[all-commits] [llvm/llvm-project] c02e4a: Reland "[InstCombine] Fold nested selects"

[Roman Lebedev via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: c02e4a40c4e1be4887748d0ff3849ed613e579d0
      https://github.com/llvm/llvm-project/commit/c02e4a40c4e1be4887748d0ff3849ed613e579d0
  Author: Roman Lebedev <lebedev.ri at gmail.com>
  Date:   2023-01-12 (Thu, 12 Jan 2023)

  Changed paths:
    M llvm/lib/Transforms/InstCombine/InstCombineSelect.cpp
    M llvm/test/Transforms/InstCombine/nested-select.ll
    M llvm/test/Transforms/InstCombine/select-factorize.ll

  Log Message:
  -----------
  Reland "[InstCombine] Fold nested selects"

The change was reverted because one of the changes were suspected of
causing a miscompile, but said miscompile was (confirmed to be) fixed
before the revert happened, by 07ecdd9b1a8af51f07d5f4dfe46845c801482a39.

https://alive2.llvm.org/ce/z/GjCXkB
https://alive2.llvm.org/ce/z/Guz2tt

Fixes https://github.com/llvm/llvm-project/issues/59393

This reverts commit d73383c145ea83d25063246e0c34f5a41fd35293,
and relands commmit 9ddff66d0c9c3e18d56e6b20aa26a2a8cdfb6d2b.