[clang] [llvm] [RISCV][MC] Add experimental `Zvvmtls` and `Zvvmttls` support (PR #198229)

[via cfe-commits]

github-actions[bot] wrote:

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

* 140862 tests passed
* 2817 tests skipped
* 2 tests failed

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

### LLVM
<details>
<summary>LLVM.Transforms/ArgumentPromotion/BPF/argpromotion.ll</summary>

```
Exit Code: 1

Command Output (stdout):
--
# RUN: at line 1
/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/opt -passes=argpromotion -mtriple=bpf-pc-linux -S /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/test/Transforms/ArgumentPromotion/BPF/argpromotion.ll | /home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/FileCheck /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/test/Transforms/ArgumentPromotion/BPF/argpromotion.ll
# executed command: /home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/opt -passes=argpromotion -mtriple=bpf-pc-linux -S /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/test/Transforms/ArgumentPromotion/BPF/argpromotion.ll
# 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/Transforms/ArgumentPromotion/BPF/argpromotion.ll
# .---command stderr------------
# | /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/test/Transforms/ArgumentPromotion/BPF/argpromotion.ll:65:10: error: CHECK: expected string not found in input
# | ; CHECK: i32 @foo1(ptr noundef readonly captures(none) %p1, ptr noundef readonly captures(none) %p2, ptr noundef readonly captures(none) %p3)
# |          ^
# | <stdin>:1:1: note: scanning from here
# | ; ModuleID = '/home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/test/Transforms/ArgumentPromotion/BPF/argpromotion.ll'
# | ^
# | 
# | Input file: <stdin>
# | Check file: /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/test/Transforms/ArgumentPromotion/BPF/argpromotion.ll
# | 
# | -dump-input=help explains the following input dump.
# | 
# | Input was:
# | <<<<<<
# |           1: ; ModuleID = '/home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/test/Transforms/ArgumentPromotion/BPF/argpromotion.ll' 
# | check:65     X~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ error: no match found
# |           2: source_filename = "/home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/test/Transforms/ArgumentPromotion/BPF/argpromotion.ll" 
# | check:65     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# |           3: target datalayout = "e-m:e-p:64:64-i64:64-i128:128-n32:64-S128" 
# | check:65     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# |           4: target triple = "bpf-pc-linux" 
# | check:65     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# |           5:  
# | check:65     ~
# |           6: %struct.t = type { i32, i32, i32, i32, i32, i32, i32 } 
# | check:65     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# |           .
# |           .
# |           .
# | >>>>>>
# `-----------------------------
# error: command failed with exit status: 1

--

```
</details>

### LLVM-Unit
<details>
<summary>LLVM-Unit.TargetParser/_/TargetParserTests/RiscvExtensionsHelp/CheckExtensions</summary>

```
Script:
--
/home/gha/actions-runner/_work/llvm-project/llvm-project/build/unittests/TargetParser/./TargetParserTests --gtest_filter=RiscvExtensionsHelp.CheckExtensions
--
/home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/unittests/TargetParser/RISCVISAInfoTest.cpp:1428
Value of: [](std::string &Captured, std::string &Expected) { return Captured.find(Expected) != std::string::npos; }(CapturedOutput, ExpectedOutput)
  Actual: false
Expected: true


```
</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/198229