[llvm] [ADT] Deprecate variadic `StringSwitch::Cases`. NFC. (PR #166066)

Sun Nov 2 11:59:27 PST 2025

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `clang-s390x-linux` running on `systemz-1` while building `llvm` at step 5 "ninja check 1".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/42/builds/6812

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

```
Step 5 (ninja check 1) failure: stage 1 checked (failure)
******************** TEST 'SanitizerCommon-asan-s390x-Linux :: Linux/soft_rss_limit_mb_test.cpp' FAILED ********************
Exit Code: 1

Command Output (stdout):
--
# RUN: at line 2
/home/uweigand/sandbox/buildbot/clang-s390x-linux/stage1/./bin/clang  --driver-mode=g++ -gline-tables-only -fsanitize=address  -funwind-tables  -I/home/uweigand/sandbox/buildbot/clang-s390x-linux/llvm/compiler-rt/test -ldl -O2 /home/uweigand/sandbox/buildbot/clang-s390x-linux/llvm/compiler-rt/test/sanitizer_common/TestCases/Linux/soft_rss_limit_mb_test.cpp -o /home/uweigand/sandbox/buildbot/clang-s390x-linux/stage1/runtimes/runtimes-bins/compiler-rt/test/sanitizer_common/asan-s390x-Linux/Linux/Output/soft_rss_limit_mb_test.cpp.tmp
# executed command: /home/uweigand/sandbox/buildbot/clang-s390x-linux/stage1/./bin/clang --driver-mode=g++ -gline-tables-only -fsanitize=address -funwind-tables -I/home/uweigand/sandbox/buildbot/clang-s390x-linux/llvm/compiler-rt/test -ldl -O2 /home/uweigand/sandbox/buildbot/clang-s390x-linux/llvm/compiler-rt/test/sanitizer_common/TestCases/Linux/soft_rss_limit_mb_test.cpp -o /home/uweigand/sandbox/buildbot/clang-s390x-linux/stage1/runtimes/runtimes-bins/compiler-rt/test/sanitizer_common/asan-s390x-Linux/Linux/Output/soft_rss_limit_mb_test.cpp.tmp
# RUN: at line 5
env ASAN_OPTIONS=soft_rss_limit_mb=220:quarantine_size=1:allocator_may_return_null=1      /home/uweigand/sandbox/buildbot/clang-s390x-linux/stage1/runtimes/runtimes-bins/compiler-rt/test/sanitizer_common/asan-s390x-Linux/Linux/Output/soft_rss_limit_mb_test.cpp.tmp 2>&1 | FileCheck /home/uweigand/sandbox/buildbot/clang-s390x-linux/llvm/compiler-rt/test/sanitizer_common/TestCases/Linux/soft_rss_limit_mb_test.cpp -check-prefix=CHECK_MAY_RETURN_1
# executed command: env ASAN_OPTIONS=soft_rss_limit_mb=220:quarantine_size=1:allocator_may_return_null=1 /home/uweigand/sandbox/buildbot/clang-s390x-linux/stage1/runtimes/runtimes-bins/compiler-rt/test/sanitizer_common/asan-s390x-Linux/Linux/Output/soft_rss_limit_mb_test.cpp.tmp
# executed command: FileCheck /home/uweigand/sandbox/buildbot/clang-s390x-linux/llvm/compiler-rt/test/sanitizer_common/TestCases/Linux/soft_rss_limit_mb_test.cpp -check-prefix=CHECK_MAY_RETURN_1
# RUN: at line 6
env ASAN_OPTIONS=soft_rss_limit_mb=220:quarantine_size=1:allocator_may_return_null=0 not  /home/uweigand/sandbox/buildbot/clang-s390x-linux/stage1/runtimes/runtimes-bins/compiler-rt/test/sanitizer_common/asan-s390x-Linux/Linux/Output/soft_rss_limit_mb_test.cpp.tmp 2>&1 | FileCheck /home/uweigand/sandbox/buildbot/clang-s390x-linux/llvm/compiler-rt/test/sanitizer_common/TestCases/Linux/soft_rss_limit_mb_test.cpp -check-prefix=CHECK_MAY_RETURN_0 --implicit-check-not="returned null"
# executed command: env ASAN_OPTIONS=soft_rss_limit_mb=220:quarantine_size=1:allocator_may_return_null=0 not /home/uweigand/sandbox/buildbot/clang-s390x-linux/stage1/runtimes/runtimes-bins/compiler-rt/test/sanitizer_common/asan-s390x-Linux/Linux/Output/soft_rss_limit_mb_test.cpp.tmp
# executed command: FileCheck /home/uweigand/sandbox/buildbot/clang-s390x-linux/llvm/compiler-rt/test/sanitizer_common/TestCases/Linux/soft_rss_limit_mb_test.cpp -check-prefix=CHECK_MAY_RETURN_0 '--implicit-check-not=returned null'
# RUN: at line 10
env ASAN_OPTIONS=soft_rss_limit_mb=220:quarantine_size=1:allocator_may_return_null=0:can_use_proc_maps_statm=0 not  /home/uweigand/sandbox/buildbot/clang-s390x-linux/stage1/runtimes/runtimes-bins/compiler-rt/test/sanitizer_common/asan-s390x-Linux/Linux/Output/soft_rss_limit_mb_test.cpp.tmp 2>&1 | FileCheck /home/uweigand/sandbox/buildbot/clang-s390x-linux/llvm/compiler-rt/test/sanitizer_common/TestCases/Linux/soft_rss_limit_mb_test.cpp -check-prefix=CHECK_MAY_RETURN_0 --implicit-check-not="returned null"
# executed command: env ASAN_OPTIONS=soft_rss_limit_mb=220:quarantine_size=1:allocator_may_return_null=0:can_use_proc_maps_statm=0 not /home/uweigand/sandbox/buildbot/clang-s390x-linux/stage1/runtimes/runtimes-bins/compiler-rt/test/sanitizer_common/asan-s390x-Linux/Linux/Output/soft_rss_limit_mb_test.cpp.tmp
# executed command: FileCheck /home/uweigand/sandbox/buildbot/clang-s390x-linux/llvm/compiler-rt/test/sanitizer_common/TestCases/Linux/soft_rss_limit_mb_test.cpp -check-prefix=CHECK_MAY_RETURN_0 '--implicit-check-not=returned null'
# .---command stderr------------
# | /home/uweigand/sandbox/buildbot/clang-s390x-linux/llvm/compiler-rt/test/sanitizer_common/TestCases/Linux/soft_rss_limit_mb_test.cpp:72:24: error: CHECK_MAY_RETURN_0: expected string not found in input
# | // CHECK_MAY_RETURN_0: Some of the malloc calls returned non-null:
# |                        ^
# | <stdin>:1:24: note: scanning from here
# | [0] allocating 32 times
# |                        ^
# | <stdin>:9:55: note: possible intended match here
# | ==2815256==HINT: if you don't care about these errors you may set allocator_may_return_null=1
# |                                                       ^
# | 
# | Input file: <stdin>
# | Check file: /home/uweigand/sandbox/buildbot/clang-s390x-linux/llvm/compiler-rt/test/sanitizer_common/TestCases/Linux/soft_rss_limit_mb_test.cpp
# | 
# | -dump-input=help explains the following input dump.
# | 
# | Input was:
# | <<<<<<
# |             1: [0] allocating 32 times 
# | check:72'0                            X error: no match found
# |             2: ==2815256==AddressSanitizer: soft rss limit exhausted (220Mb vs 420Mb) 
# | check:72'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# |             3:  [0] 
# | check:72'0     ~~~~~
# |             4: ================================================================= 
# | check:72'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# |             5: ==2815256==ERROR: AddressSanitizer: specified RSS limit exceeded, currently set to soft_rss_limit_mb=220 
# | check:72'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# |             6:  #0 0x02aa0506e37b in malloc /home/uweigand/sandbox/buildbot/clang-s390x-linux/llvm/compiler-rt/lib/asan/asan_malloc_linux.cpp:67:3 
# | check:72'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
...

```

</details>

https://github.com/llvm/llvm-project/pull/166066