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

Mon Apr 28 02:15:57 PDT 2025

llvm-ci wrote:

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

Full details are available at: https://lab.llvm.org/buildbot/#/builders/144/builds/23770

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

```
Step 5 (build-unified-tree) failure: build (failure)
...
5.303 [1985/40/2752] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/ImportedFunctionsInliningStatistics.cpp.o
5.304 [1984/40/2753] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/IndirectCallPromotionAnalysis.cpp.o
5.304 [1983/40/2754] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/InlineCost.cpp.o
5.306 [1982/40/2755] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/InlineAdvisor.cpp.o
5.308 [1981/40/2756] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/InlineOrder.cpp.o
5.309 [1980/40/2757] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/InlineSizeEstimatorAnalysis.cpp.o
5.309 [1979/40/2758] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/InstCount.cpp.o
5.310 [1978/40/2759] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/InstructionPrecedenceTracking.cpp.o
5.311 [1977/40/2760] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/InteractiveModelRunner.cpp.o
5.312 [1976/40/2761] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/ConstantFolding.cpp.o
FAILED: lib/Analysis/CMakeFiles/LLVMAnalysis.dir/ConstantFolding.cpp.o 
CCACHE_CPP2=yes CCACHE_HASHDIR=yes CCACHE_SLOPPINESS=pch_defines,time_macros /usr/bin/ccache /usr/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-sie-ubuntu-fast/build/lib/Analysis -I/home/buildbot/buildbot-root/llvm-clang-x86_64-sie-ubuntu-fast/llvm-project/llvm/lib/Analysis -I/home/buildbot/buildbot-root/llvm-clang-x86_64-sie-ubuntu-fast/build/include -I/home/buildbot/buildbot-root/llvm-clang-x86_64-sie-ubuntu-fast/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 -Wctad-maybe-unsupported -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-sie-ubuntu-fast/llvm-project/llvm/lib/Analysis/ConstantFolding.cpp
g++: error: unrecognized command-line option ‘-ffp-exception-behavior=strict’
5.312 [1976/39/2762] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/InstructionSimplify.cpp.o
5.312 [1976/38/2763] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/KernelInfo.cpp.o
5.313 [1976/37/2764] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/LastRunTrackingAnalysis.cpp.o
5.313 [1976/36/2765] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/LazyBranchProbabilityInfo.cpp.o
5.313 [1976/35/2766] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/LazyBlockFrequencyInfo.cpp.o
5.314 [1976/34/2767] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/LazyCallGraph.cpp.o
5.314 [1976/33/2768] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/LazyValueInfo.cpp.o
5.315 [1976/32/2769] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/Local.cpp.o
5.315 [1976/31/2770] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/Lint.cpp.o
5.315 [1976/30/2771] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/LoopAnalysisManager.cpp.o
5.316 [1976/29/2772] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/Loads.cpp.o
5.316 [1976/28/2773] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/LoopNestAnalysis.cpp.o
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5.317 [1976/26/2775] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/LoopUnrollAnalyzer.cpp.o
5.317 [1976/25/2776] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/LoopAccessAnalysis.cpp.o
5.318 [1976/24/2777] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/ModelUnderTrainingRunner.cpp.o
5.318 [1976/23/2778] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/LoopPass.cpp.o
5.318 [1976/22/2779] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/MemDerefPrinter.cpp.o
5.319 [1976/21/2780] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/LoopInfo.cpp.o
5.320 [1976/20/2781] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/MemoryProfileInfo.cpp.o
5.321 [1976/19/2782] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/MemoryDependenceAnalysis.cpp.o
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5.322 [1976/17/2784] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/MemoryLocation.cpp.o
5.323 [1976/16/2785] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/MemorySSAUpdater.cpp.o
5.323 [1976/15/2786] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/NoInferenceModelRunner.cpp.o
5.326 [1976/14/2787] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/MLInlineAdvisor.cpp.o
5.326 [1976/13/2788] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/ModuleDebugInfoPrinter.cpp.o
5.327 [1976/12/2789] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/ModuleSummaryAnalysis.cpp.o
5.327 [1976/11/2790] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/MustExecute.cpp.o
5.328 [1976/10/2791] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/MemorySSA.cpp.o
5.328 [1976/9/2792] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/ObjCARCAliasAnalysis.cpp.o
5.328 [1976/8/2793] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/ObjCARCAnalysisUtils.cpp.o
5.598 [1976/7/2794] Building X86GenFastISel.inc...
5.835 [1976/6/2795] Building X86GenGlobalISel.inc...
7.150 [1976/5/2796] Building X86GenDAGISel.inc...
7.153 [1976/4/2797] Building CXX object tools/clang/lib/Driver/CMakeFiles/obj.clangDriver.dir/ToolChains/HIPUtility.cpp.o

```

</details>

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