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

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `cross-project-tests-sie-ubuntu-dwarf5` running on `doug-worker-1b` while building `llvm` at step 5 "build-unified-tree".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/163/builds/17995

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

```
Step 5 (build-unified-tree) failure: build (failure)
...
21.962 [3753/8/1429] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/CaptureTracking.cpp.o
21.970 [3752/8/1430] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/CostModel.cpp.o
21.976 [3751/8/1431] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/CodeMetrics.cpp.o
21.984 [3750/8/1432] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/CtxProfAnalysis.cpp.o
21.989 [3749/8/1433] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/CycleAnalysis.cpp.o
21.998 [3748/8/1434] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/DDG.cpp.o
21.999 [3747/8/1435] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/ConstraintSystem.cpp.o
22.005 [3746/8/1436] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/DDGPrinter.cpp.o
22.015 [3745/8/1437] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/Delinearization.cpp.o
22.021 [3744/8/1438] 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/cross-project-tests-sie-ubuntu-dwarf5/build/lib/Analysis -I/home/buildbot/buildbot-root/cross-project-tests-sie-ubuntu-dwarf5/llvm-project/llvm/lib/Analysis -I/home/buildbot/buildbot-root/cross-project-tests-sie-ubuntu-dwarf5/build/include -I/home/buildbot/buildbot-root/cross-project-tests-sie-ubuntu-dwarf5/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/cross-project-tests-sie-ubuntu-dwarf5/llvm-project/llvm/lib/Analysis/ConstantFolding.cpp
g++: error: unrecognized command-line option ‘-ffp-exception-behavior=strict’
22.025 [3744/7/1439] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/DevelopmentModeInlineAdvisor.cpp.o
22.026 [3744/6/1440] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/DemandedBits.cpp.o
22.031 [3744/5/1441] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/DependenceGraphBuilder.cpp.o
22.035 [3744/4/1442] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/DependenceAnalysis.cpp.o
22.042 [3744/3/1443] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/DomConditionCache.cpp.o
23.605 [3744/2/1444] Building X86GenInstrInfo.inc...
36.790 [3744/1/1445] Building CXX object lib/CodeGen/AsmPrinter/CMakeFiles/LLVMAsmPrinter.dir/AsmPrinter.cpp.o
ninja: build stopped: subcommand failed.

```

</details>

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