ubsan shift fixes

tests/MathTest.cpp

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkColorPriv.h"
 #include "SkEndian.h"
 #include "SkFloatBits.h"
@@ skipping 543 matching lines @@
 
     unittest_fastfloat(reporter);
     unittest_isfinite(reporter);
     unittest_half(reporter);
     test_rsqrt(reporter);
 
     for (i = 0; i < 10000; i++) {
         SkFixed numer = rand.nextS();
         SkFixed denom = rand.nextS();
         SkFixed result = SkFixedDiv(numer, denom);
-        int64_t check = ((int64_t)numer << 16) / denom;
+        int64_t check = SkLeftShift((int64_t)numer, 16) / denom;
 
         (void)SkCLZ(numer);
         (void)SkCLZ(denom);
 
         REPORTER_ASSERT(reporter, result != (SkFixed)SK_NaN32);
         if (check > SK_MaxS32) {
             check = SK_MaxS32;
         } else if (check < -SK_MaxS32) {
             check = SK_MinS32;
         }
@@ skipping 114 matching lines @@
     test_divmod<int16_t>(r);
 }
 
 DEF_TEST(divmod_s32, r) {
     test_divmod<int32_t>(r);
 }
 
 DEF_TEST(divmod_s64, r) {
     test_divmod<int64_t>(r);
 }