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Re-land: [Analysis] Ensure use of strict fp exceptions in ConstantFolding #137652

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Apr 29, 2025
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Re-land: [Analysis] Ensure use of strict fp exceptions in ConstantFolding #137652

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11 changes: 11 additions & 0 deletions llvm/lib/Analysis/CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -23,6 +23,17 @@ if (DEFINED LLVM_HAVE_TF_AOT OR LLVM_HAVE_TFLITE)
endif()
endif()

# The implementation of ConstantFolding.cpp relies on the use of math functions
# from the host. In particular, it relies on the detection of floating point
# exceptions originating from such math functions to prevent invalid cases
# from being constant folded. Therefore, we must ensure that fp exceptions are
# handled correctly.
if (MSVC)
set_source_files_properties(ConstantFolding.cpp PROPERTIES COMPILE_OPTIONS "/fp:except")
elseif(CMAKE_CXX_COMPILER_ID MATCHES "GNU|Clang")
set_source_files_properties(ConstantFolding.cpp PROPERTIES COMPILE_OPTIONS "-ftrapping-math")
endif()

add_llvm_component_library(LLVMAnalysis
AliasAnalysis.cpp
AliasAnalysisEvaluator.cpp
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