[PATCH] D144704: [SVE] Add intrinsics for uniform dsp operations that explicitly undefine the result for inactive lanes.

[dewen via Phabricator via llvm-commits]

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This patch adds new intrinsics for uniform dsp operations and changes the lowering for the following builtins to emit calls to the new aarch64.sve.###.u intrinsics.

  svsqsub_x
  svsqsub_n_x
  svuqsub_x
  svuqsub_n_x
  svsqsubr_x
  svsqsubr_n_x
  svuqsubr_x
  svuqsubr_n_x


https://reviews.llvm.org/D144704

Files:
  clang/include/clang/Basic/arm_sve.td
  clang/test/CodeGen/aarch64-sve2-intrinsics/acle_sve2_qsub.c
  clang/test/CodeGen/aarch64-sve2-intrinsics/acle_sve2_qsubr.c
  llvm/include/llvm/IR/IntrinsicsAArch64.td
  llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
  llvm/test/CodeGen/AArch64/sve2-intrinsics-uniform-dsp-undef.ll

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