[llvm] [llvm] Migrate away from ArrayRef(std::nullopt) (NFC) (PR #144967)

Thu Jun 19 22:25:14 PDT 2025

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `flang-aarch64-latest-gcc` running on `linaro-flang-aarch64-latest-gcc` while building `llvm` at step 5 "build-unified-tree".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/130/builds/13831

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

```
Step 5 (build-unified-tree) failure: build (failure)
...
476.302 [729/118/6629] Building CXX object tools/flang/lib/Parser/CMakeFiles/FortranParser.dir/parse-tree.cpp.o
477.020 [729/117/6630] Building CXX object tools/flang/lib/Semantics/CMakeFiles/FortranSemantics.dir/openmp-modifiers.cpp.o
480.211 [729/116/6631] Building CXX object tools/flang/lib/Semantics/CMakeFiles/FortranSemantics.dir/check-stop.cpp.o
480.331 [729/115/6632] Building CXX object tools/flang/lib/Semantics/CMakeFiles/FortranSemantics.dir/openmp-dsa.cpp.o
481.243 [729/114/6633] Building CXX object tools/flang/lib/Semantics/CMakeFiles/FortranSemantics.dir/check-purity.cpp.o
482.545 [729/113/6634] Building CXX object tools/flang/lib/Parser/CMakeFiles/FortranParser.dir/expr-parsers.cpp.o
485.141 [729/112/6635] Building CXX object tools/flang/lib/Evaluate/CMakeFiles/FortranEvaluate.dir/real.cpp.o
492.390 [729/111/6636] Building CXX object tools/flang/lib/Semantics/CMakeFiles/FortranSemantics.dir/compute-offsets.cpp.o
848.671 [729/110/6637] Building CXX object tools/flang/lib/Semantics/CMakeFiles/FortranSemantics.dir/dump-expr.cpp.o
1744.235 [729/109/6638] Building CXX object tools/flang/lib/Evaluate/CMakeFiles/FortranEvaluate.dir/shape.cpp.o
FAILED: tools/flang/lib/Evaluate/CMakeFiles/FortranEvaluate.dir/shape.cpp.o 
/usr/local/bin/c++ -DFLANG_INCLUDE_TESTS=1 -DGTEST_HAS_RTTI=0 -D_DEBUG -D_GLIBCXX_ASSERTIONS -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I/home/tcwg-buildbot/worker/flang-aarch64-latest-gcc/build/tools/flang/lib/Evaluate -I/home/tcwg-buildbot/worker/flang-aarch64-latest-gcc/llvm-project/flang/lib/Evaluate -I/home/tcwg-buildbot/worker/flang-aarch64-latest-gcc/llvm-project/flang/include -I/home/tcwg-buildbot/worker/flang-aarch64-latest-gcc/build/tools/flang/include -I/home/tcwg-buildbot/worker/flang-aarch64-latest-gcc/build/include -I/home/tcwg-buildbot/worker/flang-aarch64-latest-gcc/llvm-project/llvm/include -isystem /home/tcwg-buildbot/worker/flang-aarch64-latest-gcc/llvm-project/flang/../mlir/include -isystem /home/tcwg-buildbot/worker/flang-aarch64-latest-gcc/build/tools/mlir/include -isystem /home/tcwg-buildbot/worker/flang-aarch64-latest-gcc/build/tools/clang/include -isystem /home/tcwg-buildbot/worker/flang-aarch64-latest-gcc/llvm-project/llvm/../clang/include -fPIC -fno-semantic-interposition -fvisibility-inlines-hidden -Werror=date-time -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wno-missing-field-initializers -pedantic -Wno-long-long -Wimplicit-fallthrough -Wno-maybe-uninitialized -Wno-nonnull -Wno-class-memaccess -Wno-redundant-move -Wno-pessimizing-move -Wno-noexcept-type -Wdelete-non-virtual-dtor -Wsuggest-override -Wno-comment -Wno-misleading-indentation -Wctad-maybe-unsupported -fdiagnostics-color -ffunction-sections -fdata-sections -Wno-deprecated-copy -Wno-ctad-maybe-unsupported -fno-strict-aliasing -fno-semantic-interposition -fpch-preprocess -O3 -DNDEBUG -fno-semantic-interposition -std=c++17 -fPIC  -fno-exceptions -funwind-tables -fno-rtti -UNDEBUG -Winvalid-pch -include /home/tcwg-buildbot/worker/flang-aarch64-latest-gcc/build/tools/flang/lib/Evaluate/CMakeFiles/FortranEvaluate.dir/cmake_pch.hxx -MD -MT tools/flang/lib/Evaluate/CMakeFiles/FortranEvaluate.dir/shape.cpp.o -MF tools/flang/lib/Evaluate/CMakeFiles/FortranEvaluate.dir/shape.cpp.o.d -o tools/flang/lib/Evaluate/CMakeFiles/FortranEvaluate.dir/shape.cpp.o -c /home/tcwg-buildbot/worker/flang-aarch64-latest-gcc/llvm-project/flang/lib/Evaluate/shape.cpp
g++-latest: fatal error: Killed signal terminated program cc1plus
compilation terminated.
1752.825 [729/108/6639] Building CXX object tools/flang/lib/Semantics/CMakeFiles/FortranSemantics.dir/check-select-rank.cpp.o
1753.261 [729/107/6640] Building CXX object tools/flang/lib/Semantics/CMakeFiles/FortranSemantics.dir/check-namelist.cpp.o
1753.750 [729/106/6641] Building CXX object tools/flang/lib/Semantics/CMakeFiles/FortranSemantics.dir/attr.cpp.o
1762.895 [729/105/6642] Building CXX object tools/flang/lib/Semantics/CMakeFiles/FortranSemantics.dir/check-if-stmt.cpp.o
1763.271 [729/104/6643] Building CXX object tools/flang/lib/Semantics/CMakeFiles/FortranSemantics.dir/check-arithmeticif.cpp.o
1787.400 [729/103/6644] Building CXX object tools/flang/lib/Semantics/CMakeFiles/FortranSemantics.dir/check-nullify.cpp.o
1792.613 [729/102/6645] Building CXX object tools/flang/lib/Semantics/CMakeFiles/FortranSemantics.dir/check-select-type.cpp.o
1799.170 [729/101/6646] Building CXX object tools/flang/lib/Semantics/CMakeFiles/FortranSemantics.dir/definable.cpp.o
1801.328 [729/100/6647] Building CXX object tools/flang/lib/Evaluate/CMakeFiles/FortranEvaluate.dir/initial-image.cpp.o
1801.417 [729/99/6648] Building CXX object tools/flang/lib/Evaluate/CMakeFiles/FortranEvaluate.dir/fold-designator.cpp.o
1801.903 [729/98/6649] Building CXX object tools/flang/lib/Frontend/CMakeFiles/flangFrontend.dir/TextDiagnosticPrinter.cpp.o
1802.167 [729/97/6650] Building CXX object tools/flang/lib/Evaluate/CMakeFiles/FortranEvaluate.dir/intrinsics-library.cpp.o
1804.785 [729/96/6651] Building CXX object tools/flang/lib/Parser/CMakeFiles/FortranParser.dir/openacc-parsers.cpp.o
1806.115 [729/95/6652] Building CXX object tools/flang/lib/Frontend/CMakeFiles/flangFrontend.dir/TextDiagnosticBuffer.cpp.o
1810.622 [729/94/6653] Building CXX object tools/flang/lib/Semantics/CMakeFiles/FortranSemantics.dir/pointer-assignment.cpp.o
1811.086 [729/93/6654] Building CXX object tools/flang/lib/Evaluate/CMakeFiles/FortranEvaluate.dir/variable.cpp.o
1811.463 [729/92/6655] Building CXX object tools/flang/lib/Parser/CMakeFiles/FortranParser.dir/program-parsers.cpp.o
1811.710 [729/91/6656] Building CXX object tools/flang/lib/Frontend/CMakeFiles/flangFrontend.dir/FrontendOptions.cpp.o
1813.841 [729/90/6657] Building CXX object tools/flang/lib/Semantics/CMakeFiles/FortranSemantics.dir/tools.cpp.o
1814.410 [729/89/6658] Building CXX object tools/flang/lib/Semantics/CMakeFiles/FortranSemantics.dir/type.cpp.o
1815.588 [729/88/6659] Building CXX object tools/flang/lib/Evaluate/CMakeFiles/FortranEvaluate.dir/type.cpp.o
1816.622 [729/87/6660] Building CXX object tools/flang/lib/Semantics/CMakeFiles/FortranSemantics.dir/check-deallocate.cpp.o
1817.286 [729/86/6661] Building CXX object tools/flang/lib/Parser/CMakeFiles/FortranParser.dir/io-parsers.cpp.o
1818.712 [729/85/6662] Building CXX object tools/flang/lib/Lower/CMakeFiles/FortranLower.dir/LoweringOptions.cpp.o
1819.825 [729/84/6663] Building CXX object tools/flang/lib/Lower/CMakeFiles/FortranLower.dir/ComponentPath.cpp.o
1822.159 [729/83/6664] Building CXX object tools/flang/lib/Semantics/CMakeFiles/FortranSemantics.dir/canonicalize-directives.cpp.o
1823.167 [729/82/6665] Building CXX object tools/flang/lib/Evaluate/CMakeFiles/FortranEvaluate.dir/fold-reduction.cpp.o
1824.821 [729/81/6666] Building CXX object tools/flang/lib/Semantics/CMakeFiles/FortranSemantics.dir/rewrite-parse-tree.cpp.o
1824.831 [729/80/6667] Building CXX object tools/flang/lib/Frontend/CMakeFiles/flangFrontend.dir/CodeGenOptions.cpp.o
1825.231 [729/79/6668] Building CXX object tools/flang/lib/Frontend/CMakeFiles/flangFrontend.dir/CompilerInvocation.cpp.o
1826.062 [729/78/6669] Building CXX object tools/flang/lib/Semantics/CMakeFiles/FortranSemantics.dir/check-acc-structure.cpp.o
1826.423 [729/77/6670] Building CXX object tools/flang/lib/Evaluate/CMakeFiles/FortranEvaluate.dir/formatting.cpp.o
1827.996 [729/76/6671] Building CXX object tools/flang/lib/Evaluate/CMakeFiles/FortranEvaluate.dir/intrinsics.cpp.o
1829.419 [729/75/6672] Building CXX object tools/flang/lib/Lower/CMakeFiles/FortranLower.dir/IterationSpace.cpp.o
1829.905 [729/74/6673] Building CXX object tools/flang/lib/Semantics/CMakeFiles/FortranSemantics.dir/assignment.cpp.o

```

</details>

https://github.com/llvm/llvm-project/pull/144967