"If the compiler checked the CPU ID and chose optimized code only for genuine Intel CPUs then I wouldn't have a problem with that."
How about if the generated code just didn't work at all on AMD CPUs? Presumably you wouldn't have a problem with that, since AMD deserves no free ride. On the other hand I don't think users of Intel's compilers would like that feature too much. I don't think they would like it if Intel-produced code failed to use SSE2 on AMD CPUs, but they might not know it's happening.
On the other hand I don't know that Intel-compiler-produced code really fails to use SSE2 on AMD chips, so the discussion is a bit hypothetical.
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