[all-commits] [llvm/llvm-project] 235465: [RISCV][GISel] Legalize G_{U|S}{ADD|SUB}SAT (#92935)

[Yingwei Zheng via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 235465e40475a3bce1c11b21032844c0c8e14f28
      https://github.com/llvm/llvm-project/commit/235465e40475a3bce1c11b21032844c0c8e14f28
  Author: Yingwei Zheng <dtcxzyw2333 at gmail.com>
  Date:   2024-05-22 (Wed, 22 May 2024)

  Changed paths:
    M llvm/lib/Target/RISCV/GISel/RISCVLegalizerInfo.cpp
    A llvm/test/CodeGen/RISCV/GlobalISel/legalizer/legalize-sat-rv32.mir
    A llvm/test/CodeGen/RISCV/GlobalISel/legalizer/legalize-sat-rv64.mir

  Log Message:
  -----------
  [RISCV][GISel] Legalize G_{U|S}{ADD|SUB}SAT (#92935)

This patch adds support for G_UADDSAT/G_SADDSAT/G_USUBSAT/G_SSUBSAT by
lowering it into add/sub with selects. When zbb is available,
min/max/minu/maxu will be selected.



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