[PATCH] D72139: [ARM] Use isFMAFasterThanFMulAndFAdd for scalars as well as MVE vectors

[Dave Green via Phabricator via llvm-commits]

dmgreen created this revision.
dmgreen added reviewers: SjoerdMeijer, samparker, ostannard, efriedma.
Herald added subscribers: hiraditya, kristof.beyls, dschuff.
Herald added a project: LLVM.

This adds extra scalar handling to isFMAFasterThanFMulAndFAdd, allowing the target independent code to handle more folds in more situations (for example if the fast math flags are present, but the global AllowFPOpFusion option isnt). It also splits apart the HasSlowFPVMLx into HasSlowFPVFMx, to allow VFMA and VMLA to be controlled separately if needed.


https://reviews.llvm.org/D72139

Files:
  llvm/lib/Target/ARM/ARM.td
  llvm/lib/Target/ARM/ARMISelLowering.cpp
  llvm/lib/Target/ARM/ARMPredicates.td
  llvm/lib/Target/ARM/ARMSubtarget.h
  llvm/lib/Target/ARM/ARMTargetTransformInfo.h
  llvm/test/CodeGen/ARM/cortex-a57-misched-vfma.ll
  llvm/test/CodeGen/ARM/fp16-fullfp16.ll
  llvm/test/CodeGen/ARM/fp16-fusedMAC.ll
  llvm/test/CodeGen/Thumb2/float-intrinsics-double.ll
  llvm/test/CodeGen/Thumb2/float-intrinsics-float.ll

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