62 lines
2.0 KiB
C++
62 lines
2.0 KiB
C++
//===- LibCallAliasAnalysis.h - Implement AliasAnalysis for libcalls ------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines the LibCallAliasAnalysis class.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_ANALYSIS_LIBCALL_AA_H
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#define LLVM_ANALYSIS_LIBCALL_AA_H
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#include "llvm/Analysis/AliasAnalysis.h"
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#include "llvm/Pass.h"
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namespace llvm {
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class LibCallInfo;
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struct LibCallFunctionInfo;
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/// LibCallAliasAnalysis - Alias analysis driven from LibCallInfo.
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struct LibCallAliasAnalysis : public FunctionPass, public AliasAnalysis {
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static char ID; // Class identification
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LibCallInfo *LCI;
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explicit LibCallAliasAnalysis(LibCallInfo *LC = 0)
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: FunctionPass(&ID), LCI(LC) {
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}
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explicit LibCallAliasAnalysis(const void *ID, LibCallInfo *LC)
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: FunctionPass(ID), LCI(LC) {
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}
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~LibCallAliasAnalysis();
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ModRefResult getModRefInfo(CallSite CS, Value *P, unsigned Size);
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ModRefResult getModRefInfo(CallSite CS1, CallSite CS2) {
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// TODO: Could compare two direct calls against each other if we cared to.
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return AliasAnalysis::getModRefInfo(CS1,CS2);
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}
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virtual void getAnalysisUsage(AnalysisUsage &AU) const;
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virtual bool runOnFunction(Function &F) {
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InitializeAliasAnalysis(this); // set up super class
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return false;
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}
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/// hasNoModRefInfoForCalls - We can provide mod/ref information against
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/// non-escaping allocations.
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virtual bool hasNoModRefInfoForCalls() const { return false; }
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private:
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ModRefResult AnalyzeLibCallDetails(const LibCallFunctionInfo *FI,
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CallSite CS, Value *P, unsigned Size);
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};
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} // End of llvm namespace
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#endif
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