mirror of
https://github.com/RPCSX/llvm.git
synced 2024-12-05 02:16:46 +00:00
844731a7f1
several things that were neither in an anonymous namespace nor static but not intended to be global. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51017 91177308-0d34-0410-b5e6-96231b3b80d8
133 lines
4.7 KiB
C++
133 lines
4.7 KiB
C++
//===- AliasDebugger.cpp - Simple Alias Analysis Use Checker --------------===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This simple pass checks alias analysis users to ensure that if they
|
|
// create a new value, they do not query AA without informing it of the value.
|
|
// It acts as a shim over any other AA pass you want.
|
|
//
|
|
// Yes keeping track of every value in the program is expensive, but this is
|
|
// a debugging pass.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "llvm/Analysis/Passes.h"
|
|
#include "llvm/Module.h"
|
|
#include "llvm/Pass.h"
|
|
#include "llvm/Instructions.h"
|
|
#include "llvm/Constants.h"
|
|
#include "llvm/DerivedTypes.h"
|
|
#include "llvm/Analysis/AliasAnalysis.h"
|
|
#include "llvm/Support/Compiler.h"
|
|
#include <set>
|
|
using namespace llvm;
|
|
|
|
namespace {
|
|
|
|
class VISIBILITY_HIDDEN AliasDebugger
|
|
: public ModulePass, public AliasAnalysis {
|
|
|
|
//What we do is simple. Keep track of every value the AA could
|
|
//know about, and verify that queries are one of those.
|
|
//A query to a value that didn't exist when the AA was created
|
|
//means someone forgot to update the AA when creating new values
|
|
|
|
std::set<const Value*> Vals;
|
|
|
|
public:
|
|
static char ID; // Class identification, replacement for typeinfo
|
|
AliasDebugger() : ModulePass((intptr_t)&ID) {}
|
|
|
|
bool runOnModule(Module &M) {
|
|
InitializeAliasAnalysis(this); // set up super class
|
|
|
|
for(Module::global_iterator I = M.global_begin(),
|
|
E = M.global_end(); I != E; ++I)
|
|
Vals.insert(&*I);
|
|
|
|
for(Module::iterator I = M.begin(),
|
|
E = M.end(); I != E; ++I){
|
|
Vals.insert(&*I);
|
|
if(!I->isDeclaration()) {
|
|
for (Function::arg_iterator AI = I->arg_begin(), AE = I->arg_end();
|
|
AI != AE; ++AI)
|
|
Vals.insert(&*AI);
|
|
for (Function::const_iterator FI = I->begin(), FE = I->end();
|
|
FI != FE; ++FI)
|
|
for (BasicBlock::const_iterator BI = FI->begin(), BE = FI->end();
|
|
BI != BE; ++BI)
|
|
Vals.insert(&*BI);
|
|
}
|
|
|
|
}
|
|
return false;
|
|
}
|
|
|
|
virtual void getAnalysisUsage(AnalysisUsage &AU) const {
|
|
AliasAnalysis::getAnalysisUsage(AU);
|
|
AU.setPreservesAll(); // Does not transform code
|
|
}
|
|
|
|
//------------------------------------------------
|
|
// Implement the AliasAnalysis API
|
|
//
|
|
AliasResult alias(const Value *V1, unsigned V1Size,
|
|
const Value *V2, unsigned V2Size) {
|
|
assert(Vals.find(V1) != Vals.end() && "Never seen value in AA before");
|
|
assert(Vals.find(V2) != Vals.end() && "Never seen value in AA before");
|
|
return AliasAnalysis::alias(V1, V1Size, V2, V2Size);
|
|
}
|
|
|
|
ModRefResult getModRefInfo(CallSite CS, Value *P, unsigned Size) {
|
|
assert(Vals.find(P) != Vals.end() && "Never seen value in AA before");
|
|
return AliasAnalysis::getModRefInfo(CS, P, Size);
|
|
}
|
|
|
|
ModRefResult getModRefInfo(CallSite CS1, CallSite CS2) {
|
|
return AliasAnalysis::getModRefInfo(CS1,CS2);
|
|
}
|
|
|
|
void getMustAliases(Value *P, std::vector<Value*> &RetVals) {
|
|
assert(Vals.find(P) != Vals.end() && "Never seen value in AA before");
|
|
return AliasAnalysis::getMustAliases(P, RetVals);
|
|
}
|
|
|
|
bool pointsToConstantMemory(const Value *P) {
|
|
assert(Vals.find(P) != Vals.end() && "Never seen value in AA before");
|
|
return AliasAnalysis::pointsToConstantMemory(P);
|
|
}
|
|
|
|
/// getModRefBehavior - Return the behavior of the specified function if
|
|
/// called from the specified call site. The call site may be null in which
|
|
/// case the most generic behavior of this function should be returned.
|
|
virtual ModRefBehavior getModRefBehavior(Function *F, CallSite CS,
|
|
std::vector<PointerAccessInfo> *Info) {
|
|
assert(Vals.find(F) != Vals.end() && "Never seen value in AA before");
|
|
return AliasAnalysis::getModRefBehavior(F, CS, Info);
|
|
}
|
|
|
|
virtual void deleteValue(Value *V) {
|
|
assert(Vals.find(V) != Vals.end() && "Never seen value in AA before");
|
|
AliasAnalysis::deleteValue(V);
|
|
}
|
|
virtual void copyValue(Value *From, Value *To) {
|
|
Vals.insert(To);
|
|
AliasAnalysis::copyValue(From, To);
|
|
}
|
|
|
|
};
|
|
}
|
|
|
|
char AliasDebugger::ID = 0;
|
|
static RegisterPass<AliasDebugger>
|
|
X("debug-aa", "AA use debugger", false, true);
|
|
static RegisterAnalysisGroup<AliasAnalysis> Y(X);
|
|
|
|
Pass *llvm::createAliasDebugger() { return new AliasDebugger(); }
|
|
|