LLVM: llvm::GlobalMergeFunc Class Reference (original) (raw)

GlobalMergeFunc is a ModulePass that implements a function merging mechanism using stable function hashes. More...

#include "[llvm/CodeGen/GlobalMergeFunctions.h](GlobalMergeFunctions%5F8h%5Fsource.html)"

Public Member Functions
GlobalMergeFunc (const ModuleSummaryIndex *Index)
void initializeMergerMode (const Module &M)
bool run (Module &M)
void analyze (Module &M)
Analyze module to create stable function into LocalFunctionMap.
void emitFunctionMap (Module &M)
Emit LocalFunctionMap into __llvm_merge section.
bool merge (Module &M, const StableFunctionMap *FunctionMap)
Merge functions in the module using the given function map.
Static Public Attributes
static constexpr char MergingInstanceSuffix [] = ".Tgm"
The suffix used to identify the merged function that parameterizes the constant values.

GlobalMergeFunc is a ModulePass that implements a function merging mechanism using stable function hashes.

It identifies and merges functions with matching hashes across modules to optimize binary size.

Definition at line 50 of file GlobalMergeFunctions.h.

◆ analyze()

void GlobalMergeFunc::analyze ( Module & M )

◆ emitFunctionMap()

void GlobalMergeFunc::emitFunctionMap ( Module & M )

◆ initializeMergerMode()

void GlobalMergeFunc::initializeMergerMode ( const Module & M )

◆ merge()

Merge functions in the module using the given function map.

Definition at line 392 of file GlobalMergeFunctions.cpp.

References assert(), llvm::StableFunctionMap::at(), llvm::cast(), Changed, checkConstHashCompatible(), checkConstLocationCompatible(), computeParamInfo(), llvm::StableFunctionMap::contains(), createMergedFunction(), createThunk(), llvm::dbgs(), llvm::Value::dump(), llvm::SmallVectorImpl< T >::emplace_back(), F, llvm::Value::getName(), ignoreOp(), llvm::StableFunctionMap::StableFunctionEntry::IndexOperandHashMap, llvm::StableFunctionMap::StableFunctionEntry::InstCount, isEligibleFunction(), LLVM_DEBUG, llvm::SmallVectorTemplateBase< T, bool >::push_back(), llvm::size(), llvm::SmallVectorTemplateCommon< T, typename >::size(), and llvm::StructuralHashWithDifferences().

Referenced by run().

◆ run()

◆ MergingInstanceSuffix

char llvm::GlobalMergeFunc::MergingInstanceSuffix[] = ".Tgm" staticconstexpr

The suffix used to identify the merged function that parameterizes the constant values.

Note that the original function, without this suffix, becomes a thunk supplying contexts to the merged function via parameters.

Definition at line 61 of file GlobalMergeFunctions.h.

Referenced by createMergedFunction().

The documentation for this class was generated from the following files: