[PATCH] D140937: [WIP][3/6][Clang][RISCV] Remove default tail-undisturbed for vslidedown intrinsics

[Yueh-Ting (eop) Chen via Phabricator via cfe-commits]

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The destination parameter is removed for non-policy unmasked vslidedown
intrinsics.

The default policy for non-policy (implicit) vslidedown intrinsics will
be tail agnostic and mask undisturbed.

This is the 3rd commit of a patch-set that aims to remove the
IsPrototypeDefaultTU special case for the rvv-intrinsics.

Please refer to the cover letter in the 1st commit (D140895 <https://reviews.llvm.org/D140895>) for an
overview.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D140937

Files:
  clang/include/clang/Basic/riscv_vector.td
  clang/test/CodeGen/RISCV/rvv-intrinsics-overloaded/vslidedown.c
  clang/test/CodeGen/RISCV/rvv-intrinsics/vslidedown.c