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This fix was suggested as part of D11345 and is part of fixing PR24141. With this change, we can avoid walking the uses of a divisor node if the target doesn't want the combineRepeatedFPDivisors transform in the first place. There is no NFC-intended other than that. Differential Revision: http://reviews.llvm.org/D11531 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@243498 91177308-0d34-0410-b5e6-96231b3b80d8
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