[llvm] [LV] Replace UncountableEdge with UncountableEarlyExitingBlock (NFC). (PR #151311)

Fri Aug 1 02:11:01 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/14806

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

```
Step 12 (build-stage2-unified-tree) failure: build (failure)
...
20.874 [1/8/16] Building CXX object tools/clang/utils/TableGen/CMakeFiles/clang-tblgen.dir/ClangOptionDocEmitter.cpp.o
22.334 [1/7/17] Building CXX object tools/clang/utils/TableGen/CMakeFiles/clang-tblgen.dir/ClangOpenCLBuiltinEmitter.cpp.o
33.155 [1/6/18] Building CXX object tools/clang/utils/TableGen/CMakeFiles/clang-tblgen.dir/RISCVVEmitter.cpp.o
40.444 [1/5/19] Building CXX object tools/clang/utils/TableGen/CMakeFiles/clang-tblgen.dir/SveEmitter.cpp.o
51.044 [1/4/20] Building CXX object tools/clang/utils/TableGen/CMakeFiles/clang-tblgen.dir/ClangDiagnosticsEmitter.cpp.o
55.844 [1/3/21] Building CXX object tools/clang/utils/TableGen/CMakeFiles/clang-tblgen.dir/MveEmitter.cpp.o
60.144 [1/2/22] Building CXX object tools/clang/utils/TableGen/CMakeFiles/clang-tblgen.dir/NeonEmitter.cpp.o
97.133 [1/1/23] Building CXX object tools/clang/utils/TableGen/CMakeFiles/clang-tblgen.dir/ClangAttrEmitter.cpp.o
97.193 [0/1/24] Linking CXX executable bin/clang-tblgen
195.851 [4086/910/1636] Building CXX object lib/Transforms/Vectorize/CMakeFiles/LLVMVectorize.dir/LoopVectorizationLegality.cpp.o
FAILED: lib/Transforms/Vectorize/CMakeFiles/LLVMVectorize.dir/LoopVectorizationLegality.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__=\"LoopVectorizationLegality.cpp\" -I/home/buildbots/llvm-external-buildbots/workers/ppc64le-lld-multistage-test/ppc64le-lld-multistage-test/build/stage2/lib/Transforms/Vectorize -I/home/buildbots/llvm-external-buildbots/workers/ppc64le-lld-multistage-test/ppc64le-lld-multistage-test/llvm-project/llvm/lib/Transforms/Vectorize -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/Vectorize/CMakeFiles/LLVMVectorize.dir/LoopVectorizationLegality.cpp.o -MF lib/Transforms/Vectorize/CMakeFiles/LLVMVectorize.dir/LoopVectorizationLegality.cpp.o.d -o lib/Transforms/Vectorize/CMakeFiles/LLVMVectorize.dir/LoopVectorizationLegality.cpp.o -c /home/buildbots/llvm-external-buildbots/workers/ppc64le-lld-multistage-test/ppc64le-lld-multistage-test/llvm-project/llvm/lib/Transforms/Vectorize/LoopVectorizationLegality.cpp
/home/buildbots/llvm-external-buildbots/workers/ppc64le-lld-multistage-test/ppc64le-lld-multistage-test/llvm-project/llvm/lib/Transforms/Vectorize/LoopVectorizationLegality.cpp:1682:19: error: variable 'ExitBlock' set but not used [-Werror,-Wunused-but-set-variable]
 1682 |       BasicBlock *ExitBlock;
      |                   ^
1 error generated.
234.825 [4086/25/2521] Building CXX object unittests/IR/CMakeFiles/IRTests.dir/MetadataTest.cpp.o
235.220 [4086/23/2523] Building CXX object lib/CodeGen/GlobalISel/CMakeFiles/LLVMGlobalISel.dir/IRTranslator.cpp.o
235.288 [4086/22/2524] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/ScalarEvolution.cpp.o
235.440 [4086/21/2525] Building CXX object lib/CodeGen/AsmPrinter/CMakeFiles/LLVMAsmPrinter.dir/CodeViewDebug.cpp.o
236.340 [4086/20/2526] Building CXX object lib/CodeGen/AsmPrinter/CMakeFiles/LLVMAsmPrinter.dir/AsmPrinter.cpp.o
237.205 [4086/19/2527] Building CXX object lib/Passes/CMakeFiles/LLVMPasses.dir/StandardInstrumentations.cpp.o
237.611 [4086/18/2528] Building CXX object lib/CodeGen/GlobalISel/CMakeFiles/LLVMGlobalISel.dir/CombinerHelper.cpp.o
238.092 [4086/17/2529] Building CXX object lib/CodeGen/SelectionDAG/CMakeFiles/LLVMSelectionDAG.dir/SelectionDAGBuilder.cpp.o
240.860 [4086/16/2530] Building CXX object lib/Transforms/Vectorize/CMakeFiles/LLVMVectorize.dir/LoopVectorize.cpp.o
242.747 [4086/15/2531] Building CXX object unittests/Transforms/Scalar/CMakeFiles/ScalarTests.dir/LoopPassManagerTest.cpp.o
243.371 [4086/14/2532] Building CXX object unittests/SandboxIR/CMakeFiles/SandboxIRTests.dir/SandboxIRTest.cpp.o
243.982 [4086/13/2533] Building CXX object tools/obj2yaml/CMakeFiles/obj2yaml.dir/elf2yaml.cpp.o
244.836 [4086/12/2534] Building CXX object unittests/IR/CMakeFiles/IRTests.dir/PassBuilderCallbacksTest.cpp.o
245.244 [4086/11/2535] Building CXX object lib/Passes/CMakeFiles/LLVMPasses.dir/PassBuilderPipelines.cpp.o
245.577 [4086/10/2536] Building CXX object unittests/Frontend/CMakeFiles/LLVMFrontendTests.dir/OpenMPDecompositionTest.cpp.o
247.400 [4086/9/2537] Building CXX object lib/CodeGen/SelectionDAG/CMakeFiles/LLVMSelectionDAG.dir/DAGCombiner.cpp.o
248.350 [4086/8/2538] Building CXX object unittests/Frontend/CMakeFiles/LLVMFrontendTests.dir/OpenMPIRBuilderTest.cpp.o
249.005 [4086/7/2539] Building CXX object lib/Transforms/IPO/CMakeFiles/LLVMipo.dir/AttributorAttributes.cpp.o
250.838 [4086/6/2540] Building CXX object lib/Transforms/IPO/CMakeFiles/LLVMipo.dir/OpenMPOpt.cpp.o
256.393 [4086/5/2541] Building CXX object unittests/ADT/CMakeFiles/ADTTests.dir/DenseMapTest.cpp.o
257.141 [4086/4/2542] Building CXX object lib/Transforms/IPO/CMakeFiles/LLVMipo.dir/MemProfContextDisambiguation.cpp.o
289.936 [4086/3/2543] Building CXX object lib/Passes/CMakeFiles/LLVMPasses.dir/PassBuilder.cpp.o
291.578 [4086/2/2544] Building CXX object unittests/ADT/CMakeFiles/ADTTests.dir/SmallVectorTest.cpp.o
298.018 [4086/1/2545] 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/151311