Fix stub cache on ARM, broken in 10864.

src/arm/stub-cache-arm.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 219 matching lines @@
   // Get the map of the receiver and compute the hash.
   __ ldr(scratch, FieldMemOperand(name, String::kHashFieldOffset));
   __ ldr(ip, FieldMemOperand(receiver, HeapObject::kMapOffset));
   __ add(scratch, scratch, Operand(ip));
   uint32_t mask = kPrimaryTableSize - 1;
   // We shift out the last two bits because they are not part of the hash and
   // they are always 01 for maps.
   __ mov(scratch, Operand(scratch, LSR, kHeapObjectTagSize));
   // Mask down the eor argument to the minimum to keep the immediate
   // ARM-encodable.
-  __ eor(scratch, scratch, Operand(flags & mask));
+  __ eor(scratch, scratch, Operand((flags >> kHeapObjectTagSize) & mask));
   // Prefer and_ to ubfx here because ubfx takes 2 cycles.
   __ and_(scratch, scratch, Operand(mask));
 
   // Probe the primary table.
   ProbeTable(isolate,
              masm,
              flags,
              kPrimary,
              receiver,
              name,
              scratch,
              extra,
              extra2,
              extra3);
 
   // Primary miss: Compute hash for secondary probe.
   __ sub(scratch, scratch, Operand(name, LSR, kHeapObjectTagSize));
-  uint32_t mask2 = (kSecondaryTableSize - 1);
+  uint32_t mask2 = kSecondaryTableSize - 1;
   __ add(scratch, scratch, Operand((flags >> kHeapObjectTagSize) & mask2));
   __ and_(scratch, scratch, Operand(mask2));
 
   // Probe the secondary table.
   ProbeTable(isolate,
              masm,
              flags,
              kSecondary,
              receiver,
              name,
@@ skipping 4189 matching lines @@
     __ Jump(ic_slow, RelocInfo::CODE_TARGET);
   }
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_ARM