[all-commits] [llvm/llvm-project] 940efa: [amdgpu] Improve the from f32 to i64.

[darkbuck via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 940efa4f6981964c95a69ff412378722438607bf
      https://github.com/llvm/llvm-project/commit/940efa4f6981964c95a69ff412378722438607bf
  Author: Michael Liao <michael.hliao at gmail.com>
  Date:   2021-06-19 (Sat, 19 Jun 2021)

  Changed paths:
    M llvm/lib/Target/AMDGPU/AMDGPUISelLowering.cpp
    M llvm/lib/Target/AMDGPU/AMDGPUISelLowering.h
    M llvm/lib/Target/AMDGPU/AMDGPULegalizerInfo.cpp
    M llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-fptosi.mir
    M llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-fptoui.mir
    M llvm/test/CodeGen/AMDGPU/fp_to_sint.ll
    M llvm/test/CodeGen/AMDGPU/fp_to_uint.ll

  Log Message:
  -----------
  [amdgpu] Improve the from f32 to i64.

- Take the same principle as the conversion from f64 to i64 with extra
  necessary pre- and post-processing. It helps to reduce that conversion
  sequence by half compared to legacy one.

Reviewed By: foad

Differential Revision: https://reviews.llvm.org/D104427