[all-commits] [llvm/llvm-project] a5cd19: [SelectionDAG] Don't allow type legalization to cr...

[Craig Topper via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: a5cd198181f937417c988e82f50461adb29aef76
      https://github.com/llvm/llvm-project/commit/a5cd198181f937417c988e82f50461adb29aef76
  Author: Craig Topper <craig.topper at sifive.com>
  Date:   2023-06-13 (Tue, 13 Jun 2023)

  Changed paths:
    M llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
    M llvm/test/CodeGen/RISCV/rvv/fixed-vector-trunc-vp.ll

  Log Message:
  -----------
  [SelectionDAG] Don't allow type legalization to create noop VP_TRUNCATE.

Type legalization may need to promote the result to the same type
as the input. Instead of forming a vp_truncate with the same
source and dest type, don't create any vp_truncate.

Handling in getNode like is done for ISD::TRUNCATE.