disable SkOpts on x86 iOS (simulator)

src/core/SkOpts.cpp

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkOnce.h"
 #include "SkOpts.h"
 #include "SkXfermode_opts.h"
@@ skipping 37 matching lines @@
     decltype(create_xfermode) create_xfermode = SkCreate4pxXfermode;
 
     // Each Init_foo() is defined in src/opts/SkOpts_foo.cpp.
     void Init_sse2();
     void Init_ssse3();
     void Init_sse41();
     void Init_neon();
     //TODO: _dsp2, _armv7, _armv8, _x86, _x86_64, _sse42, _avx, avx2, ... ?
 
     static void init() {
-    #if defined(SK_CPU_X86)
+        // TODO: Chrome's not linking _sse* opts on iOS simulator builds.  Bug or feature?
+    #if defined(SK_CPU_X86) && !defined(SK_BUILD_FOR_IOS)
         uint32_t abcd[] = {0,0,0,0};
         cpuid(abcd);
         if (abcd[3] & (1<<26)) { Init_sse2(); }
         if (abcd[2] & (1<< 9)) { Init_ssse3(); }
         if (abcd[2] & (1<<19)) { Init_sse41(); }
     #elif defined(SK_ARM_HAS_NEON)
         Init_neon();
     #elif defined(SK_CPU_ARM32) && defined(SK_BUILD_FOR_ANDROID)
         if (android_getCpuFeatures() & ANDROID_CPU_ARM_FEATURE_NEON) { Init_neon(); }
     #endif
     }
 
     SK_DECLARE_STATIC_ONCE(gInitOnce);
     void Init() { SkOnce(&gInitOnce, init); }
 
 #if SK_ALLOW_STATIC_GLOBAL_INITIALIZERS
     static struct AutoInit {
         AutoInit() { Init(); }
     } gAutoInit;
 #endif
 }