[all-commits] [llvm/llvm-project] ca818f: [DAGCombiner] Peek through vector concats when try...

[deadalnix via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: ca818f45500800b2840d080a875818e5224c68e5
      https://github.com/llvm/llvm-project/commit/ca818f45500800b2840d080a875818e5224c68e5
  Author: Amaury Séchet <deadalnix at gmail.com>
  Date:   2019-11-28 (Thu, 28 Nov 2019)

  Changed paths:
    M llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
    M llvm/test/CodeGen/X86/vector-shuffle-combining.ll

  Log Message:
  -----------
  [DAGCombiner] Peek through vector concats when trying to combine shuffles.

Summary: This combine showed up as needed when exploring the regression when processing the DAG in topological order.

Reviewers: craig.topper, efriedma, RKSimon, lebedev.ri

Subscribers: llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D68195