| //===- 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 |