Merge "Optimizing/x86-64: Use MOVL in Load64BitValue() if IsUint<32>()." am: 8fda759172
am: 5d82869763

* commit '5d82869763ae3238781a0746c6c653e5b1cd4f9a':
  Optimizing/x86-64: Use MOVL in Load64BitValue() if IsUint<32>().