Matt Arsenault a3c814d234 Separately track input and output denormal mode ...

AMDGPU and x86 at least both have separate controls for whether
denormal results are flushed on output, and for whether denormals are
implicitly treated as 0 as an input. The current DAGCombiner use only
really cares about the input treatment of denormals.

2020-02-04 12:59:21 -05:00

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