[clang] [llvm] [RISCV][P-ext] Support Packed Absolute Value and Absolute Difference (PR #203840)

[via cfe-commits]

github-actions[bot] wrote:

<!--PREMERGE ADVISOR COMMENT: Windows-->
# :window: Windows x64 Test Results

* 135977 tests passed
* 3458 tests skipped
* 1 test failed

## Failed Tests
(click on a test name to see its output)

### LLVM
<details>
<summary>LLVM.CodeGen/RISCV/rvp-simd-64.ll</summary>

```
Exit Code: 2

Command Output (stdout):
--
# RUN: at line 2
c:\_work\llvm-project\llvm-project\build\bin\llc.exe -mtriple=riscv32 -mattr=+experimental-p,+m,+zbb    -verify-machineinstrs < C:\_work\llvm-project\llvm-project\llvm\test\CodeGen\RISCV\rvp-simd-64.ll |    c:\_work\llvm-project\llvm-project\build\bin\filecheck.exe C:\_work\llvm-project\llvm-project\llvm\test\CodeGen\RISCV\rvp-simd-64.ll --check-prefixes=CHECK,RV32
# executed command: 'c:\_work\llvm-project\llvm-project\build\bin\llc.exe' -mtriple=riscv32 -mattr=+experimental-p,+m,+zbb -verify-machineinstrs
# .---command stderr------------
# | c:\_work\llvm-project\llvm-project\build\bin\llc.exe: error: c:\_work\llvm-project\llvm-project\build\bin\llc.exe: <stdin>:5122:25: error: unknown intrinsic 'llvm.riscv.pabs.v4i16'
# |   %res = call <4 x i16> @llvm.riscv.pabs.v4i16(<4 x i16> %a)
# |                         ^
# `-----------------------------
# error: command failed with exit status: 1
# executed command: 'c:\_work\llvm-project\llvm-project\build\bin\filecheck.exe' 'C:\_work\llvm-project\llvm-project\llvm\test\CodeGen\RISCV\rvp-simd-64.ll' --check-prefixes=CHECK,RV32
# .---command stderr------------
# | FileCheck error: '<stdin>' is empty.
# | FileCheck command line:  c:\_work\llvm-project\llvm-project\build\bin\filecheck.exe C:\_work\llvm-project\llvm-project\llvm\test\CodeGen\RISCV\rvp-simd-64.ll --check-prefixes=CHECK,RV32
# `-----------------------------
# error: command failed with exit status: 2

--

```
</details>

If these failures are unrelated to your changes (for example tests are broken or flaky at HEAD), please open an issue at https://github.com/llvm/llvm-project/issues and add the `infrastructure` label.

https://github.com/llvm/llvm-project/pull/203840