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

Mon Apr 28 03:27:25 PDT 2025

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `lld-x86_64-ubuntu-fast` running on `as-builder-4` while building `llvm` at step 5 "build-unified-tree".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/33/builds/15568

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

```
Step 5 (build-unified-tree) failure: build (failure)
...
8.054 [2429/64/1465] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/MemoryLocation.cpp.o
8.054 [2428/64/1466] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/MemoryProfileInfo.cpp.o
8.055 [2427/64/1467] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/ModelUnderTrainingRunner.cpp.o
8.056 [2426/64/1468] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/MemorySSA.cpp.o
8.057 [2425/64/1469] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/MemorySSAUpdater.cpp.o
8.058 [2424/64/1470] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/ModuleDebugInfoPrinter.cpp.o
8.059 [2423/64/1471] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/MustExecute.cpp.o
8.060 [2422/64/1472] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/NoInferenceModelRunner.cpp.o
8.061 [2421/64/1473] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/ObjCARCAliasAnalysis.cpp.o
8.061 [2420/64/1474] 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/c++ -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/worker/as-builder-4/ramdisk/lld-x86_64/build/lib/Analysis -I/home/buildbot/worker/as-builder-4/ramdisk/lld-x86_64/llvm-project/llvm/lib/Analysis -I/home/buildbot/worker/as-builder-4/ramdisk/lld-x86_64/build/include -I/home/buildbot/worker/as-builder-4/ramdisk/lld-x86_64/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/worker/as-builder-4/ramdisk/lld-x86_64/llvm-project/llvm/lib/Analysis/ConstantFolding.cpp
c++: error: unrecognized command-line option ‘-ffp-exception-behavior=strict’
8.062 [2420/63/1475] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/ModuleSummaryAnalysis.cpp.o
8.062 [2420/62/1476] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/ObjCARCAnalysisUtils.cpp.o
8.063 [2420/61/1477] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/ObjCARCInstKind.cpp.o
8.063 [2420/60/1478] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/OptimizationRemarkEmitter.cpp.o
8.063 [2420/59/1479] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/OverflowInstAnalysis.cpp.o
8.064 [2420/58/1480] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/PostDominators.cpp.o
8.065 [2420/57/1481] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/PHITransAddr.cpp.o
8.066 [2420/56/1482] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/PhiValues.cpp.o
8.066 [2420/55/1483] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/PtrUseVisitor.cpp.o
8.069 [2420/54/1484] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/ProfileSummaryInfo.cpp.o
8.069 [2420/53/1485] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/RegionPass.cpp.o
8.072 [2420/52/1486] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/RegionInfo.cpp.o
8.073 [2420/51/1487] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/ReplayInlineAdvisor.cpp.o
8.073 [2420/50/1488] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/RegionPrinter.cpp.o
8.074 [2420/49/1489] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/ScalarEvolutionDivision.cpp.o
8.074 [2420/48/1490] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/ScalarEvolutionAliasAnalysis.cpp.o
8.077 [2420/47/1491] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/ScalarEvolutionNormalization.cpp.o
8.078 [2420/46/1492] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/StaticDataProfileInfo.cpp.o
8.078 [2420/45/1493] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/StackLifetime.cpp.o
8.080 [2420/44/1494] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/ScalarEvolution.cpp.o
8.164 [2420/43/1495] Building PPCGenFastISel.inc...
8.183 [2420/42/1496] Building X86GenInstrMapping.inc...
8.308 [2420/41/1497] Building PPCGenGlobalISel.inc...
8.464 [2420/40/1498] Building PPCGenDAGISel.inc...
9.029 [2420/39/1499] Building RISCVGenMCPseudoLowering.inc...
9.105 [2420/38/1500] Building RISCVGenMacroFusion.inc...
9.280 [2420/37/1501] Building AArch64GenDAGISel.inc...
9.372 [2420/36/1502] Building RISCVGenExegesis.inc...
9.376 [2420/35/1503] Building RISCVGenRegisterBank.inc...
9.424 [2420/34/1504] Building RISCVGenPostLegalizeGICombiner.inc...
9.547 [2420/33/1505] Building RISCVGenDisassemblerTables.inc...
9.568 [2420/32/1506] Building RISCVGenMCCodeEmitter.inc...
9.712 [2420/31/1507] Building RISCVGenAsmMatcher.inc...
9.730 [2420/30/1508] Building RISCVGenCompressInstEmitter.inc...
9.902 [2420/29/1509] Building RISCVGenRegisterInfo.inc...
9.907 [2420/28/1510] Building RISCVGenO0PreLegalizeGICombiner.inc...

```

</details>

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