Richard Sandiford 0897fce2f4 [SystemZ] Optimize floating-point comparisons with zero ...

This follows the same lines as the integer code.  In the end it seemed
easier to have a second 4-bit mask in TSFlags to specify the compare-like
CC values.  That eats one more TSFlags bit than adding a CCHasUnordered
would have done, but it feels more concise.

llvm-svn: 187883

2013-08-07 11:10:06 +00:00

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