[llvm] [Exegesis][RISCV] Add RISCV support for llvm-exegesis (PR #89047)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `sanitizer-x86_64-linux` running on `sanitizer-buildbot2` while building `llvm` at step 2 "annotate".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/66/builds/7702

<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)
...
[4696/5363] Linking CXX static library lib/libLLVMX86AsmParser.a
[4697/5363] Linking CXX static library lib/libLLVMX86TargetMCA.a
[4698/5363] Building RISCVGenGlobalISel.inc...
[4699/5363] Building AMDGPUGenDisassemblerTables.inc...
[4700/5363] Building AMDGPUGenSubtargetInfo.inc...
[4701/5363] Building CXX object tools/llvm-exegesis/lib/CMakeFiles/LLVMExegesis.dir/Analysis.cpp.o
[4702/5363] Building CXX object tools/llvm-exegesis/lib/CMakeFiles/LLVMExegesis.dir/Clustering.cpp.o
[4703/5363] Building AMDGPUGenMCCodeEmitter.inc...
[4704/5363] Building AMDGPUGenSearchableTables.inc...
[4705/5363] Building CXX object tools/llvm-exegesis/lib/CMakeFiles/LLVMExegesis.dir/SerialSnippetGenerator.cpp.o
FAILED: tools/llvm-exegesis/lib/CMakeFiles/LLVMExegesis.dir/SerialSnippetGenerator.cpp.o 
CCACHE_CPP2=yes CCACHE_HASHDIR=yes /usr/bin/ccache /home/b/sanitizer-x86_64-linux/build/llvm_build0/bin/clang++ -DGTEST_HAS_RTTI=0 -DLLVM_BUILD_STATIC -D_DEBUG -D_GLIBCXX_ASSERTIONS -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I/home/b/sanitizer-x86_64-linux/build/build_default/tools/llvm-exegesis/lib -I/home/b/sanitizer-x86_64-linux/build/llvm-project/llvm/tools/llvm-exegesis/lib -I/home/b/sanitizer-x86_64-linux/build/build_default/include -I/home/b/sanitizer-x86_64-linux/build/llvm-project/llvm/include -fPIC -fno-semantic-interposition -fvisibility-inlines-hidden -Werror -Werror=date-time -Werror=unguarded-availability-new -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wmissing-field-initializers -pedantic -Wno-long-long -Wc++98-compat-extra-semi -Wimplicit-fallthrough -Wcovered-switch-default -Wno-noexcept-type -Wnon-virtual-dtor -Wdelete-non-virtual-dtor -Wsuggest-override -Wstring-conversion -Wmisleading-indentation -Wctad-maybe-unsupported -fdiagnostics-color -ffunction-sections -fdata-sections -O3 -DNDEBUG -std=c++17  -fno-exceptions -funwind-tables -fno-rtti -UNDEBUG -MD -MT tools/llvm-exegesis/lib/CMakeFiles/LLVMExegesis.dir/SerialSnippetGenerator.cpp.o -MF tools/llvm-exegesis/lib/CMakeFiles/LLVMExegesis.dir/SerialSnippetGenerator.cpp.o.d -o tools/llvm-exegesis/lib/CMakeFiles/LLVMExegesis.dir/SerialSnippetGenerator.cpp.o -c /home/b/sanitizer-x86_64-linux/build/llvm-project/llvm/tools/llvm-exegesis/lib/SerialSnippetGenerator.cpp
/home/b/sanitizer-x86_64-linux/build/llvm-project/llvm/tools/llvm-exegesis/lib/SerialSnippetGenerator.cpp:56:24: error: unused variable 'OtherInstrDesc' [-Werror,-Wunused-variable]
   56 |     const MCInstrDesc &OtherInstrDesc = OtherInstr.Description;
      |                        ^~~~~~~~~~~~~~
1 error generated.
[4706/5363] Building CXX object tools/llvm-exegesis/lib/CMakeFiles/LLVMExegesis.dir/SnippetFile.cpp.o
FAILED: tools/llvm-exegesis/lib/CMakeFiles/LLVMExegesis.dir/SnippetFile.cpp.o 
CCACHE_CPP2=yes CCACHE_HASHDIR=yes /usr/bin/ccache /home/b/sanitizer-x86_64-linux/build/llvm_build0/bin/clang++ -DGTEST_HAS_RTTI=0 -DLLVM_BUILD_STATIC -D_DEBUG -D_GLIBCXX_ASSERTIONS -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I/home/b/sanitizer-x86_64-linux/build/build_default/tools/llvm-exegesis/lib -I/home/b/sanitizer-x86_64-linux/build/llvm-project/llvm/tools/llvm-exegesis/lib -I/home/b/sanitizer-x86_64-linux/build/build_default/include -I/home/b/sanitizer-x86_64-linux/build/llvm-project/llvm/include -fPIC -fno-semantic-interposition -fvisibility-inlines-hidden -Werror -Werror=date-time -Werror=unguarded-availability-new -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wmissing-field-initializers -pedantic -Wno-long-long -Wc++98-compat-extra-semi -Wimplicit-fallthrough -Wcovered-switch-default -Wno-noexcept-type -Wnon-virtual-dtor -Wdelete-non-virtual-dtor -Wsuggest-override -Wstring-conversion -Wmisleading-indentation -Wctad-maybe-unsupported -fdiagnostics-color -ffunction-sections -fdata-sections -O3 -DNDEBUG -std=c++17  -fno-exceptions -funwind-tables -fno-rtti -UNDEBUG -MD -MT tools/llvm-exegesis/lib/CMakeFiles/LLVMExegesis.dir/SnippetFile.cpp.o -MF tools/llvm-exegesis/lib/CMakeFiles/LLVMExegesis.dir/SnippetFile.cpp.o.d -o tools/llvm-exegesis/lib/CMakeFiles/LLVMExegesis.dir/SnippetFile.cpp.o -c /home/b/sanitizer-x86_64-linux/build/llvm-project/llvm/tools/llvm-exegesis/lib/SnippetFile.cpp
/home/b/sanitizer-x86_64-linux/build/llvm-project/llvm/tools/llvm-exegesis/lib/SnippetFile.cpp:221:25: error: private field 'Target' is not used [-Werror,-Wunused-private-field]
  221 |   const ExegesisTarget &Target;
      |                         ^
1 error generated.
[4707/5363] Building RISCVGenDAGISel.inc...
[4708/5363] Building CXX object tools/llvm-exegesis/lib/CMakeFiles/LLVMExegesis.dir/LlvmState.cpp.o
[4709/5363] Building CXX object tools/llvm-exegesis/lib/CMakeFiles/LLVMExegesis.dir/ParallelSnippetGenerator.cpp.o
[4710/5363] Building CXX object tools/llvm-exegesis/lib/CMakeFiles/LLVMExegesis.dir/SnippetGenerator.cpp.o
[4711/5363] Building CXX object tools/llvm-exegesis/lib/CMakeFiles/LLVMExegesis.dir/UopsBenchmarkRunner.cpp.o
[4712/5363] Building CXX object tools/llvm-exegesis/lib/PowerPC/CMakeFiles/LLVMExegesisPowerPC.dir/Target.cpp.o
[4713/5363] Building CXX object tools/llvm-exegesis/lib/Mips/CMakeFiles/LLVMExegesisMips.dir/Target.cpp.o
[4714/5363] Building CXX object tools/llvm-exegesis/lib/AArch64/CMakeFiles/LLVMExegesisAArch64.dir/Target.cpp.o
[4715/5363] Building CXX object tools/llvm-exegesis/lib/CMakeFiles/LLVMExegesis.dir/BenchmarkResult.cpp.o
[4716/5363] Building CXX object tools/llvm-exegesis/lib/CMakeFiles/LLVMExegesis.dir/LatencyBenchmarkRunner.cpp.o
[4717/5363] Building CXX object tools/llvm-exegesis/lib/CMakeFiles/LLVMExegesis.dir/SnippetRepetitor.cpp.o
[4718/5363] Building CXX object tools/llvm-exegesis/lib/CMakeFiles/LLVMExegesis.dir/Target.cpp.o
[4719/5363] Building CXX object tools/llvm-exegesis/lib/CMakeFiles/LLVMExegesis.dir/Assembler.cpp.o
[4720/5363] Building CXX object tools/llvm-exegesis/lib/CMakeFiles/LLVMExegesis.dir/BenchmarkRunner.cpp.o
[4721/5363] Building CXX object lib/Target/ARM/CMakeFiles/LLVMARMCodeGen.dir/ARMInstructionSelector.cpp.o
[4722/5363] Building CXX object lib/Target/PowerPC/CMakeFiles/LLVMPowerPCCodeGen.dir/GISel/PPCInstructionSelector.cpp.o
[4723/5363] Building AMDGPUGenAsmWriter.inc...
[4724/5363] Building AMDGPUGenGlobalISel.inc...
[4725/5363] Building AMDGPUGenDAGISel.inc...
[4726/5363] Building CXX object tools/llvm-exegesis/lib/X86/CMakeFiles/LLVMExegesisX86.dir/Target.cpp.o
[4727/5363] Building AMDGPUGenAsmMatcher.inc...
[4728/5363] Building AMDGPUGenInstrInfo.inc...
[4729/5363] Building AMDGPUGenRegisterBank.inc...
[4730/5363] Building CXX object lib/Target/AArch64/CMakeFiles/LLVMAArch64CodeGen.dir/GISel/AArch64InstructionSelector.cpp.o
[4731/5363] Building RISCVGenSubtargetInfo.inc...
[4732/5363] Building AMDGPUGenRegisterInfo.inc...
Step 8 (build compiler-rt symbolizer) failure: build compiler-rt symbolizer (failure)
...
[4696/5363] Linking CXX static library lib/libLLVMX86AsmParser.a
[4697/5363] Linking CXX static library lib/libLLVMX86TargetMCA.a
[4698/5363] Building RISCVGenGlobalISel.inc...
[4699/5363] Building AMDGPUGenDisassemblerTables.inc...
[4700/5363] Building AMDGPUGenSubtargetInfo.inc...
[4701/5363] Building CXX object tools/llvm-exegesis/lib/CMakeFiles/LLVMExegesis.dir/Analysis.cpp.o
[4702/5363] Building CXX object tools/llvm-exegesis/lib/CMakeFiles/LLVMExegesis.dir/Clustering.cpp.o
[4703/5363] Building AMDGPUGenMCCodeEmitter.inc...
[4704/5363] Building AMDGPUGenSearchableTables.inc...
[4705/5363] Building CXX object tools/llvm-exegesis/lib/CMakeFiles/LLVMExegesis.dir/SerialSnippetGenerator.cpp.o
FAILED: tools/llvm-exegesis/lib/CMakeFiles/LLVMExegesis.dir/SerialSnippetGenerator.cpp.o 
CCACHE_CPP2=yes CCACHE_HASHDIR=yes /usr/bin/ccache /home/b/sanitizer-x86_64-linux/build/llvm_build0/bin/clang++ -DGTEST_HAS_RTTI=0 -DLLVM_BUILD_STATIC -D_DEBUG -D_GLIBCXX_ASSERTIONS -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I/home/b/sanitizer-x86_64-linux/build/build_default/tools/llvm-exegesis/lib -I/home/b/sanitizer-x86_64-linux/build/llvm-project/llvm/tools/llvm-exegesis/lib -I/home/b/sanitizer-x86_64-linux/build/build_default/include -I/home/b/sanitizer-x86_64-linux/build/llvm-project/llvm/include -fPIC -fno-semantic-interposition -fvisibility-inlines-hidden -Werror -Werror=date-time -Werror=unguarded-availability-new -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wmissing-field-initializers -pedantic -Wno-long-long -Wc++98-compat-extra-semi -Wimplicit-fallthrough -Wcovered-switch-default -Wno-noexcept-type -Wnon-virtual-dtor -Wdelete-non-virtual-dtor -Wsuggest-override -Wstring-conversion -Wmisleading-indentation -Wctad-maybe-unsupported -fdiagnostics-color -ffunction-sections -fdata-sections -O3 -DNDEBUG -std=c++17  -fno-exceptions -funwind-tables -fno-rtti -UNDEBUG -MD -MT tools/llvm-exegesis/lib/CMakeFiles/LLVMExegesis.dir/SerialSnippetGenerator.cpp.o -MF tools/llvm-exegesis/lib/CMakeFiles/LLVMExegesis.dir/SerialSnippetGenerator.cpp.o.d -o tools/llvm-exegesis/lib/CMakeFiles/LLVMExegesis.dir/SerialSnippetGenerator.cpp.o -c /home/b/sanitizer-x86_64-linux/build/llvm-project/llvm/tools/llvm-exegesis/lib/SerialSnippetGenerator.cpp
/home/b/sanitizer-x86_64-linux/build/llvm-project/llvm/tools/llvm-exegesis/lib/SerialSnippetGenerator.cpp:56:24: error: unused variable 'OtherInstrDesc' [-Werror,-Wunused-variable]
   56 |     const MCInstrDesc &OtherInstrDesc = OtherInstr.Description;
      |                        ^~~~~~~~~~~~~~
1 error generated.
[4706/5363] Building CXX object tools/llvm-exegesis/lib/CMakeFiles/LLVMExegesis.dir/SnippetFile.cpp.o
FAILED: tools/llvm-exegesis/lib/CMakeFiles/LLVMExegesis.dir/SnippetFile.cpp.o 
CCACHE_CPP2=yes CCACHE_HASHDIR=yes /usr/bin/ccache /home/b/sanitizer-x86_64-linux/build/llvm_build0/bin/clang++ -DGTEST_HAS_RTTI=0 -DLLVM_BUILD_STATIC -D_DEBUG -D_GLIBCXX_ASSERTIONS -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I/home/b/sanitizer-x86_64-linux/build/build_default/tools/llvm-exegesis/lib -I/home/b/sanitizer-x86_64-linux/build/llvm-project/llvm/tools/llvm-exegesis/lib -I/home/b/sanitizer-x86_64-linux/build/build_default/include -I/home/b/sanitizer-x86_64-linux/build/llvm-project/llvm/include -fPIC -fno-semantic-interposition -fvisibility-inlines-hidden -Werror -Werror=date-time -Werror=unguarded-availability-new -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wmissing-field-initializers -pedantic -Wno-long-long -Wc++98-compat-extra-semi -Wimplicit-fallthrough -Wcovered-switch-default -Wno-noexcept-type -Wnon-virtual-dtor -Wdelete-non-virtual-dtor -Wsuggest-override -Wstring-conversion -Wmisleading-indentation -Wctad-maybe-unsupported -fdiagnostics-color -ffunction-sections -fdata-sections -O3 -DNDEBUG -std=c++17  -fno-exceptions -funwind-tables -fno-rtti -UNDEBUG -MD -MT tools/llvm-exegesis/lib/CMakeFiles/LLVMExegesis.dir/SnippetFile.cpp.o -MF tools/llvm-exegesis/lib/CMakeFiles/LLVMExegesis.dir/SnippetFile.cpp.o.d -o tools/llvm-exegesis/lib/CMakeFiles/LLVMExegesis.dir/SnippetFile.cpp.o -c /home/b/sanitizer-x86_64-linux/build/llvm-project/llvm/tools/llvm-exegesis/lib/SnippetFile.cpp
/home/b/sanitizer-x86_64-linux/build/llvm-project/llvm/tools/llvm-exegesis/lib/SnippetFile.cpp:221:25: error: private field 'Target' is not used [-Werror,-Wunused-private-field]
  221 |   const ExegesisTarget &Target;
      |                         ^
1 error generated.
[4707/5363] Building RISCVGenDAGISel.inc...
[4708/5363] Building CXX object tools/llvm-exegesis/lib/CMakeFiles/LLVMExegesis.dir/LlvmState.cpp.o
[4709/5363] Building CXX object tools/llvm-exegesis/lib/CMakeFiles/LLVMExegesis.dir/ParallelSnippetGenerator.cpp.o
[4710/5363] Building CXX object tools/llvm-exegesis/lib/CMakeFiles/LLVMExegesis.dir/SnippetGenerator.cpp.o
[4711/5363] Building CXX object tools/llvm-exegesis/lib/CMakeFiles/LLVMExegesis.dir/UopsBenchmarkRunner.cpp.o
[4712/5363] Building CXX object tools/llvm-exegesis/lib/PowerPC/CMakeFiles/LLVMExegesisPowerPC.dir/Target.cpp.o
[4713/5363] Building CXX object tools/llvm-exegesis/lib/Mips/CMakeFiles/LLVMExegesisMips.dir/Target.cpp.o
[4714/5363] Building CXX object tools/llvm-exegesis/lib/AArch64/CMakeFiles/LLVMExegesisAArch64.dir/Target.cpp.o
[4715/5363] Building CXX object tools/llvm-exegesis/lib/CMakeFiles/LLVMExegesis.dir/BenchmarkResult.cpp.o
[4716/5363] Building CXX object tools/llvm-exegesis/lib/CMakeFiles/LLVMExegesis.dir/LatencyBenchmarkRunner.cpp.o
[4717/5363] Building CXX object tools/llvm-exegesis/lib/CMakeFiles/LLVMExegesis.dir/SnippetRepetitor.cpp.o
[4718/5363] Building CXX object tools/llvm-exegesis/lib/CMakeFiles/LLVMExegesis.dir/Target.cpp.o
[4719/5363] Building CXX object tools/llvm-exegesis/lib/CMakeFiles/LLVMExegesis.dir/Assembler.cpp.o
[4720/5363] Building CXX object tools/llvm-exegesis/lib/CMakeFiles/LLVMExegesis.dir/BenchmarkRunner.cpp.o
[4721/5363] Building CXX object lib/Target/ARM/CMakeFiles/LLVMARMCodeGen.dir/ARMInstructionSelector.cpp.o
[4722/5363] Building CXX object lib/Target/PowerPC/CMakeFiles/LLVMPowerPCCodeGen.dir/GISel/PPCInstructionSelector.cpp.o
[4723/5363] Building AMDGPUGenAsmWriter.inc...
[4724/5363] Building AMDGPUGenGlobalISel.inc...
[4725/5363] Building AMDGPUGenDAGISel.inc...
[4726/5363] Building CXX object tools/llvm-exegesis/lib/X86/CMakeFiles/LLVMExegesisX86.dir/Target.cpp.o
[4727/5363] Building AMDGPUGenAsmMatcher.inc...
[4728/5363] Building AMDGPUGenInstrInfo.inc...
[4729/5363] Building AMDGPUGenRegisterBank.inc...
[4730/5363] Building CXX object lib/Target/AArch64/CMakeFiles/LLVMAArch64CodeGen.dir/GISel/AArch64InstructionSelector.cpp.o
[4731/5363] Building RISCVGenSubtargetInfo.inc...
[4732/5363] Building AMDGPUGenRegisterInfo.inc...
Step 9 (test compiler-rt symbolizer) failure: test compiler-rt symbolizer (failure)
...
+ cut -f 1,2 -d ' '
+ sort -u
+ grep -Ev '^#|^$' /home/b/sanitizer-x86_64-linux/build/llvm-project/compiler-rt/lib/sanitizer_common/symbolizer/scripts/global_symbols.txt
+ sort -u
+ diff -u expected.new undefined.new
+ grep -E '^\+[^+]'
+ cp -f symbolizer.o /home/b/sanitizer-x86_64-linux/build/build_default/runtimes/runtimes-bins/compiler-rt/lib/sanitizer_common/symbolizer/RTSanitizerCommonSymbolizerInternal.x86_64.o
+ echo 'Success!'
Success!
[2221/2587] Generating Nsan-x86_64-Test
FAILED: compiler-rt/lib/nsan/tests/Nsan-x86_64-Test /home/b/sanitizer-x86_64-linux/build/build_default/runtimes/runtimes-bins/compiler-rt/lib/nsan/tests/Nsan-x86_64-Test 
cd /home/b/sanitizer-x86_64-linux/build/build_default/runtimes/runtimes-bins/compiler-rt/lib/nsan/tests && /home/b/sanitizer-x86_64-linux/build/build_default/./bin/clang++ NsanTestObjects.NSanUnitTest.cpp.x86_64.o NsanTestObjects.nsan_unit_test_main.cpp.x86_64.o NsanTestObjects.gtest-all.cc.x86_64.o -o /home/b/sanitizer-x86_64-linux/build/build_default/runtimes/runtimes-bins/compiler-rt/lib/nsan/tests/./Nsan-x86_64-Test -fuse-ld=lld -Wl,--color-diagnostics -Wthread-safety -Wthread-safety-reference -Wthread-safety-beta -resource-dir=/home/b/sanitizer-x86_64-linux/build/build_default/./lib/../lib/clang/20 -lstdc++ -fsanitize=numerical -m64
ld.lld: error: cannot open /home/b/sanitizer-x86_64-linux/build/build_default/./lib/../lib/clang/20/lib/x86_64-unknown-linux-gnu/libclang_rt.nsan.a: No such file or directory
clang++: error: linker command failed with exit code 1 (use -v to see invocation)
[2222/2587] Generating RtsanTestObjects.gtest-all.cc.x86_64.o
ninja: build stopped: subcommand failed.
FAILED: runtimes/CMakeFiles/check-compiler-rt /home/b/sanitizer-x86_64-linux/build/build_default/runtimes/CMakeFiles/check-compiler-rt 
cd /home/b/sanitizer-x86_64-linux/build/build_default/runtimes/runtimes-bins && /usr/bin/cmake --build /home/b/sanitizer-x86_64-linux/build/build_default/runtimes/runtimes-bins/ --target check-compiler-rt --config Release
ninja: build stopped: subcommand failed.

How to reproduce locally: https://github.com/google/sanitizers/wiki/SanitizerBotReproduceBuild
Step 10 (build compiler-rt debug) failure: build compiler-rt debug (failure)
...
[4722/5363] Linking CXX static library lib/libLLVMX86AsmParser.a
[4723/5363] Linking CXX static library lib/libLLVMX86TargetMCA.a
[4724/5363] Linking CXX static library lib/libLLVMX86CodeGen.a
[4725/5363] Linking CXX static library lib/libclangHandleLLVM.a
[4726/5363] Linking CXX static library lib/libclangInterpreter.a
[4727/5363] Building RISCVGenInstrInfo.inc...
[4728/5363] Linking CXX executable bin/lli
[4729/5363] Building RISCVGenGlobalISel.inc...
[4730/5363] Building RISCVGenDAGISel.inc...
[4731/5363] Building CXX object tools/llvm-exegesis/lib/CMakeFiles/LLVMExegesis.dir/SnippetFile.cpp.o
FAILED: tools/llvm-exegesis/lib/CMakeFiles/LLVMExegesis.dir/SnippetFile.cpp.o 
CCACHE_CPP2=yes CCACHE_HASHDIR=yes /usr/bin/ccache /home/b/sanitizer-x86_64-linux/build/llvm_build0/bin/clang++ -DGTEST_HAS_RTTI=0 -DLLVM_BUILD_STATIC -D_DEBUG -D_GLIBCXX_ASSERTIONS -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I/home/b/sanitizer-x86_64-linux/build/build_default/tools/llvm-exegesis/lib -I/home/b/sanitizer-x86_64-linux/build/llvm-project/llvm/tools/llvm-exegesis/lib -I/home/b/sanitizer-x86_64-linux/build/build_default/include -I/home/b/sanitizer-x86_64-linux/build/llvm-project/llvm/include -fPIC -fno-semantic-interposition -fvisibility-inlines-hidden -Werror -Werror=date-time -Werror=unguarded-availability-new -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wmissing-field-initializers -pedantic -Wno-long-long -Wc++98-compat-extra-semi -Wimplicit-fallthrough -Wcovered-switch-default -Wno-noexcept-type -Wnon-virtual-dtor -Wdelete-non-virtual-dtor -Wsuggest-override -Wstring-conversion -Wmisleading-indentation -Wctad-maybe-unsupported -fdiagnostics-color -ffunction-sections -fdata-sections -O3 -DNDEBUG -std=c++17  -fno-exceptions -funwind-tables -fno-rtti -UNDEBUG -MD -MT tools/llvm-exegesis/lib/CMakeFiles/LLVMExegesis.dir/SnippetFile.cpp.o -MF tools/llvm-exegesis/lib/CMakeFiles/LLVMExegesis.dir/SnippetFile.cpp.o.d -o tools/llvm-exegesis/lib/CMakeFiles/LLVMExegesis.dir/SnippetFile.cpp.o -c /home/b/sanitizer-x86_64-linux/build/llvm-project/llvm/tools/llvm-exegesis/lib/SnippetFile.cpp
/home/b/sanitizer-x86_64-linux/build/llvm-project/llvm/tools/llvm-exegesis/lib/SnippetFile.cpp:221:25: error: private field 'Target' is not used [-Werror,-Wunused-private-field]
  221 |   const ExegesisTarget &Target;
      |                         ^
1 error generated.
[4732/5363] Building CXX object tools/llvm-exegesis/lib/CMakeFiles/LLVMExegesis.dir/SerialSnippetGenerator.cpp.o
FAILED: tools/llvm-exegesis/lib/CMakeFiles/LLVMExegesis.dir/SerialSnippetGenerator.cpp.o 
CCACHE_CPP2=yes CCACHE_HASHDIR=yes /usr/bin/ccache /home/b/sanitizer-x86_64-linux/build/llvm_build0/bin/clang++ -DGTEST_HAS_RTTI=0 -DLLVM_BUILD_STATIC -D_DEBUG -D_GLIBCXX_ASSERTIONS -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I/home/b/sanitizer-x86_64-linux/build/build_default/tools/llvm-exegesis/lib -I/home/b/sanitizer-x86_64-linux/build/llvm-project/llvm/tools/llvm-exegesis/lib -I/home/b/sanitizer-x86_64-linux/build/build_default/include -I/home/b/sanitizer-x86_64-linux/build/llvm-project/llvm/include -fPIC -fno-semantic-interposition -fvisibility-inlines-hidden -Werror -Werror=date-time -Werror=unguarded-availability-new -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wmissing-field-initializers -pedantic -Wno-long-long -Wc++98-compat-extra-semi -Wimplicit-fallthrough -Wcovered-switch-default -Wno-noexcept-type -Wnon-virtual-dtor -Wdelete-non-virtual-dtor -Wsuggest-override -Wstring-conversion -Wmisleading-indentation -Wctad-maybe-unsupported -fdiagnostics-color -ffunction-sections -fdata-sections -O3 -DNDEBUG -std=c++17  -fno-exceptions -funwind-tables -fno-rtti -UNDEBUG -MD -MT tools/llvm-exegesis/lib/CMakeFiles/LLVMExegesis.dir/SerialSnippetGenerator.cpp.o -MF tools/llvm-exegesis/lib/CMakeFiles/LLVMExegesis.dir/SerialSnippetGenerator.cpp.o.d -o tools/llvm-exegesis/lib/CMakeFiles/LLVMExegesis.dir/SerialSnippetGenerator.cpp.o -c /home/b/sanitizer-x86_64-linux/build/llvm-project/llvm/tools/llvm-exegesis/lib/SerialSnippetGenerator.cpp
/home/b/sanitizer-x86_64-linux/build/llvm-project/llvm/tools/llvm-exegesis/lib/SerialSnippetGenerator.cpp:56:24: error: unused variable 'OtherInstrDesc' [-Werror,-Wunused-variable]
   56 |     const MCInstrDesc &OtherInstrDesc = OtherInstr.Description;
      |                        ^~~~~~~~~~~~~~
1 error generated.
[4733/5363] Building AMDGPUGenAsmWriter.inc...
[4734/5363] Building AMDGPUGenGlobalISel.inc...
[4735/5363] Building AMDGPUGenAsmMatcher.inc...
[4736/5363] Building RISCVGenSubtargetInfo.inc...
[4737/5363] Building AMDGPUGenDAGISel.inc...
[4738/5363] Building AMDGPUGenInstrInfo.inc...
[4739/5363] Building AMDGPUGenRegisterBank.inc...
[4740/5363] Building AMDGPUGenRegisterInfo.inc...
ninja: build stopped: subcommand failed.

How to reproduce locally: https://github.com/google/sanitizers/wiki/SanitizerBotReproduceBuild
Step 11 (test compiler-rt debug) failure: test compiler-rt debug (failure)
...
llvm-lit: /home/b/sanitizer-x86_64-linux/build/llvm-project/compiler-rt/test/lit.common.cfg.py:248: warning: COMPILER_RT_TEST_STANDALONE_BUILD_LIBS=ON, but this test suite does not support testing the just-built runtime libraries when the test compiler is configured to use different runtime libraries. Either modify this test suite to support this test configuration, or set COMPILER_RT_TEST_STANDALONE_BUILD_LIBS=OFF to test the runtime libraries included in the compiler instead.
llvm-lit: /home/b/sanitizer-x86_64-linux/build/llvm-project/compiler-rt/test/lit.common.cfg.py:259: note: Testing using libraries in "/home/b/sanitizer-x86_64-linux/build/build_default/./lib/../lib/clang/20/lib/i386-unknown-linux-gnu"
llvm-lit: /home/b/sanitizer-x86_64-linux/build/llvm-project/compiler-rt/test/lit.common.cfg.py:237: warning: Compiler lib dir != compiler-rt lib dir
Compiler libdir:     "/home/b/sanitizer-x86_64-linux/build/build_default/lib/clang/20/lib/i386-unknown-linux-gnu"
compiler-rt libdir:  "/home/b/sanitizer-x86_64-linux/build/build_default/lib/clang/20/lib/x86_64-unknown-linux-gnu"
llvm-lit: /home/b/sanitizer-x86_64-linux/build/llvm-project/compiler-rt/test/lit.common.cfg.py:248: warning: COMPILER_RT_TEST_STANDALONE_BUILD_LIBS=ON, but this test suite does not support testing the just-built runtime libraries when the test compiler is configured to use different runtime libraries. Either modify this test suite to support this test configuration, or set COMPILER_RT_TEST_STANDALONE_BUILD_LIBS=OFF to test the runtime libraries included in the compiler instead.
llvm-lit: /home/b/sanitizer-x86_64-linux/build/llvm-project/compiler-rt/test/lit.common.cfg.py:259: note: Testing using libraries in "/home/b/sanitizer-x86_64-linux/build/build_default/./lib/../lib/clang/20/lib/x86_64-unknown-linux-gnu"
llvm-lit: /home/b/sanitizer-x86_64-linux/build/llvm-project/llvm/utils/lit/lit/main.py:72: 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: 4745 of 10508 tests, 88 workers --
Testing:  0.. 10.. 20.. 30.. 40.. 50.. 60.. 70
FAIL: TypeSanitizer-x86_64 :: anon-same-struct.c (3445 of 4745)
******************** TEST 'TypeSanitizer-x86_64 :: anon-same-struct.c' FAILED ********************
Exit Code: 1

Command Output (stderr):
--
RUN: at line 1: /home/b/sanitizer-x86_64-linux/build/build_default/./bin/clang  -fsanitize=type -mno-omit-leaf-frame-pointer -fno-omit-frame-pointer -fno-optimize-sibling-calls -gline-tables-only  -m64  -O0 /home/b/sanitizer-x86_64-linux/build/llvm-project/compiler-rt/test/tysan/anon-same-struct.c -o /home/b/sanitizer-x86_64-linux/build/build_default/runtimes/runtimes-bins/compiler-rt/test/tysan/X86_64Config/Output/anon-same-struct.c.tmp &&  /home/b/sanitizer-x86_64-linux/build/build_default/runtimes/runtimes-bins/compiler-rt/test/tysan/X86_64Config/Output/anon-same-struct.c.tmp >/home/b/sanitizer-x86_64-linux/build/build_default/runtimes/runtimes-bins/compiler-rt/test/tysan/X86_64Config/Output/anon-same-struct.c.tmp.out 2>&1
+ /home/b/sanitizer-x86_64-linux/build/build_default/./bin/clang -fsanitize=type -mno-omit-leaf-frame-pointer -fno-omit-frame-pointer -fno-optimize-sibling-calls -gline-tables-only -m64 -O0 /home/b/sanitizer-x86_64-linux/build/llvm-project/compiler-rt/test/tysan/anon-same-struct.c -o /home/b/sanitizer-x86_64-linux/build/build_default/runtimes/runtimes-bins/compiler-rt/test/tysan/X86_64Config/Output/anon-same-struct.c.tmp
ld: error: cannot open /home/b/sanitizer-x86_64-linux/build/build_default/lib/clang/20/lib/x86_64-unknown-linux-gnu/libclang_rt.tysan.a: No such file or directory
clang: error: linker command failed with exit code 1 (use -v to see invocation)

--

********************
Testing:  0.. 10.. 20.. 30.. 40.. 50.. 60.. 70
FAIL: TypeSanitizer-x86_64 :: basic.c (3451 of 4745)
******************** TEST 'TypeSanitizer-x86_64 :: basic.c' FAILED ********************
Exit Code: 1

Command Output (stderr):
--
RUN: at line 1: /home/b/sanitizer-x86_64-linux/build/build_default/./bin/clang  -fsanitize=type -mno-omit-leaf-frame-pointer -fno-omit-frame-pointer -fno-optimize-sibling-calls -gline-tables-only  -m64  -O0 /home/b/sanitizer-x86_64-linux/build/llvm-project/compiler-rt/test/tysan/basic.c -o /home/b/sanitizer-x86_64-linux/build/build_default/runtimes/runtimes-bins/compiler-rt/test/tysan/X86_64Config/Output/basic.c.tmp &&  /home/b/sanitizer-x86_64-linux/build/build_default/runtimes/runtimes-bins/compiler-rt/test/tysan/X86_64Config/Output/basic.c.tmp 10 >/home/b/sanitizer-x86_64-linux/build/build_default/runtimes/runtimes-bins/compiler-rt/test/tysan/X86_64Config/Output/basic.c.tmp.out.0 2>&1
+ /home/b/sanitizer-x86_64-linux/build/build_default/./bin/clang -fsanitize=type -mno-omit-leaf-frame-pointer -fno-omit-frame-pointer -fno-optimize-sibling-calls -gline-tables-only -m64 -O0 /home/b/sanitizer-x86_64-linux/build/llvm-project/compiler-rt/test/tysan/basic.c -o /home/b/sanitizer-x86_64-linux/build/build_default/runtimes/runtimes-bins/compiler-rt/test/tysan/X86_64Config/Output/basic.c.tmp
ld: error: cannot open /home/b/sanitizer-x86_64-linux/build/build_default/lib/clang/20/lib/x86_64-unknown-linux-gnu/libclang_rt.tysan.a: No such file or directory
clang: error: linker command failed with exit code 1 (use -v to see invocation)

--

********************
Testing:  0.. 10.. 20.. 30.. 40.. 50.. 60.. 70
FAIL: TypeSanitizer-x86_64 :: anon-struct.c (3453 of 4745)
******************** TEST 'TypeSanitizer-x86_64 :: anon-struct.c' FAILED ********************
Exit Code: 1

Command Output (stderr):
--
RUN: at line 1: /home/b/sanitizer-x86_64-linux/build/build_default/./bin/clang  -fsanitize=type -mno-omit-leaf-frame-pointer -fno-omit-frame-pointer -fno-optimize-sibling-calls -gline-tables-only  -m64  -O0 /home/b/sanitizer-x86_64-linux/build/llvm-project/compiler-rt/test/tysan/anon-struct.c -o /home/b/sanitizer-x86_64-linux/build/build_default/runtimes/runtimes-bins/compiler-rt/test/tysan/X86_64Config/Output/anon-struct.c.tmp &&  /home/b/sanitizer-x86_64-linux/build/build_default/runtimes/runtimes-bins/compiler-rt/test/tysan/X86_64Config/Output/anon-struct.c.tmp >/home/b/sanitizer-x86_64-linux/build/build_default/runtimes/runtimes-bins/compiler-rt/test/tysan/X86_64Config/Output/anon-struct.c.tmp.out 2>&1
+ /home/b/sanitizer-x86_64-linux/build/build_default/./bin/clang -fsanitize=type -mno-omit-leaf-frame-pointer -fno-omit-frame-pointer -fno-optimize-sibling-calls -gline-tables-only -m64 -O0 /home/b/sanitizer-x86_64-linux/build/llvm-project/compiler-rt/test/tysan/anon-struct.c -o /home/b/sanitizer-x86_64-linux/build/build_default/runtimes/runtimes-bins/compiler-rt/test/tysan/X86_64Config/Output/anon-struct.c.tmp
ld: error: cannot open /home/b/sanitizer-x86_64-linux/build/build_default/lib/clang/20/lib/x86_64-unknown-linux-gnu/libclang_rt.tysan.a: No such file or directory
Step 12 (build compiler-rt tsan_debug) failure: build compiler-rt tsan_debug (failure)
...
[4703/5344] Linking CXX static library lib/libLLVMX86Desc.a
[4704/5344] Linking CXX static library lib/libLLVMX86Disassembler.a
[4705/5344] Linking CXX static library lib/libLLVMX86TargetMCA.a
[4706/5344] Linking CXX static library lib/libLLVMX86AsmParser.a
[4707/5344] Linking CXX static library lib/libLLVMX86CodeGen.a
[4708/5344] Linking CXX static library lib/libclangInterpreter.a
[4709/5344] Linking CXX static library lib/libclangHandleLLVM.a
[4710/5344] Linking CXX executable bin/lli
[4711/5344] Building RISCVGenDAGISel.inc...
[4712/5344] Building CXX object tools/llvm-exegesis/lib/CMakeFiles/LLVMExegesis.dir/SerialSnippetGenerator.cpp.o
FAILED: tools/llvm-exegesis/lib/CMakeFiles/LLVMExegesis.dir/SerialSnippetGenerator.cpp.o 
CCACHE_CPP2=yes CCACHE_HASHDIR=yes /usr/bin/ccache /home/b/sanitizer-x86_64-linux/build/llvm_build0/bin/clang++ -DGTEST_HAS_RTTI=0 -DLLVM_BUILD_STATIC -D_DEBUG -D_GLIBCXX_ASSERTIONS -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I/home/b/sanitizer-x86_64-linux/build/build_default/tools/llvm-exegesis/lib -I/home/b/sanitizer-x86_64-linux/build/llvm-project/llvm/tools/llvm-exegesis/lib -I/home/b/sanitizer-x86_64-linux/build/build_default/include -I/home/b/sanitizer-x86_64-linux/build/llvm-project/llvm/include -fPIC -fno-semantic-interposition -fvisibility-inlines-hidden -Werror -Werror=date-time -Werror=unguarded-availability-new -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wmissing-field-initializers -pedantic -Wno-long-long -Wc++98-compat-extra-semi -Wimplicit-fallthrough -Wcovered-switch-default -Wno-noexcept-type -Wnon-virtual-dtor -Wdelete-non-virtual-dtor -Wsuggest-override -Wstring-conversion -Wmisleading-indentation -Wctad-maybe-unsupported -fdiagnostics-color -ffunction-sections -fdata-sections -O3 -DNDEBUG -std=c++17  -fno-exceptions -funwind-tables -fno-rtti -UNDEBUG -MD -MT tools/llvm-exegesis/lib/CMakeFiles/LLVMExegesis.dir/SerialSnippetGenerator.cpp.o -MF tools/llvm-exegesis/lib/CMakeFiles/LLVMExegesis.dir/SerialSnippetGenerator.cpp.o.d -o tools/llvm-exegesis/lib/CMakeFiles/LLVMExegesis.dir/SerialSnippetGenerator.cpp.o -c /home/b/sanitizer-x86_64-linux/build/llvm-project/llvm/tools/llvm-exegesis/lib/SerialSnippetGenerator.cpp
/home/b/sanitizer-x86_64-linux/build/llvm-project/llvm/tools/llvm-exegesis/lib/SerialSnippetGenerator.cpp:56:24: error: unused variable 'OtherInstrDesc' [-Werror,-Wunused-variable]
   56 |     const MCInstrDesc &OtherInstrDesc = OtherInstr.Description;
      |                        ^~~~~~~~~~~~~~
1 error generated.
[4713/5344] Building CXX object tools/llvm-exegesis/lib/CMakeFiles/LLVMExegesis.dir/SnippetFile.cpp.o
FAILED: tools/llvm-exegesis/lib/CMakeFiles/LLVMExegesis.dir/SnippetFile.cpp.o 
CCACHE_CPP2=yes CCACHE_HASHDIR=yes /usr/bin/ccache /home/b/sanitizer-x86_64-linux/build/llvm_build0/bin/clang++ -DGTEST_HAS_RTTI=0 -DLLVM_BUILD_STATIC -D_DEBUG -D_GLIBCXX_ASSERTIONS -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I/home/b/sanitizer-x86_64-linux/build/build_default/tools/llvm-exegesis/lib -I/home/b/sanitizer-x86_64-linux/build/llvm-project/llvm/tools/llvm-exegesis/lib -I/home/b/sanitizer-x86_64-linux/build/build_default/include -I/home/b/sanitizer-x86_64-linux/build/llvm-project/llvm/include -fPIC -fno-semantic-interposition -fvisibility-inlines-hidden -Werror -Werror=date-time -Werror=unguarded-availability-new -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wmissing-field-initializers -pedantic -Wno-long-long -Wc++98-compat-extra-semi -Wimplicit-fallthrough -Wcovered-switch-default -Wno-noexcept-type -Wnon-virtual-dtor -Wdelete-non-virtual-dtor -Wsuggest-override -Wstring-conversion -Wmisleading-indentation -Wctad-maybe-unsupported -fdiagnostics-color -ffunction-sections -fdata-sections -O3 -DNDEBUG -std=c++17  -fno-exceptions -funwind-tables -fno-rtti -UNDEBUG -MD -MT tools/llvm-exegesis/lib/CMakeFiles/LLVMExegesis.dir/SnippetFile.cpp.o -MF tools/llvm-exegesis/lib/CMakeFiles/LLVMExegesis.dir/SnippetFile.cpp.o.d -o tools/llvm-exegesis/lib/CMakeFiles/LLVMExegesis.dir/SnippetFile.cpp.o -c /home/b/sanitizer-x86_64-linux/build/llvm-project/llvm/tools/llvm-exegesis/lib/SnippetFile.cpp
/home/b/sanitizer-x86_64-linux/build/llvm-project/llvm/tools/llvm-exegesis/lib/SnippetFile.cpp:221:25: error: private field 'Target' is not used [-Werror,-Wunused-private-field]
  221 |   const ExegesisTarget &Target;
      |                         ^
1 error generated.
[4714/5344] Building RISCVGenSubtargetInfo.inc...
[4715/5344] Building AMDGPUGenAsmWriter.inc...
[4716/5344] Building AMDGPUGenDAGISel.inc...
[4717/5344] Building AMDGPUGenInstrInfo.inc...
[4718/5344] Building AMDGPUGenAsmMatcher.inc...
[4719/5344] Building AMDGPUGenGlobalISel.inc...
[4720/5344] Building AMDGPUGenRegisterBank.inc...
[4721/5344] Building AMDGPUGenRegisterInfo.inc...
ninja: build stopped: subcommand failed.

How to reproduce locally: https://github.com/google/sanitizers/wiki/SanitizerBotReproduceBuild
Step 13 (build compiler-rt default) failure: build compiler-rt default (failure)
...
[4721/5363] Linking CXX static library lib/libLLVMX86Disassembler.a
[4722/5363] Linking CXX static library lib/libLLVMX86AsmParser.a
[4723/5363] Linking CXX static library lib/libLLVMX86TargetMCA.a
[4724/5363] Linking CXX static library lib/libLLVMX86CodeGen.a
[4725/5363] Linking CXX static library lib/libclangInterpreter.a
[4726/5363] Linking CXX static library lib/libclangHandleLLVM.a
[4727/5363] Building RISCVGenInstrInfo.inc...
[4728/5363] Linking CXX executable bin/lli
[4729/5363] Building RISCVGenGlobalISel.inc...
[4730/5363] Building CXX object tools/llvm-exegesis/lib/CMakeFiles/LLVMExegesis.dir/SerialSnippetGenerator.cpp.o
FAILED: tools/llvm-exegesis/lib/CMakeFiles/LLVMExegesis.dir/SerialSnippetGenerator.cpp.o 
CCACHE_CPP2=yes CCACHE_HASHDIR=yes /usr/bin/ccache /home/b/sanitizer-x86_64-linux/build/llvm_build0/bin/clang++ -DGTEST_HAS_RTTI=0 -DLLVM_BUILD_STATIC -D_DEBUG -D_GLIBCXX_ASSERTIONS -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I/home/b/sanitizer-x86_64-linux/build/build_default/tools/llvm-exegesis/lib -I/home/b/sanitizer-x86_64-linux/build/llvm-project/llvm/tools/llvm-exegesis/lib -I/home/b/sanitizer-x86_64-linux/build/build_default/include -I/home/b/sanitizer-x86_64-linux/build/llvm-project/llvm/include -fPIC -fno-semantic-interposition -fvisibility-inlines-hidden -Werror -Werror=date-time -Werror=unguarded-availability-new -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wmissing-field-initializers -pedantic -Wno-long-long -Wc++98-compat-extra-semi -Wimplicit-fallthrough -Wcovered-switch-default -Wno-noexcept-type -Wnon-virtual-dtor -Wdelete-non-virtual-dtor -Wsuggest-override -Wstring-conversion -Wmisleading-indentation -Wctad-maybe-unsupported -fdiagnostics-color -ffunction-sections -fdata-sections -O3 -DNDEBUG -std=c++17  -fno-exceptions -funwind-tables -fno-rtti -UNDEBUG -MD -MT tools/llvm-exegesis/lib/CMakeFiles/LLVMExegesis.dir/SerialSnippetGenerator.cpp.o -MF tools/llvm-exegesis/lib/CMakeFiles/LLVMExegesis.dir/SerialSnippetGenerator.cpp.o.d -o tools/llvm-exegesis/lib/CMakeFiles/LLVMExegesis.dir/SerialSnippetGenerator.cpp.o -c /home/b/sanitizer-x86_64-linux/build/llvm-project/llvm/tools/llvm-exegesis/lib/SerialSnippetGenerator.cpp
/home/b/sanitizer-x86_64-linux/build/llvm-project/llvm/tools/llvm-exegesis/lib/SerialSnippetGenerator.cpp:56:24: error: unused variable 'OtherInstrDesc' [-Werror,-Wunused-variable]
   56 |     const MCInstrDesc &OtherInstrDesc = OtherInstr.Description;
      |                        ^~~~~~~~~~~~~~
1 error generated.
[4731/5363] Building CXX object tools/llvm-exegesis/lib/CMakeFiles/LLVMExegesis.dir/SnippetFile.cpp.o
FAILED: tools/llvm-exegesis/lib/CMakeFiles/LLVMExegesis.dir/SnippetFile.cpp.o 
CCACHE_CPP2=yes CCACHE_HASHDIR=yes /usr/bin/ccache /home/b/sanitizer-x86_64-linux/build/llvm_build0/bin/clang++ -DGTEST_HAS_RTTI=0 -DLLVM_BUILD_STATIC -D_DEBUG -D_GLIBCXX_ASSERTIONS -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I/home/b/sanitizer-x86_64-linux/build/build_default/tools/llvm-exegesis/lib -I/home/b/sanitizer-x86_64-linux/build/llvm-project/llvm/tools/llvm-exegesis/lib -I/home/b/sanitizer-x86_64-linux/build/build_default/include -I/home/b/sanitizer-x86_64-linux/build/llvm-project/llvm/include -fPIC -fno-semantic-interposition -fvisibility-inlines-hidden -Werror -Werror=date-time -Werror=unguarded-availability-new -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wmissing-field-initializers -pedantic -Wno-long-long -Wc++98-compat-extra-semi -Wimplicit-fallthrough -Wcovered-switch-default -Wno-noexcept-type -Wnon-virtual-dtor -Wdelete-non-virtual-dtor -Wsuggest-override -Wstring-conversion -Wmisleading-indentation -Wctad-maybe-unsupported -fdiagnostics-color -ffunction-sections -fdata-sections -O3 -DNDEBUG -std=c++17  -fno-exceptions -funwind-tables -fno-rtti -UNDEBUG -MD -MT tools/llvm-exegesis/lib/CMakeFiles/LLVMExegesis.dir/SnippetFile.cpp.o -MF tools/llvm-exegesis/lib/CMakeFiles/LLVMExegesis.dir/SnippetFile.cpp.o.d -o tools/llvm-exegesis/lib/CMakeFiles/LLVMExegesis.dir/SnippetFile.cpp.o -c /home/b/sanitizer-x86_64-linux/build/llvm-project/llvm/tools/llvm-exegesis/lib/SnippetFile.cpp
/home/b/sanitizer-x86_64-linux/build/llvm-project/llvm/tools/llvm-exegesis/lib/SnippetFile.cpp:221:25: error: private field 'Target' is not used [-Werror,-Wunused-private-field]
  221 |   const ExegesisTarget &Target;
      |                         ^
1 error generated.
[4732/5363] Building RISCVGenDAGISel.inc...
[4733/5363] Building AMDGPUGenAsmWriter.inc...
[4734/5363] Building AMDGPUGenAsmMatcher.inc...
[4735/5363] Building RISCVGenSubtargetInfo.inc...
[4736/5363] Building AMDGPUGenGlobalISel.inc...
[4737/5363] Building AMDGPUGenDAGISel.inc...
[4738/5363] Building AMDGPUGenRegisterBank.inc...
[4739/5363] Building AMDGPUGenRegisterInfo.inc...
[4740/5363] Building AMDGPUGenInstrInfo.inc...
ninja: build stopped: subcommand failed.

How to reproduce locally: https://github.com/google/sanitizers/wiki/SanitizerBotReproduceBuild
Step 14 (test compiler-rt default) failure: test compiler-rt default (failure)
...
llvm-lit: /home/b/sanitizer-x86_64-linux/build/llvm-project/compiler-rt/test/lit.common.cfg.py:248: warning: COMPILER_RT_TEST_STANDALONE_BUILD_LIBS=ON, but this test suite does not support testing the just-built runtime libraries when the test compiler is configured to use different runtime libraries. Either modify this test suite to support this test configuration, or set COMPILER_RT_TEST_STANDALONE_BUILD_LIBS=OFF to test the runtime libraries included in the compiler instead.
llvm-lit: /home/b/sanitizer-x86_64-linux/build/llvm-project/compiler-rt/test/lit.common.cfg.py:259: note: Testing using libraries in "/home/b/sanitizer-x86_64-linux/build/build_default/./lib/../lib/clang/20/lib/i386-unknown-linux-gnu"
llvm-lit: /home/b/sanitizer-x86_64-linux/build/llvm-project/compiler-rt/test/lit.common.cfg.py:237: warning: Compiler lib dir != compiler-rt lib dir
Compiler libdir:     "/home/b/sanitizer-x86_64-linux/build/build_default/lib/clang/20/lib/i386-unknown-linux-gnu"
compiler-rt libdir:  "/home/b/sanitizer-x86_64-linux/build/build_default/lib/clang/20/lib/x86_64-unknown-linux-gnu"
llvm-lit: /home/b/sanitizer-x86_64-linux/build/llvm-project/compiler-rt/test/lit.common.cfg.py:248: warning: COMPILER_RT_TEST_STANDALONE_BUILD_LIBS=ON, but this test suite does not support testing the just-built runtime libraries when the test compiler is configured to use different runtime libraries. Either modify this test suite to support this test configuration, or set COMPILER_RT_TEST_STANDALONE_BUILD_LIBS=OFF to test the runtime libraries included in the compiler instead.
llvm-lit: /home/b/sanitizer-x86_64-linux/build/llvm-project/compiler-rt/test/lit.common.cfg.py:259: note: Testing using libraries in "/home/b/sanitizer-x86_64-linux/build/build_default/./lib/../lib/clang/20/lib/x86_64-unknown-linux-gnu"
llvm-lit: /home/b/sanitizer-x86_64-linux/build/llvm-project/llvm/utils/lit/lit/main.py:72: 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: 10525 tests, 88 workers --
Testing:  0.. 10.. 20.. 30.. 40.. 50.. 60.. 70..
FAIL: TypeSanitizer-x86_64 :: anon-same-struct.c (8240 of 10525)
******************** TEST 'TypeSanitizer-x86_64 :: anon-same-struct.c' FAILED ********************
Exit Code: 1

Command Output (stderr):
--
RUN: at line 1: /home/b/sanitizer-x86_64-linux/build/build_default/./bin/clang  -fsanitize=type -mno-omit-leaf-frame-pointer -fno-omit-frame-pointer -fno-optimize-sibling-calls -gline-tables-only  -m64  -O0 /home/b/sanitizer-x86_64-linux/build/llvm-project/compiler-rt/test/tysan/anon-same-struct.c -o /home/b/sanitizer-x86_64-linux/build/build_default/runtimes/runtimes-bins/compiler-rt/test/tysan/X86_64Config/Output/anon-same-struct.c.tmp &&  /home/b/sanitizer-x86_64-linux/build/build_default/runtimes/runtimes-bins/compiler-rt/test/tysan/X86_64Config/Output/anon-same-struct.c.tmp >/home/b/sanitizer-x86_64-linux/build/build_default/runtimes/runtimes-bins/compiler-rt/test/tysan/X86_64Config/Output/anon-same-struct.c.tmp.out 2>&1
+ /home/b/sanitizer-x86_64-linux/build/build_default/./bin/clang -fsanitize=type -mno-omit-leaf-frame-pointer -fno-omit-frame-pointer -fno-optimize-sibling-calls -gline-tables-only -m64 -O0 /home/b/sanitizer-x86_64-linux/build/llvm-project/compiler-rt/test/tysan/anon-same-struct.c -o /home/b/sanitizer-x86_64-linux/build/build_default/runtimes/runtimes-bins/compiler-rt/test/tysan/X86_64Config/Output/anon-same-struct.c.tmp
ld: error: cannot open /home/b/sanitizer-x86_64-linux/build/build_default/lib/clang/20/lib/x86_64-unknown-linux-gnu/libclang_rt.tysan.a: No such file or directory
clang: error: linker command failed with exit code 1 (use -v to see invocation)

--

********************
Testing:  0.. 10.. 20.. 30.. 40.. 50.. 60.. 70..
FAIL: TypeSanitizer-x86_64 :: anon-struct.c (8241 of 10525)
******************** TEST 'TypeSanitizer-x86_64 :: anon-struct.c' FAILED ********************
Exit Code: 1

Command Output (stderr):
--
RUN: at line 1: /home/b/sanitizer-x86_64-linux/build/build_default/./bin/clang  -fsanitize=type -mno-omit-leaf-frame-pointer -fno-omit-frame-pointer -fno-optimize-sibling-calls -gline-tables-only  -m64  -O0 /home/b/sanitizer-x86_64-linux/build/llvm-project/compiler-rt/test/tysan/anon-struct.c -o /home/b/sanitizer-x86_64-linux/build/build_default/runtimes/runtimes-bins/compiler-rt/test/tysan/X86_64Config/Output/anon-struct.c.tmp &&  /home/b/sanitizer-x86_64-linux/build/build_default/runtimes/runtimes-bins/compiler-rt/test/tysan/X86_64Config/Output/anon-struct.c.tmp >/home/b/sanitizer-x86_64-linux/build/build_default/runtimes/runtimes-bins/compiler-rt/test/tysan/X86_64Config/Output/anon-struct.c.tmp.out 2>&1
+ /home/b/sanitizer-x86_64-linux/build/build_default/./bin/clang -fsanitize=type -mno-omit-leaf-frame-pointer -fno-omit-frame-pointer -fno-optimize-sibling-calls -gline-tables-only -m64 -O0 /home/b/sanitizer-x86_64-linux/build/llvm-project/compiler-rt/test/tysan/anon-struct.c -o /home/b/sanitizer-x86_64-linux/build/build_default/runtimes/runtimes-bins/compiler-rt/test/tysan/X86_64Config/Output/anon-struct.c.tmp
ld: error: cannot open /home/b/sanitizer-x86_64-linux/build/build_default/lib/clang/20/lib/x86_64-unknown-linux-gnu/libclang_rt.tysan.a: No such file or directory
clang: error: linker command failed with exit code 1 (use -v to see invocation)

--

********************
Testing:  0.. 10.. 20.. 30.. 40.. 50.. 60.. 70..
FAIL: TypeSanitizer-x86_64 :: global.c (8242 of 10525)
******************** TEST 'TypeSanitizer-x86_64 :: global.c' FAILED ********************
Exit Code: 1

Command Output (stderr):
--
RUN: at line 1: /home/b/sanitizer-x86_64-linux/build/build_default/./bin/clang  -fsanitize=type -mno-omit-leaf-frame-pointer -fno-omit-frame-pointer -fno-optimize-sibling-calls -gline-tables-only  -m64  -O0 /home/b/sanitizer-x86_64-linux/build/llvm-project/compiler-rt/test/tysan/global.c -o /home/b/sanitizer-x86_64-linux/build/build_default/runtimes/runtimes-bins/compiler-rt/test/tysan/X86_64Config/Output/global.c.tmp &&  /home/b/sanitizer-x86_64-linux/build/build_default/runtimes/runtimes-bins/compiler-rt/test/tysan/X86_64Config/Output/global.c.tmp >/home/b/sanitizer-x86_64-linux/build/build_default/runtimes/runtimes-bins/compiler-rt/test/tysan/X86_64Config/Output/global.c.tmp.out 2>&1
+ /home/b/sanitizer-x86_64-linux/build/build_default/./bin/clang -fsanitize=type -mno-omit-leaf-frame-pointer -fno-omit-frame-pointer -fno-optimize-sibling-calls -gline-tables-only -m64 -O0 /home/b/sanitizer-x86_64-linux/build/llvm-project/compiler-rt/test/tysan/global.c -o /home/b/sanitizer-x86_64-linux/build/build_default/runtimes/runtimes-bins/compiler-rt/test/tysan/X86_64Config/Output/global.c.tmp
ld: error: cannot open /home/b/sanitizer-x86_64-linux/build/build_default/lib/clang/20/lib/x86_64-unknown-linux-gnu/libclang_rt.tysan.a: No such file or directory

```

</details>

https://github.com/llvm/llvm-project/pull/89047