Jinsong Ji c125af82a5 [DAGCombine] Check reassoc flags in aggressive fsub fusion ...

The is from discussion in https://reviews.llvm.org/D104247#inline-993387

The contract and reassoc flags shouldn't imply each other .

All the aggressive fsub fusion reassociate operations,
we should guard them with reassoc flag check.

Reviewed By: mcberg2017

Differential Revision: https://reviews.llvm.org/D104723

2021-06-23 13:59:40 +00:00

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