[llvm] [SelectionDAG] Folding ZERO-EXTEND/SIGN_EXTEND poison to Poison value in getNode (PR #122741)

Mon Apr 21 07:40:42 PDT 2025

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `llvm-clang-key-instructions` running on `sie-linux-worker5` while building `llvm` at step 6 "test-build-unified-tree-check-all".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/208/builds/538

<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/X86/bfloat.ll' FAILED ********************
Exit Code: 1

Command Output (stderr):
--
/home/buildbot/buildbot-root/llvm-ki/build/bin/llc < /home/buildbot/buildbot-root/llvm-ki/llvm-project/llvm/test/CodeGen/X86/bfloat.ll -mtriple=i686-linux-gnu -mattr=avx512bf16,avx512fp16,avx512vl | /home/buildbot/buildbot-root/llvm-ki/build/bin/FileCheck /home/buildbot/buildbot-root/llvm-ki/llvm-project/llvm/test/CodeGen/X86/bfloat.ll --check-prefixes=X86 # RUN: at line 2
+ /home/buildbot/buildbot-root/llvm-ki/build/bin/llc -mtriple=i686-linux-gnu -mattr=avx512bf16,avx512fp16,avx512vl
+ /home/buildbot/buildbot-root/llvm-ki/build/bin/FileCheck /home/buildbot/buildbot-root/llvm-ki/llvm-project/llvm/test/CodeGen/X86/bfloat.ll --check-prefixes=X86
/home/buildbot/buildbot-root/llvm-ki/build/bin/llc < /home/buildbot/buildbot-root/llvm-ki/llvm-project/llvm/test/CodeGen/X86/bfloat.ll -mtriple=x86_64-linux-gnu | /home/buildbot/buildbot-root/llvm-ki/build/bin/FileCheck /home/buildbot/buildbot-root/llvm-ki/llvm-project/llvm/test/CodeGen/X86/bfloat.ll --check-prefixes=CHECK,SSE2 # RUN: at line 3
+ /home/buildbot/buildbot-root/llvm-ki/build/bin/llc -mtriple=x86_64-linux-gnu
+ /home/buildbot/buildbot-root/llvm-ki/build/bin/FileCheck /home/buildbot/buildbot-root/llvm-ki/llvm-project/llvm/test/CodeGen/X86/bfloat.ll --check-prefixes=CHECK,SSE2
[1m/home/buildbot/buildbot-root/llvm-ki/llvm-project/llvm/test/CodeGen/X86/bfloat.ll:845:14: [0m[0;1;31merror: [0m[1mSSE2-NEXT: expected string not found in input
[0m; SSE2-NEXT: xorl %eax, %eax
[0;1;32m             ^
[0m[1m<stdin>:404:9: [0m[0;1;30mnote: [0m[1mscanning from here
[0m# %bb.0:
[0;1;32m        ^
[0m[1m<stdin>:438:2: [0m[0;1;30mnote: [0m[1mpossible intended match here
[0m orl %ebx, %eax
[0;1;32m ^
[0m
Input file: <stdin>
Check file: /home/buildbot/buildbot-root/llvm-ki/llvm-project/llvm/test/CodeGen/X86/bfloat.ll

-dump-input=help explains the following input dump.

Input was:
<<<<<<
[1m[0m[0;1;30m              1: [0m[1m[0;1;46m .file "<stdin>" [0m
[0;1;30m              2: [0m[1m[0;1;46m .text [0m
[0;1;30m              3: [0m[1m[0;1;46m .globl add # -- Begin function add [0m
[0;1;30m              4: [0m[1m[0;1;46m .p2align 4 [0m
[0;1;30m              5: [0m[1m[0;1;46m .type add, at function [0m
[0;1;30m              6: [0m[1m[0;1;46m[0madd:[0;1;46m # @add [0m
[0;1;32mlabel:25'0       ^~~~
[0m[0;1;32mlabel:25'1       ^~~~
[0m[0;1;30m              7: [0m[1m[0;1;46m[0m# %bb.0:[0;1;46m [0m
[0;1;32mcheck:26         ^~~~~~~~
[0m[0;1;30m              8: [0m[1m[0;1;46m [0mpushq %rbx[0;1;46m [0m
[0;1;32mnext:27           ^~~~~~~~~~
[0m[0;1;30m              9: [0m[1m[0;1;46m [0mmovq %rdx, %rbx[0;1;46m [0m
[0;1;32mnext:28           ^~~~~~~~~~~~~~~
[0m[0;1;30m             10: [0m[1m[0;1;46m [0mmovzwl (%rsi), %eax[0;1;46m [0m
[0;1;32mnext:29           ^~~~~~~~~~~~~~~~~~~
[0m[0;1;30m             11: [0m[1m[0;1;46m [0mshll $16, %eax[0;1;46m [0m
[0;1;32mnext:30           ^~~~~~~~~~~~~~
[0m[0;1;30m             12: [0m[1m[0;1;46m [0mmovd %eax, %xmm1[0;1;46m [0m
[0;1;32mnext:31           ^~~~~~~~~~~~~~~~
[0m[0;1;30m             13: [0m[1m[0;1;46m [0mmovzwl (%rdi), %eax[0;1;46m [0m
[0;1;32mnext:32           ^~~~~~~~~~~~~~~~~~~
...

```

</details>

https://github.com/llvm/llvm-project/pull/122741