[all-commits] [llvm/llvm-project] 1bd2a0: [SystemZ] Don't zero extend after a VLGV[BHF] inst...

[Jonas Paulsson via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 1bd2a0ecbafce9fbea329f1b06bb3987126c4581
      https://github.com/llvm/llvm-project/commit/1bd2a0ecbafce9fbea329f1b06bb3987126c4581
  Author: Jonas Paulsson <paulson1 at linux.ibm.com>
  Date:   2026-06-03 (Wed, 03 Jun 2026)

  Changed paths:
    M llvm/lib/Target/SystemZ/SystemZISelDAGToDAG.cpp
    M llvm/lib/Target/SystemZ/SystemZInstrVector.td
    A llvm/test/CodeGen/SystemZ/vec-move-25.ll

  Log Message:
  -----------
  [SystemZ] Don't zero extend after a VLGV[BHF] instruction. (#201109)

The VLGV already zero extends up to 64 bits, so a following zero extend
is not needed.

New TableGen patterns for these cases as well as a handling to avoid
tryRISBGZero() selecting i64 cases.



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