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Expose a public interface to this pass.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52029 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2008-06-05 23:45:18 +00:00
parent 15ccbf59a9
commit 5c490610a1
2 changed files with 73 additions and 40 deletions
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61
include/llvm/Analysis/LibCallAliasAnalysis.h Normal file
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@ -0,0 +1,61 @@
//===- 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;
class 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

52
lib/Analysis/LibCallAliasAnalysis.cpp
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@ -11,52 +11,13 @@
//
//===----------------------------------------------------------------------===//
#include "llvm/Analysis/LibCallAliasAnalysis.h"
#include "llvm/Analysis/Passes.h"
#include "llvm/Analysis/LibCallSemantics.h"
#include "llvm/Function.h"
#include "llvm/Pass.h"
#include "llvm/Target/TargetData.h"
using namespace llvm;
namespace {
/// LibCallAliasAnalysis - Alias analysis driven from LibCallInfo.
struct LibCallAliasAnalysis : public FunctionPass, AliasAnalysis {
static char ID; // Class identification
LibCallInfo *LCI;
explicit LibCallAliasAnalysis(LibCallInfo *LC = 0)
: FunctionPass((intptr_t)&ID), LCI(LC) {
}
~LibCallAliasAnalysis() {
delete LCI;
}
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 {
AliasAnalysis::getAnalysisUsage(AU);
AU.addRequired<TargetData>();
AU.setPreservesAll(); // Does not transform code
}
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 anonymous namespace
// Register this pass...
char LibCallAliasAnalysis::ID = 0;
@ -70,6 +31,17 @@ FunctionPass *llvm::createLibCallAliasAnalysisPass(LibCallInfo *LCI) {
return new LibCallAliasAnalysis(LCI);
}
LibCallAliasAnalysis::~LibCallAliasAnalysis() {
delete LCI;
}
void LibCallAliasAnalysis::getAnalysisUsage(AnalysisUsage &AU) const {
AliasAnalysis::getAnalysisUsage(AU);
AU.addRequired<TargetData>();
AU.setPreservesAll(); // Does not transform code
}
/// AnalyzeLibCallDetails - Given a call to a function with the specified
/// LibCallFunctionInfo, see if we can improve the mod/ref footprint of the call