[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 `clang-x86_64-linux-abi-test` running on `sie-linux-worker2` while building `llvm` at step 6 "build-unified-tree".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/8/builds/14612

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

```
Step 6 (build-unified-tree) failure: build (failure)
...
12.619 [5797/10/1372] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/CostModel.cpp.o
12.620 [5796/10/1373] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/CycleAnalysis.cpp.o
12.622 [5795/10/1374] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/CodeMetrics.cpp.o
12.631 [5794/10/1375] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/CtxProfAnalysis.cpp.o
12.634 [5793/10/1376] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/ConstraintSystem.cpp.o
12.645 [5792/10/1377] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/DDG.cpp.o
12.646 [5791/10/1378] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/DDGPrinter.cpp.o
12.647 [5790/10/1379] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/DemandedBits.cpp.o
12.649 [5789/10/1380] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/Delinearization.cpp.o
12.650 [5788/10/1381] 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/abi-test/build/lib/Analysis -I/home/buildbot/buildbot-root/abi-test/llvm/llvm/lib/Analysis -I/home/buildbot/buildbot-root/abi-test/build/include -I/home/buildbot/buildbot-root/abi-test/llvm/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/abi-test/llvm/llvm/lib/Analysis/ConstantFolding.cpp
g++: error: unrecognized command-line option ‘-ffp-exception-behavior=strict’
12.655 [5788/9/1382] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/DependenceAnalysis.cpp.o
12.657 [5788/8/1383] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/DependenceGraphBuilder.cpp.o
12.658 [5788/7/1384] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/DevelopmentModeInlineAdvisor.cpp.o
12.663 [5788/6/1385] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/DomConditionCache.cpp.o
12.670 [5788/5/1386] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/DomPrinter.cpp.o
12.672 [5788/4/1387] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/DomTreeUpdater.cpp.o
16.260 [5788/3/1388] Building AArch64GenInstrInfo.inc...
18.175 [5788/2/1389] Building AMDGPUGenRegBankGICombiner.inc...
23.330 [5788/1/1390] 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