[llvm] [AArch64] Tablegen patterns for `shuffle(zext(...))` to `uaddlp` (PR #195120)

[via llvm-commits]

github-actions[bot] wrote:

<!--PREMERGE ADVISOR COMMENT: Linux-->
# :penguin: Linux x64 Test Results

* 173485 tests passed
* 3282 tests skipped
* 1 test failed

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

### LLVM
<details>
<summary>LLVM.CodeGen/AArch64/addp-shuffle.ll</summary>

```
Exit Code: 1

Command Output (stdout):
--
# RUN: at line 2
/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/llc < /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/test/CodeGen/AArch64/addp-shuffle.ll -mtriple=aarch64 | /home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/FileCheck /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/test/CodeGen/AArch64/addp-shuffle.ll --check-prefixes=CHECK,CHECK-NOFP16
# executed command: /home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/llc -mtriple=aarch64
# note: command had no output on stdout or stderr
# executed command: /home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/FileCheck /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/test/CodeGen/AArch64/addp-shuffle.ll --check-prefixes=CHECK,CHECK-NOFP16
# .---command stderr------------
# | /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/test/CodeGen/AArch64/addp-shuffle.ll:163:15: error: CHECK-NEXT: expected string not found in input
# | ; CHECK-NEXT: ushll2 v2.4s, v3.8h, #0
# |               ^
# | <stdin>:170:30: note: scanning from here
# |  umull2 v1.8h, v1.16b, v2.16b
# |                              ^
# | <stdin>:172:2: note: possible intended match here
# |  uaddlp v2.4s, v3.8h
# |  ^
# | 
# | Input file: <stdin>
# | Check file: /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/test/CodeGen/AArch64/addp-shuffle.ll
# | 
# | -dump-input=help explains the following input dump.
# | 
# | Input was:
# | <<<<<<
# |             .
# |             .
# |             .
# |           165:  .type udot, at function 
# |           166: udot: // @udot 
# |           167:  .cfi_startproc 
# |           168: // %bb.0: 
# |           169:  umull v3.8h, v1.8b, v2.8b 
# |           170:  umull2 v1.8h, v1.16b, v2.16b 
# | next:163'0                                  X error: no match found
# |           171:  uaddlp v1.4s, v1.8h 
# | next:163'0     ~~~~~~~~~~~~~~~~~~~~~
# |           172:  uaddlp v2.4s, v3.8h 
# | next:163'0     ~~~~~~~~~~~~~~~~~~~~~
# | next:163'1      ?                    possible intended match
# |           173:  addp v1.4s, v2.4s, v1.4s 
# | next:163'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~
# |           174:  add v0.4s, v0.4s, v1.4s 
# | next:163'0     ~~~~~~~~~~~~~~~~~~~~~~~~~
# |           175:  ret 
# | next:163'0     ~~~~~
# |           176: .Lfunc_end12: 
# | next:163'0     ~~~~~~~~~~~~~~
# |           177:  .size udot, .Lfunc_end12-udot 
# | next:163'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# |             .
# |             .
# |             .
# | >>>>>>
# `-----------------------------
# error: command failed with exit status: 1

--

```
</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/195120