Disable 2 intrinsics causing optimizer issues (under investigation).

runtime/lib/bigint.dart

 // 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.
 
 // Copyright 2009 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
 /*
  * Copyright (c) 2003-2005  Tom Wu
@@ skipping 396 matching lines @@
     } else if (_neg) {
       r = -1;
     } else {
       r = 1;
     }
     return r;
   }
 
   // r_digits[0..used] = digits[0..used-1] + a_digits[0..a_used-1].
   // used >= a_used > 0.
-  static void _add(Uint32List digits, int used,
-                   Uint32List a_digits, int a_used,
-                   Uint32List r_digits) {
+  static void _absAdd(Uint32List digits, int used,
+                      Uint32List a_digits, int a_used,
+                      Uint32List r_digits) {
     var c = 0;
     for (var i = 0; i < a_used; i++) {
       c += digits[i] + a_digits[i];
       r_digits[i] = c & DIGIT_MASK;
       c >>= DIGIT_BITS;
     }
     for (var i = a_used; i < used; i++) {
       c += digits[i];
       r_digits[i] = c & DIGIT_MASK;
       c >>= DIGIT_BITS;
     }
     r_digits[used] = c;
   }
 
   // r_digits[0..used-1] = digits[0..used-1] - a_digits[0..a_used-1].
   // used >= a_used > 0.
-  static void _sub(Uint32List digits, int used,
-                   Uint32List a_digits, int a_used,
-                   Uint32List r_digits) {
+  static void _absSub(Uint32List digits, int used,
+                      Uint32List a_digits, int a_used,
+                      Uint32List r_digits) {
     var c = 0;
     for (var i = 0; i < a_used; i++) {
       c += digits[i] - a_digits[i];
       r_digits[i] = c & DIGIT_MASK;
       c >>= DIGIT_BITS;
     }
     for (var i = a_used; i < used; i++) {
       c += digits[i];
       r_digits[i] = c & DIGIT_MASK;
       c >>= DIGIT_BITS;
@@ skipping 12 matching lines @@
       // Set r to 0.
       r._neg = false;
       r._used = 0;
       return;
     }
     if (a_used == 0) {
       _copyTo(r);
       return;
     }
     r._ensureLength(used + 1);
-    _add(_digits, used, a._digits, a_used, r._digits);
+    _absAdd(_digits, used, a._digits, a_used, r._digits);
     r._used = used + 1;
     r._clamp();
   }
 
   // r = abs(this) - abs(a), with abs(this) >= abs(a).
   void _absSubTo(_Bigint a, _Bigint r) {
     assert(_absCompareTo(a) >= 0);
     var used = _used;
     if (used == 0) {
       // Set r to 0.
       r._neg = false;
       r._used = 0;
       return;
     }
     var a_used = a._used;
     if (a_used == 0) {
       _copyTo(r);
       return;
     }
     r._ensureLength(used);
-    _sub(_digits, used, a._digits, a_used, r._digits);
+    _absSub(_digits, used, a._digits, a_used, r._digits);
     r._used = used;
     r._clamp();
   }
 
   // r = abs(this) & abs(a).
   void _absAndTo(_Bigint a, _Bigint r) {
     var r_used = (_used < a._used) ? _used : a._used;
     r._ensureLength(r_used);
     var digits = _digits;
     var a_digits = a._digits;
@@ skipping 938 matching lines @@
   void _sqrTo(_Bigint x, _Bigint r) {
     x._sqrTo(r);
     _reduce(r);
   }
 
   void _mulTo(_Bigint x, _Bigint y, _Bigint r) {
     x._mulTo(y, r);
     _reduce(r);
   }
 }