[all-commits] [llvm/llvm-project] 959216: [AMDGPU] MIR-Tests for Multiplication using KBA

Jessica Del via All-commits all-commits at lists.llvm.org
Mon Feb 20 23:42:32 PST 2023

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 959216f9b1f1fe0c8817a4e9104a38929247f987
  Author: Jessica Del <Jessica.Del at amd.com>
  Date:   2023-02-21 (Tue, 21 Feb 2023)

  Changed paths:
    A llvm/test/CodeGen/AMDGPU/GlobalISel/mul-known-bits.i64.mir

  Log Message:
  [AMDGPU] MIR-Tests for Multiplication using KBA

These tests show inefficient behavior that will be optimized by a
later change.

By using Known Bits Analysis, we can avoid unnecessary multiplications
or additions with 0.

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