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- The idea is that when a match fails, we just try to match each of +'b', +'w', +'l'. If exactly one matches, we assume this is a mnemonic prefix and accept it. If all match, we assume it is width generic, and take the 'l' form. - This would be a horrible hack, if it weren't so simple. Therefore it is an elegant solution! Chris gets the credit for this particular elegant solution. :) - Next step to making this more robust is to have the X86 matcher generate the mnemonic prefix information. Ideally we would also compute up-front exactly which mnemonic to attempt to match, but this may require more custom code in the matcher than is really worth it. llvm-svn: 103012
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