[PATCH] D153128: [AArch64][RCPC3] Add Neon intrinsics for LDAP1 and STL2

[Lucas Prates via Phabricator via cfe-commits]

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This adds new intrisics to support the LDAP1 and STL1 Advanced SIMD
(Neon) instructions introduced as part of FEAT_LRCPC3.
The new intrinsics `vldap1(q)_lane`/`vstl1(q)_lane` generate IR code
similar to the existing `vld1(q)_lane/st1(q)_lane` ones, but capturing
the difference in the atomic release/acquire memory model.

The LLVM code generation changes to ensure that this instruction pair
is lowered to the correct LDAP1/STL1 instructions will be covered in a
separate commit.

Based on a patch by Sam Elliott.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D153128

Files:
  clang/include/clang/Basic/arm_neon.td
  clang/lib/CodeGen/CGBuiltin.cpp
  clang/test/CodeGen/aarch64-neon-ldst-one-rcpc3.c
  clang/utils/TableGen/NeonEmitter.cpp

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