[all-commits] [llvm/llvm-project] ac3dbb: DAG: Fix assert when legalizing v3f16 ldexp

[Matt Arsenault via All-commits]

  Branch: refs/heads/users/arsenm/dag-fix-legalization-ldexp-v3f16
  Home:   https://github.com/llvm/llvm-project
  Commit: ac3dbbffbd191e08f1dec4f9271a1ea3ec512d72
      https://github.com/llvm/llvm-project/commit/ac3dbbffbd191e08f1dec4f9271a1ea3ec512d72
  Author: Matt Arsenault <Matthew.Arsenault at amd.com>
  Date:   2024-06-28 (Fri, 28 Jun 2024)

  Changed paths:
    M llvm/lib/CodeGen/SelectionDAG/LegalizeVectorTypes.cpp
    M llvm/test/CodeGen/AMDGPU/llvm.ldexp.ll

  Log Message:
  -----------
  DAG: Fix assert when legalizing v3f16 ldexp

For the v3f16.v3i32 case, the v3f16 would request widening
to v4f16, but the v3i32 does not require widening to be a legal
type, so GetWidenedVector would fail. We need to widen the exponent
vector to the same element count as the result.

Fixes: SWDEV-470951



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