[clang] [CIR] Add cir-simplify pass (PR #138317)

Wed May 7 15:09:19 PDT 2025

llvm-ci wrote:

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

Full details are available at: https://lab.llvm.org/buildbot/#/builders/42/builds/4456

<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 'libFuzzer-s390x-default-Linux :: fuzzer-timeout.test' FAILED ********************
Exit Code: 1

Command Output (stderr):
--
/home/uweigand/sandbox/buildbot/clang-s390x-linux/stage1/./bin/clang    -Wthread-safety -Wthread-safety-reference -Wthread-safety-beta   --driver-mode=g++ -O2 -gline-tables-only -fsanitize=address,fuzzer -I/home/uweigand/sandbox/buildbot/clang-s390x-linux/llvm/compiler-rt/lib/fuzzer  /home/uweigand/sandbox/buildbot/clang-s390x-linux/llvm/compiler-rt/test/fuzzer/TimeoutTest.cpp -o /home/uweigand/sandbox/buildbot/clang-s390x-linux/stage1/runtimes/runtimes-bins/compiler-rt/test/fuzzer/S390XDefaultLinuxConfig/Output/fuzzer-timeout.test.tmp-TimeoutTest # RUN: at line 1
+ /home/uweigand/sandbox/buildbot/clang-s390x-linux/stage1/./bin/clang -Wthread-safety -Wthread-safety-reference -Wthread-safety-beta --driver-mode=g++ -O2 -gline-tables-only -fsanitize=address,fuzzer -I/home/uweigand/sandbox/buildbot/clang-s390x-linux/llvm/compiler-rt/lib/fuzzer /home/uweigand/sandbox/buildbot/clang-s390x-linux/llvm/compiler-rt/test/fuzzer/TimeoutTest.cpp -o /home/uweigand/sandbox/buildbot/clang-s390x-linux/stage1/runtimes/runtimes-bins/compiler-rt/test/fuzzer/S390XDefaultLinuxConfig/Output/fuzzer-timeout.test.tmp-TimeoutTest
/home/uweigand/sandbox/buildbot/clang-s390x-linux/stage1/./bin/clang    -Wthread-safety -Wthread-safety-reference -Wthread-safety-beta   --driver-mode=g++ -O2 -gline-tables-only -fsanitize=address,fuzzer -I/home/uweigand/sandbox/buildbot/clang-s390x-linux/llvm/compiler-rt/lib/fuzzer  /home/uweigand/sandbox/buildbot/clang-s390x-linux/llvm/compiler-rt/test/fuzzer/TimeoutEmptyTest.cpp -o /home/uweigand/sandbox/buildbot/clang-s390x-linux/stage1/runtimes/runtimes-bins/compiler-rt/test/fuzzer/S390XDefaultLinuxConfig/Output/fuzzer-timeout.test.tmp-TimeoutEmptyTest # RUN: at line 2
+ /home/uweigand/sandbox/buildbot/clang-s390x-linux/stage1/./bin/clang -Wthread-safety -Wthread-safety-reference -Wthread-safety-beta --driver-mode=g++ -O2 -gline-tables-only -fsanitize=address,fuzzer -I/home/uweigand/sandbox/buildbot/clang-s390x-linux/llvm/compiler-rt/lib/fuzzer /home/uweigand/sandbox/buildbot/clang-s390x-linux/llvm/compiler-rt/test/fuzzer/TimeoutEmptyTest.cpp -o /home/uweigand/sandbox/buildbot/clang-s390x-linux/stage1/runtimes/runtimes-bins/compiler-rt/test/fuzzer/S390XDefaultLinuxConfig/Output/fuzzer-timeout.test.tmp-TimeoutEmptyTest
not  /home/uweigand/sandbox/buildbot/clang-s390x-linux/stage1/runtimes/runtimes-bins/compiler-rt/test/fuzzer/S390XDefaultLinuxConfig/Output/fuzzer-timeout.test.tmp-TimeoutTest -timeout=1 2>&1 | FileCheck /home/uweigand/sandbox/buildbot/clang-s390x-linux/llvm/compiler-rt/test/fuzzer/fuzzer-timeout.test --check-prefix=TimeoutTest # RUN: at line 3
+ not /home/uweigand/sandbox/buildbot/clang-s390x-linux/stage1/runtimes/runtimes-bins/compiler-rt/test/fuzzer/S390XDefaultLinuxConfig/Output/fuzzer-timeout.test.tmp-TimeoutTest -timeout=1
+ FileCheck /home/uweigand/sandbox/buildbot/clang-s390x-linux/llvm/compiler-rt/test/fuzzer/fuzzer-timeout.test --check-prefix=TimeoutTest
not  /home/uweigand/sandbox/buildbot/clang-s390x-linux/stage1/runtimes/runtimes-bins/compiler-rt/test/fuzzer/S390XDefaultLinuxConfig/Output/fuzzer-timeout.test.tmp-TimeoutTest -timeout=1 /home/uweigand/sandbox/buildbot/clang-s390x-linux/llvm/compiler-rt/test/fuzzer/hi.txt 2>&1 | FileCheck /home/uweigand/sandbox/buildbot/clang-s390x-linux/llvm/compiler-rt/test/fuzzer/fuzzer-timeout.test --check-prefix=SingleInputTimeoutTest # RUN: at line 12
+ not /home/uweigand/sandbox/buildbot/clang-s390x-linux/stage1/runtimes/runtimes-bins/compiler-rt/test/fuzzer/S390XDefaultLinuxConfig/Output/fuzzer-timeout.test.tmp-TimeoutTest -timeout=1 /home/uweigand/sandbox/buildbot/clang-s390x-linux/llvm/compiler-rt/test/fuzzer/hi.txt
+ FileCheck /home/uweigand/sandbox/buildbot/clang-s390x-linux/llvm/compiler-rt/test/fuzzer/fuzzer-timeout.test --check-prefix=SingleInputTimeoutTest
/home/uweigand/sandbox/buildbot/clang-s390x-linux/stage1/runtimes/runtimes-bins/compiler-rt/test/fuzzer/S390XDefaultLinuxConfig/Output/fuzzer-timeout.test.tmp-TimeoutTest -timeout=1 -timeout_exitcode=0 # RUN: at line 16
+ /home/uweigand/sandbox/buildbot/clang-s390x-linux/stage1/runtimes/runtimes-bins/compiler-rt/test/fuzzer/S390XDefaultLinuxConfig/Output/fuzzer-timeout.test.tmp-TimeoutTest -timeout=1 -timeout_exitcode=0
INFO: Running with entropic power schedule (0xFF, 100).
INFO: Seed: 560534777
INFO: Loaded 1 modules   (13 inline 8-bit counters): 13 [0x2aa055d1e80, 0x2aa055d1e8d), 
INFO: Loaded 1 PC tables (13 PCs): 13 [0x2aa055d1e90,0x2aa055d1f60), 
INFO: -max_len is not provided; libFuzzer will not generate inputs larger than 4096 bytes
INFO: A corpus is not provided, starting from an empty corpus
#2	INITED cov: 2 ft: 2 corp: 1/1b exec/s: 0 rss: 31Mb
#473	NEW    cov: 3 ft: 3 corp: 2/3b lim: 8 exec/s: 0 rss: 31Mb L: 2/2 MS: 1 InsertByte-
#577	NEW    cov: 4 ft: 4 corp: 3/4b lim: 8 exec/s: 0 rss: 32Mb L: 1/2 MS: 4 ChangeByte-CrossOver-EraseBytes-EraseBytes-
#2518	NEW    cov: 5 ft: 5 corp: 4/28b lim: 25 exec/s: 0 rss: 32Mb L: 24/24 MS: 1 InsertRepeatedBytes-
#2556	REDUCE cov: 5 ft: 5 corp: 4/24b lim: 25 exec/s: 0 rss: 32Mb L: 20/20 MS: 3 CrossOver-ChangeBit-EraseBytes-
#2590	REDUCE cov: 5 ft: 5 corp: 4/20b lim: 25 exec/s: 0 rss: 32Mb L: 16/16 MS: 4 InsertRepeatedBytes-ChangeBinInt-ShuffleBytes-EraseBytes-
#2602	REDUCE cov: 5 ft: 5 corp: 4/16b lim: 25 exec/s: 0 rss: 32Mb L: 12/12 MS: 2 CrossOver-EraseBytes-
#2674	REDUCE cov: 5 ft: 5 corp: 4/11b lim: 25 exec/s: 0 rss: 32Mb L: 7/7 MS: 2 ShuffleBytes-EraseBytes-
#2702	REDUCE cov: 5 ft: 5 corp: 4/10b lim: 25 exec/s: 0 rss: 32Mb L: 6/6 MS: 3 InsertByte-ChangeBinInt-EraseBytes-
#2774	REDUCE cov: 5 ft: 5 corp: 4/9b lim: 25 exec/s: 0 rss: 32Mb L: 5/5 MS: 2 CopyPart-EraseBytes-
#2780	REDUCE cov: 5 ft: 5 corp: 4/8b lim: 25 exec/s: 0 rss: 32Mb L: 4/4 MS: 1 EraseBytes-
#2822	NEW    cov: 6 ft: 6 corp: 5/10b lim: 25 exec/s: 0 rss: 32Mb L: 2/4 MS: 2 InsertByte-CrossOver-
#3564	REDUCE cov: 6 ft: 6 corp: 5/9b lim: 29 exec/s: 0 rss: 32Mb L: 3/3 MS: 2 ChangeBit-EraseBytes-
ALARM: working on the last Unit for 1 seconds
       and the timeout value is 1 (use -timeout=N to change)
MS: 2 CrossOver-ChangeByte-; base unit: 94dd9e08c129c785f7f256e82fbe0a30e6d1ae40
0x48,0x69,0x21,0xa,
Hi!\012
artifact_prefix='./'; Test unit written to ./timeout-eb8e0e5fcbd4675e9e6fc6f770a170e56bd5923b
Base64: SGkhCg==
==1738396== ERROR: libFuzzer: timeout after 1 seconds
/home/uweigand/sandbox/buildbot/clang-s390x-linux/stage1/./bin/llvm-symbolizer: error: 'linux-vdso64.so.1': No such file or directory
    #0 0x02aa0554aed5 in __sanitizer_print_stack_trace /home/uweigand/sandbox/buildbot/clang-s390x-linux/llvm/compiler-rt/lib/asan/asan_stack.cpp:87:3
    #1 0x02aa05478917 in fuzzer::PrintStackTrace() /home/uweigand/sandbox/buildbot/clang-s390x-linux/llvm/compiler-rt/lib/fuzzer/FuzzerUtil.cpp:210:5
    #2 0x02aa054538bb in fuzzer::Fuzzer::AlarmCallback() /home/uweigand/sandbox/buildbot/clang-s390x-linux/llvm/compiler-rt/lib/fuzzer/FuzzerLoop.cpp:304:5
    #3 0x03ff9997e47f  (linux-vdso64.so.1+0x47f) (BuildId: 0795548b1e9da1e16113054b6f44a2514f6a452e)
    #4 0x02aa05476301 in Popcountll /home/uweigand/sandbox/buildbot/clang-s390x-linux/llvm/compiler-rt/lib/fuzzer/FuzzerBuiltins.h:29:54
...

```

</details>

https://github.com/llvm/llvm-project/pull/138317