Jay Foad 598bebeaa6 [AMDGPU] Prefer fmac over fma when selecting FMA_W_CHAIN ...

FMA_W_CHAIN is used when lowering fdiv f32. Prefer to select it to fmac
if there are no source modifiers, just like we do for other mad/mac and
fma/fmac cases.

Differential Revision: https://reviews.llvm.org/D110074

2021-09-21 11:57:45 +01:00

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