Fix detection of UBFX in case of Word32And with immediate.

src/compiler/arm/instruction-selector-arm.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/compiler/instruction-selector-impl.h"
 #include "src/compiler/node-matchers.h"
 #include "src/compiler-intrinsics.h"
 
 namespace v8 {
 namespace internal {
@@ skipping 400 matching lines @@
     Int32BinopMatcher mright(m.right().node());
     if (mright.right().Is(-1)) {
       EmitBic(this, node, m.left().node(), mright.left().node());
       return;
     }
   }
   if (CpuFeatures::IsSupported(ARMv7) && m.right().HasValue()) {
     uint32_t value = m.right().Value();
     uint32_t width = CompilerIntrinsics::CountSetBits(value);
     uint32_t msb = CompilerIntrinsics::CountLeadingZeros(value);
-    if (msb + width == 32) {
+    if (width != 0 && msb + width == 32) {
       ASSERT_EQ(0, CompilerIntrinsics::CountTrailingZeros(value));
       if (m.left().IsWord32Shr()) {
         Int32BinopMatcher mleft(m.left().node());
         if (mleft.right().IsInRange(0, 31)) {
           Emit(kArmUbfx, g.DefineAsRegister(node),
                g.UseRegister(mleft.left().node()),
                g.UseImmediate(mleft.right().node()), g.TempImmediate(width));
           return;
         }
       }
@@ skipping 448 matching lines @@
     ASSERT(cont->IsSet());
     Emit(cont->Encode(kArmVcmpF64), g.DefineAsRegister(cont->result()),
          g.UseDoubleRegister(m.left().node()),
          g.UseDoubleRegister(m.right().node()));
   }
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8