[all-commits] [llvm/llvm-project] e44e24: [AArch64] Improve vector funnel shift by constant ...

[David Green via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: e44e24dfe6ef4a9fff6e1ee6617d89de5b616fd3
      https://github.com/llvm/llvm-project/commit/e44e24dfe6ef4a9fff6e1ee6617d89de5b616fd3
  Author: David Green <david.green at arm.com>
  Date:   2025-03-09 (Sun, 09 Mar 2025)

  Changed paths:
    M llvm/lib/Target/AArch64/AArch64TargetTransformInfo.cpp
    M llvm/test/Analysis/CostModel/AArch64/fshl.ll
    M llvm/test/Analysis/CostModel/AArch64/fshr.ll

  Log Message:
  -----------
  [AArch64] Improve vector funnel shift by constant costs. (#130044)

We now have better codegen, and can have better costs to match. The
generated code should now produce a shl+usra and can be seen in
testcases such as:
https://github.com/llvm/llvm-project/blob/7e5821bae80db3f3f0fe0d5f8ce62f79e548eed5/llvm/test/CodeGen/AArch64/fsh.ll#L3941.



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