[clang] [llvm] [AMDGPU] Validate scale_sel in v_cvt_scale_* (PR #227475)

Thu Oct 1 15:01:49 PDT 2026

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `sanitizer-aarch64-linux-bootstrap-msan` running on `sanitizer-buildbot9` while building `clang,llvm` at step 2 "annotate".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/94/builds/21627

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

```
Step 2 (annotate) failure: 'python ../sanitizer_buildbot/sanitizers/zorg/buildbot/builders/sanitizers/buildbot_selector.py' (failure)
...
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:572: note: using ld.lld: /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan/bin/ld.lld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:572: note: using lld-link: /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan/bin/lld-link
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:572: note: using ld64.lld: /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan/bin/ld64.lld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:572: note: using wasm-ld: /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan/bin/wasm-ld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:572: note: using ld.lld: /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan/bin/ld.lld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:572: note: using lld-link: /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan/bin/lld-link
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:572: note: using ld64.lld: /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan/bin/ld64.lld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:572: note: using wasm-ld: /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan/bin/wasm-ld
-- Testing: 104248 tests, 72 workers --
Testing:  0.. 10.. 20.. 30.. 40.. 50.. 60.. 70.. 80.. 90.
FAIL: lld :: COFF/gfids-icf.s (101225 of 104248)
******************** TEST 'lld :: COFF/gfids-icf.s' FAILED ********************
Exit Code: -6

Command Output (stdout):
--
# RUN: at line 2
/home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan/bin/llvm-mc -triple x86_64-windows-msvc /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/lld/test/COFF/gfids-icf.s -filetype=obj -o /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan/tools/lld/test/COFF/Output/gfids-icf.s.tmp.obj
# executed command: /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan/bin/llvm-mc -triple x86_64-windows-msvc /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/lld/test/COFF/gfids-icf.s -filetype=obj -o /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan/tools/lld/test/COFF/Output/gfids-icf.s.tmp.obj
# note: command had no output on stdout or stderr
# RUN: at line 3
/home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan/bin/lld-link /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan/tools/lld/test/COFF/Output/gfids-icf.s.tmp.obj -guard:cf,nolongjmp -out:/home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan/tools/lld/test/COFF/Output/gfids-icf.s.tmp.exe -opt:icf -entry:main
# executed command: /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan/bin/lld-link /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan/tools/lld/test/COFF/Output/gfids-icf.s.tmp.obj -guard:cf,nolongjmp -out:/home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan/tools/lld/test/COFF/Output/gfids-icf.s.tmp.exe -opt:icf -entry:main
# .---command stderr------------
# | PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace and instructions to reproduce the bug.
# | lld-link: warning: '_load_config_used' is misaligned (expected alignment to be 8 bytes, got 1 instead)
# |  #0 0x0000ace89aa9ec70 ___interceptor_backtrace /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/compiler-rt/lib/msan/../sanitizer_common/sanitizer_common_interceptors.inc:4617:13
# |  #1 0x0000ace89acb53fc llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/Support/Unix/Signals.inc:935:7
# |  #2 0x0000ace89acae380 llvm::sys::RunSignalHandlers() /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/Support/Signals.cpp:109:18
# |  #3 0x0000ace89acb69a4 SignalHandler(int, siginfo_t*, void*) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/Support/Unix/Signals.inc:474:38
# |  #4 0x0000ace89aacf160 IsInInterceptorScope /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/compiler-rt/lib/msan/msan_interceptors.cpp:78:10
# |  #5 0x0000ace89aacf160 SignalAction(int, void*, void*) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/compiler-rt/lib/msan/msan_interceptors.cpp:1167:3
# |  #6 0x0000f000173bba20 (linux-vdso.so.1+0xa20)
# |  #7 0x0000f00016e4a4c0 (/usr/lib/aarch64-linux-gnu/libc.so.6+0xaa4c0)
# |  #8 0x0000ace89aadc788 __msan::SetShadow(void const*, unsigned long, unsigned char) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/compiler-rt/lib/msan/msan_poisoning.cpp:217:12
# |  #9 0x0000ace89aadba90 __msan::MsanThread::ClearShadowForThreadStackAndTLS() /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/compiler-rt/lib/msan/msan_thread.cpp:31:7
# | #10 0x0000ace89aadbbc8 malloc_storage /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/compiler-rt/lib/msan/msan_thread.h:45:59
# | #11 0x0000ace89aadbbc8 __msan::MsanThread::Init() /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/compiler-rt/lib/msan/msan_thread.cpp:45:3
# | #12 0x0000ace89aa8478c MsanThreadStartFunc(void*) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/compiler-rt/lib/msan/msan_interceptors.cpp:1186:22
# | #13 0x0000f00016e2c248 (/usr/lib/aarch64-linux-gnu/libc.so.6+0x8c248)
# | #14 0x0000f00016e96b9c (/usr/lib/aarch64-linux-gnu/libc.so.6+0xf6b9c)
# | MemorySanitizer:DEADLYSIGNAL
# | /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build0/bin/llvm-symbolizer: error: 'linux-vdso.so.1': No such file or directory
# `-----------------------------
# error: command failed with exit status: -6

--

********************
Step 11 (stage2/msan check) failure: stage2/msan check (failure)
...
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:572: note: using ld.lld: /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan/bin/ld.lld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:572: note: using lld-link: /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan/bin/lld-link
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:572: note: using ld64.lld: /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan/bin/ld64.lld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:572: note: using wasm-ld: /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan/bin/wasm-ld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:572: note: using ld.lld: /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan/bin/ld.lld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:572: note: using lld-link: /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan/bin/lld-link
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:572: note: using ld64.lld: /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan/bin/ld64.lld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:572: note: using wasm-ld: /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan/bin/wasm-ld
-- Testing: 104248 tests, 72 workers --
Testing:  0.. 10.. 20.. 30.. 40.. 50.. 60.. 70.. 80.. 90.
FAIL: lld :: COFF/gfids-icf.s (101225 of 104248)
******************** TEST 'lld :: COFF/gfids-icf.s' FAILED ********************
Exit Code: -6

Command Output (stdout):
--
# RUN: at line 2
/home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan/bin/llvm-mc -triple x86_64-windows-msvc /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/lld/test/COFF/gfids-icf.s -filetype=obj -o /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan/tools/lld/test/COFF/Output/gfids-icf.s.tmp.obj
# executed command: /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan/bin/llvm-mc -triple x86_64-windows-msvc /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/lld/test/COFF/gfids-icf.s -filetype=obj -o /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan/tools/lld/test/COFF/Output/gfids-icf.s.tmp.obj
# note: command had no output on stdout or stderr
# RUN: at line 3
/home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan/bin/lld-link /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan/tools/lld/test/COFF/Output/gfids-icf.s.tmp.obj -guard:cf,nolongjmp -out:/home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan/tools/lld/test/COFF/Output/gfids-icf.s.tmp.exe -opt:icf -entry:main
# executed command: /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan/bin/lld-link /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan/tools/lld/test/COFF/Output/gfids-icf.s.tmp.obj -guard:cf,nolongjmp -out:/home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan/tools/lld/test/COFF/Output/gfids-icf.s.tmp.exe -opt:icf -entry:main
# .---command stderr------------
# | PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace and instructions to reproduce the bug.
# | lld-link: warning: '_load_config_used' is misaligned (expected alignment to be 8 bytes, got 1 instead)
# |  #0 0x0000ace89aa9ec70 ___interceptor_backtrace /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/compiler-rt/lib/msan/../sanitizer_common/sanitizer_common_interceptors.inc:4617:13
# |  #1 0x0000ace89acb53fc llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/Support/Unix/Signals.inc:935:7
# |  #2 0x0000ace89acae380 llvm::sys::RunSignalHandlers() /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/Support/Signals.cpp:109:18
# |  #3 0x0000ace89acb69a4 SignalHandler(int, siginfo_t*, void*) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/Support/Unix/Signals.inc:474:38
# |  #4 0x0000ace89aacf160 IsInInterceptorScope /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/compiler-rt/lib/msan/msan_interceptors.cpp:78:10
# |  #5 0x0000ace89aacf160 SignalAction(int, void*, void*) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/compiler-rt/lib/msan/msan_interceptors.cpp:1167:3
# |  #6 0x0000f000173bba20 (linux-vdso.so.1+0xa20)
# |  #7 0x0000f00016e4a4c0 (/usr/lib/aarch64-linux-gnu/libc.so.6+0xaa4c0)
# |  #8 0x0000ace89aadc788 __msan::SetShadow(void const*, unsigned long, unsigned char) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/compiler-rt/lib/msan/msan_poisoning.cpp:217:12
# |  #9 0x0000ace89aadba90 __msan::MsanThread::ClearShadowForThreadStackAndTLS() /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/compiler-rt/lib/msan/msan_thread.cpp:31:7
# | #10 0x0000ace89aadbbc8 malloc_storage /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/compiler-rt/lib/msan/msan_thread.h:45:59
# | #11 0x0000ace89aadbbc8 __msan::MsanThread::Init() /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/compiler-rt/lib/msan/msan_thread.cpp:45:3
# | #12 0x0000ace89aa8478c MsanThreadStartFunc(void*) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/compiler-rt/lib/msan/msan_interceptors.cpp:1186:22
# | #13 0x0000f00016e2c248 (/usr/lib/aarch64-linux-gnu/libc.so.6+0x8c248)
# | #14 0x0000f00016e96b9c (/usr/lib/aarch64-linux-gnu/libc.so.6+0xf6b9c)
# | MemorySanitizer:DEADLYSIGNAL
# | /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build0/bin/llvm-symbolizer: error: 'linux-vdso.so.1': No such file or directory
# `-----------------------------
# error: command failed with exit status: -6

--

********************

```

</details>

https://github.com/llvm/llvm-project/pull/227475