[libcxx-commits] [libcxx] [libc++] Refactor std::equal to forward to the 3-leg overload if the size of the ranges is known (PR #171585)

Tue Dec 23 00:26:36 PST 2025

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `fuchsia-x86_64-linux` running on `fuchsia-debian-64-us-central1-b-1` while building `libcxx` at step 4 "annotate".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/11/builds/30452

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

```
Step 4 (annotate) failure: 'python ../llvm-zorg/zorg/buildbot/builders/annotated/fuchsia-linux.py ...' (failure)
...
[880/1482] Running the Clang regression tests
llvm-lit: /var/lib/buildbot/fuchsia-x86_64-linux/llvm-project/llvm/utils/lit/lit/llvm/config.py:564: note: using clang: /var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-crti8wpy/bin/clang
llvm-lit: /var/lib/buildbot/fuchsia-x86_64-linux/llvm-project/llvm/utils/lit/lit/llvm/subst.py:126: note: Did not find cir-opt in /var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-crti8wpy/bin:/var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-crti8wpy/bin
llvm-lit: /var/lib/buildbot/fuchsia-x86_64-linux/llvm-project/llvm/utils/lit/lit/llvm/subst.py:126: note: Did not find clang-repl in /var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-crti8wpy/bin:/var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-crti8wpy/bin
llvm-lit: /var/lib/buildbot/fuchsia-x86_64-linux/llvm-project/llvm/utils/lit/lit/llvm/config.py:564: note: using ld.lld: /var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-crti8wpy/bin/ld.lld
llvm-lit: /var/lib/buildbot/fuchsia-x86_64-linux/llvm-project/llvm/utils/lit/lit/llvm/config.py:564: note: using lld-link: /var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-crti8wpy/bin/lld-link
llvm-lit: /var/lib/buildbot/fuchsia-x86_64-linux/llvm-project/llvm/utils/lit/lit/llvm/config.py:564: note: using ld64.lld: /var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-crti8wpy/bin/ld64.lld
llvm-lit: /var/lib/buildbot/fuchsia-x86_64-linux/llvm-project/llvm/utils/lit/lit/llvm/config.py:564: note: using wasm-ld: /var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-crti8wpy/bin/wasm-ld
-- Testing: 23524 tests, 60 workers --
Testing:  0.. 10.. 20.. 30.. 40.. 50
FAIL: Clang :: Driver/darwin-ld.c (12743 of 23524)
******************** TEST 'Clang :: Driver/darwin-ld.c' FAILED ********************
Exit Code: 1

Command Output (stdout):
--
# RUN: at line 3
/var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-crti8wpy/bin/clang -target i386-apple-darwin9 -arch i386 -arch x86_64 /var/lib/buildbot/fuchsia-x86_64-linux/llvm-project/clang/test/Driver/darwin-ld.c -### -o foo 2> /var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-crti8wpy/tools/clang/test/Driver/Output/darwin-ld.c.tmp.log
# executed command: /var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-crti8wpy/bin/clang -target i386-apple-darwin9 -arch i386 -arch x86_64 /var/lib/buildbot/fuchsia-x86_64-linux/llvm-project/clang/test/Driver/darwin-ld.c '-###' -o foo
# RUN: at line 4
grep '".*ld.*" .*"-arch_multiple" "-final_output" "foo"' /var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-crti8wpy/tools/clang/test/Driver/Output/darwin-ld.c.tmp.log
# executed command: grep '".*ld.*" .*"-arch_multiple" "-final_output" "foo"' /var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-crti8wpy/tools/clang/test/Driver/Output/darwin-ld.c.tmp.log
# .---command stdout------------
# |  "/var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-crti8wpy/bin/ld64.lld" "-demangle" "-dynamic" "-arch" "i386" "-platform_version" "macos" "10.5.0" "10.5.0" "-mllvm" "-enable-linkonceodr-outlining" "-o" "/tmp/lit-tmp-584p3tzo/darwin-ld-ace943/darwin-ld-i386.out" "-lcrt1.10.5.o" "/tmp/lit-tmp-584p3tzo/darwin-ld-c43389/darwin-ld-i386.o" "-arch_multiple" "-final_output" "foo" "-lSystem" "-lgcc_s.1"
# |  "/var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-crti8wpy/bin/ld64.lld" "-demangle" "-dynamic" "-arch" "x86_64" "-platform_version" "macos" "10.5.0" "10.5.0" "-mllvm" "-enable-linkonceodr-outlining" "-o" "/tmp/lit-tmp-584p3tzo/darwin-ld-a53d78/darwin-ld-x86_64.out" "-lcrt1.10.5.o" "/tmp/lit-tmp-584p3tzo/darwin-ld-7342dd/darwin-ld-x86_64.o" "-arch_multiple" "-final_output" "foo" "-lSystem" "-lgcc_s.1"
# `-----------------------------
# RUN: at line 7
/var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-crti8wpy/bin/clang -target i386-apple-darwin9 -### -g /var/lib/buildbot/fuchsia-x86_64-linux/llvm-project/clang/test/Driver/darwin-ld.c -o BAR 2> /var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-crti8wpy/tools/clang/test/Driver/Output/darwin-ld.c.tmp.log
# executed command: /var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-crti8wpy/bin/clang -target i386-apple-darwin9 '-###' -g /var/lib/buildbot/fuchsia-x86_64-linux/llvm-project/clang/test/Driver/darwin-ld.c -o BAR
# RUN: at line 8
grep -E '".*dsymutil(\.exe)?" "-o" "BAR.dSYM" "BAR"' /var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-crti8wpy/tools/clang/test/Driver/Output/darwin-ld.c.tmp.log
# executed command: grep -E '".*dsymutil(\.exe)?" "-o" "BAR.dSYM" "BAR"' /var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-crti8wpy/tools/clang/test/Driver/Output/darwin-ld.c.tmp.log
# .---command stdout------------
# |  "/var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-crti8wpy/bin/dsymutil" "-o" "BAR.dSYM" "BAR"
# `-----------------------------
# RUN: at line 9
/var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-crti8wpy/bin/clang -target i386-apple-darwin9 -### -g -filelist FOO /var/lib/buildbot/fuchsia-x86_64-linux/llvm-project/clang/test/Driver/darwin-ld.c -o BAR 2> /var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-crti8wpy/tools/clang/test/Driver/Output/darwin-ld.c.tmp.log
# executed command: /var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-crti8wpy/bin/clang -target i386-apple-darwin9 '-###' -g -filelist FOO /var/lib/buildbot/fuchsia-x86_64-linux/llvm-project/clang/test/Driver/darwin-ld.c -o BAR
# RUN: at line 10
grep -E '".*dsymutil(\.exe)?" "-o" "BAR.dSYM" "BAR"' /var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-crti8wpy/tools/clang/test/Driver/Output/darwin-ld.c.tmp.log
# executed command: grep -E '".*dsymutil(\.exe)?" "-o" "BAR.dSYM" "BAR"' /var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-crti8wpy/tools/clang/test/Driver/Output/darwin-ld.c.tmp.log
# .---command stdout------------
# |  "/var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-crti8wpy/bin/dsymutil" "-o" "BAR.dSYM" "BAR"
# `-----------------------------
# RUN: at line 13
touch /var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-crti8wpy/tools/clang/test/Driver/Output/darwin-ld.c.tmp.o
# executed command: touch /var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-crti8wpy/tools/clang/test/Driver/Output/darwin-ld.c.tmp.o
# RUN: at line 14
/var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-crti8wpy/bin/clang -target i386-apple-darwin9 -fuse-ld= -mlinker-version=400 -### -arch armv6 -miphoneos-version-min=3.0 /var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-crti8wpy/tools/clang/test/Driver/Output/darwin-ld.c.tmp.o 2> /var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-crti8wpy/tools/clang/test/Driver/Output/darwin-ld.c.tmp.log
Step 7 (check) failure: check (failure)
...
[880/1482] Running the Clang regression tests
llvm-lit: /var/lib/buildbot/fuchsia-x86_64-linux/llvm-project/llvm/utils/lit/lit/llvm/config.py:564: note: using clang: /var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-crti8wpy/bin/clang
llvm-lit: /var/lib/buildbot/fuchsia-x86_64-linux/llvm-project/llvm/utils/lit/lit/llvm/subst.py:126: note: Did not find cir-opt in /var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-crti8wpy/bin:/var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-crti8wpy/bin
llvm-lit: /var/lib/buildbot/fuchsia-x86_64-linux/llvm-project/llvm/utils/lit/lit/llvm/subst.py:126: note: Did not find clang-repl in /var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-crti8wpy/bin:/var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-crti8wpy/bin
llvm-lit: /var/lib/buildbot/fuchsia-x86_64-linux/llvm-project/llvm/utils/lit/lit/llvm/config.py:564: note: using ld.lld: /var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-crti8wpy/bin/ld.lld
llvm-lit: /var/lib/buildbot/fuchsia-x86_64-linux/llvm-project/llvm/utils/lit/lit/llvm/config.py:564: note: using lld-link: /var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-crti8wpy/bin/lld-link
llvm-lit: /var/lib/buildbot/fuchsia-x86_64-linux/llvm-project/llvm/utils/lit/lit/llvm/config.py:564: note: using ld64.lld: /var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-crti8wpy/bin/ld64.lld
llvm-lit: /var/lib/buildbot/fuchsia-x86_64-linux/llvm-project/llvm/utils/lit/lit/llvm/config.py:564: note: using wasm-ld: /var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-crti8wpy/bin/wasm-ld
-- Testing: 23524 tests, 60 workers --
Testing:  0.. 10.. 20.. 30.. 40.. 50
FAIL: Clang :: Driver/darwin-ld.c (12743 of 23524)
******************** TEST 'Clang :: Driver/darwin-ld.c' FAILED ********************
Exit Code: 1

Command Output (stdout):
--
# RUN: at line 3
/var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-crti8wpy/bin/clang -target i386-apple-darwin9 -arch i386 -arch x86_64 /var/lib/buildbot/fuchsia-x86_64-linux/llvm-project/clang/test/Driver/darwin-ld.c -### -o foo 2> /var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-crti8wpy/tools/clang/test/Driver/Output/darwin-ld.c.tmp.log
# executed command: /var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-crti8wpy/bin/clang -target i386-apple-darwin9 -arch i386 -arch x86_64 /var/lib/buildbot/fuchsia-x86_64-linux/llvm-project/clang/test/Driver/darwin-ld.c '-###' -o foo
# RUN: at line 4
grep '".*ld.*" .*"-arch_multiple" "-final_output" "foo"' /var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-crti8wpy/tools/clang/test/Driver/Output/darwin-ld.c.tmp.log
# executed command: grep '".*ld.*" .*"-arch_multiple" "-final_output" "foo"' /var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-crti8wpy/tools/clang/test/Driver/Output/darwin-ld.c.tmp.log
# .---command stdout------------
# |  "/var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-crti8wpy/bin/ld64.lld" "-demangle" "-dynamic" "-arch" "i386" "-platform_version" "macos" "10.5.0" "10.5.0" "-mllvm" "-enable-linkonceodr-outlining" "-o" "/tmp/lit-tmp-584p3tzo/darwin-ld-ace943/darwin-ld-i386.out" "-lcrt1.10.5.o" "/tmp/lit-tmp-584p3tzo/darwin-ld-c43389/darwin-ld-i386.o" "-arch_multiple" "-final_output" "foo" "-lSystem" "-lgcc_s.1"
# |  "/var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-crti8wpy/bin/ld64.lld" "-demangle" "-dynamic" "-arch" "x86_64" "-platform_version" "macos" "10.5.0" "10.5.0" "-mllvm" "-enable-linkonceodr-outlining" "-o" "/tmp/lit-tmp-584p3tzo/darwin-ld-a53d78/darwin-ld-x86_64.out" "-lcrt1.10.5.o" "/tmp/lit-tmp-584p3tzo/darwin-ld-7342dd/darwin-ld-x86_64.o" "-arch_multiple" "-final_output" "foo" "-lSystem" "-lgcc_s.1"
# `-----------------------------
# RUN: at line 7
/var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-crti8wpy/bin/clang -target i386-apple-darwin9 -### -g /var/lib/buildbot/fuchsia-x86_64-linux/llvm-project/clang/test/Driver/darwin-ld.c -o BAR 2> /var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-crti8wpy/tools/clang/test/Driver/Output/darwin-ld.c.tmp.log
# executed command: /var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-crti8wpy/bin/clang -target i386-apple-darwin9 '-###' -g /var/lib/buildbot/fuchsia-x86_64-linux/llvm-project/clang/test/Driver/darwin-ld.c -o BAR
# RUN: at line 8
grep -E '".*dsymutil(\.exe)?" "-o" "BAR.dSYM" "BAR"' /var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-crti8wpy/tools/clang/test/Driver/Output/darwin-ld.c.tmp.log
# executed command: grep -E '".*dsymutil(\.exe)?" "-o" "BAR.dSYM" "BAR"' /var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-crti8wpy/tools/clang/test/Driver/Output/darwin-ld.c.tmp.log
# .---command stdout------------
# |  "/var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-crti8wpy/bin/dsymutil" "-o" "BAR.dSYM" "BAR"
# `-----------------------------
# RUN: at line 9
/var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-crti8wpy/bin/clang -target i386-apple-darwin9 -### -g -filelist FOO /var/lib/buildbot/fuchsia-x86_64-linux/llvm-project/clang/test/Driver/darwin-ld.c -o BAR 2> /var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-crti8wpy/tools/clang/test/Driver/Output/darwin-ld.c.tmp.log
# executed command: /var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-crti8wpy/bin/clang -target i386-apple-darwin9 '-###' -g -filelist FOO /var/lib/buildbot/fuchsia-x86_64-linux/llvm-project/clang/test/Driver/darwin-ld.c -o BAR
# RUN: at line 10
grep -E '".*dsymutil(\.exe)?" "-o" "BAR.dSYM" "BAR"' /var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-crti8wpy/tools/clang/test/Driver/Output/darwin-ld.c.tmp.log
# executed command: grep -E '".*dsymutil(\.exe)?" "-o" "BAR.dSYM" "BAR"' /var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-crti8wpy/tools/clang/test/Driver/Output/darwin-ld.c.tmp.log
# .---command stdout------------
# |  "/var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-crti8wpy/bin/dsymutil" "-o" "BAR.dSYM" "BAR"
# `-----------------------------
# RUN: at line 13
touch /var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-crti8wpy/tools/clang/test/Driver/Output/darwin-ld.c.tmp.o
# executed command: touch /var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-crti8wpy/tools/clang/test/Driver/Output/darwin-ld.c.tmp.o
# RUN: at line 14
/var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-crti8wpy/bin/clang -target i386-apple-darwin9 -fuse-ld= -mlinker-version=400 -### -arch armv6 -miphoneos-version-min=3.0 /var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-crti8wpy/tools/clang/test/Driver/Output/darwin-ld.c.tmp.o 2> /var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-crti8wpy/tools/clang/test/Driver/Output/darwin-ld.c.tmp.log

```

</details>

https://github.com/llvm/llvm-project/pull/171585