[all-commits] [llvm/llvm-project] 9f4bc8: AMDGPU: Reduce cost of f64 copysign

[Matt Arsenault via All-commits]

  Branch: refs/heads/users/arsenm/amdgpu/reduce-cost-f64-copysign
  Home:   https://github.com/llvm/llvm-project
  Commit: 9f4bc8d978bbfbd20786433ea77314959b8656c7
      https://github.com/llvm/llvm-project/commit/9f4bc8d978bbfbd20786433ea77314959b8656c7
  Author: Matt Arsenault <Matthew.Arsenault at amd.com>
  Date:   2025-06-17 (Tue, 17 Jun 2025)

  Changed paths:
    M llvm/lib/Target/AMDGPU/AMDGPUTargetTransformInfo.cpp
    M llvm/test/Analysis/CostModel/AMDGPU/copysign.ll

  Log Message:
  -----------
  AMDGPU: Reduce cost of f64 copysign

The real implementation is 1 real instruction plus a constant
materialize. Call that a 1, it's not a real f64 operation.



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