[all-commits] [llvm/llvm-project] e4a124: [DAG] Fold (srl (shl x, c1), c2) -> and(shl/srl(x, ...

[Simon Pilgrim via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: e4a124dda5933035ab69e7eb5abd838b52b57a40
      https://github.com/llvm/llvm-project/commit/e4a124dda5933035ab69e7eb5abd838b52b57a40
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2022-06-20 (Mon, 20 Jun 2022)

  Changed paths:
    M llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
    M llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
    M llvm/lib/Target/X86/X86ISelLowering.cpp
    M llvm/test/CodeGen/AArch64/ushl_sat.ll
    M llvm/test/CodeGen/AMDGPU/idot8s.ll
    M llvm/test/CodeGen/AMDGPU/llvm.amdgcn.ubfe.ll
    M llvm/test/CodeGen/ARM/umulo-32.ll
    M llvm/test/CodeGen/X86/pr32588.ll
    M llvm/test/CodeGen/X86/pull-binop-through-shift.ll
    M llvm/test/CodeGen/X86/rotate-extract-vector.ll
    M llvm/test/CodeGen/X86/rotate-extract.ll
    M llvm/test/CodeGen/X86/shift-mask.ll

  Log Message:
  -----------
  [DAG] Fold (srl (shl x, c1), c2) -> and(shl/srl(x, c3), m)

Similar to the existing (shl (srl x, c1), c2) fold

Part of the work to fix the regressions in D77804

Differential Revision: https://reviews.llvm.org/D125836