[all-commits] [llvm/llvm-project] 6e4cea: [AArch64] Fix cost model for `udiv` instruction wh...

[Zain Jaffal via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 6e4cea55f0d1104408b26ac574566a0e4de48036
      https://github.com/llvm/llvm-project/commit/6e4cea55f0d1104408b26ac574566a0e4de48036
  Author: Zain Jaffal <z_jaffal at apple.com>
  Date:   2022-11-28 (Mon, 28 Nov 2022)

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

  Log Message:
  -----------
  [AArch64] Fix cost model for `udiv` instruction when one of the operands is a uniform constant

Currently the model over estimates the cost of a udiv instruction with one constant. The correct cost for a udiv instruction is
insert_cost * extract_cost * num_elements

Reviewed By: dmgreen

Differential Revision: https://reviews.llvm.org/D135991