[all-commits] [llvm/llvm-project] b8b075: [AArch64][SVE] Lower MULHU/MULHS nodes to umulh/sm...

[Bradley Smith via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: b8b075d8d744a84de60171c6395fc7c6190d21ca
      https://github.com/llvm/llvm-project/commit/b8b075d8d744a84de60171c6395fc7c6190d21ca
  Author: Bradley Smith <bradley.smith at arm.com>
  Date:   2021-04-20 (Tue, 20 Apr 2021)

  Changed paths:
    M llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
    M llvm/lib/Target/AArch64/AArch64ISelLowering.h
    M llvm/lib/Target/AArch64/AArch64SVEInstrInfo.td
    A llvm/test/CodeGen/AArch64/sve-expand-div.ll
    M llvm/test/CodeGen/AArch64/sve-fixed-length-int-div.ll
    A llvm/test/CodeGen/AArch64/sve-fixed-length-int-mulh.ll
    M llvm/test/CodeGen/AArch64/sve-int-arith-imm.ll
    A llvm/test/CodeGen/AArch64/sve-int-mulh-pred.ll
    A llvm/test/CodeGen/AArch64/sve2-int-mulh.ll

  Log Message:
  -----------
  [AArch64][SVE] Lower MULHU/MULHS nodes to umulh/smulh instructions

Mark MULHS/MULHU nodes as legal for both scalable and fixed SVE types,
and lower them to the appropriate SVE instructions.

Additionally now that the MULH nodes are legal, integer divides can be
expanded into a more performant code sequence.

Differential Revision: https://reviews.llvm.org/D100487