[all-commits] [llvm/llvm-project] de775f: [DAG] Add constant SPLAT handling in getNodes SIGN...

[David Green via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: de775f264d5916d3c67967328b68064ab0d59953
      https://github.com/llvm/llvm-project/commit/de775f264d5916d3c67967328b68064ab0d59953
  Author: David Green <david.green at arm.com>
  Date:   2023-08-08 (Tue, 08 Aug 2023)

  Changed paths:
    M llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
    M llvm/test/CodeGen/AArch64/sve-fp-int-min-max.ll
    A llvm/test/CodeGen/AArch64/sve-splat-sext.ll

  Log Message:
  -----------
  [DAG] Add constant SPLAT handling in getNodes SIGN_EXTEND_INREG

This helps simplify constant splats a little. Without this the code in
llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp#L14072 always returns the
existing node.

Differential Revision: https://reviews.llvm.org/D157259