[all-commits] [llvm/llvm-project] c8e339: [VP] Propagate align parameter attr on VP gather/s...

[Fraser Cormack via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: c8e33978fb735059c588c88baa36b3891a90132b
      https://github.com/llvm/llvm-project/commit/c8e33978fb735059c588c88baa36b3891a90132b
  Author: Fraser Cormack <fraser at codeplay.com>
  Date:   2022-01-18 (Tue, 18 Jan 2022)

  Changed paths:
    M llvm/docs/LangRef.rst
    M llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp

  Log Message:
  -----------
  [VP] Propagate align parameter attr on VP gather/scatter to ISel

This patch fixes a case where the 'align' parameter attribute on the
pointer operands to llvm.vp.gather and llvm.vp.scatter was being dropped
during the conversion to the SelectionDAG. The default alignment equal
to the ABI type alignment of the vector type was kept. It also updates
the documentation to reflect the fact that the parameter attribute is
now properly supported.

The default alignment of these intrinsics was previously documented as
being equal to the ABI alignment of the *scalar* type, when in fact that
wasn't the case: the ABI alignment of the vector type was used instead.
This has also been fixed in this patch.

Reviewed By: simoll, craig.topper

Differential Revision: https://reviews.llvm.org/D114423