[llvm] [Analysis] Ensure use of strict fp exceptions in ConstantFolding (PR #136139)

Mon Apr 28 02:18:16 PDT 2025

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `llvm-clang-x86_64-gcc-ubuntu` running on `sie-linux-worker3` while building `llvm` at step 5 "build-unified-tree".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/174/builds/16883

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

```
Step 5 (build-unified-tree) failure: build (failure)
...
35.860 [5608/34/1537] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/CGSCCPassManager.cpp.o
35.862 [5607/34/1538] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/CmpInstAnalysis.cpp.o
35.863 [5606/34/1539] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/CallGraph.cpp.o
35.864 [5605/34/1540] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/CallGraphSCCPass.cpp.o
35.865 [5604/34/1541] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/CaptureTracking.cpp.o
35.867 [5603/34/1542] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/CostModel.cpp.o
35.867 [5602/34/1543] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/CFGPrinter.cpp.o
35.869 [5601/34/1544] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/CycleAnalysis.cpp.o
35.871 [5600/34/1545] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/CodeMetrics.cpp.o
35.874 [5599/34/1546] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/ConstantFolding.cpp.o
FAILED: lib/Analysis/CMakeFiles/LLVMAnalysis.dir/ConstantFolding.cpp.o 
/opt/ccache/bin/g++ -DGTEST_HAS_RTTI=0 -DHAS_LOGF128 -D_DEBUG -D_GLIBCXX_ASSERTIONS -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I/home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/build/lib/Analysis -I/home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/llvm-project/llvm/lib/Analysis -I/home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/build/include -I/home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/llvm-project/llvm/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-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 -fdiagnostics-color -ffunction-sections -fdata-sections -O3 -DNDEBUG  -fno-exceptions -funwind-tables -fno-rtti -UNDEBUG -std=c++17 -ffp-exception-behavior=strict -MD -MT lib/Analysis/CMakeFiles/LLVMAnalysis.dir/ConstantFolding.cpp.o -MF lib/Analysis/CMakeFiles/LLVMAnalysis.dir/ConstantFolding.cpp.o.d -o lib/Analysis/CMakeFiles/LLVMAnalysis.dir/ConstantFolding.cpp.o -c /home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/llvm-project/llvm/lib/Analysis/ConstantFolding.cpp
g++: error: unrecognized command line option ‘-ffp-exception-behavior=strict’
35.878 [5599/33/1547] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/CallPrinter.cpp.o
35.882 [5599/32/1548] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/DDG.cpp.o
35.885 [5599/31/1549] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/DDGPrinter.cpp.o
35.885 [5599/30/1550] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/CtxProfAnalysis.cpp.o
35.888 [5599/29/1551] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/DemandedBits.cpp.o
35.891 [5599/28/1552] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/DependenceAnalysis.cpp.o
35.892 [5599/27/1553] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/DependenceGraphBuilder.cpp.o
35.895 [5599/26/1554] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/Delinearization.cpp.o
35.896 [5599/25/1555] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/DomPrinter.cpp.o
35.900 [5599/24/1556] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/DomTreeUpdater.cpp.o
35.900 [5599/23/1557] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/DomConditionCache.cpp.o
35.903 [5599/22/1558] Building CXX object lib/BinaryFormat/CMakeFiles/LLVMBinaryFormat.dir/MsgPackDocument.cpp.o
36.117 [5599/21/1559] Building CXX object unittests/ADT/CMakeFiles/ADTTests.dir/CoalescingBitVectorTest.cpp.o
36.160 [5599/20/1560] Building CXX object lib/BinaryFormat/CMakeFiles/LLVMBinaryFormat.dir/DXContainer.cpp.o
36.258 [5599/19/1561] Building CXX object lib/Transforms/Utils/CMakeFiles/LLVMTransformUtils.dir/Utils.cpp.o
36.327 [5599/18/1562] Building CXX object lib/DWARFLinker/CMakeFiles/LLVMDWARFLinker.dir/DWARFLinkerBase.cpp.o
36.440 [5599/17/1563] Building CXX object lib/BinaryFormat/CMakeFiles/LLVMBinaryFormat.dir/Dwarf.cpp.o
36.624 [5599/16/1564] Building CXX object lib/Transforms/IPO/CMakeFiles/LLVMipo.dir/BarrierNoopPass.cpp.o
36.632 [5599/15/1565] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/DevelopmentModeInlineAdvisor.cpp.o
36.746 [5599/14/1566] Building CXX object lib/Transforms/Vectorize/CMakeFiles/LLVMVectorize.dir/Vectorize.cpp.o
36.880 [5599/13/1567] Building CXX object utils/TableGen/Common/CMakeFiles/obj.LLVMTableGenCommon.dir/GlobalISel/GlobalISelMatchTable.cpp.o
36.928 [5599/12/1568] Building CXX object lib/DWARFLinker/Classic/CMakeFiles/LLVMDWARFLinkerClassic.dir/DWARFLinkerDeclContext.cpp.o
37.053 [5599/11/1569] Building CXX object lib/InterfaceStub/CMakeFiles/LLVMInterfaceStub.dir/ELFObjHandler.cpp.o
37.057 [5599/10/1570] Building CXX object lib/Frontend/OpenMP/CMakeFiles/LLVMFrontendOpenMP.dir/OMPContext.cpp.o
37.060 [5599/9/1571] Building CXX object lib/Transforms/Utils/CMakeFiles/LLVMTransformUtils.dir/ASanStackFrameLayout.cpp.o
37.159 [5599/8/1572] Building CXX object lib/DWARFLinker/Classic/CMakeFiles/LLVMDWARFLinkerClassic.dir/DWARFLinkerCompileUnit.cpp.o
37.259 [5599/7/1573] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/ConstraintSystem.cpp.o
37.648 [5599/6/1574] Building CXX object utils/TableGen/Common/CMakeFiles/obj.LLVMTableGenCommon.dir/CodeGenDAGPatterns.cpp.o
38.186 [5599/5/1575] Building CXX object utils/TableGen/Common/CMakeFiles/obj.LLVMTableGenCommon.dir/CodeGenRegisters.cpp.o
40.370 [5599/4/1576] Building CXX object unittests/ADT/CMakeFiles/ADTTests.dir/BitVectorTest.cpp.o
44.321 [5599/3/1577] Building CXX object unittests/ADT/CMakeFiles/ADTTests.dir/APIntTest.cpp.o
47.961 [5599/2/1578] Building CXX object lib/CodeGen/AsmPrinter/CMakeFiles/LLVMAsmPrinter.dir/AsmPrinter.cpp.o
52.812 [5599/1/1579] Building CXX object unittests/ADT/CMakeFiles/ADTTests.dir/APFloatTest.cpp.o
ninja: build stopped: subcommand failed.

```

</details>

https://github.com/llvm/llvm-project/pull/136139