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//===- 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();
ModRefResult getModRefInfo(ImmutableCallSite CS,
const Location &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 Location &Loc);
};
} // End of llvm namespace
#endif
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