInstanceFieldInstr* store = new(I) StoreInstanceFieldInstr(
+            Bigint::neg_offset(),
+            receiver,
+            value,
+            kEmitStoreBarrier,
+            node->token_pos());
+        Do(store);
+        ConstantInstr* null_const = new(I) ConstantInstr(
+            Object::ZoneHandle(I, Object::null()));
+        return ReturnDefinition(null_const);
+      }
       default:
         break;
     }
diff --git a/runtime/vm/flow_graph_optimizer.cc b/runtime/vm/flow_graph_optimizer.cc
index 13995c9..b2e3a9e 100644
--- a/runtime/vm/flow_graph_optimizer.cc
+++ b/runtime/vm/flow_graph_optimizer.cc
@@ -589,7 +589,14 @@
     BlockEntryInstr* entry = block_order_[i];
     for (ForwardInstructionIterator it(entry); !it.Done(); it.Advance()) {
       Instruction* current = it.Current();
+      if (current->HasUnmatchedInputRepresentations()) {
+        // Can't canonicalize this instruction until all conversions for its
+        // inputs are inserted.
+        continue;
+      }
+
       Instruction* replacement = current->Canonicalize(flow_graph());
+
       if (replacement != current) {
         // For non-definitions Canonicalize should return either NULL or
         // this.
@@ -2963,57 +2970,6 @@
     return true;
   }
 
-  if ((recognized_kind == MethodRecognizer::kBigint_setUsed) &&
-      (ic_data.NumberOfChecks() == 1) &&
-      (class_ids[0] == kBigintCid)) {
-    // This is an internal method, no need to check argument types nor
-    // range.
-    Definition* bigint = call->ArgumentAt(0);
-    Definition* value = call->ArgumentAt(1);
-    StoreInstanceFieldInstr* store = new(I) StoreInstanceFieldInstr(
-        Bigint::used_offset(),
-        new(I) Value(bigint),
-        new(I) Value(value),
-        kNoStoreBarrier,
-        call->token_pos());
-    ReplaceCall(call, store);
-    return true;
-  }
-
-  if ((recognized_kind == MethodRecognizer::kBigint_setDigits) &&
-      (ic_data.NumberOfChecks() == 1) &&
-      (class_ids[0] == kBigintCid)) {
-    // This is an internal method, no need to check argument types nor
-    // range.
-    Definition* bigint = call->ArgumentAt(0);
-    Definition* value = call->ArgumentAt(1);
-    StoreInstanceFieldInstr* store = new(I) StoreInstanceFieldInstr(
-        Bigint::digits_offset(),
-        new(I) Value(bigint),
-        new(I) Value(value),
-        kEmitStoreBarrier,
-        call->token_pos());
-    ReplaceCall(call, store);
-    return true;
-  }
-
-  if ((recognized_kind == MethodRecognizer::kBigint_setNeg) &&
-      (ic_data.NumberOfChecks() == 1) &&
-      (class_ids[0] == kBigintCid)) {
-    // This is an internal method, no need to check argument types nor
-    // range.
-    Definition* bigint = call->ArgumentAt(0);
-    Definition* value = call->ArgumentAt(1);
-    StoreInstanceFieldInstr* store = new(I) StoreInstanceFieldInstr(
-        Bigint::neg_offset(),
-        new(I) Value(bigint),
-        new(I) Value(value),
-        kEmitStoreBarrier,
-        call->token_pos());
-    ReplaceCall(call, store);
-    return true;
-  }
-
   if (((recognized_kind == MethodRecognizer::kStringBaseCodeUnitAt) ||
        (recognized_kind == MethodRecognizer::kStringBaseCharAt)) &&
       (ic_data.NumberOfChecks() == 1) &&
diff --git a/runtime/vm/flow_graph_range_analysis.cc b/runtime/vm/flow_graph_range_analysis.cc
index 0f87533..d4f192a 100644
--- a/runtime/vm/flow_graph_range_analysis.cc
+++ b/runtime/vm/flow_graph_range_analysis.cc
@@ -2402,7 +2402,7 @@
 }
 
 
-bool Range::And(const Range* left_range,
+void Range::And(const Range* left_range,
                 const Range* right_range,
                 RangeBoundary* result_min,
                 RangeBoundary* result_max) {
@@ -2414,16 +2414,17 @@
   if (Range::ConstantMin(right_range).ConstantValue() >= 0) {
     *result_min = RangeBoundary::FromConstant(0);
     *result_max = Range::ConstantMax(right_range);
-    return true;
+    return;
   }
 
   if (Range::ConstantMin(left_range).ConstantValue() >= 0) {
     *result_min = RangeBoundary::FromConstant(0);
     *result_max = Range::ConstantMax(left_range);
-    return true;
+    return;
   }
 
-  return false;
+  *result_min = RangeBoundary::MinConstant(RangeBoundary::kRangeBoundaryInt64);
+  *result_max = RangeBoundary::MaxConstant(RangeBoundary::kRangeBoundaryInt64);
 }
 
 
@@ -2524,7 +2525,7 @@
 }
 
 
-bool Range::Mul(const Range* left_range,
+void Range::Mul(const Range* left_range,
                 const Range* right_range,
                 RangeBoundary* result_min,
                 RangeBoundary* result_max) {
@@ -2545,7 +2546,7 @@
     const int64_t r_max =
         OnlyNegativeOrZero(*left_range, *right_range) ? 0 : mul_max;
     *result_max = RangeBoundary::FromConstant(r_max);
-    return true;
+    return;
   }
 
   // TODO(vegorov): handle mixed sign case that leads to (-Infinity, 0] range.
@@ -2553,10 +2554,11 @@
       OnlyNegativeOrZero(*left_range, *right_range)) {
     *result_min = RangeBoundary::FromConstant(0);
     *result_max = RangeBoundary::PositiveInfinity();
-    return true;
+    return;
   }
 
-  return false;
+  *result_min = RangeBoundary::NegativeInfinity();
+  *result_max = RangeBoundary::PositiveInfinity();
 }
 
 
@@ -2603,39 +2605,39 @@
     case Token::kADD:
       Range::Add(left_range, right_range, &min, &max, left_defn);
       break;
+
     case Token::kSUB:
       Range::Sub(left_range, right_range, &min, &max, left_defn);
       break;
-    case Token::kMUL: {
-      if (!Range::Mul(left_range, right_range, &min, &max)) {
-        *result = Range::Full(RangeBoundary::kRangeBoundaryInt64);
-        return;
-      }
+
+    case Token::kMUL:
+      Range::Mul(left_range, right_range, &min, &max);
       break;
-    }
-    case Token::kSHL: {
+
+    case Token::kSHL:
       Range::Shl(left_range, right_range, &min, &max);
       break;
-    }
-    case Token::kSHR: {
+
+    case Token::kSHR:
       Range::Shr(left_range, right_range, &min, &max);
       break;
-    }
 
     case Token::kBIT_AND:
-      if (!Range::And(left_range, right_range, &min, &max)) {
-        *result = Range::Full(RangeBoundary::kRangeBoundaryInt64);
-        return;
-      }
+      Range::And(left_range, right_range, &min, &max);
       break;
 
     case Token::kBIT_XOR:
       Range::Xor(left_range, right_range, &min, &max);
       break;
 
-    default:
+    case Token::kBIT_OR:
       *result = Range::Full(RangeBoundary::kRangeBoundaryInt64);
       return;
+
+    default:
+      *result = Range(RangeBoundary::NegativeInfinity(),
+                      RangeBoundary::PositiveInfinity());
+      return;
   }
 
   ASSERT(!min.IsUnknown() && !max.IsUnknown());
diff --git a/runtime/vm/flow_graph_range_analysis.h b/runtime/vm/flow_graph_range_analysis.h
index a4bc7e6..3b39ba2 100644
--- a/runtime/vm/flow_graph_range_analysis.h
+++ b/runtime/vm/flow_graph_range_analysis.h
@@ -440,7 +440,7 @@
                   RangeBoundary* max,
                   Definition* left_defn);
 
-  static bool Mul(const Range* left_range,
+  static void Mul(const Range* left_range,
                   const Range* right_range,
                   RangeBoundary* min,
                   RangeBoundary* max);
@@ -454,7 +454,7 @@
                   RangeBoundary* min,
                   RangeBoundary* max);
 
-  static bool And(const Range* left_range,
+  static void And(const Range* left_range,
                   const Range* right_range,
                   RangeBoundary* min,
                   RangeBoundary* max);
diff --git a/runtime/vm/flow_graph_range_analysis_test.cc b/runtime/vm/flow_graph_range_analysis_test.cc
index 781aae2..4b38b44 100644
--- a/runtime/vm/flow_graph_range_analysis_test.cc
+++ b/runtime/vm/flow_graph_range_analysis_test.cc
@@ -531,8 +531,9 @@
                  static_cast<int64_t>(20),
                  static_cast<int64_t>(-20),
                  static_cast<int64_t>(20),
-                 RangeBoundary(),
-                 RangeBoundary());
+                 RangeBoundary::MinConstant(RangeBoundary::kRangeBoundaryInt64),
+                 RangeBoundary::MaxConstant(
+                    RangeBoundary::kRangeBoundaryInt64));
 
 #undef TEST_RANGE_AND
 }
diff --git a/runtime/vm/intermediate_language.cc b/runtime/vm/intermediate_language.cc
index 59f0cb2..8040c50 100644
--- a/runtime/vm/intermediate_language.cc
+++ b/runtime/vm/intermediate_language.cc
@@ -789,6 +789,18 @@
 }
 
 
+bool Instruction::HasUnmatchedInputRepresentations() const {
+  for (intptr_t i = 0; i < InputCount(); i++) {
+    Definition* input = InputAt(i)->definition();
+    if (RequiredInputRepresentation(i) != input->representation()) {
+      return true;
+    }
+  }
+
+  return false;
+}
+
+
 void Definition::ReplaceWith(Definition* other,
                              ForwardInstructionIterator* iterator) {
   // Record other's input uses.
@@ -1205,7 +1217,8 @@
       return false;
 
     case Token::kSHL:
-      return true;
+      return can_overflow() ||
+          !RangeUtils::IsPositive(right()->definition()->range());
 
     case Token::kMOD: {
       UNREACHABLE();
@@ -1228,19 +1241,14 @@
     case Token::kBIT_OR:
     case Token::kBIT_XOR:
       return false;
-    case Token::kSHR: {
-      // Can't deopt if shift-count is known positive.
-      Range* right_range = this->right()->definition()->range();
-      return (right_range == NULL) || !right_range->IsPositive();
-    }
-    case Token::kSHL: {
-      Range* right_range = this->right()->definition()->range();
-      if ((right_range != NULL) && !can_overflow()) {
-        // Can deoptimize if right can be negative.
-        return !right_range->IsPositive();
-      }
-      return true;
-    }
+
+    case Token::kSHR:
+      return !RangeUtils::IsPositive(right()->definition()->range());
+
+    case Token::kSHL:
+      return can_overflow() ||
+          !RangeUtils::IsPositive(right()->definition()->range());
+
     case Token::kMOD: {
       Range* right_range = this->right()->definition()->range();
       return (right_range == NULL) || right_range->Overlaps(0, 0);
@@ -1994,7 +2002,7 @@
 
 
 Definition* UnboxInstr::Canonicalize(FlowGraph* flow_graph) {
-  if (!HasUses()) return NULL;
+  if (!HasUses() && !CanDeoptimize()) return NULL;
 
   // Fold away Unbox<rep>(Box<rep>(v)).
   BoxInstr* box_defn = value()->definition()->AsBox();
@@ -2026,7 +2034,7 @@
 
 
 Definition* UnboxIntegerInstr::Canonicalize(FlowGraph* flow_graph) {
-  if (!HasUses()) return NULL;
+  if (!HasUses() && !CanDeoptimize()) return NULL;
 
   // Fold away UnboxInteger<rep_to>(BoxInteger<rep_from>(v)).
   BoxIntegerInstr* box_defn = value()->definition()->AsBoxInteger();
@@ -2040,7 +2048,7 @@
           box_defn->value()->CopyWithType(),
           (representation() == kUnboxedInt32) ?
               GetDeoptId() : Isolate::kNoDeoptId);
-      if ((representation() == kUnboxedInt32) && is_truncating()) {
+      if ((representation() == kUnboxedInt32) && !CanDeoptimize()) {
         converter->mark_truncating();
       }
       flow_graph->InsertBefore(this, converter, env(), FlowGraph::kValue);
@@ -2071,6 +2079,9 @@
 
     UnboxedConstantInstr* uc =
         new UnboxedConstantInstr(c->value(), kUnboxedInt32);
+    if (c->range() != NULL) {
+      uc->set_range(*c->range());
+    }
     flow_graph->InsertBefore(this, uc, NULL, FlowGraph::kValue);
     return uc;
   }
@@ -2250,19 +2261,12 @@
       return this;
     }
     ComparisonInstr* comp = replacement->AsComparison();
-    if ((comp == NULL) || comp->CanDeoptimize()) {
+    if ((comp == NULL) ||
+        comp->CanDeoptimize() ||
+        comp->HasUnmatchedInputRepresentations()) {
       return this;
     }
 
-    // Assert that the comparison is not serving as a pending deoptimization
-    // target for conversions.
-    for (intptr_t i = 0; i < comp->InputCount(); i++) {
-      if (comp->RequiredInputRepresentation(i) !=
-          comp->InputAt(i)->definition()->representation()) {
-        return this;
-      }
-    }
-
     // Replace the comparison if the replacement is used at this branch,
     // and has exactly one use.
     Value* use = comp->input_use_list();
diff --git a/runtime/vm/intermediate_language.h b/runtime/vm/intermediate_language.h
index 5867762..b877e93 100644
--- a/runtime/vm/intermediate_language.h
+++ b/runtime/vm/intermediate_language.h
@@ -741,6 +741,8 @@
     lifetime_position_ = pos;
   }
 
+  bool HasUnmatchedInputRepresentations() const;
+
   // Returns representation expected for the input operand at the given index.
   virtual Representation RequiredInputRepresentation(intptr_t idx) const {
     return kTagged;
diff --git a/runtime/vm/intermediate_language_arm.cc b/runtime/vm/intermediate_language_arm.cc
index 05ebe6c..0a10286 100644
--- a/runtime/vm/intermediate_language_arm.cc
+++ b/runtime/vm/intermediate_language_arm.cc
@@ -554,16 +554,16 @@
                                            Token::Kind kind) {
   ASSERT(Token::IsEqualityOperator(kind));
   PairLocation* left_pair = locs->in(0).AsPairLocation();
-  Register left1 = left_pair->At(0).reg();
-  Register left2 = left_pair->At(1).reg();
+  Register left_lo = left_pair->At(0).reg();
+  Register left_hi = left_pair->At(1).reg();
   PairLocation* right_pair = locs->in(1).AsPairLocation();
-  Register right1 = right_pair->At(0).reg();
-  Register right2 = right_pair->At(1).reg();
+  Register right_lo = right_pair->At(0).reg();
+  Register right_hi = right_pair->At(1).reg();
 
   // Compare lower.
-  __ cmp(left1, Operand(right1));
+  __ cmp(left_lo, Operand(right_lo));
   // Compare upper if lower is equal.
-  __ cmp(left2, Operand(right2), EQ);
+  __ cmp(left_hi, Operand(right_hi), EQ);
   return TokenKindToMintCondition(kind);
 }
 
@@ -572,11 +572,11 @@
                                              LocationSummary* locs,
                                              Token::Kind kind) {
   PairLocation* left_pair = locs->in(0).AsPairLocation();
-  Register left1 = left_pair->At(0).reg();
-  Register left2 = left_pair->At(1).reg();
+  Register left_lo = left_pair->At(0).reg();
+  Register left_hi = left_pair->At(1).reg();
   PairLocation* right_pair = locs->in(1).AsPairLocation();
-  Register right1 = right_pair->At(0).reg();
-  Register right2 = right_pair->At(1).reg();
+  Register right_lo = right_pair->At(0).reg();
+  Register right_hi = right_pair->At(1).reg();
 
   Register out = locs->temp(0).reg();
 
@@ -600,15 +600,15 @@
       hi_true_cond = hi_false_cond = lo_false_cond = VS;
   }
 
-  Label is_true, is_false, done;
+  Label done;
   // Compare upper halves first.
-  __ cmp(left2, Operand(right2));
+  __ cmp(left_hi, Operand(right_hi));
   __ LoadImmediate(out, 0, hi_false_cond);
   __ LoadImmediate(out, 1, hi_true_cond);
   // If higher words aren't equal, skip comparing lower words.
   __ b(&done, NE);
 
-  __ cmp(left1, Operand(right1));
+  __ cmp(left_lo, Operand(right_lo));
   __ LoadImmediate(out, 1);
   __ LoadImmediate(out, 0, lo_false_cond);
   __ Bind(&done);
@@ -829,7 +829,7 @@
                                    Location::RequiresRegister()));
     locs->set_in(1, Location::Pair(Location::RequiresRegister(),
                                    Location::RequiresRegister()));
-    locs->set_temp(0, Location::RequiresRegister());
+    locs->set_temp(0, Location::RequiresRegister());  // TODO(regis): Improve.
     locs->set_out(0, Location::RequiresRegister());
     return locs;
   }
@@ -903,7 +903,7 @@
   if (operation_cid() == kSmiCid) {
     EmitBranchOnCondition(compiler, true_condition, labels);
   } else if (operation_cid() == kMintCid) {
-    const Register result = locs()->temp(0).reg();
+    const Register result = locs()->temp(0).reg();  // TODO(regis): Improve.
     __ CompareImmediate(result, 1);
     __ b(labels.true_label, EQ);
     __ b(labels.false_label, NE);
@@ -3786,7 +3786,7 @@
 
 
 LocationSummary* BoxInt64Instr::MakeLocationSummary(Isolate* isolate,
-                                                      bool opt) const {
+                                                    bool opt) const {
   const intptr_t kNumInputs = 1;
   const intptr_t kNumTemps = ValueFitsSmi() ? 0 : 1;
   LocationSummary* summary = new(isolate) LocationSummary(
@@ -6207,8 +6207,13 @@
         // Check for overflow.
         if (can_overflow()) {
           // Compare high word from input with shifted high word from output.
-          if (shift > 31) {
-            __ cmp(left_hi, Operand(out_hi));
+          // If shift > 32, also compare low word from input with high word from
+          // output shifted back shift - 32.
+          if (shift > 32) {
+            __ cmp(left_lo, Operand(out_hi, ASR, shift - 32));
+            __ cmp(left_hi, Operand(out_hi, ASR, 31), EQ);
+          } else if (shift == 32) {
+            __ cmp(left_hi, Operand(out_hi, ASR, 31));
           } else {
             __ cmp(left_hi, Operand(out_hi, ASR, shift));
           }
@@ -6233,35 +6238,33 @@
       __ b(deopt, HI);
     }
 
-    __ mov(out_lo, Operand(left_lo));
-    __ mov(out_hi, Operand(left_hi));
-
     switch (op_kind()) {
       case Token::kSHR: {
-        __ cmp(shift, Operand(32));
-
-        __ mov(out_lo, Operand(out_hi), HI);
-        __ Asr(out_hi, out_hi, Operand(31), HI);
-        __ sub(shift, shift, Operand(32), HI);
-
-        __ rsb(IP, shift, Operand(32));
-        __ mov(IP, Operand(out_hi, LSL, IP));
-        __ orr(out_lo, IP, Operand(out_lo, LSR, shift));
-        __ Asr(out_hi, out_hi, shift);
+        __ rsbs(IP, shift, Operand(32));
+        __ sub(IP, shift, Operand(32), MI);
+        __ mov(out_lo, Operand(left_hi, ASR, IP), MI);
+        __ mov(out_lo, Operand(left_lo, LSR, shift), PL);
+        __ orr(out_lo, out_lo, Operand(left_hi, LSL, IP), PL);
+        __ mov(out_hi, Operand(left_hi, ASR, shift));
         break;
       }
       case Token::kSHL: {
         __ rsbs(IP, shift, Operand(32));
         __ sub(IP, shift, Operand(32), MI);
-        __ mov(out_hi, Operand(out_lo, LSL, IP), MI);
-        __ mov(out_hi, Operand(out_hi, LSL, shift), PL);
-        __ orr(out_hi, out_hi, Operand(out_lo, LSR, IP), PL);
-        __ mov(out_lo, Operand(out_lo, LSL, shift));
+        __ mov(out_hi, Operand(left_lo, LSL, IP), MI);
+        __ mov(out_hi, Operand(left_hi, LSL, shift), PL);
+        __ orr(out_hi, out_hi, Operand(left_lo, LSR, IP), PL);
+        __ mov(out_lo, Operand(left_lo, LSL, shift));
 
         // Check for overflow.
         if (can_overflow()) {
+          // If shift > 32, compare low word from input with high word from
+          // output shifted back shift - 32.
+          __ mov(IP, Operand(out_hi, ASR, IP), MI);
+          __ mov(IP, Operand(left_lo), PL);  // No test if shift <= 32.
+          __ cmp(left_lo, Operand(IP));
           // Compare high word from input with shifted high word from output.
-          __ cmp(left_hi, Operand(out_hi, ASR, shift));
+          __ cmp(left_hi, Operand(out_hi, ASR, shift), EQ);
           // Overflow if they aren't equal.
           __ b(deopt, NE);
         }
diff --git a/runtime/vm/intermediate_language_ia32.cc b/runtime/vm/intermediate_language_ia32.cc
index 7eb2995..ce669a3 100644
--- a/runtime/vm/intermediate_language_ia32.cc
+++ b/runtime/vm/intermediate_language_ia32.cc
@@ -5921,7 +5921,6 @@
           __ movl(temp1, left_hi);  // Preserve high 32 bits.
           if (shift > 31) {
             __ movl(left_hi, left_lo);  // Shift by 32.
-            __ xorl(left_lo, left_lo);  // Zero left_lo.
             if (shift > 32) {
               __ shll(left_hi, Immediate(shift - 32));
             }
@@ -5931,6 +5930,15 @@
             __ sarl(temp2, Immediate(31));
             __ cmpl(temp1, temp2);
             __ j(NOT_EQUAL, deopt);
+            if (shift > 32) {
+              // Also compare low word from input with high word from
+              // output shifted back shift - 32.
+              __ movl(temp2, left_hi);
+              __ sarl(temp2, Immediate(shift - 32));
+              __ cmpl(left_lo, temp2);
+              __ j(NOT_EQUAL, deopt);
+            }
+            __ xorl(left_lo, left_lo);  // Zero left_lo.
           } else {
             __ shldl(left_hi, left_lo, Immediate(shift));
             __ shll(left_lo, Immediate(shift));
@@ -6006,7 +6014,6 @@
           __ Bind(&large_shift);
           // No need to subtract 32 from CL, only 5 bits used by shll.
           __ movl(left_hi, left_lo);  // Shift by 32.
-          __ xorl(left_lo, left_lo);  // Zero left_lo.
           __ shll(left_hi, ECX);  // Shift count: CL % 32.
           // Check for overflow by sign extending the high 32 bits
           // and comparing with the input.
@@ -6014,6 +6021,13 @@
           __ sarl(temp2, Immediate(31));
           __ cmpl(temp1, temp2);
           __ j(NOT_EQUAL, deopt);
+          // Also compare low word from input with high word from
+          // output shifted back shift - 32.
+          __ movl(temp2, left_hi);
+          __ sarl(temp2, ECX);  // Shift count: CL % 32.
+          __ cmpl(left_lo, temp2);
+          __ j(NOT_EQUAL, deopt);
+          __ xorl(left_lo, left_lo);  // Zero left_lo.
         } else {
           __ cmpl(ECX, Immediate(31));
           __ j(ABOVE, &large_shift);
diff --git a/runtime/vm/intermediate_language_x64.cc b/runtime/vm/intermediate_language_x64.cc
index 0616adb..accd616 100644
--- a/runtime/vm/intermediate_language_x64.cc
+++ b/runtime/vm/intermediate_language_x64.cc
@@ -3416,7 +3416,7 @@
 
 
 LocationSummary* BoxInt64Instr::MakeLocationSummary(Isolate* isolate,
-                                                      bool opt) const {
+                                                    bool opt) const {
   const intptr_t kNumInputs = 1;
   const intptr_t kNumTemps = 0;
   LocationSummary* summary = new(isolate) LocationSummary(
diff --git a/runtime/vm/method_recognizer.h b/runtime/vm/method_recognizer.h
index 8d4b7274..c6d3f21 100644
--- a/runtime/vm/method_recognizer.h
+++ b/runtime/vm/method_recognizer.h
@@ -155,9 +155,9 @@
 #define CORE_LIB_INTRINSIC_LIST(V)                                             \
   V(_Smi, ~, Smi_bitNegate, 134149043)                                         \
   V(_Smi, get:bitLength, Smi_bitLength, 869986288)                             \
-  V(_Bigint, set:_neg, Bigint_setNeg, 855560832)                               \
-  V(_Bigint, set:_used, Bigint_setUsed, 1792932615)                            \
-  V(_Bigint, _set_digits, Bigint_setDigits, 178162491)                         \
+  V(_Bigint, set:_neg, Bigint_setNeg, 1924982939)                              \
+  V(_Bigint, set:_used, Bigint_setUsed, 1574448752)                            \
+  V(_Bigint, _set_digits, Bigint_setDigits, 1865626071)                        \
   V(_Bigint, _absAdd, Bigint_absAdd, 97148049)                                 \
   V(_Bigint, _absSub, Bigint_absSub, 159012285)                                \
   V(_Bigint, _mulAdd, Bigint_mulAdd, 101252203)                                \
@@ -374,9 +374,12 @@
   V(::, tan, MathTan, 982072809)                                               \
   V(Lists, copy, ListsCopy, 605584668)                                         \
   V(_Bigint, get:_neg, Bigint_getNeg, 1151543890)                              \
+  V(_Bigint, set:_neg, Bigint_setNeg, 1924982939)                              \
   V(_Bigint, get:_used, Bigint_getUsed, 1308559334)                            \
+  V(_Bigint, set:_used, Bigint_setUsed, 1574448752)                            \
   V(_Bigint, get:_digits, Bigint_getDigits, 1408092463)                        \
   V(_Bigint, set:_digits, Bigint_setDigits, 1625268649)                        \
+  V(_Bigint, _set_digits, Bigint_setDigits, 1865626071)                        \
 
 // A list of core function that should never be inlined.
 #define INLINE_BLACK_LIST(V)                                                   \
diff --git a/runtime/vm/object.cc b/runtime/vm/object.cc
index 6eab91a..ace3739 100644
--- a/runtime/vm/object.cc
+++ b/runtime/vm/object.cc
@@ -15904,9 +15904,9 @@
         return raw();
       }
       { // Check for overflow.
-        int cnt = Utils::HighestBit(left_value);
-        if ((cnt + right_value) >= Smi::kBits) {
-          if ((cnt + right_value) >= Mint::kBits) {
+        int cnt = Utils::BitLength(left_value);
+        if ((cnt + right_value) > Smi::kBits) {
+          if ((cnt + right_value) > Mint::kBits) {
             return Bigint::NewFromShiftedInt64(left_value, right_value);
           } else {
             int64_t left_64 = left_value;
diff --git a/runtime/vm/parser.cc b/runtime/vm/parser.cc
index 63b2e68..8f14197 100644
--- a/runtime/vm/parser.cc
+++ b/runtime/vm/parser.cc
@@ -99,6 +99,21 @@
 #endif  // DEBUG
 
 
+class BoolScope : public ValueObject {
+ public:
+  BoolScope(bool* addr, bool new_value) : _addr(addr), _saved_value(*addr) {
+    *_addr = new_value;
+  }
+  ~BoolScope() {
+    *_addr = _saved_value;
+  }
+
+ private:
+  bool* _addr;
+  bool _saved_value;
+};
+
+
 static RawTypeArguments* NewTypeArguments(const GrowableObjectArray& objs) {
   const TypeArguments& a =
       TypeArguments::Handle(TypeArguments::New(objs.Length()));
@@ -3055,9 +3070,8 @@
     OpenAsyncClosure();
   }
 
-  bool saved_await_is_keyword = await_is_keyword_;
-  await_is_keyword_ = func.IsAsyncFunction() || func.is_async_closure();
-
+  BoolScope allow_await(&this->await_is_keyword_,
+                        func.IsAsyncFunction() || func.is_async_closure());
   intptr_t end_token_pos = 0;
   if (CurrentToken() == Token::kLBRACE) {
     ConsumeToken();
@@ -3080,7 +3094,7 @@
       }
     }
     const intptr_t expr_pos = TokenPos();
-    AstNode* expr = ParseExpr(kAllowConst, kConsumeCascades);
+    AstNode* expr = ParseAwaitableExpr(kAllowConst, kConsumeCascades, NULL);
     ASSERT(expr != NULL);
     current_block_->statements->Add(new ReturnNode(expr_pos, expr));
     end_token_pos = TokenPos();
@@ -3126,7 +3140,6 @@
   current_block_->statements->Add(body);
   innermost_function_ = saved_innermost_function.raw();
   last_used_try_index_ = saved_try_index;
-  await_is_keyword_ = saved_await_is_keyword;
   async_temp_scope_ = saved_async_temp_scope;
   parsed_function()->set_saved_try_ctx(saved_saved_try_ctx);
   parsed_function()->set_async_saved_try_ctx_name(
@@ -3482,6 +3495,8 @@
       ExpectToken(Token::kRBRACE);
     } else {
       ConsumeToken();
+      BoolScope allow_await(&this->await_is_keyword_,
+                            async_modifier != RawFunction::kNoModifier);
       SkipExpr();
       method_end_pos = TokenPos();
       ExpectSemicolon();
@@ -5156,6 +5171,8 @@
     ExpectToken(Token::kRBRACE);
   } else if (CurrentToken() == Token::kARROW) {
     ConsumeToken();
+    BoolScope allow_await(&this->await_is_keyword_,
+                          func_modifier != RawFunction::kNoModifier);
     SkipExpr();
     function_end_pos = TokenPos();
     ExpectSemicolon();
@@ -11814,7 +11831,9 @@
     params.skipped = true;
     ParseFormalParameterList(allow_explicit_default_values, false, &params);
   }
-  ParseFunctionModifier();
+  RawFunction::AsyncModifier async_modifier = ParseFunctionModifier();
+  BoolScope allow_await(&this->await_is_keyword_,
+                        async_modifier != RawFunction::kNoModifier);
   if (CurrentToken() == Token::kLBRACE) {
     SkipBlock();
     ExpectToken(Token::kRBRACE);
@@ -12061,7 +12080,8 @@
 
 void Parser::SkipUnaryExpr() {
   if (IsPrefixOperator(CurrentToken()) ||
-      IsIncrementOperator(CurrentToken())) {
+      IsIncrementOperator(CurrentToken()) ||
+      IsAwaitKeyword()) {
     ConsumeToken();
     SkipUnaryExpr();
   } else {
diff --git a/sdk/lib/collection/list.dart b/sdk/lib/collection/list.dart
index ec28fbe..2274b2c 100644
--- a/sdk/lib/collection/list.dart
+++ b/sdk/lib/collection/list.dart
@@ -205,13 +205,13 @@
     return value;
   }
 
-  Iterable<E> skip(int count) => new SubListIterable(this, count, null);
+  Iterable<E> skip(int count) => new SubListIterable<E>(this, count, null);
 
   Iterable<E> skipWhile(bool test(E element)) {
     return new SkipWhileIterable<E>(this, test);
   }
 
-  Iterable<E> take(int count) => new SubListIterable(this, 0, count);
+  Iterable<E> take(int count) => new SubListIterable<E>(this, 0, count);
 
   Iterable<E> takeWhile(bool test(E element)) {
     return new TakeWhileIterable<E>(this, test);
@@ -347,7 +347,7 @@
 
   Iterable<E> getRange(int start, int end) {
     _rangeCheck(start, end);
-    return new SubListIterable(this, start, end);
+    return new SubListIterable<E>(this, start, end);
   }
 
   void removeRange(int start, int end) {
@@ -511,7 +511,7 @@
     }
   }
 
-  Iterable<E> get reversed => new ReversedListIterable(this);
+  Iterable<E> get reversed => new ReversedListIterable<E>(this);
 
   String toString() => IterableBase.iterableToFullString(this, '[', ']');
 }
diff --git a/tests/corelib/big_integer_parsed_arith_vm_test.dart b/tests/corelib/big_integer_parsed_arith_vm_test.dart
index bbf01cc..79dfe1c 100644
--- a/tests/corelib/big_integer_parsed_arith_vm_test.dart
+++ b/tests/corelib/big_integer_parsed_arith_vm_test.dart
@@ -568,7 +568,6 @@
   Expect.equals(a.toLowerCase(), str_back);
 }
 
-
 testBigintBitNot() {
   String zero = "0x0";
   String one = "0x1";
@@ -586,894 +585,6 @@
                "-0x1234567890ABCDEF012345679");
 }
 
-mulDivParsed(String a, String b, String product) {
-  int int_a = int.parse(a);
-  int int_b = int.parse(b);
-  int int_product = int.parse(product);
-  int computed_product = int_a * int_b;
-  Expect.equals(int_product, computed_product);
-  String str_product = computed_product >= 0 ?
-      "0x${computed_product.toRadixString(16)}" :
-      "-0x${(-computed_product).toRadixString(16)}";
-  Expect.equals(product.toLowerCase(), str_product);
-  int computed_product2 = int_b * int_a;
-  Expect.equals(int_product, computed_product2);
-  String str_product2 = computed_product2 >= 0 ?
-      "0x${computed_product2.toRadixString(16)}" :
-      "-0x${(-computed_product2).toRadixString(16)}";
-  Expect.equals(product.toLowerCase(), str_product2);
-
-  if (int_a != 0) {
-    int computed_quotient1 = int_product ~/ int_a;
-    Expect.equals(int_b, computed_quotient1);
-    String str_quotient1 = computed_quotient1 >= 0 ?
-        "0x${computed_quotient1.toRadixString(16)}" :
-        "-0x${(-computed_quotient1).toRadixString(16)}";
-    Expect.equals(b.toLowerCase(), str_quotient1);
-  }
-
-  if (int_b != 0) {
-    int computed_quotient2 = int_product ~/ int_b;
-    Expect.equals(int_a, computed_quotient2);
-    String str_quotient2 = computed_quotient2 >= 0 ?
-        "0x${computed_quotient2.toRadixString(16)}" :
-        "-0x${(-computed_quotient2).toRadixString(16)}";
-    Expect.equals(a.toLowerCase(), str_quotient2);
-  }
-}
-
-testBigintMultiplyDivide() {
-  String zero = "0x0";
-  String one = "0x1";
-  String minus_one = "-0x1";
-
-  mulDivParsed(zero, zero, zero);
-  mulDivParsed(one, one, one);
-  mulDivParsed(one, zero, zero);
-  mulDivParsed(zero, one, zero);
-  mulDivParsed(one, minus_one, minus_one);
-  mulDivParsed(minus_one, minus_one, one);
-  mulDivParsed("0x42", one, "0x42");
-  mulDivParsed("0x42", "0x2", "0x84");
-  mulDivParsed("0xFFFF", "0x2", "0x1FFFE");
-  mulDivParsed("0x3", "0x5", "0xF");
-  mulDivParsed("0xFFFFF", "0x5", "0x4FFFFB");
-  mulDivParsed("0xFFFFFFF", "0x5", "0x4FFFFFFB");
-  mulDivParsed("0xFFFFFFFF", "0x5", "0x4FFFFFFFB");
-  mulDivParsed("0xFFFFFFFFFFFFFFFF", "0x5", "0x4FFFFFFFFFFFFFFFB");
-  mulDivParsed("0xFFFFFFFFFFFFFFFF", "0x3039",
-               "0x3038FFFFFFFFFFFFCFC7");
-  mulDivParsed("0xFFFFFFFFFFFFFFFF",
-               "0xFFFFFFFFFFFFFFFFFFFFFFFFFF",
-               "0xFFFFFFFFFFFFFFFEFFFFFFFFFF0000000000000001");
-  mulDivParsed(
-      "0xFFFFFFFFFFFFFFFF000000000000000000000000000000000000000000000",
-      "0xFFFFFFFFFFFFFFFFFFFFFFFFFF00000000000000000000000000000",
-      "0xFFFFFFFFFFFFFFFEFFFFFFFFFF000000000000000100000000000000"
-      "000000000000000000000000000000000000000000000000000000000000");
-  mulDivParsed("0x10000001", "0x5", "0x50000005");
-  mulDivParsed(
-      "0x1234567890ABCDEF01234567890ABCDEF01234567890ABCDEF"
-      "01234567890ABCDEF01234567890ABCDEF",
-      "0x1234567890ABCDEF01234567890ABCDEF01234567890ABCDEF"
-      "01234567890ABCDEF01234567890ABCDEF",
-      "0x14B66DC328828BCA670CBE52943AA3894CCCE15C8F5ED1E55F"
-      "328F6D3F579F992299850C4B5B95213EF3FB7B4E73B5F43D4299"
-      "5B9F6FD5441C275F2FF89F86F28F47A94CA37481090DCCCDCA6475F09A2F2A521");
-  mulDivParsed(
-      "0x1234567890ABCDEF01234567890ABCDEF01234567890ABCDEF01234567890ABCDEF"
-      "01234567890ABCDEF",
-      "0x1234567890123456789012345678901234567890123456789012345678901234567890"
-      "123456789012345678901234567890123456789012345678901234567890123456789012"
-      "345678901234567890123456789012345678901234567890123456789012345678901234"
-      "567890123456789012345678901234567890123456789012345678901234567890123456"
-      "789012345678901234567890123456789012345678901234567890123456789012345678"
-      "90123456789012345678901234567890",
-      "0x14B66DC327D3C88D7EAA988BBFFA9BBA877826E7EDAF373907A931FBFC3A25231DF7F2"
-      "516F511FB1638F0B570F4A8F0B570F4A8F0B570F4A8F0B570F4A8F0B570F4A8F0B570F4A"
-      "8F0B570F4A8F0B570F4A8F0B570F4A8F0B570F4A8F0B570F4A8F0B570F4A8F0B570F4A8F"
-      "0B570F4A8F0B570F4A8F0B570F4A8F0B570F4A8F0B570F4A8F0B570F4A8F0B570F4A8F0B"
-      "570F4A8F0B570F4A8F0B570F4A8F0B570F4A8F0B570F4A8F0B570F4A8F0B570F4A8F0B57"
-      "0F4A8F0B570F4A8F0B570F4A8F0B570F35D89D93E776C67DD864B2034B5C739007933027"
-      "5CDFD41E07A15D0F5AD5256BED5F1CF91FBA375DE70");
-  mulDivParsed(
-      "0x1FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFF",
-      "0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF",
-      "0x1FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFDFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFF0000000000000000000000000000000000000000000000000000000"
-      "0000000000000000000000000000000000000000000000000000000000000000000001");
-  mulDivParsed(
-      "0x1FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFF",
-      "0x1FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFF",
-      "0x3FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFC0000000000000000000000000000000000000000000000000000000"
-      "000000000000000000000000000000000000000000000000000000000000000000000000"
-      "000000000000000000000000000000000000000000000000000000000000000000000000"
-      "000000000000000000000000000000000000000000000000000000000000000000000000"
-      "000000000000000000000000000000000000000000000000000000000000000000000000"
-      "000000000000000000000000000000000000000000000000000000000000000000000000"
-      "0000000000000000000000000000001");
-
-  // A 256 28-bit digits number squared.
-  mulDivParsed(
-      "0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF",
-      "0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF",
-      "0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
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-      "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-      "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF000000"
-      "000000000000000000000000000000000000000000000000000000000000000000000000"
-      "000000000000000000000000000000000000000000000000000000000000000000000000"
-      "000000000000000000000000000000000000000000000000000000000000000000000000"
-      "000000000000000000000000000000000000000000000000000000000000000000000000"
-      "000000000000000000000000000000000000000000000000000000000000000000000000"
-      "000000000000000000000000000000000000000000000000000000000000000000000000"
-      "000000000000000000000000000000000000000000000000000000000000000000000000"
-      "000000000000000000000000000000000000000000000000000000000000000000000000"
-      "000000000000000000000000000000000000000000000000000000000000000000000000"
-      "000000000000000000000000000000000000000000000000000000000000000000000000"
-      "000000000000000000000000000000000000000000000000000000000000000000000000"
-      "000000000000000000000000000000000000000000000000000000000000000000000000"
-      "000000000000000000000000000000000000000000000000000000000000000000000000"
-      "000000000000000000000000000000000000000000000000000000000000000000000000"
-      "000000000000000000000000000000000000000000000000000000000000000000000000"
-      "000000000000000000000000000000000000000000000000000000000000000000000000"
-      "000000000000000000000000000000000000000000000000000000000000000000000000"
-      "000000000000000000000000000000000000000000000000000000000000000000000000"
-      "000000000000000000000000000000000000000000000000000000000000000000000000"
-      "000000000000000000000000000000000000000000000000000000000000000000000000"
-      "000000000000000000000000000000000000000000000000000000000000000000000000"
-      "000000000000000000000000000000000000000000000000000000000000000000000000"
-      "000000000000000000000000000000000000000000000000000000000000000000000000"
-      "000000000000000000000000000000000000000000000000000000000000000000000000"
-      "0000000000000000000000000000000000000000000000000000000001");
-}
-
-divRemParsed(String a, String b, String quotient, String remainder) {
-  int int_a = int.parse(a);
-  int int_b = int.parse(b);
-  int int_quotient = int.parse(quotient);
-  int int_remainder = int.parse(remainder);
-  int computed_quotient = int_a ~/ int_b;
-  Expect.equals(int_quotient, computed_quotient);
-  String str_quotient = computed_quotient >= 0 ?
-      "0x${computed_quotient.toRadixString(16)}" :
-      "-0x${(-computed_quotient).toRadixString(16)}";
-  Expect.equals(quotient.toLowerCase(), str_quotient);
-  int computed_remainder = int_a.remainder(int_b);
-  Expect.equals(int_remainder, computed_remainder);
-  String str_remainder = computed_remainder >= 0 ?
-      "0x${computed_remainder.toRadixString(16)}" :
-      "-0x${(-computed_remainder).toRadixString(16)}";
-  Expect.equals(remainder.toLowerCase(), str_remainder);
-}
-
-
-testBigintDivideRemainder() {
-  String zero = "0x0";
-  String one = "0x1";
-  String minus_one = "-0x1";
-
-  divRemParsed(one, one, one, zero);
-  divRemParsed(zero, one, zero, zero);
-  divRemParsed(minus_one, one, minus_one, zero);
-  divRemParsed(one, "0x2", zero, one);
-  divRemParsed(minus_one, "0x7", zero, minus_one);
-  divRemParsed("0xB", "0x7", one, "0x4");
-  divRemParsed("0x12345678", "0x7", "0x299C335", "0x5");
-  divRemParsed("-0x12345678", "0x7", "-0x299C335", "-0x5");
-  divRemParsed("0x12345678", "-0x7", "-0x299C335", "0x5");
-  divRemParsed("-0x12345678", "-0x7", "0x299C335", "-0x5");
-  divRemParsed("0x7", "0x12345678", zero, "0x7");
-  divRemParsed("-0x7", "0x12345678", zero, "-0x7");
-  divRemParsed("-0x7", "-0x12345678", zero, "-0x7");
-  divRemParsed("0x7", "-0x12345678", zero, "0x7");
-  divRemParsed("0x12345678", "0x7", "0x299C335", "0x5");
-  divRemParsed("-0x12345678", "0x7", "-0x299C335", "-0x5");
-  divRemParsed("0x12345678", "-0x7", "-0x299C335", "0x5");
-  divRemParsed("-0x12345678", "-0x7", "0x299C335", "-0x5");
-  divRemParsed(
-      "0x14B66DC327D3C88D7EAA988BBFFA9BBA877826E7EDAF373907A931FBFC3A25231DF7F2"
-      "516F511FB1638F0B570F4A8F0B570F4A8F0B570F4A8F0B570F4A8F0B570F4A8F0B570F4A"
-      "8F0B570F4A8F0B570F4A8F0B570F4A8F0B570F4A8F0B570F4A8F0B570F4A8F0B570F4A8F"
-      "0B570F4A8F0B570F4A8F0B570F4A8F0B570F4A8F0B570F4A8F0B570F4A8F0B570F4A8F0B"
-      "570F4A8F0B570F4A8F0B570F4A8F0B570F4A8F0B570F4A8F0B570F4A8F0B570F4A8F0B57"
-      "0F4A8F0B570F4A8F0B570F4A8F0B570F35D89D93E776C67DD864B2034B5C739007933027"
-      "5CDFD41E07A15D0F5AD5256BED5F1CF91FBA375DE70",
-      "0x1234567890ABCDEF01234567890ABCDEF01234567890ABCDEF01234567890ABCDEF"
-      "01234567890ABCDEF",
-      "0x1234567890123456789012345678901234567890123456789012345678901234567890"
-      "123456789012345678901234567890123456789012345678901234567890123456789012"
-      "345678901234567890123456789012345678901234567890123456789012345678901234"
-      "567890123456789012345678901234567890123456789012345678901234567890123456"
-      "789012345678901234567890123456789012345678901234567890123456789012345678"
-      "90123456789012345678901234567890",
-      zero);
-  divRemParsed(
-      "0x14B66DC327D3C88D7EAA988BBFFA9BBA877826E7EDAF373907A931FBFC3A25231DF7F2"
-      "516F511FB1638F0B570F4A8F0B570F4A8F0B570F4A8F0B570F4A8F0B570F4A8F0B570F4A"
-      "8F0B570F4A8F0B570F4A8F0B570F4A8F0B570F4A8F0B570F4A8F0B570F4A8F0B570F4A8F"
-      "0B570F4A8F0B570F4A8F0B570F4A8F0B570F4A8F0B570F4A8F0B570F4A8F0B570F4A8F0B"
-      "570F4A8F0B570F4A8F0B570F4A8F0B570F4A8F0B570F4A8F0B570F4A8F0B570F4A8F0B57"
-      "0F4A8F0B570F4A8F0B570F4A8F0B570F35D89D93E776C67DD864B2034B5C739007933027"
-      "5CDFD41E07A15D0F5AD5256BED5F1CF91FBA375DE71",
-      "0x1234567890ABCDEF01234567890ABCDEF01234567890ABCDEF01234567890ABCDEF"
-      "01234567890ABCDEF",
-      "0x1234567890123456789012345678901234567890123456789012345678901234567890"
-      "123456789012345678901234567890123456789012345678901234567890123456789012"
-      "345678901234567890123456789012345678901234567890123456789012345678901234"
-      "567890123456789012345678901234567890123456789012345678901234567890123456"
-      "789012345678901234567890123456789012345678901234567890123456789012345678"
-      "90123456789012345678901234567890",
-      one);
-  divRemParsed(
-      "0x14B66DC327D3C88D7EAA988BBFFA9BBA877826E7EDAF373907A931FBFC3A25231DF7F2"
-      "516F511FB1638F0B570F4A8F0B570F4A8F0B570F4A8F0B570F4A8F0B570F4A8F0B570F4A"
-      "8F0B570F4A8F0B570F4A8F0B570F4A8F0B570F4A8F0B570F4A8F0B570F4A8F0B570F4A8F"
-      "0B570F4A8F0B570F4A8F0B570F4A8F0B570F4A8F0B570F4A8F0B570F4A8F0B570F4A8F0B"
-      "570F4A8F0B570F4A8F0B570F4A8F0B570F4A8F0B570F4A8F0B570F4A8F0B570F4A8F0B57"
-      "0F4A8F0B570F4A8F0B570F4A8F0B5710591E051CF233A56DEA99087BDC08417F08B6758E"
-      "E5EA90FCF7B39165D365D139DC60403E8743421AC5E",
-      "0x1234567890ABCDEF01234567890ABCDEF01234567890ABCDEF01234567890ABCDEF"
-      "01234567890ABCDEF",
-      "0x1234567890123456789012345678901234567890123456789012345678901234567890"
-      "123456789012345678901234567890123456789012345678901234567890123456789012"
-      "345678901234567890123456789012345678901234567890123456789012345678901234"
-      "567890123456789012345678901234567890123456789012345678901234567890123456"
-      "789012345678901234567890123456789012345678901234567890123456789012345678"
-      "90123456789012345678901234567890",
-      "0x1234567890ABCDEF01234567890ABCDEF01234567890ABCDEF01234567890ABCDEF"
-      "01234567890ABCDEE");
-}
-
 main() {
   testBigintAddSub();
   testBigintLeftShift();
@@ -1482,6 +593,4 @@
   testBigintBitOr();
   testBigintBitXor();
   testBigintBitNot();
-  testBigintMultiplyDivide();
-  testBigintDivideRemainder();
 }
diff --git a/tests/corelib/big_integer_parsed_div_rem_vm_test.dart b/tests/corelib/big_integer_parsed_div_rem_vm_test.dart
index 23525aa..7adf367 100644
--- a/tests/corelib/big_integer_parsed_div_rem_vm_test.dart
+++ b/tests/corelib/big_integer_parsed_div_rem_vm_test.dart
@@ -28,7 +28,6 @@
   Expect.equals(remainder.toLowerCase(), str_remainder);
 }
 
-
 testBigintDivideRemainder() {
   String zero = "0x0";
   String one = "0x1";
diff --git a/tests/corelib/corelib.status b/tests/corelib/corelib.status
index f1be4a96..3e1b2ec 100644
--- a/tests/corelib/corelib.status
+++ b/tests/corelib/corelib.status
@@ -121,6 +121,7 @@
 compare_to2_test: RuntimeError, OK    # Requires bigint support.
 string_base_vm_test: RuntimeError, OK # VM specific test.
 nan_infinity_test/01: Fail # Issue 11551
+regress_r21715_test: RuntimeError # Requires bigint support.
 
 [ $compiler == dart2js && $runtime == none ]
 *: Fail, Pass # TODO(ahe): Triage these tests.
@@ -201,18 +202,9 @@
 list_insert_test: fail
 list_removeat_test: fail
 
-[ $arch == simarm || $arch == simarm64 ]
-big_integer_parsed_*: Pass, Slow
-
-[ $arch == simmips ]
-int_parse_radix_test: Skip # Timeout
-
 [ $arch == simmips || $arch == mips ]
-big_integer_parsed_*: Skip # Timeout. Issue 20879
-big_integer_huge_mul_vm_test: Skip # Timeout
-
-[ $arch == simarm && $checked ]
-num_parse_test: Skip  # Pass, Timeout
+big_integer_parsed_mul_div_vm_test: Skip # Timeout. Issue 20879.
+big_integer_huge_mul_vm_test: Skip # Timeout. Issue 20879.
 
 [ $compiler == dartanalyzer || $compiler == dart2analyzer ]
 error_stack_trace_test: StaticWarning, OK # Test generates errors on purpose.
diff --git a/tests/corelib/regress_r21715_test.dart b/tests/corelib/regress_r21715_test.dart
new file mode 100644
index 0000000..cfbcef1
--- /dev/null
+++ b/tests/corelib/regress_r21715_test.dart
@@ -0,0 +1,17 @@
+// 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.
+
+// VMOptions=--optimization_counter_threshold=5
+
+import "package:expect/expect.dart";
+
+sll(x, shift) => x << shift;
+
+main() {
+  for (int i = 0; i < 10; i++) {
+    var x = 0x50000000;
+    var shift = 34;
+    Expect.equals(sll(x, shift), 0x14000000000000000);
+  }
+}
diff --git a/tests/language/await_future_test.dart b/tests/language/await_future_test.dart
index f1e21bc..c8c3bee 100644
--- a/tests/language/await_future_test.dart
+++ b/tests/language/await_future_test.dart
@@ -20,6 +20,8 @@
   return b;
 }
 
+faa() async => (await bar('faa')).length;
+
 quaz(p) async {
   var x = 0;
   try {
@@ -184,6 +186,8 @@
   for (int i = 0; i < 10; i++) {
     result = await foo();
     Expect.equals(30, result);
+    result = await faa();
+    Expect.equals(3, result);
     result = await quaz(17);
     Expect.equals(17, result);
     result = await quazz();
diff --git a/tests/language/language.status b/tests/language/language.status
index 2c26cee..aa82864 100644
--- a/tests/language/language.status
+++ b/tests/language/language.status
@@ -23,6 +23,7 @@
 async_test/*: Skip
 async_control_structures_test: Skip
 await_test: Skip
+await_regression_test: Skip
 await_for_test: Skip
 await_future_test: Skip
 await_nonfuture_test: Skip
@@ -35,6 +36,7 @@
 async_test/*: Skip
 async_control_structures_test: Skip
 await_test: Skip
+await_regression_test: Skip
 await_for_test: Skip
 await_future_test: Skip
 await_nonfuture_test: Skip
diff --git a/tests/language/vm/canonicalization_preserves_deopt_test.dart b/tests/language/vm/canonicalization_preserves_deopt_test.dart
new file mode 100644
index 0000000..76c97a6
--- /dev/null
+++ b/tests/language/vm/canonicalization_preserves_deopt_test.dart
@@ -0,0 +1,41 @@
+// 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.
+// VMOptions=--optimization_counter_threshold=10 --no-use-osr
+
+import "package:expect/expect.dart";
+
+class X {
+  operator * (other) => "NaNNaNNaNNaNBatman";
+}
+
+foo(x) => (x * 1.0) is double;
+
+bar(x) {
+  try {
+    int i = (x * 1);
+    return true;
+  } catch (e) {
+    return false;
+  }
+}
+
+baz(x) => (x * 1) == x;
+
+main() {
+  for (var i = 0; i < 100; i++) {
+    Expect.isTrue(foo(1.0));
+    assert(() {
+      Expect.isTrue(bar(-1 << 63));
+      return true;
+    });
+    Expect.isTrue(baz(-1 << 63));
+  }
+  Expect.isFalse(foo(new X()));
+  assert(() {
+    Expect.isFalse(bar(new X()));
+    return true;
+  });
+  Expect.isFalse(baz(new X()));
+}
+
diff --git a/tools/VERSION b/tools/VERSION
index 591703c..2b04169 100644
--- a/tools/VERSION
+++ b/tools/VERSION
@@ -26,6 +26,6 @@
 CHANNEL stable
 MAJOR 1
 MINOR 8
-PATCH 2
+PATCH 3
 PRERELEASE 0
 PRERELEASE_PATCH 0