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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_LIBCALL_AA_H
#define LLVM_ANALYSIS_LIBCALL_AA_H
#include "llvm/Analysis/AliasAnalysis.h"
#include "llvm/Pass.h"
namespace llvm {
class LibCallInfo;
struct LibCallFunctionInfo;
/// LibCallAliasAnalysis - Alias analysis driven from LibCallInfo.
struct LibCallAliasAnalysis : public FunctionPass, AliasAnalysis {
static char ID; // Class identification
LibCallInfo *LCI;
explicit LibCallAliasAnalysis(LibCallInfo *LC = 0)
: FunctionPass(&ID), LCI(LC) {
}
explicit LibCallAliasAnalysis(const void *ID, LibCallInfo *LC)
: FunctionPass(ID), LCI(LC) {
}
~LibCallAliasAnalysis();
ModRefResult getModRefInfo(CallSite CS, Value *P, unsigned Size);
ModRefResult getModRefInfo(CallSite CS1, CallSite CS2) {
// TODO: Could compare two direct calls against each other if we cared to.
return AliasAnalysis::getModRefInfo(CS1,CS2);
}
virtual void getAnalysisUsage(AnalysisUsage &AU) const;
virtual bool runOnFunction(Function &F) {
InitializeAliasAnalysis(this); // set up super class
return false;
}
/// hasNoModRefInfoForCalls - We can provide mod/ref information against
/// non-escaping allocations.
virtual bool hasNoModRefInfoForCalls() const { return false; }
private:
ModRefResult AnalyzeLibCallDetails(const LibCallFunctionInfo *FI,
CallSite CS, Value *P, unsigned Size);
};
} // End of llvm namespace
#endif
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