[all-commits] [llvm/llvm-project] e07123: [SystemZ] Consider VST/VL as SimpleBDXStore/Load (...

[Dominik Steenken via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: e071233fa527027c021509fcbd41238aa9bae2e1
      https://github.com/llvm/llvm-project/commit/e071233fa527027c021509fcbd41238aa9bae2e1
  Author: Dominik Steenken <dost at de.ibm.com>
  Date:   2025-04-14 (Mon, 14 Apr 2025)

  Changed paths:
    M llvm/lib/Target/SystemZ/SystemZInstrVector.td
    M llvm/test/CodeGen/SystemZ/vector-constrained-fp-intrinsics.ll
    M llvm/test/CodeGen/SystemZ/zos-prologue-epilog.ll

  Log Message:
  -----------
  [SystemZ] Consider VST/VL as SimpleBDXStore/Load (#135623)

Previously `vst` and `vl` were not considered "simple" BDX stores and
loads, leading to, among other things, some opportunities for `mvc`
optimization to be missed.

This PR addresses this and updates some tests to account for additional
`mvc` instructions being emitted.

This is observed to have a neutral or slightly beneficial effect
performance-wise.



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