[llvm] [AArch64] Prefer SVE2 for fixed-length i64 [S|U][MIN|MAX] reductions (PR #181161)

[via llvm-commits]

github-actions[bot] wrote:

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

* 169754 tests passed
* 3063 tests skipped
* 1 test failed

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

### LLVM
<details>
<summary>LLVM.Transforms/LoopVectorize/VPlan/predicator.ll (Likely Already Failing)</summary>
This test is already failing at the base commit.

```
Exit Code: 1

Command Output (stdout):
--
# RUN: at line 2
/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/opt -disable-output < /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/test/Transforms/LoopVectorize/VPlan/predicator.ll -p loop-vectorize -vplan-print-after=introduceMasksAndLinearize -vplan-print-vector-region-scope 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/Transforms/LoopVectorize/VPlan/predicator.ll
# executed command: /home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/opt -disable-output -p loop-vectorize -vplan-print-after=introduceMasksAndLinearize -vplan-print-vector-region-scope
# 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/VPlan/predicator.ll
# .---command stderr------------
# | /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/test/Transforms/LoopVectorize/VPlan/predicator.ll:101:15: error: CHECK-NEXT: expected string not found in input
# | ; CHECK-NEXT: BLEND ir<%phi4> = ir<%add3>/vp<[[VP7]]> ir<%add0>/vp<[[VP8]]>
# |               ^
# | <stdin>:60:33: note: scanning from here
# |  EMIT vp<%9> = or vp<%7>, vp<%8>
# |                                 ^
# | <stdin>:60:33: note: with "VP7" equal to "%7"
# |  EMIT vp<%9> = or vp<%7>, vp<%8>
# |                                 ^
# | <stdin>:60:33: note: with "VP8" equal to "%8"
# |  EMIT vp<%9> = or vp<%7>, vp<%8>
# |                                 ^
# | <stdin>:61:2: note: possible intended match here
# |  BLEND ir<%phi4> = ir<%add3>/vp<%7> ir<%iv>/vp<%8>
# |  ^
# | 
# | Input file: <stdin>
# | Check file: /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/test/Transforms/LoopVectorize/VPlan/predicator.ll
# | 
# | -dump-input=help explains the following input dump.
# | 
# | Input was:
# | <<<<<<
# |             .
# |             .
# |             .
# |            55:  EMIT ir<%add3> = add ir<%iv>, ir<3>, vp<%7> 
# |            56:  Successor(s): bb4 
# |            57:  
# |            58:  bb4: 
# |            59:  EMIT vp<%8> = not ir<%c0> 
# |            60:  EMIT vp<%9> = or vp<%7>, vp<%8> 
# | next:101'0                                     X error: no match found
# | next:101'1                                       with "VP7" equal to "%7"
# | next:101'2                                       with "VP8" equal to "%8"
# |            61:  BLEND ir<%phi4> = ir<%add3>/vp<%7> ir<%iv>/vp<%8> 
# | next:101'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# | next:101'3      ?                                                  possible intended match
# |            62:  EMIT store ir<%phi4>, ir<%gep>, vp<%9> 
# | next:101'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# |            63:  EMIT ir<%iv.next> = add nuw nsw ir<%iv>, ir<1>, vp<%9> 
# | next:101'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# |            64:  EMIT ir<%ec> = icmp eq ir<%iv.next>, ir<128>, vp<%9> 
# | next:101'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# |            65:  EMIT vp<%index.next> = add nuw vp<%3>, vp<%1> 
# | next:101'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# |            66:  EMIT branch-on-count vp<%index.next>, vp<%2> 
# | next:101'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# |             .
# |             .
# |             .
# | >>>>>>
# `-----------------------------
# 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/181161