[PATCH] D102501: [CodeGen] Add support for widening INSERT_SUBVECTOR operands

[David Sherwood via Phabricator via llvm-commits]

david-arm created this revision.
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When attempting to return something like a <vscale x 1 x i32>
type from a function we end up trying to widen the vector by
inserting a <vscale x 1 x i32> subvector into an undefined
<vscale x 4 x i32> vector. However, during legalisation we
then attempt to widen the INSERT_SUBVECTOR operands and hit
an error in WidenVectorOperand.

This patch adds a new WidenVecOp_INSERT_SUBVECTOR function
that currently only supports inserting subvectors into undefined
vectors.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D102501

Files:
  llvm/lib/CodeGen/SelectionDAG/LegalizeTypes.h
  llvm/lib/CodeGen/SelectionDAG/LegalizeVectorTypes.cpp
  llvm/test/CodeGen/AArch64/sve-calling-convention-mixed.ll
  llvm/test/CodeGen/AArch64/sve-insert-vector.ll

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