[all-commits] [llvm/llvm-project] e9eaee: [AArch64] Reassociate sub(x, add(m1, m2)) to sub(s...

[David Green via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: e9eaee9da196265d20dbeaf7920c24ccb33e2d04
      https://github.com/llvm/llvm-project/commit/e9eaee9da196265d20dbeaf7920c24ccb33e2d04
  Author: David Green <david.green at arm.com>
  Date:   2023-02-13 (Mon, 13 Feb 2023)

  Changed paths:
    M llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
    M llvm/test/CodeGen/AArch64/arm64-vmul.ll
    M llvm/test/CodeGen/AArch64/reassocmls.ll

  Log Message:
  -----------
  [AArch64] Reassociate sub(x, add(m1, m2)) to sub(sub(x, m1), m2)

The mid end will reassociate sub(sub(x, m1), m2) to sub(x, add(m1, m2)). This
reassociates it back to allow the creation of more mls instructions.

Differential Revision: https://reviews.llvm.org/D143143