Yes, but checkout the Wikipedia page for Intel's C compiler. It points out that Intel's compiler selects optimum code if the CPU reports "GenuineIntel", but se

Yes, but checkout the Wikipedia page for Intel's C compiler. It points out that Intel's compiler selects optimum code if the CPU reports "GenuineIntel", but selects the least optimum code if the CPU is non-Intel. AMD sued Intel for this, and now Intel has a mumbo-jumbo disclaimer that it may not generate optimum code on a non-Intel CPU (without disclosing that it generates the least optimal code).