Fix a recent regression. ClrOpcode is not set for i8; for i8, if
we want to clear %ah to zero before a division, just use a zero-extending mov to %al. This fixes PR3366. llvm-svn: 62691
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we want to clear %ah to zero before a division, just use a zero-extending mov to %al. This fixes PR3366. llvm-svn: 62691