llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `ml-opt-dev-x86-64` running 
on `ml-opt-dev-x86-64-b2` while building `clang,llvm` at step 6 
"test-build-unified-tree-check-all".

Full details are available at: 
https://lab.llvm.org/buildbot/#/builders/137/builds/47170

<details>
<summary>Here is the relevant piece of the build log for the reference</summary>

```
Step 6 (test-build-unified-tree-check-all) failure: test (failure)
******************** TEST 'LLVM :: CodeGen/MLRegAlloc/dev-mode-prio-logging.ll' 
FAILED ********************
Exit Code: 1

Command Output (stdout):
--
# RUN: at line 6
/b/ml-opt-dev-x86-64-b1/build/bin/llc -o /dev/null 
-mtriple=x86_64-linux-unknown -regalloc=greedy    
-regalloc-enable-priority-advisor=development    
-regalloc-priority-training-log=/b/ml-opt-dev-x86-64-b1/build/test/CodeGen/MLRegAlloc/Output/dev-mode-prio-logging.ll.tmp1
    < 
/b/ml-opt-dev-x86-64-b1/llvm-project/llvm/test/CodeGen/MLRegAlloc/Inputs/input.ll
# executed command: /b/ml-opt-dev-x86-64-b1/build/bin/llc -o /dev/null 
-mtriple=x86_64-linux-unknown -regalloc=greedy 
-regalloc-enable-priority-advisor=development 
-regalloc-priority-training-log=/b/ml-opt-dev-x86-64-b1/build/test/CodeGen/MLRegAlloc/Output/dev-mode-prio-logging.ll.tmp1
# RUN: at line 10
"/usr/bin/python3" 
/b/ml-opt-dev-x86-64-b1/llvm-project/llvm/test/CodeGen/MLRegAlloc/../../../lib/Analysis/models/log_reader.py
 
/b/ml-opt-dev-x86-64-b1/build/test/CodeGen/MLRegAlloc/Output/dev-mode-prio-logging.ll.tmp1
 > 
/b/ml-opt-dev-x86-64-b1/build/test/CodeGen/MLRegAlloc/Output/dev-mode-prio-logging.ll.tmp1.readable
# executed command: /usr/bin/python3 
/b/ml-opt-dev-x86-64-b1/llvm-project/llvm/test/CodeGen/MLRegAlloc/../../../lib/Analysis/models/log_reader.py
 
/b/ml-opt-dev-x86-64-b1/build/test/CodeGen/MLRegAlloc/Output/dev-mode-prio-logging.ll.tmp1
# RUN: at line 11
/b/ml-opt-dev-x86-64-b1/build/bin/FileCheck --input-file 
/b/ml-opt-dev-x86-64-b1/build/test/CodeGen/MLRegAlloc/Output/dev-mode-prio-logging.ll.tmp1.readable
 
/b/ml-opt-dev-x86-64-b1/llvm-project/llvm/test/CodeGen/MLRegAlloc/dev-mode-prio-logging.ll
 --check-prefixes=CHECK,NOML
# executed command: /b/ml-opt-dev-x86-64-b1/build/bin/FileCheck --input-file 
/b/ml-opt-dev-x86-64-b1/build/test/CodeGen/MLRegAlloc/Output/dev-mode-prio-logging.ll.tmp1.readable
 
/b/ml-opt-dev-x86-64-b1/llvm-project/llvm/test/CodeGen/MLRegAlloc/dev-mode-prio-logging.ll
 --check-prefixes=CHECK,NOML
# RUN: at line 12
diff 
/b/ml-opt-dev-x86-64-b1/build/test/CodeGen/MLRegAlloc/Output/dev-mode-prio-logging.ll.tmp1.readable
 
/b/ml-opt-dev-x86-64-b1/llvm-project/llvm/test/CodeGen/MLRegAlloc/Inputs/reference-prio-log-noml.txt
# executed command: diff 
/b/ml-opt-dev-x86-64-b1/build/test/CodeGen/MLRegAlloc/Output/dev-mode-prio-logging.ll.tmp1.readable
 
/b/ml-opt-dev-x86-64-b1/llvm-project/llvm/test/CodeGen/MLRegAlloc/Inputs/reference-prio-log-noml.txt
# .---command stdout------------
# | *** 
/b/ml-opt-dev-x86-64-b1/build/test/CodeGen/MLRegAlloc/Output/dev-mode-prio-logging.ll.tmp1.readable
# | --- 
/b/ml-opt-dev-x86-64-b1/llvm-project/llvm/test/CodeGen/MLRegAlloc/Inputs/reference-prio-log-noml.txt
# | ***************
# | *** 237,399 ****
# |   li_size: 0
# |   stage: 0
# |   weight: 0.0
# | ! priority: 2684354816.0
# |   reward: 0.0
# |   observation: 40
# |   li_size: 0
# |   stage: 0
# |   weight: 0.0
# | ! priority: 2684354560.0
# |   reward: 0.0
# |   observation: 41
# |   li_size: 0
# |   stage: 0
# |   weight: 0.0
# |   priority: 2684357888.0
# |   reward: 0.0
# | - observation: 42
# | - li_size: 0
# | - stage: 0
# | - weight: 0.0
# | - priority: 2684354816.0
# | - reward: 0.0
# | - observation: 43
# | - li_size: 0
# | - stage: 0
# | - weight: 0.0
# | - priority: 2684358144.0
...

```

</details>

https://github.com/llvm/llvm-project/pull/220090
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