[llvm] [IR] Add storermw instruction (PR #207048)

[via llvm-commits]

github-actions[bot] wrote:

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

* 176609 tests passed
* 3567 tests skipped
* 1 test failed

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

### LLVM
<details>
<summary>LLVM.Analysis/IR2Vec/vocab-test.ll</summary>

```
Exit Code: 1

Command Output (stdout):
--
# RUN: at line 2
/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/opt -passes='print<ir2vec-vocab>' -S -o /dev/null -ir2vec-vocab-path=/home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/test/Analysis/IR2Vec/Inputs/dummy_2D_vocab.json /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/test/Analysis/IR2Vec/vocab-test.ll 2> /home/gha/actions-runner/_work/llvm-project/llvm-project/build/test/Analysis/IR2Vec/Output/vocab-test.ll.tmp1.log
# executed command: /home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/opt '-passes=print<ir2vec-vocab>' -S -o /dev/null -ir2vec-vocab-path=/home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/test/Analysis/IR2Vec/Inputs/dummy_2D_vocab.json /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/test/Analysis/IR2Vec/vocab-test.ll
# note: command had no output on stdout or stderr
# RUN: at line 3
diff /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/test/Analysis/IR2Vec/Inputs/reference_default_vocab_print.txt /home/gha/actions-runner/_work/llvm-project/llvm-project/build/test/Analysis/IR2Vec/Output/vocab-test.ll.tmp1.log
# executed command: diff /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/test/Analysis/IR2Vec/Inputs/reference_default_vocab_print.txt /home/gha/actions-runner/_work/llvm-project/llvm-project/build/test/Analysis/IR2Vec/Output/vocab-test.ll.tmp1.log
# .---command stdout------------
# | *** /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/test/Analysis/IR2Vec/Inputs/reference_default_vocab_print.txt
# | --- /home/gha/actions-runner/_work/llvm-project/llvm-project/build/test/Analysis/IR2Vec/Output/vocab-test.ll.tmp1.log
# | ***************
# | *** 67,72 ****
# | --- 67,73 ----
# |   Key: InsertValue:  [ 129.00  130.00 ]
# |   Key: LandingPad:  [ 131.00  132.00 ]
# |   Key: Freeze:  [ 133.00  134.00 ]
# | + Key: StoreRMW:  [ 0.00  0.00 ]
# |   Key: FloatTy:  [ 0.50  1.00 ]
# |   Key: VoidTy:  [ 1.50  2.00 ]
# |   Key: LabelTy:  [ 2.50  3.00 ]
# `-----------------------------
# 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/207048