[all-commits] [llvm/llvm-project] cb4a5e: [mlir][tosa] Use math.ctlz intrinsic for tosa.clz

[Rob Suderman via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: cb4a5eae1eb3fb8be8c0cf73aa9b1e6f9279eda6
      https://github.com/llvm/llvm-project/commit/cb4a5eae1eb3fb8be8c0cf73aa9b1e6f9279eda6
  Author: Robert Suderman <suderman at google.com>
  Date:   2022-05-16 (Mon, 16 May 2022)

  Changed paths:
    M mlir/lib/Conversion/MathToLLVM/MathToLLVM.cpp
    M mlir/lib/Conversion/TosaToLinalg/TosaToLinalg.cpp
    M mlir/test/Conversion/TosaToLinalg/tosa-to-linalg.mlir

  Log Message:
  -----------
  [mlir][tosa] Use math.ctlz intrinsic for tosa.clz

We were custom counting per bit for the clz instruction. Math dialect
now has an intrinsic to do this in one instruction. Migrated to this
instruction and fixed a minor bug math-to-llvm for the intrinsic.

Reviewed By: mravishankar

Differential Revision: https://reviews.llvm.org/D125592