[all-commits] [llvm/llvm-project] 23d618: [SelectionDAG] Fix fptoi.sat scalable vector lowering

[David Green via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 23d6186be0c9c16b7e99a7601c93d1b774610750
      https://github.com/llvm/llvm-project/commit/23d6186be0c9c16b7e99a7601c93d1b774610750
  Author: David Green <david.green at arm.com>
  Date:   2022-07-21 (Thu, 21 Jul 2022)

  Changed paths:
    M llvm/lib/CodeGen/SelectionDAG/LegalizeVectorOps.cpp
    M llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
    A llvm/test/CodeGen/AArch64/sve-fptosi-sat.ll
    A llvm/test/CodeGen/AArch64/sve-fptoui-sat.ll
    A llvm/test/CodeGen/RISCV/rvv/fptosi-sat.ll
    A llvm/test/CodeGen/RISCV/rvv/fptoui-sat.ll

  Log Message:
  -----------
  [SelectionDAG] Fix fptoi.sat scalable vector lowering

Vector fptosi_sat and fptoui_sat were being expanded by unrolling the
vector operation. This doesn't work for scalable vector, so this patch
adds a call to TLI.expandFP_TO_INT_SAT if the vector is scalable.

Scalable tests are added for AArch64 and RISCV. Some of the AArch64
fptoi_sat operations should be legal, but that will be handled in
another patch.

Differential Revision: https://reviews.llvm.org/D130028