[llvm] [AMDGPU] Add DS loop wait optimization infrastructure (1/4) (PR #171942)

[via llvm-commits]

github-actions[bot] wrote:

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

* 167120 tests passed
* 2949 tests skipped
* 1 test failed

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

### LLVM
<details>
<summary>LLVM.CodeGen/AMDGPU/waitcnt-loop-ds-opt-eligible.mir</summary>

```
Exit Code: 1

Command Output (stdout):
--
# RUN: at line 2
/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/llc -mtriple=amdgcn-amd-amdhsa -mcpu=gfx1250 -run-pass=si-insert-waitcnts -amdgpu-waitcnt-loop-ds-opt -debug-only=si-insert-waitcnts -filetype-null /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/test/CodeGen/AMDGPU/waitcnt-loop-ds-opt-eligible.mir 2>&1 | /home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/FileCheck /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/test/CodeGen/AMDGPU/waitcnt-loop-ds-opt-eligible.mir
# executed command: /home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/llc -mtriple=amdgcn-amd-amdhsa -mcpu=gfx1250 -run-pass=si-insert-waitcnts -amdgpu-waitcnt-loop-ds-opt -debug-only=si-insert-waitcnts -filetype-null /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/test/CodeGen/AMDGPU/waitcnt-loop-ds-opt-eligible.mir
# note: command had no output on stdout or stderr
# error: command failed with exit status: 1
# 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/AMDGPU/waitcnt-loop-ds-opt-eligible.mir
# .---command stderr------------
# | /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/test/CodeGen/AMDGPU/waitcnt-loop-ds-opt-eligible.mir:9:10: error: CHECK: expected string not found in input
# | # CHECK: Loop DS Wait Opt: Loop at bb.1 - 16 DS loads, 8 WMMA/MFMA, {{[0-9]+}} total insts, eligible
# |          ^
# | <stdin>:1:1: note: scanning from here
# | llc: Unknown command line argument '-filetype-null'. Try: '/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/llc --help'
# | ^
# | 
# | Input file: <stdin>
# | Check file: /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/test/CodeGen/AMDGPU/waitcnt-loop-ds-opt-eligible.mir
# | 
# | -dump-input=help explains the following input dump.
# | 
# | Input was:
# | <<<<<<
# |          1: llc: Unknown command line argument '-filetype-null'. Try: '/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/llc --help' 
# | check:9     X~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ error: no match found
# |          2: llc: Did you mean '--filetype'? 
# | check:9     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# | >>>>>>
# `-----------------------------
# 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/171942