Fix thinko in arm transcendental cache probing introduced just before...

src/arm/codegen-arm.cc

 // Copyright 2010 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 8260 matching lines @@
                 true);
     // Input is a HeapNumber. Load it to a double register and store the
     // low and high words into r2, r3.
     __ Ldrd(r2, r3, FieldMemOperand(r0, HeapNumber::kValueOffset));
 
     __ bind(&loaded);
     // r2 = low 32 bits of double value
     // r3 = high 32 bits of double value
     // Compute hash:
     //   h = (low ^ high); h ^= h >> 16; h ^= h >> 8; h = h & (cacheSize - 1);
-    __ eor(r1, r2, Operand(r2));
+    __ eor(r1, r2, Operand(r3));
     __ eor(r1, r1, Operand(r1, LSR, 16));
     __ eor(r1, r1, Operand(r1, LSR, 8));
     ASSERT(IsPowerOf2(TranscendentalCache::kCacheSize));
     if (CpuFeatures::IsSupported(ARMv7)) {
       const int kTranscendentalCacheSizeBits = 9;
       ASSERT_EQ(1 << kTranscendentalCacheSizeBits,
                 TranscendentalCache::kCacheSize);
       __ ubfx(r1, r1, 0, kTranscendentalCacheSizeBits);
     } else {
       __ and_(r1, r1, Operand(TranscendentalCache::kCacheSize - 1));
@@ skipping 2363 matching lines @@
   __ bind(&string_add_runtime);
   __ TailCallRuntime(Runtime::kStringAdd, 2, 1);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_ARM