ubsan shift fixes

src/core/SkBitmapProcState_matrixProcs.cpp

 /*
  * Copyright 2008 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 // The copyright below was added in 2009, but I see no record of moto contributions...?
 
 /* NEON optimized code (C) COPYRIGHT 2009 Motorola
@@ skipping 158 matching lines @@
     return x & 0xFFFF;
 }
 
 // Visual Studio 2010 (MSC_VER=1600) optimizes bit-shift code incorrectly.
 // See http://code.google.com/p/skia/issues/detail?id=472
 #if defined(_MSC_VER) && (_MSC_VER >= 1600)
 #pragma optimize("", off)
 #endif
 
 static inline U16CPU fixed_mirror(SkFixed x) {
-    SkFixed s = x << 15 >> 31;
+    SkFixed s = x * (1 << 15) >> 31;
     // s is FFFFFFFF if we're on an odd interval, or 0 if an even interval
     return (x ^ s) & 0xFFFF;
 }
 
 #if defined(_MSC_VER) && (_MSC_VER >= 1600)
 #pragma optimize("", on)
 #endif
 
 static SkBitmapProcState::FixedTileProc choose_tile_proc(unsigned m) {
     if (SkShader::kClamp_TileMode == m) {
@@ skipping 332 matching lines @@
     if (SkShader::kRepeat_TileMode == fTileModeX && SkShader::kRepeat_TileMode == fTileModeY) {
         return SK_ARM_NEON_WRAP(RepeatX_RepeatY_Procs)[index];
     }
 
     fTileProcX = choose_tile_proc(fTileModeX);
     fTileProcY = choose_tile_proc(fTileModeY);
     fTileLowBitsProcX = choose_tile_lowbits_proc(fTileModeX);
     fTileLowBitsProcY = choose_tile_lowbits_proc(fTileModeY);
     return GeneralXY_Procs[index];
 }