[llvm] [offload][SYCL] Add Module splitting by categories. (PR #131347)

Tue Aug 5 08:17:27 PDT 2025

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `ppc64le-lld-multistage-test` running on `ppc64le-lld-multistage-test` while building `llvm` at step 12 "build-stage2-unified-tree".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/168/builds/14945

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

```
Step 12 (build-stage2-unified-tree) failure: build (failure)
...
30.734 [1/8/16] Building CXX object tools/clang/utils/TableGen/CMakeFiles/clang-tblgen.dir/ClangOptionDocEmitter.cpp.o
35.234 [1/7/17] Building CXX object tools/clang/utils/TableGen/CMakeFiles/clang-tblgen.dir/ClangOpenCLBuiltinEmitter.cpp.o
40.194 [1/6/18] Building CXX object tools/clang/utils/TableGen/CMakeFiles/clang-tblgen.dir/RISCVVEmitter.cpp.o
48.444 [1/5/19] Building CXX object tools/clang/utils/TableGen/CMakeFiles/clang-tblgen.dir/ClangDiagnosticsEmitter.cpp.o
49.544 [1/4/20] Building CXX object tools/clang/utils/TableGen/CMakeFiles/clang-tblgen.dir/SveEmitter.cpp.o
57.398 [1/3/21] Building CXX object tools/clang/utils/TableGen/CMakeFiles/clang-tblgen.dir/MveEmitter.cpp.o
69.000 [1/2/22] Building CXX object tools/clang/utils/TableGen/CMakeFiles/clang-tblgen.dir/NeonEmitter.cpp.o
101.884 [1/1/23] Building CXX object tools/clang/utils/TableGen/CMakeFiles/clang-tblgen.dir/ClangAttrEmitter.cpp.o
102.035 [0/1/24] Linking CXX executable bin/clang-tblgen
182.117 [4295/1154/1188] Building CXX object lib/Transforms/Utils/CMakeFiles/LLVMTransformUtils.dir/SplitModuleByCategory.cpp.o
FAILED: lib/Transforms/Utils/CMakeFiles/LLVMTransformUtils.dir/SplitModuleByCategory.cpp.o 
ccache /home/buildbots/llvm-external-buildbots/workers/ppc64le-lld-multistage-test/ppc64le-lld-multistage-test/install/stage1/bin/clang++ -DEXPERIMENTAL_KEY_INSTRUCTIONS -DGTEST_HAS_RTTI=0 -D_DEBUG -D_GLIBCXX_ASSERTIONS -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -D__SHORT_FILE__=\"SplitModuleByCategory.cpp\" -I/home/buildbots/llvm-external-buildbots/workers/ppc64le-lld-multistage-test/ppc64le-lld-multistage-test/build/stage2/lib/Transforms/Utils -I/home/buildbots/llvm-external-buildbots/workers/ppc64le-lld-multistage-test/ppc64le-lld-multistage-test/llvm-project/llvm/lib/Transforms/Utils -I/home/buildbots/llvm-external-buildbots/workers/ppc64le-lld-multistage-test/ppc64le-lld-multistage-test/build/stage2/include -I/home/buildbots/llvm-external-buildbots/workers/ppc64le-lld-multistage-test/ppc64le-lld-multistage-test/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 lib/Transforms/Utils/CMakeFiles/LLVMTransformUtils.dir/SplitModuleByCategory.cpp.o -MF lib/Transforms/Utils/CMakeFiles/LLVMTransformUtils.dir/SplitModuleByCategory.cpp.o.d -o lib/Transforms/Utils/CMakeFiles/LLVMTransformUtils.dir/SplitModuleByCategory.cpp.o -c /home/buildbots/llvm-external-buildbots/workers/ppc64le-lld-multistage-test/ppc64le-lld-multistage-test/llvm-project/llvm/lib/Transforms/Utils/SplitModuleByCategory.cpp
/home/buildbots/llvm-external-buildbots/workers/ppc64le-lld-multistage-test/ppc64le-lld-multistage-test/llvm-project/llvm/lib/Transforms/Utils/SplitModuleByCategory.cpp:321:14: error: moving a temporary object prevents copy elision [-Werror,-Wpessimizing-move]
  321 |     Callback(std::move(MD.releaseModule()));
      |              ^
/home/buildbots/llvm-external-buildbots/workers/ppc64le-lld-multistage-test/ppc64le-lld-multistage-test/llvm-project/llvm/lib/Transforms/Utils/SplitModuleByCategory.cpp:321:14: note: remove std::move call here
  321 |     Callback(std::move(MD.releaseModule()));
      |              ^~~~~~~~~~                  ~
1 error generated.
234.197 [4295/23/2319] Building CXX object lib/Bitcode/Reader/CMakeFiles/LLVMBitReader.dir/BitcodeReader.cpp.o
235.061 [4295/21/2321] Building CXX object lib/Transforms/Vectorize/CMakeFiles/LLVMVectorize.dir/LoopVectorize.cpp.o
236.262 [4295/20/2322] Building CXX object lib/Transforms/InstCombine/CMakeFiles/LLVMInstCombine.dir/InstructionCombining.cpp.o
236.354 [4295/19/2323] Building CXX object unittests/ADT/CMakeFiles/ADTTests.dir/DenseMapTest.cpp.o
238.388 [4295/18/2324] Building CXX object unittests/Frontend/CMakeFiles/LLVMFrontendTests.dir/OpenMPDecompositionTest.cpp.o
238.516 [4295/17/2325] Building CXX object lib/Transforms/IPO/CMakeFiles/LLVMipo.dir/MemProfContextDisambiguation.cpp.o
238.675 [4295/16/2326] Building CXX object lib/Transforms/Scalar/CMakeFiles/LLVMScalarOpts.dir/LoopStrengthReduce.cpp.o
240.505 [4295/15/2327] Building CXX object lib/CodeGen/SelectionDAG/CMakeFiles/LLVMSelectionDAG.dir/SelectionDAGBuilder.cpp.o
245.175 [4295/14/2328] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/TargetLibraryInfo.cpp.o
246.221 [4295/13/2329] Building CXX object lib/Transforms/IPO/CMakeFiles/LLVMipo.dir/AttributorAttributes.cpp.o
246.249 [4295/12/2330] Building CXX object lib/Passes/CMakeFiles/LLVMPasses.dir/StandardInstrumentations.cpp.o
246.713 [4295/11/2331] Building CXX object lib/CodeGen/AsmPrinter/CMakeFiles/LLVMAsmPrinter.dir/CodeViewDebug.cpp.o
249.447 [4295/10/2332] Building CXX object lib/Transforms/IPO/CMakeFiles/LLVMipo.dir/OpenMPOpt.cpp.o
249.746 [4295/9/2333] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/ScalarEvolution.cpp.o
252.096 [4295/8/2334] Building CXX object unittests/Frontend/CMakeFiles/LLVMFrontendTests.dir/OpenMPIRBuilderTest.cpp.o
254.598 [4295/7/2335] Building CXX object unittests/ADT/CMakeFiles/ADTTests.dir/APFloatTest.cpp.o
254.641 [4295/6/2336] Building CXX object lib/CodeGen/AsmPrinter/CMakeFiles/LLVMAsmPrinter.dir/DwarfDebug.cpp.o
257.836 [4295/5/2337] Building CXX object unittests/IR/CMakeFiles/IRTests.dir/PassBuilderCallbacksTest.cpp.o
303.546 [4295/4/2338] Building CXX object lib/CodeGen/SelectionDAG/CMakeFiles/LLVMSelectionDAG.dir/DAGCombiner.cpp.o
304.690 [4295/3/2339] Building CXX object unittests/ADT/CMakeFiles/ADTTests.dir/SmallVectorTest.cpp.o
312.400 [4295/2/2340] Building CXX object lib/Passes/CMakeFiles/LLVMPasses.dir/PassBuilder.cpp.o
357.460 [4295/1/2341] Building CXX object lib/Transforms/Vectorize/CMakeFiles/LLVMVectorize.dir/SLPVectorizer.cpp.o
ninja: build stopped: subcommand failed.

```

</details>

https://github.com/llvm/llvm-project/pull/131347