[PATCH] D111236: [AArch64] Improve fptosi.sat lowering

[Dave Green via Phabricator via llvm-commits]

dmgreen created this revision.
dmgreen added reviewers: SjoerdMeijer, efriedma, kmclaughlin, samtebbs, t.p.northover.
Herald added subscribers: hiraditya, kristof.beyls.
dmgreen requested review of this revision.
Herald added a project: LLVM.

Improve the lowering of scalar fptosi.sat and fptoui.sat for saturating widths smaller than legal types by using the fact that the legal type will saturate under aarch64, and saturating the result further using min/max.


https://reviews.llvm.org/D111236

Files:
  llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
  llvm/test/CodeGen/AArch64/fptosi-sat-scalar.ll
  llvm/test/CodeGen/AArch64/fptosi-sat-vector.ll
  llvm/test/CodeGen/AArch64/fptoui-sat-scalar.ll
  llvm/test/CodeGen/AArch64/fptoui-sat-vector.ll

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