[all-commits] [llvm/llvm-project] 6dc3e2: [DAGTypeLegalizer] Handle ZERO_EXTEND of promoted ...

[Jonas Paulsson via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 6dc3e22b575267d2ede36f741bb9eb2455f36cff
      https://github.com/llvm/llvm-project/commit/6dc3e22b575267d2ede36f741bb9eb2455f36cff
  Author: Jonas Paulsson <paulsson at linux.vnet.ibm.com>
  Date:   2020-09-08 (Tue, 08 Sep 2020)

  Changed paths:
    M llvm/lib/CodeGen/SelectionDAG/LegalizeVectorTypes.cpp
    M llvm/test/CodeGen/SystemZ/vec-zext.ll

  Log Message:
  -----------
  [DAGTypeLegalizer] Handle ZERO_EXTEND of promoted type in WidenVecRes_Convert.

On SystemZ, a ZERO_EXTEND of an i1 vector handled by WidenVecRes_Convert()
always ended up being scalarized, because the type action of the input is
promotion which was previously an unhandled case in this method.

This fixes https://bugs.llvm.org/show_bug.cgi?id=47132.

Differential Revision: https://reviews.llvm.org/D86268

Patch by Eli Friedman.
Review: Ulrich Weigand