[llvm-branch-commits] [llvm] release/22.x: [LoopVectorize] Fix nondeterminism in loop-vectorize (#200833) (PR #203850)

[via llvm-branch-commits]

github-actions[bot] wrote:

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

* 168073 tests passed
* 2993 tests skipped
* 1 test failed

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

### LLVM
<details>
<summary>LLVM.Transforms/LoopVectorize/X86/nondetermisitic-widening-cost.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=loop-vectorize /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/test/Transforms/LoopVectorize/X86/nondetermisitic-widening-cost.ll -S | /home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/FileCheck /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/test/Transforms/LoopVectorize/X86/nondetermisitic-widening-cost.ll
# executed command: /home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/opt --passes=loop-vectorize /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/test/Transforms/LoopVectorize/X86/nondetermisitic-widening-cost.ll -S
# 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/LoopVectorize/X86/nondetermisitic-widening-cost.ll
# .---command stderr------------
# | /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/test/Transforms/LoopVectorize/X86/nondetermisitic-widening-cost.ll:26:15: error: CHECK-NEXT: is not on the line after the previous match
# | ; CHECK-NEXT: [[TMP6:%.*]] = add i64 [[INDEX]], 1
# |               ^
# | <stdin>:25:2: note: 'next' match was here
# |  %5 = add i64 %index, 1
# |  ^
# | <stdin>:23:67: note: previous match ended here
# |  %index = phi i64 [ 0, %vector.ph ], [ %index.next, %vector.body ]
# |                                                                   ^
# | <stdin>:24:1: note: non-matching line after previous match is here
# |  %4 = add i64 %index, 0
# | ^
# | 
# | Input file: <stdin>
# | Check file: /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/test/Transforms/LoopVectorize/X86/nondetermisitic-widening-cost.ll
# | 
# | -dump-input=help explains the following input dump.
# | 
# | Input was:
# | <<<<<<
# |          .
# |          .
# |          .
# |         20:  br label %vector.body 
# |         21:  
# |         22: vector.body: ; preds = %vector.body, %vector.ph 
# |         23:  %index = phi i64 [ 0, %vector.ph ], [ %index.next, %vector.body ] 
# |         24:  %4 = add i64 %index, 0 
# |         25:  %5 = add i64 %index, 1 
# | next:26      !~~~~~~~~~~~~~~~~~~~~~  error: match on wrong line
# |         26:  %6 = add i64 %index, 2 
# |         27:  %7 = add i64 %index, 3 
# |         28:  %8 = add i64 %index, 4 
# |         29:  %9 = add i64 %index, 5 
# |         30:  %10 = add i64 %index, 6 
# |          .
# |          .
# |          .
# | >>>>>>
# `-----------------------------
# 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/203850