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Allow setting strict-alias defaults at config time #32

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Allow setting strict-alias defaults at config time #32

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9 changes: 9 additions & 0 deletions enzyme/CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -46,6 +46,15 @@ option(ENZYME_APPLE_DYNAMIC_LOOKUP
option(ENZYME_STATIC_LIB "Build static library" OFF)
option(ENZYME_WARN_COMPILER "Warn if enzyme detects potentially incompatible compiler" ON)
option(ENZYME_ENABLE_REACTANT "Build support library for Reactant C++ frontend" OFF)
option(
ENZYME_DEFAULT_STRICT_ALIASING
"Default -enzyme-strict-aliasing to true"
ON
)
add_compile_definitions(
ENZYME_DEFAULT_STRICT_ALIASING=$<BOOL:${ENZYME_DEFAULT_STRICT_ALIASING}>
)

set(ENZYME_SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR})
set(ENZYME_BINARY_DIR ${CMAKE_CURRENT_BINARY_DIR})
set(Fortran_COMPILER ${CMAKE_Fortran_COMPILER})
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8 changes: 6 additions & 2 deletions enzyme/Enzyme/TypeAnalysis/TypeAnalysis.cpp
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Expand Up @@ -71,6 +71,10 @@

using namespace llvm;

#ifndef ENZYME_DEFAULT_STRICT_ALIASING
#define ENZYME_DEFAULT_STRICT_ALIASING 1
#endif

extern "C" {
/// Maximum offset for type trees to keep
llvm::cl::opt<int> MaxIntOffset("enzyme-max-int-offset", cl::init(100),
Expand All @@ -90,8 +94,8 @@ llvm::cl::opt<bool> RustTypeRules("enzyme-rust-type", cl::init(false),
cl::desc("Enable rust-specific type rules"));

llvm::cl::opt<bool> EnzymeStrictAliasing(
"enzyme-strict-aliasing", cl::init(true), cl::Hidden,
cl::desc("Assume strict aliasing of types / type stability"));
"enzyme-strict-aliasing", cl::init(ENZYME_DEFAULT_STRICT_ALIASING != 0),
cl::Hidden, cl::desc("Assume strict aliasing of types / type stability"));
}

const llvm::StringMap<llvm::Intrinsic::ID> LIBM_FUNCTIONS = {
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