[llvm] [GlobalIsel] Add combine for select with constants (PR #121088)

Tue Dec 31 23:45:27 PST 2024

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `clang-s390x-linux-lnt` running on `systemz-1` while building `llvm` at step 7 "ninja check 1".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/136/builds/2211

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

```
Step 7 (ninja check 1) failure: stage 1 checked (failure)
******************** TEST 'libFuzzer-s390x-default-Linux :: fuzzer-timeout.test' FAILED ********************
Exit Code: 1

Command Output (stderr):
--
RUN: at line 1: /home/uweigand/sandbox/buildbot/clang-s390x-linux-lnt/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-lnt/llvm/compiler-rt/lib/fuzzer  /home/uweigand/sandbox/buildbot/clang-s390x-linux-lnt/llvm/compiler-rt/test/fuzzer/TimeoutTest.cpp -o /home/uweigand/sandbox/buildbot/clang-s390x-linux-lnt/stage1/runtimes/runtimes-bins/compiler-rt/test/fuzzer/S390XDefaultLinuxConfig/Output/fuzzer-timeout.test.tmp-TimeoutTest
+ /home/uweigand/sandbox/buildbot/clang-s390x-linux-lnt/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-lnt/llvm/compiler-rt/lib/fuzzer /home/uweigand/sandbox/buildbot/clang-s390x-linux-lnt/llvm/compiler-rt/test/fuzzer/TimeoutTest.cpp -o /home/uweigand/sandbox/buildbot/clang-s390x-linux-lnt/stage1/runtimes/runtimes-bins/compiler-rt/test/fuzzer/S390XDefaultLinuxConfig/Output/fuzzer-timeout.test.tmp-TimeoutTest
RUN: at line 2: /home/uweigand/sandbox/buildbot/clang-s390x-linux-lnt/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-lnt/llvm/compiler-rt/lib/fuzzer  /home/uweigand/sandbox/buildbot/clang-s390x-linux-lnt/llvm/compiler-rt/test/fuzzer/TimeoutEmptyTest.cpp -o /home/uweigand/sandbox/buildbot/clang-s390x-linux-lnt/stage1/runtimes/runtimes-bins/compiler-rt/test/fuzzer/S390XDefaultLinuxConfig/Output/fuzzer-timeout.test.tmp-TimeoutEmptyTest
+ /home/uweigand/sandbox/buildbot/clang-s390x-linux-lnt/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-lnt/llvm/compiler-rt/lib/fuzzer /home/uweigand/sandbox/buildbot/clang-s390x-linux-lnt/llvm/compiler-rt/test/fuzzer/TimeoutEmptyTest.cpp -o /home/uweigand/sandbox/buildbot/clang-s390x-linux-lnt/stage1/runtimes/runtimes-bins/compiler-rt/test/fuzzer/S390XDefaultLinuxConfig/Output/fuzzer-timeout.test.tmp-TimeoutEmptyTest
RUN: at line 3: not  /home/uweigand/sandbox/buildbot/clang-s390x-linux-lnt/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-lnt/llvm/compiler-rt/test/fuzzer/fuzzer-timeout.test --check-prefix=TimeoutTest
+ not /home/uweigand/sandbox/buildbot/clang-s390x-linux-lnt/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-lnt/llvm/compiler-rt/test/fuzzer/fuzzer-timeout.test --check-prefix=TimeoutTest
RUN: at line 12: not  /home/uweigand/sandbox/buildbot/clang-s390x-linux-lnt/stage1/runtimes/runtimes-bins/compiler-rt/test/fuzzer/S390XDefaultLinuxConfig/Output/fuzzer-timeout.test.tmp-TimeoutTest -timeout=1 /home/uweigand/sandbox/buildbot/clang-s390x-linux-lnt/llvm/compiler-rt/test/fuzzer/hi.txt 2>&1 | FileCheck /home/uweigand/sandbox/buildbot/clang-s390x-linux-lnt/llvm/compiler-rt/test/fuzzer/fuzzer-timeout.test --check-prefix=SingleInputTimeoutTest
+ not /home/uweigand/sandbox/buildbot/clang-s390x-linux-lnt/stage1/runtimes/runtimes-bins/compiler-rt/test/fuzzer/S390XDefaultLinuxConfig/Output/fuzzer-timeout.test.tmp-TimeoutTest -timeout=1 /home/uweigand/sandbox/buildbot/clang-s390x-linux-lnt/llvm/compiler-rt/test/fuzzer/hi.txt
+ FileCheck /home/uweigand/sandbox/buildbot/clang-s390x-linux-lnt/llvm/compiler-rt/test/fuzzer/fuzzer-timeout.test --check-prefix=SingleInputTimeoutTest
RUN: at line 16: /home/uweigand/sandbox/buildbot/clang-s390x-linux-lnt/stage1/runtimes/runtimes-bins/compiler-rt/test/fuzzer/S390XDefaultLinuxConfig/Output/fuzzer-timeout.test.tmp-TimeoutTest -timeout=1 -timeout_exitcode=0
+ /home/uweigand/sandbox/buildbot/clang-s390x-linux-lnt/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: 703330766
INFO: Loaded 1 modules   (13 inline 8-bit counters): 13 [0x2aa3594fe70, 0x2aa3594fe7d), 
INFO: Loaded 1 PC tables (13 PCs): 13 [0x2aa3594fe80,0x2aa3594ff50), 
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
#1237	NEW    cov: 3 ft: 3 corp: 2/15b lim: 14 exec/s: 0 rss: 32Mb L: 14/14 MS: 5 CrossOver-ChangeByte-InsertRepeatedBytes-CopyPart-ChangeByte-
#1239	REDUCE cov: 3 ft: 3 corp: 2/12b lim: 14 exec/s: 0 rss: 32Mb L: 11/11 MS: 2 CrossOver-EraseBytes-
#1297	REDUCE cov: 3 ft: 3 corp: 2/7b lim: 14 exec/s: 0 rss: 32Mb L: 6/6 MS: 3 CopyPart-InsertByte-CrossOver-
#1299	REDUCE cov: 3 ft: 3 corp: 2/4b lim: 14 exec/s: 0 rss: 32Mb L: 3/3 MS: 2 ChangeBit-EraseBytes-
#1345	REDUCE cov: 3 ft: 3 corp: 2/3b lim: 14 exec/s: 0 rss: 32Mb L: 2/2 MS: 1 EraseBytes-
#1476	REDUCE cov: 4 ft: 4 corp: 3/4b lim: 14 exec/s: 0 rss: 32Mb L: 1/2 MS: 1 EraseBytes-
#6102	NEW    cov: 5 ft: 5 corp: 4/6b lim: 58 exec/s: 0 rss: 32Mb L: 2/2 MS: 1 InsertByte-
#6138	NEW    cov: 6 ft: 6 corp: 5/49b lim: 58 exec/s: 0 rss: 32Mb L: 43/43 MS: 1 InsertRepeatedBytes-
#6194	REDUCE cov: 6 ft: 6 corp: 5/29b lim: 58 exec/s: 0 rss: 32Mb L: 23/23 MS: 1 EraseBytes-
#6363	REDUCE cov: 6 ft: 6 corp: 5/18b lim: 58 exec/s: 0 rss: 32Mb L: 12/12 MS: 4 ChangeBinInt-InsertByte-ChangeByte-EraseBytes-
#6524	REDUCE cov: 6 ft: 6 corp: 5/16b lim: 58 exec/s: 0 rss: 32Mb L: 10/10 MS: 1 EraseBytes-
#6740	REDUCE cov: 6 ft: 6 corp: 5/15b lim: 58 exec/s: 0 rss: 32Mb L: 9/9 MS: 1 EraseBytes-
#6783	REDUCE cov: 6 ft: 6 corp: 5/13b lim: 58 exec/s: 0 rss: 32Mb L: 7/7 MS: 3 ChangeByte-CrossOver-EraseBytes-
#6851	REDUCE cov: 6 ft: 6 corp: 5/11b lim: 58 exec/s: 0 rss: 32Mb L: 5/5 MS: 3 ChangeBit-ShuffleBytes-EraseBytes-
#6918	REDUCE cov: 6 ft: 6 corp: 5/9b lim: 58 exec/s: 0 rss: 32Mb L: 3/3 MS: 2 InsertByte-EraseBytes-
ALARM: working on the last Unit for 1 seconds
       and the timeout value is 1 (use -timeout=N to change)
MS: 2 ShuffleBytes-InsertByte-; base unit: 94dd9e08c129c785f7f256e82fbe0a30e6d1ae40
0x48,0x69,0x21,
Hi!
artifact_prefix='./'; Test unit written to ./timeout-c0a0ad26a634840c67a210fefdda76577b03a111
Base64: SGkh
==3279150== ERROR: libFuzzer: timeout after 1 seconds
AddressSanitizer:DEADLYSIGNAL
=================================================================
AddressSanitizer:DEADLYSIGNAL
...

```

</details>

https://github.com/llvm/llvm-project/pull/121088