[PATCH] D106721: [AArch64] Implemnt MSVC __mulh and __umulh builtins and corresponding IR level intrinsics

[Martin Storsjö via Phabricator via cfe-commits]

mstorsjo created this revision.
mstorsjo added reviewers: rnk, STL_MSFT, efriedma, DavidSpickett.
Herald added subscribers: danielkiss, hiraditya, kristof.beyls.
mstorsjo requested review of this revision.
Herald added projects: clang, LLVM.

This seems to work, but would it need more testing for anything else
than just the most trivial happy path cases, and any other tests than
these? (I tried to look for some of the existing tests for MSVC ARM64
intrinsics, but they're all very sparingly tested.)

This should fix PR51128.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D106721

Files:
  clang/include/clang/Basic/BuiltinsAArch64.def
  clang/lib/Headers/intrin.h
  clang/test/CodeGen/arm64-microsoft-intrinsics.c
  llvm/include/llvm/IR/IntrinsicsAArch64.td
  llvm/lib/Target/AArch64/AArch64InstrInfo.td
  llvm/test/CodeGen/AArch64/intrinsics-mulh.ll

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