1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768697071 |
- //===- LibCallAliasAnalysis.h - Implement AliasAnalysis for libcalls ------===//
- //
- // The LLVM Compiler Infrastructure
- //
- // This file is distributed under the University of Illinois Open Source
- // License. See LICENSE.TXT for details.
- //
- //===----------------------------------------------------------------------===//
- //
- // This file defines the LibCallAliasAnalysis class.
- //
- //===----------------------------------------------------------------------===//
- #ifndef LLVM_ANALYSIS_LIBCALLALIASANALYSIS_H
- #define LLVM_ANALYSIS_LIBCALLALIASANALYSIS_H
- #include "llvm/Analysis/AliasAnalysis.h"
- #include "llvm/IR/Module.h"
- #include "llvm/Pass.h"
- namespace llvm {
- class LibCallInfo;
- struct LibCallFunctionInfo;
-
- /// LibCallAliasAnalysis - Alias analysis driven from LibCallInfo.
- struct LibCallAliasAnalysis : public FunctionPass, public AliasAnalysis {
- static char ID; // Class identification
-
- LibCallInfo *LCI;
-
- explicit LibCallAliasAnalysis(LibCallInfo *LC = nullptr)
- : FunctionPass(ID), LCI(LC) {
- initializeLibCallAliasAnalysisPass(*PassRegistry::getPassRegistry());
- }
- explicit LibCallAliasAnalysis(char &ID, LibCallInfo *LC)
- : FunctionPass(ID), LCI(LC) {
- initializeLibCallAliasAnalysisPass(*PassRegistry::getPassRegistry());
- }
- ~LibCallAliasAnalysis() override;
- ModRefResult getModRefInfo(ImmutableCallSite CS,
- const MemoryLocation &Loc) override;
- ModRefResult getModRefInfo(ImmutableCallSite CS1,
- ImmutableCallSite CS2) override {
- // TODO: Could compare two direct calls against each other if we cared to.
- return AliasAnalysis::getModRefInfo(CS1, CS2);
- }
- void getAnalysisUsage(AnalysisUsage &AU) const override;
- bool runOnFunction(Function &F) override;
- /// getAdjustedAnalysisPointer - This method is used when a pass implements
- /// an analysis interface through multiple inheritance. If needed, it
- /// should override this to adjust the this pointer as needed for the
- /// specified pass info.
- void *getAdjustedAnalysisPointer(const void *PI) override {
- if (PI == &AliasAnalysis::ID)
- return (AliasAnalysis*)this;
- return this;
- }
-
- private:
- ModRefResult AnalyzeLibCallDetails(const LibCallFunctionInfo *FI,
- ImmutableCallSite CS,
- const MemoryLocation &Loc);
- };
- } // End of llvm namespace
- #endif
|