[all-commits] [llvm/llvm-project] dbaed5: [SelectionDAG] Add the option of disabling generic...

[Kariddi via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: dbaed589ab85769b684fb49bc5bb71d26907490d
      https://github.com/llvm/llvm-project/commit/dbaed589ab85769b684fb49bc5bb71d26907490d
  Author: Marcello Maggioni <hayarms at gmail.com>
  Date:   2020-05-21 (Thu, 21 May 2020)

  Changed paths:
    M llvm/include/llvm/CodeGen/SelectionDAGTargetInfo.h
    M llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp

  Log Message:
  -----------
  [SelectionDAG] Add the option of disabling generic combines.

Summary:
For some targets generic combines don't really do much and they
consume a disproportionate amount of time.
There's not really a mechanism in SDISel to tactically disable
combines, but we can have a switch to disable all of them and
let the targets just implement what they specifically need.

Subscribers: hiraditya, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D79112