[all-commits] [llvm/llvm-project] 3c1f0e: [InstSimplify] Add constant fold for extractelemen...

[CarolineConcatto via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 3c1f0e9ef89f7c49fdf383e6b01a61be04614a38
      https://github.com/llvm/llvm-project/commit/3c1f0e9ef89f7c49fdf383e6b01a61be04614a38
  Author: Caroline Concatto <caroline.concatto at arm.com>
  Date:   2021-06-10 (Thu, 10 Jun 2021)

  Changed paths:
    M llvm/lib/IR/ConstantFold.cpp
    M llvm/test/Transforms/InstCombine/gep-vector-indices.ll
    M llvm/test/Transforms/InstSimplify/ConstProp/extractelement-vscale.ll

  Log Message:
  -----------
  [InstSimplify] Add constant fold for extractelement + splat for scalable vectors

This patch allows that scalable vector can fold extractelement and constant splat
only when the lane index is lower than the minimum number of elements of the vector.

Differential Revision: https://reviews.llvm.org/D103180