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The Arm backend will usually return false for isFMAFasterThanFMulAndFAdd, where both the fused VFMA.f32 and a non-fused VMLA.f32 are usually available for scalar code. For MVE we don't have the non-fused version though. It makes more sense for isFMAFasterThanFMulAndFAdd to return true, allowing us to simplify some of the existing ISel patterns. The tests here are that non of the existing tests failed, and so we are still selecting VFMA and VFMS. The one test that changed shows we can now select from fast math flags, as opposed to just relying on the isFMADLegalForFAddFSub option. Differential Revision: https://reviews.llvm.org/D69115 |
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