[llvm] [NFCI][Globals] In GlobalObjects::setSectionPrefix, do conditional update if existing prefix is not equivalent to the new one. Returns whether prefix changed. (PR #158460)

Tue Sep 16 22:17:23 PDT 2025

llvm-ci wrote:

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

Full details are available at: https://lab.llvm.org/buildbot/#/builders/169/builds/14972

<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-fast/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:530: note: using lld-link: /home/b/sanitizer-x86_64-linux-fast/build/llvm_build_asan_ubsan/bin/lld-link
llvm-lit: /home/b/sanitizer-x86_64-linux-fast/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:530: note: using ld64.lld: /home/b/sanitizer-x86_64-linux-fast/build/llvm_build_asan_ubsan/bin/ld64.lld
llvm-lit: /home/b/sanitizer-x86_64-linux-fast/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:530: note: using wasm-ld: /home/b/sanitizer-x86_64-linux-fast/build/llvm_build_asan_ubsan/bin/wasm-ld
llvm-lit: /home/b/sanitizer-x86_64-linux-fast/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:530: note: using ld.lld: /home/b/sanitizer-x86_64-linux-fast/build/llvm_build_asan_ubsan/bin/ld.lld
llvm-lit: /home/b/sanitizer-x86_64-linux-fast/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:530: note: using lld-link: /home/b/sanitizer-x86_64-linux-fast/build/llvm_build_asan_ubsan/bin/lld-link
llvm-lit: /home/b/sanitizer-x86_64-linux-fast/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:530: note: using ld64.lld: /home/b/sanitizer-x86_64-linux-fast/build/llvm_build_asan_ubsan/bin/ld64.lld
llvm-lit: /home/b/sanitizer-x86_64-linux-fast/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:530: note: using wasm-ld: /home/b/sanitizer-x86_64-linux-fast/build/llvm_build_asan_ubsan/bin/wasm-ld
llvm-lit: /home/b/sanitizer-x86_64-linux-fast/build/llvm-project/llvm/utils/lit/lit/main.py:74: 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: 91977 tests, 64 workers --
Testing:  0.. 10.. 20.. 30.. 40.. 50.. 60
FAIL: LLVM :: CodeGen/X86/memcmp-pgso.ll (14081 of 91977)
******************** TEST 'LLVM :: CodeGen/X86/memcmp-pgso.ll' FAILED ********************
Exit Code: 1

Command Output (stdout):
--
# RUN: at line 2
/home/b/sanitizer-x86_64-linux-fast/build/llvm_build_asan_ubsan/bin/llc < /home/b/sanitizer-x86_64-linux-fast/build/llvm-project/llvm/test/CodeGen/X86/memcmp-pgso.ll -mtriple=x86_64-unknown-unknown | /home/b/sanitizer-x86_64-linux-fast/build/llvm_build_asan_ubsan/bin/FileCheck /home/b/sanitizer-x86_64-linux-fast/build/llvm-project/llvm/test/CodeGen/X86/memcmp-pgso.ll --check-prefixes=X64,X64-SSE2
# executed command: /home/b/sanitizer-x86_64-linux-fast/build/llvm_build_asan_ubsan/bin/llc -mtriple=x86_64-unknown-unknown
# note: command had no output on stdout or stderr
# executed command: /home/b/sanitizer-x86_64-linux-fast/build/llvm_build_asan_ubsan/bin/FileCheck /home/b/sanitizer-x86_64-linux-fast/build/llvm-project/llvm/test/CodeGen/X86/memcmp-pgso.ll --check-prefixes=X64,X64-SSE2
# .---command stderr------------
# | /home/b/sanitizer-x86_64-linux-fast/build/llvm-project/llvm/test/CodeGen/X86/memcmp-pgso.ll:75:13: error: X64-NEXT: expected string not found in input
# | ; X64-NEXT: jne .LBB4_3
# |             ^
# | <stdin>:66:15: note: scanning from here
# |  cmpw %cx, %ax
# |               ^
# | <stdin>:67:2: note: possible intended match here
# |  jne .LBB4_1
# |  ^
# | /home/b/sanitizer-x86_64-linux-fast/build/llvm-project/llvm/test/CodeGen/X86/memcmp-pgso.ll:153:13: error: X64-NEXT: expected string not found in input
# | ; X64-NEXT: jne .LBB9_3
# |             ^
# | <stdin>:146:17: note: scanning from here
# |  cmpl %ecx, %eax
# |                 ^
# | <stdin>:147:2: note: possible intended match here
# |  jne .LBB9_1
# |  ^
# | /home/b/sanitizer-x86_64-linux-fast/build/llvm-project/llvm/test/CodeGen/X86/memcmp-pgso.ll:247:13: error: X64-NEXT: expected string not found in input
# | ; X64-NEXT: jne .LBB15_2
# |             ^
# | <stdin>:242:17: note: scanning from here
# |  cmpq %rdx, %rcx
# |                 ^
# | <stdin>:243:2: note: possible intended match here
# |  jne .LBB15_1
# |  ^
Step 10 (stage2/asan_ubsan check) failure: stage2/asan_ubsan check (failure)
...
llvm-lit: /home/b/sanitizer-x86_64-linux-fast/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:530: note: using lld-link: /home/b/sanitizer-x86_64-linux-fast/build/llvm_build_asan_ubsan/bin/lld-link
llvm-lit: /home/b/sanitizer-x86_64-linux-fast/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:530: note: using ld64.lld: /home/b/sanitizer-x86_64-linux-fast/build/llvm_build_asan_ubsan/bin/ld64.lld
llvm-lit: /home/b/sanitizer-x86_64-linux-fast/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:530: note: using wasm-ld: /home/b/sanitizer-x86_64-linux-fast/build/llvm_build_asan_ubsan/bin/wasm-ld
llvm-lit: /home/b/sanitizer-x86_64-linux-fast/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:530: note: using ld.lld: /home/b/sanitizer-x86_64-linux-fast/build/llvm_build_asan_ubsan/bin/ld.lld
llvm-lit: /home/b/sanitizer-x86_64-linux-fast/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:530: note: using lld-link: /home/b/sanitizer-x86_64-linux-fast/build/llvm_build_asan_ubsan/bin/lld-link
llvm-lit: /home/b/sanitizer-x86_64-linux-fast/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:530: note: using ld64.lld: /home/b/sanitizer-x86_64-linux-fast/build/llvm_build_asan_ubsan/bin/ld64.lld
llvm-lit: /home/b/sanitizer-x86_64-linux-fast/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:530: note: using wasm-ld: /home/b/sanitizer-x86_64-linux-fast/build/llvm_build_asan_ubsan/bin/wasm-ld
llvm-lit: /home/b/sanitizer-x86_64-linux-fast/build/llvm-project/llvm/utils/lit/lit/main.py:74: 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: 91977 tests, 64 workers --
Testing:  0.. 10.. 20.. 30.. 40.. 50.. 60
FAIL: LLVM :: CodeGen/X86/memcmp-pgso.ll (14081 of 91977)
******************** TEST 'LLVM :: CodeGen/X86/memcmp-pgso.ll' FAILED ********************
Exit Code: 1

Command Output (stdout):
--
# RUN: at line 2
/home/b/sanitizer-x86_64-linux-fast/build/llvm_build_asan_ubsan/bin/llc < /home/b/sanitizer-x86_64-linux-fast/build/llvm-project/llvm/test/CodeGen/X86/memcmp-pgso.ll -mtriple=x86_64-unknown-unknown | /home/b/sanitizer-x86_64-linux-fast/build/llvm_build_asan_ubsan/bin/FileCheck /home/b/sanitizer-x86_64-linux-fast/build/llvm-project/llvm/test/CodeGen/X86/memcmp-pgso.ll --check-prefixes=X64,X64-SSE2
# executed command: /home/b/sanitizer-x86_64-linux-fast/build/llvm_build_asan_ubsan/bin/llc -mtriple=x86_64-unknown-unknown
# note: command had no output on stdout or stderr
# executed command: /home/b/sanitizer-x86_64-linux-fast/build/llvm_build_asan_ubsan/bin/FileCheck /home/b/sanitizer-x86_64-linux-fast/build/llvm-project/llvm/test/CodeGen/X86/memcmp-pgso.ll --check-prefixes=X64,X64-SSE2
# .---command stderr------------
# | /home/b/sanitizer-x86_64-linux-fast/build/llvm-project/llvm/test/CodeGen/X86/memcmp-pgso.ll:75:13: error: X64-NEXT: expected string not found in input
# | ; X64-NEXT: jne .LBB4_3
# |             ^
# | <stdin>:66:15: note: scanning from here
# |  cmpw %cx, %ax
# |               ^
# | <stdin>:67:2: note: possible intended match here
# |  jne .LBB4_1
# |  ^
# | /home/b/sanitizer-x86_64-linux-fast/build/llvm-project/llvm/test/CodeGen/X86/memcmp-pgso.ll:153:13: error: X64-NEXT: expected string not found in input
# | ; X64-NEXT: jne .LBB9_3
# |             ^
# | <stdin>:146:17: note: scanning from here
# |  cmpl %ecx, %eax
# |                 ^
# | <stdin>:147:2: note: possible intended match here
# |  jne .LBB9_1
# |  ^
# | /home/b/sanitizer-x86_64-linux-fast/build/llvm-project/llvm/test/CodeGen/X86/memcmp-pgso.ll:247:13: error: X64-NEXT: expected string not found in input
# | ; X64-NEXT: jne .LBB15_2
# |             ^
# | <stdin>:242:17: note: scanning from here
# |  cmpq %rdx, %rcx
# |                 ^
# | <stdin>:243:2: note: possible intended match here
# |  jne .LBB15_1
# |  ^
Step 14 (stage2/msan check) failure: stage2/msan check (failure)
...
llvm-lit: /home/b/sanitizer-x86_64-linux-fast/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:530: note: using lld-link: /home/b/sanitizer-x86_64-linux-fast/build/llvm_build_msan/bin/lld-link
llvm-lit: /home/b/sanitizer-x86_64-linux-fast/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:530: note: using ld64.lld: /home/b/sanitizer-x86_64-linux-fast/build/llvm_build_msan/bin/ld64.lld
llvm-lit: /home/b/sanitizer-x86_64-linux-fast/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:530: note: using wasm-ld: /home/b/sanitizer-x86_64-linux-fast/build/llvm_build_msan/bin/wasm-ld
llvm-lit: /home/b/sanitizer-x86_64-linux-fast/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:530: note: using ld.lld: /home/b/sanitizer-x86_64-linux-fast/build/llvm_build_msan/bin/ld.lld
llvm-lit: /home/b/sanitizer-x86_64-linux-fast/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:530: note: using lld-link: /home/b/sanitizer-x86_64-linux-fast/build/llvm_build_msan/bin/lld-link
llvm-lit: /home/b/sanitizer-x86_64-linux-fast/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:530: note: using ld64.lld: /home/b/sanitizer-x86_64-linux-fast/build/llvm_build_msan/bin/ld64.lld
llvm-lit: /home/b/sanitizer-x86_64-linux-fast/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:530: note: using wasm-ld: /home/b/sanitizer-x86_64-linux-fast/build/llvm_build_msan/bin/wasm-ld
llvm-lit: /home/b/sanitizer-x86_64-linux-fast/build/llvm-project/llvm/utils/lit/lit/main.py:74: 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: 91976 tests, 64 workers --
Testing:  0.. 10.. 20.. 30.. 40.. 50.. 
FAIL: LLVM :: CodeGen/X86/memcmp-pgso.ll (5556 of 91976)
******************** TEST 'LLVM :: CodeGen/X86/memcmp-pgso.ll' FAILED ********************
Exit Code: 1

Command Output (stdout):
--
# RUN: at line 2
/home/b/sanitizer-x86_64-linux-fast/build/llvm_build_msan/bin/llc < /home/b/sanitizer-x86_64-linux-fast/build/llvm-project/llvm/test/CodeGen/X86/memcmp-pgso.ll -mtriple=x86_64-unknown-unknown | /home/b/sanitizer-x86_64-linux-fast/build/llvm_build_msan/bin/FileCheck /home/b/sanitizer-x86_64-linux-fast/build/llvm-project/llvm/test/CodeGen/X86/memcmp-pgso.ll --check-prefixes=X64,X64-SSE2
# executed command: /home/b/sanitizer-x86_64-linux-fast/build/llvm_build_msan/bin/llc -mtriple=x86_64-unknown-unknown
# note: command had no output on stdout or stderr
# executed command: /home/b/sanitizer-x86_64-linux-fast/build/llvm_build_msan/bin/FileCheck /home/b/sanitizer-x86_64-linux-fast/build/llvm-project/llvm/test/CodeGen/X86/memcmp-pgso.ll --check-prefixes=X64,X64-SSE2
# .---command stderr------------
# | /home/b/sanitizer-x86_64-linux-fast/build/llvm-project/llvm/test/CodeGen/X86/memcmp-pgso.ll:75:13: error: X64-NEXT: expected string not found in input
# | ; X64-NEXT: jne .LBB4_3
# |             ^
# | <stdin>:66:15: note: scanning from here
# |  cmpw %cx, %ax
# |               ^
# | <stdin>:67:2: note: possible intended match here
# |  jne .LBB4_1
# |  ^
# | /home/b/sanitizer-x86_64-linux-fast/build/llvm-project/llvm/test/CodeGen/X86/memcmp-pgso.ll:153:13: error: X64-NEXT: expected string not found in input
# | ; X64-NEXT: jne .LBB9_3
# |             ^
# | <stdin>:146:17: note: scanning from here
# |  cmpl %ecx, %eax
# |                 ^
# | <stdin>:147:2: note: possible intended match here
# |  jne .LBB9_1
# |  ^
# | /home/b/sanitizer-x86_64-linux-fast/build/llvm-project/llvm/test/CodeGen/X86/memcmp-pgso.ll:247:13: error: X64-NEXT: expected string not found in input
# | ; X64-NEXT: jne .LBB15_2
# |             ^
# | <stdin>:242:17: note: scanning from here
# |  cmpq %rdx, %rcx
# |                 ^
# | <stdin>:243:2: note: possible intended match here
# |  jne .LBB15_1
# |  ^

```

</details>

https://github.com/llvm/llvm-project/pull/158460