[all-commits] [llvm/llvm-project] 03482b: [X86] collectConcatOps - add ability to collect fr...

[Simon Pilgrim via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 03482bccad33274c74b385fc139bbb25be156543
      https://github.com/llvm/llvm-project/commit/03482bccad33274c74b385fc139bbb25be156543
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2022-04-27 (Wed, 27 Apr 2022)

  Changed paths:
    M llvm/lib/Target/X86/X86ISelLowering.cpp
    M llvm/test/CodeGen/X86/oddshuffles.ll
    M llvm/test/CodeGen/X86/oddsubvector.ll
    M llvm/test/CodeGen/X86/pr11334.ll

  Log Message:
  -----------
  [X86] collectConcatOps - add ability to collect from vector 'widening' patterns

Recognise insert_subvector(undef, x, lo/hi) patterns where we double the width of a vector - creating an UNDEF subvector on the fly.