[llvm] [LLVM][AArch64]Add assembly/disassembly for compare-and-branch instructions (PR #112726)

LLVM Continuous Integration via llvm-commits llvm-commits at lists.llvm.org
Tue Oct 22 01:48:01 PDT 2024 

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `sanitizer-x86_64-linux-bootstrap-ubsan` running on `sanitizer-buildbot4` while building `llvm` at step 2 "annotate".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/25/builds/3493

<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-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:506: note: using lld-link: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/lld-link
llvm-lit: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:506: note: using ld64.lld: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/ld64.lld
llvm-lit: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:506: note: using wasm-ld: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/wasm-ld
llvm-lit: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:506: note: using ld.lld: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/ld.lld
llvm-lit: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:506: note: using lld-link: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/lld-link
llvm-lit: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:506: note: using ld64.lld: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/ld64.lld
llvm-lit: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:506: note: using wasm-ld: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/wasm-ld
llvm-lit: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/main.py:72: note: The test suite configuration requested an individual test timeout of 0 seconds but a timeout of 900 seconds was requested on the command line. Forcing timeout to be 900 seconds.
-- Testing: 86435 tests, 88 workers --
Testing:  0.. 10.. 20.. 30.. 40.. 50.. 60
FAIL: LLVM :: MC/AArch64/CMPBR/cmpbr.s (54433 of 86435)
******************** TEST 'LLVM :: MC/AArch64/CMPBR/cmpbr.s' FAILED ********************
Exit Code: 1

Command Output (stderr):
--
RUN: at line 1: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/llvm-mc -triple=aarch64 -show-encoding -mattr=+cmpbr < /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/test/MC/AArch64/CMPBR/cmpbr.s         | /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/FileCheck /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/test/MC/AArch64/CMPBR/cmpbr.s --check-prefixes=CHECK-ENCODING,CHECK-INST
+ /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/llvm-mc -triple=aarch64 -show-encoding -mattr=+cmpbr
+ /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/FileCheck /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/test/MC/AArch64/CMPBR/cmpbr.s --check-prefixes=CHECK-ENCODING,CHECK-INST
RUN: at line 3: not /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/llvm-mc -triple=aarch64 -show-encoding < /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/test/MC/AArch64/CMPBR/cmpbr.s 2>&1         | /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/FileCheck /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/test/MC/AArch64/CMPBR/cmpbr.s --check-prefix=CHECK-ERROR
+ not /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/llvm-mc -triple=aarch64 -show-encoding
+ /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/FileCheck /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/test/MC/AArch64/CMPBR/cmpbr.s --check-prefix=CHECK-ERROR
RUN: at line 5: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/llvm-mc -triple=aarch64 -filetype=obj -mattr=+cmpbr < /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/test/MC/AArch64/CMPBR/cmpbr.s         | /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/llvm-objdump -d  --no-print-imm-hex --mattr=+cmpbr - | /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/FileCheck /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/test/MC/AArch64/CMPBR/cmpbr.s --check-prefix=CHECK-DISASS
+ /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/llvm-mc -triple=aarch64 -filetype=obj -mattr=+cmpbr
+ /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/FileCheck /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/test/MC/AArch64/CMPBR/cmpbr.s --check-prefix=CHECK-DISASS
+ /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/llvm-objdump -d --no-print-imm-hex --mattr=+cmpbr -
/home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/lib/Target/AArch64/Disassembler/AArch64Disassembler.cpp:502:56: runtime error: left shift of negative value -256
    #0 0x572bdb65371d in DecodePCRelLabel9(llvm::MCInst&, unsigned int, unsigned long, llvm::MCDisassembler const*) /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/lib/Target/AArch64/Disassembler/AArch64Disassembler.cpp:502:56
    #1 0x572bdb64ca84 in llvm::MCDisassembler::DecodeStatus llvm::decodeToMCInst<unsigned int>(llvm::MCDisassembler::DecodeStatus, unsigned int, unsigned int, llvm::MCInst&, unsigned long, llvm::MCDisassembler const*, bool&) /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/lib/Target/AArch64/AArch64GenDisassemblerTables.inc
    #2 0x572bdb642d1d in llvm::MCDisassembler::DecodeStatus llvm::decodeInstruction<unsigned int>(unsigned char const*, llvm::MCInst&, unsigned int, unsigned long, llvm::MCDisassembler const*, llvm::MCSubtargetInfo const&) /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/lib/Target/AArch64/AArch64GenDisassemblerTables.inc:36252:11
    #3 0x572bdb63fe99 in llvm::AArch64Disassembler::getInstruction(llvm::MCInst&, unsigned long&, llvm::ArrayRef<unsigned char>, unsigned long, llvm::raw_ostream&) const /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/lib/Target/AArch64/Disassembler/AArch64Disassembler.cpp:252:9
    #4 0x572bdb33ae59 in disassembleObject(llvm::object::ObjectFile&, llvm::object::ObjectFile const&, (anonymous namespace)::DisassemblerTarget&, std::__1::optional<(anonymous namespace)::DisassemblerTarget>&, llvm::objdump::SourcePrinter&, bool) /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/tools/llvm-objdump/llvm-objdump.cpp:2297:43
    #5 0x572bdb32e94c in disassembleObject /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/tools/llvm-objdump/llvm-objdump.cpp:2657:3
    #6 0x572bdb32e94c in dumpObject(llvm::object::ObjectFile*, llvm::object::Archive const*, llvm::object::Archive::Child const*) /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/tools/llvm-objdump/llvm-objdump.cpp:3319:5
    #7 0x572bdb31d624 in dumpInput /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/tools/llvm-objdump/llvm-objdump.cpp:3402:5
    #8 0x572bdb31d624 in for_each<std::__1::__wrap_iter<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > *>, void (*)(llvm::StringRef)> /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/libcxx_build_ubsan/include/c++/v1/__algorithm/for_each.h:34:5
    #9 0x572bdb31d624 in for_each<std::__1::vector<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >, std::__1::allocator<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > > > &, void (*)(llvm::StringRef)> /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/include/llvm/ADT/STLExtras.h:1730:10
    #10 0x572bdb31d624 in llvm_objdump_main(int, char**, llvm::ToolContext const&) /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/tools/llvm-objdump/llvm-objdump.cpp:3747:3
    #11 0x572bdb40aa3a in main /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/tools/llvm-objdump/llvm-objdump-driver.cpp:17:10
    #12 0x7c99c282a1c9  (/lib/x86_64-linux-gnu/libc.so.6+0x2a1c9) (BuildId: 6d64b17fbac799e68da7ebd9985ddf9b5cb375e6)
    #13 0x7c99c282a28a in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x2a28a) (BuildId: 6d64b17fbac799e68da7ebd9985ddf9b5cb375e6)
    #14 0x572bdb2f7954 in _start (/home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/llvm-objdump+0x20ed954)

SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/lib/Target/AArch64/Disassembler/AArch64Disassembler.cpp:502:56 
/home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/test/MC/AArch64/CMPBR/cmpbr.s:21:18: error: CHECK-DISASS: expected string not found in input
// CHECK-DISASS: cbgt w5, w5, 0xfffffffffffffc00 <.text+0xfffffffffffffc00
                 ^
<stdin>:1:1: note: scanning from here

Step 10 (stage2/ubsan check) failure: stage2/ubsan check (failure)
...
llvm-lit: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:506: note: using lld-link: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/lld-link
llvm-lit: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:506: note: using ld64.lld: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/ld64.lld
llvm-lit: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:506: note: using wasm-ld: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/wasm-ld
llvm-lit: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:506: note: using ld.lld: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/ld.lld
llvm-lit: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:506: note: using lld-link: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/lld-link
llvm-lit: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:506: note: using ld64.lld: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/ld64.lld
llvm-lit: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:506: note: using wasm-ld: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/wasm-ld
llvm-lit: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/main.py:72: note: The test suite configuration requested an individual test timeout of 0 seconds but a timeout of 900 seconds was requested on the command line. Forcing timeout to be 900 seconds.
-- Testing: 86435 tests, 88 workers --
Testing:  0.. 10.. 20.. 30.. 40.. 50.. 60
FAIL: LLVM :: MC/AArch64/CMPBR/cmpbr.s (54433 of 86435)
******************** TEST 'LLVM :: MC/AArch64/CMPBR/cmpbr.s' FAILED ********************
Exit Code: 1

Command Output (stderr):
--
RUN: at line 1: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/llvm-mc -triple=aarch64 -show-encoding -mattr=+cmpbr < /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/test/MC/AArch64/CMPBR/cmpbr.s         | /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/FileCheck /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/test/MC/AArch64/CMPBR/cmpbr.s --check-prefixes=CHECK-ENCODING,CHECK-INST
+ /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/llvm-mc -triple=aarch64 -show-encoding -mattr=+cmpbr
+ /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/FileCheck /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/test/MC/AArch64/CMPBR/cmpbr.s --check-prefixes=CHECK-ENCODING,CHECK-INST
RUN: at line 3: not /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/llvm-mc -triple=aarch64 -show-encoding < /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/test/MC/AArch64/CMPBR/cmpbr.s 2>&1         | /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/FileCheck /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/test/MC/AArch64/CMPBR/cmpbr.s --check-prefix=CHECK-ERROR
+ not /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/llvm-mc -triple=aarch64 -show-encoding
+ /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/FileCheck /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/test/MC/AArch64/CMPBR/cmpbr.s --check-prefix=CHECK-ERROR
RUN: at line 5: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/llvm-mc -triple=aarch64 -filetype=obj -mattr=+cmpbr < /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/test/MC/AArch64/CMPBR/cmpbr.s         | /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/llvm-objdump -d  --no-print-imm-hex --mattr=+cmpbr - | /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/FileCheck /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/test/MC/AArch64/CMPBR/cmpbr.s --check-prefix=CHECK-DISASS
+ /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/llvm-mc -triple=aarch64 -filetype=obj -mattr=+cmpbr
+ /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/FileCheck /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/test/MC/AArch64/CMPBR/cmpbr.s --check-prefix=CHECK-DISASS
+ /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/llvm-objdump -d --no-print-imm-hex --mattr=+cmpbr -
/home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/lib/Target/AArch64/Disassembler/AArch64Disassembler.cpp:502:56: runtime error: left shift of negative value -256
    #0 0x572bdb65371d in DecodePCRelLabel9(llvm::MCInst&, unsigned int, unsigned long, llvm::MCDisassembler const*) /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/lib/Target/AArch64/Disassembler/AArch64Disassembler.cpp:502:56
    #1 0x572bdb64ca84 in llvm::MCDisassembler::DecodeStatus llvm::decodeToMCInst<unsigned int>(llvm::MCDisassembler::DecodeStatus, unsigned int, unsigned int, llvm::MCInst&, unsigned long, llvm::MCDisassembler const*, bool&) /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/lib/Target/AArch64/AArch64GenDisassemblerTables.inc
    #2 0x572bdb642d1d in llvm::MCDisassembler::DecodeStatus llvm::decodeInstruction<unsigned int>(unsigned char const*, llvm::MCInst&, unsigned int, unsigned long, llvm::MCDisassembler const*, llvm::MCSubtargetInfo const&) /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/lib/Target/AArch64/AArch64GenDisassemblerTables.inc:36252:11
    #3 0x572bdb63fe99 in llvm::AArch64Disassembler::getInstruction(llvm::MCInst&, unsigned long&, llvm::ArrayRef<unsigned char>, unsigned long, llvm::raw_ostream&) const /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/lib/Target/AArch64/Disassembler/AArch64Disassembler.cpp:252:9
    #4 0x572bdb33ae59 in disassembleObject(llvm::object::ObjectFile&, llvm::object::ObjectFile const&, (anonymous namespace)::DisassemblerTarget&, std::__1::optional<(anonymous namespace)::DisassemblerTarget>&, llvm::objdump::SourcePrinter&, bool) /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/tools/llvm-objdump/llvm-objdump.cpp:2297:43
    #5 0x572bdb32e94c in disassembleObject /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/tools/llvm-objdump/llvm-objdump.cpp:2657:3
    #6 0x572bdb32e94c in dumpObject(llvm::object::ObjectFile*, llvm::object::Archive const*, llvm::object::Archive::Child const*) /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/tools/llvm-objdump/llvm-objdump.cpp:3319:5
    #7 0x572bdb31d624 in dumpInput /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/tools/llvm-objdump/llvm-objdump.cpp:3402:5
    #8 0x572bdb31d624 in for_each<std::__1::__wrap_iter<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > *>, void (*)(llvm::StringRef)> /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/libcxx_build_ubsan/include/c++/v1/__algorithm/for_each.h:34:5
    #9 0x572bdb31d624 in for_each<std::__1::vector<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >, std::__1::allocator<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > > > &, void (*)(llvm::StringRef)> /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/include/llvm/ADT/STLExtras.h:1730:10
    #10 0x572bdb31d624 in llvm_objdump_main(int, char**, llvm::ToolContext const&) /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/tools/llvm-objdump/llvm-objdump.cpp:3747:3
    #11 0x572bdb40aa3a in main /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/tools/llvm-objdump/llvm-objdump-driver.cpp:17:10
    #12 0x7c99c282a1c9  (/lib/x86_64-linux-gnu/libc.so.6+0x2a1c9) (BuildId: 6d64b17fbac799e68da7ebd9985ddf9b5cb375e6)
    #13 0x7c99c282a28a in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x2a28a) (BuildId: 6d64b17fbac799e68da7ebd9985ddf9b5cb375e6)
    #14 0x572bdb2f7954 in _start (/home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/llvm-objdump+0x20ed954)

SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/lib/Target/AArch64/Disassembler/AArch64Disassembler.cpp:502:56 
/home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/test/MC/AArch64/CMPBR/cmpbr.s:21:18: error: CHECK-DISASS: expected string not found in input
// CHECK-DISASS: cbgt w5, w5, 0xfffffffffffffc00 <.text+0xfffffffffffffc00
                 ^
<stdin>:1:1: note: scanning from here


```

</details>

https://github.com/llvm/llvm-project/pull/112726

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