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ebbc4df924
isn't a good level of abstraction for memdep. Instead, generalize AliasAnalysis::alias and related interfaces with a new Location class for describing a memory location. For now, this is the same Pointer and Size as before, plus an additional field for a TBAA tag. Also, introduce a fixed MD_tbaa metadata tag kind. llvm-svn: 113858
72 lines
2.3 KiB
C++
72 lines
2.3 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(char &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(ImmutableCallSite CS,
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const Location &Loc);
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ModRefResult getModRefInfo(ImmutableCallSite CS1,
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ImmutableCallSite 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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/// getAdjustedAnalysisPointer - This method is used when a pass implements
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/// an analysis interface through multiple inheritance. If needed, it
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/// should override this to adjust the this pointer as needed for the
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/// specified pass info.
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virtual void *getAdjustedAnalysisPointer(const void *PI) {
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if (PI == &AliasAnalysis::ID)
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return (AliasAnalysis*)this;
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return this;
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}
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private:
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ModRefResult AnalyzeLibCallDetails(const LibCallFunctionInfo *FI,
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ImmutableCallSite CS,
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const Location &Loc);
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};
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} // End of llvm namespace
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#endif
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