//
//===----------------------------------------------------------------------===//
-#ifndef LLVM_PASS_ANALYSIS_SUPPORT_H
-#define LLVM_PASS_ANALYSIS_SUPPORT_H
+#ifndef LLVM_PASSANALYSISSUPPORT_H
+#define LLVM_PASSANALYSISSUPPORT_H
-#include <vector>
-#include "llvm/Pass.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/StringRef.h"
+#include "llvm/Pass.h"
+#include <vector>
namespace llvm {
-class StringRef;
-
//===----------------------------------------------------------------------===//
-// AnalysisUsage - Represent the analysis usage information of a pass. This
-// tracks analyses that the pass REQUIRES (must be available when the pass
-// runs), REQUIRES TRANSITIVE (must be available throughout the lifetime of the
-// pass), and analyses that the pass PRESERVES (the pass does not invalidate the
-// results of these analyses). This information is provided by a pass to the
-// Pass infrastructure through the getAnalysisUsage virtual function.
-//
+/// Represent the analysis usage information of a pass. This tracks analyses
+/// that the pass REQUIRES (must be available when the pass runs), REQUIRES
+/// TRANSITIVE (must be available throughout the lifetime of the pass), and
+/// analyses that the pass PRESERVES (the pass does not invalidate the results
+/// of these analyses). This information is provided by a pass to the Pass
+/// infrastructure through the getAnalysisUsage virtual function.
+///
class AnalysisUsage {
public:
typedef SmallVector<AnalysisID, 32> VectorType;
private:
- // Sets of analyses required and preserved by a pass
+ /// Sets of analyses required and preserved by a pass
VectorType Required, RequiredTransitive, Preserved;
bool PreservesAll;
public:
AnalysisUsage() : PreservesAll(false) {}
- // addRequired - Add the specified ID to the required set of the usage info
- // for a pass.
- //
- AnalysisUsage &addRequiredID(AnalysisID ID) {
- assert(ID && "Pass class not registered!");
- Required.push_back(ID);
- return *this;
- }
+ ///@{
+ /// Add the specified ID to the required set of the usage info for a pass.
+ AnalysisUsage &addRequiredID(const void *ID);
+ AnalysisUsage &addRequiredID(char &ID);
template<class PassClass>
AnalysisUsage &addRequired() {
- return addRequiredID(Pass::getClassPassInfo<PassClass>());
+ return addRequiredID(PassClass::ID);
}
- AnalysisUsage &addRequiredTransitiveID(AnalysisID ID) {
- assert(ID && "Pass class not registered!");
- Required.push_back(ID);
- RequiredTransitive.push_back(ID);
- return *this;
- }
+ AnalysisUsage &addRequiredTransitiveID(char &ID);
template<class PassClass>
AnalysisUsage &addRequiredTransitive() {
- AnalysisID ID = Pass::getClassPassInfo<PassClass>();
- return addRequiredTransitiveID(ID);
+ return addRequiredTransitiveID(PassClass::ID);
}
+ ///@}
- // addPreserved - Add the specified ID to the set of analyses preserved by
- // this pass
- //
- AnalysisUsage &addPreservedID(AnalysisID ID) {
+ ///@{
+ /// Add the specified ID to the set of analyses preserved by this pass.
+ AnalysisUsage &addPreservedID(const void *ID) {
Preserved.push_back(ID);
return *this;
}
-
- // addPreserved - Add the specified Pass class to the set of analyses
- // preserved by this pass.
- //
+ AnalysisUsage &addPreservedID(char &ID) {
+ Preserved.push_back(&ID);
+ return *this;
+ }
+ /// Add the specified Pass class to the set of analyses preserved by this pass.
template<class PassClass>
AnalysisUsage &addPreserved() {
- assert(Pass::getClassPassInfo<PassClass>() && "Pass class not registered!");
- Preserved.push_back(Pass::getClassPassInfo<PassClass>());
+ Preserved.push_back(&PassClass::ID);
return *this;
}
+ ///@}
- // addPreserved - Add the Pass with the specified argument string to the set
- // of analyses preserved by this pass. If no such Pass exists, do nothing.
- // This can be useful when a pass is trivially preserved, but may not be
- // linked in. Be careful about spelling!
- //
- AnalysisUsage &addPreserved(StringRef Arg) {
- const PassInfo *PI = Pass::lookupPassInfo(Arg);
- // If the pass exists, preserve it. Otherwise silently do nothing.
- if (PI) Preserved.push_back(PI);
- return *this;
- }
+ /// Add the Pass with the specified argument string to the set of analyses
+ /// preserved by this pass. If no such Pass exists, do nothing. This can be
+ /// useful when a pass is trivially preserved, but may not be linked in. Be
+ /// careful about spelling!
+ AnalysisUsage &addPreserved(StringRef Arg);
- // setPreservesAll - Set by analyses that do not transform their input at all
+ /// Set by analyses that do not transform their input at all
void setPreservesAll() { PreservesAll = true; }
+
+ /// Determine whether a pass said it does not transform its input at all
bool getPreservesAll() const { return PreservesAll; }
- /// setPreservesCFG - This function should be called by the pass, iff they do
- /// not:
+ /// This function should be called by the pass, iff they do not:
///
/// 1. Add or remove basic blocks from the function
/// 2. Modify terminator instructions in any way.
};
//===----------------------------------------------------------------------===//
-// AnalysisResolver - Simple interface used by Pass objects to pull all
-// analysis information out of pass manager that is responsible to manage
-// the pass.
-//
+/// AnalysisResolver - Simple interface used by Pass objects to pull all
+/// analysis information out of pass manager that is responsible to manage
+/// the pass.
+///
class PMDataManager;
class AnalysisResolver {
private:
- AnalysisResolver(); // DO NOT IMPLEMENT
+ AnalysisResolver() = delete;
public:
explicit AnalysisResolver(PMDataManager &P) : PM(P) { }
-
+
inline PMDataManager &getPMDataManager() { return PM; }
- // Find pass that is implementing PI.
- Pass *findImplPass(const PassInfo *PI) {
- Pass *ResultPass = 0;
+ /// Find pass that is implementing PI.
+ Pass *findImplPass(AnalysisID PI) {
+ Pass *ResultPass = nullptr;
for (unsigned i = 0; i < AnalysisImpls.size() ; ++i) {
if (AnalysisImpls[i].first == PI) {
ResultPass = AnalysisImpls[i].second;
return ResultPass;
}
- // Find pass that is implementing PI. Initialize pass for Function F.
- Pass *findImplPass(Pass *P, const PassInfo *PI, Function &F);
+ /// Find pass that is implementing PI. Initialize pass for Function F.
+ Pass *findImplPass(Pass *P, AnalysisID PI, Function &F);
- void addAnalysisImplsPair(const PassInfo *PI, Pass *P) {
- std::pair<const PassInfo*, Pass*> pir = std::make_pair(PI,P);
+ void addAnalysisImplsPair(AnalysisID PI, Pass *P) {
+ if (findImplPass(PI) == P)
+ return;
+ std::pair<AnalysisID, Pass*> pir = std::make_pair(PI,P);
AnalysisImpls.push_back(pir);
}
- /// clearAnalysisImpls - Clear cache that is used to connect a pass to the
- /// the analysis (PassInfo).
+ /// Clear cache that is used to connect a pass to the the analysis (PassInfo).
void clearAnalysisImpls() {
AnalysisImpls.clear();
}
- // getAnalysisIfAvailable - Return analysis result or null if it doesn't exist
+ /// Return analysis result or null if it doesn't exist.
Pass *getAnalysisIfAvailable(AnalysisID ID, bool Direction) const;
- // AnalysisImpls - This keeps track of which passes implements the interfaces
- // that are required by the current pass (to implement getAnalysis()).
- std::vector<std::pair<const PassInfo*, Pass*> > AnalysisImpls;
-
private:
- // PassManager that is used to resolve analysis info
+ /// This keeps track of which passes implements the interfaces that are
+ /// required by the current pass (to implement getAnalysis()).
+ std::vector<std::pair<AnalysisID, Pass*> > AnalysisImpls;
+
+ /// PassManager that is used to resolve analysis info
PMDataManager &PM;
};
AnalysisType *Pass::getAnalysisIfAvailable() const {
assert(Resolver && "Pass not resident in a PassManager object!");
- const PassInfo *PI = getClassPassInfo<AnalysisType>();
- if (PI == 0) return 0;
- return dynamic_cast<AnalysisType*>
- (Resolver->getAnalysisIfAvailable(PI, true));
+ const void *PI = &AnalysisType::ID;
+
+ Pass *ResultPass = Resolver->getAnalysisIfAvailable(PI, true);
+ if (!ResultPass) return nullptr;
+
+ // Because the AnalysisType may not be a subclass of pass (for
+ // AnalysisGroups), we use getAdjustedAnalysisPointer here to potentially
+ // adjust the return pointer (because the class may multiply inherit, once
+ // from pass, once from AnalysisType).
+ return (AnalysisType*)ResultPass->getAdjustedAnalysisPointer(PI);
}
/// getAnalysis<AnalysisType>() - This function is used by subclasses to get
///
template<typename AnalysisType>
AnalysisType &Pass::getAnalysis() const {
- assert(Resolver &&"Pass has not been inserted into a PassManager object!");
-
- return getAnalysisID<AnalysisType>(getClassPassInfo<AnalysisType>());
+ assert(Resolver && "Pass has not been inserted into a PassManager object!");
+ return getAnalysisID<AnalysisType>(&AnalysisType::ID);
}
template<typename AnalysisType>
-AnalysisType &Pass::getAnalysisID(const PassInfo *PI) const {
+AnalysisType &Pass::getAnalysisID(AnalysisID PI) const {
assert(PI && "getAnalysis for unregistered pass!");
assert(Resolver&&"Pass has not been inserted into a PassManager object!");
// PI *must* appear in AnalysisImpls. Because the number of passes used
"'required' by pass!");
// Because the AnalysisType may not be a subclass of pass (for
- // AnalysisGroups), we must use dynamic_cast here to potentially adjust the
- // return pointer (because the class may multiply inherit, once from pass,
- // once from AnalysisType).
- //
- AnalysisType *Result = dynamic_cast<AnalysisType*>(ResultPass);
- assert(Result && "Pass does not implement interface required!");
- return *Result;
+ // AnalysisGroups), we use getAdjustedAnalysisPointer here to potentially
+ // adjust the return pointer (because the class may multiply inherit, once
+ // from pass, once from AnalysisType).
+ return *(AnalysisType*)ResultPass->getAdjustedAnalysisPointer(PI);
}
/// getAnalysis<AnalysisType>() - This function is used by subclasses to get
AnalysisType &Pass::getAnalysis(Function &F) {
assert(Resolver &&"Pass has not been inserted into a PassManager object!");
- return getAnalysisID<AnalysisType>(getClassPassInfo<AnalysisType>(), F);
+ return getAnalysisID<AnalysisType>(&AnalysisType::ID, F);
}
template<typename AnalysisType>
-AnalysisType &Pass::getAnalysisID(const PassInfo *PI, Function &F) {
+AnalysisType &Pass::getAnalysisID(AnalysisID PI, Function &F) {
assert(PI && "getAnalysis for unregistered pass!");
assert(Resolver && "Pass has not been inserted into a PassManager object!");
// PI *must* appear in AnalysisImpls. Because the number of passes used
// should be a small number, we just do a linear search over a (dense)
// vector.
Pass *ResultPass = Resolver->findImplPass(this, PI, F);
- assert (ResultPass && "Unable to find requested analysis info");
-
+ assert(ResultPass && "Unable to find requested analysis info");
+
// Because the AnalysisType may not be a subclass of pass (for
- // AnalysisGroups), we must use dynamic_cast here to potentially adjust the
- // return pointer (because the class may multiply inherit, once from pass,
- // once from AnalysisType).
- //
- AnalysisType *Result = dynamic_cast<AnalysisType*>(ResultPass);
- assert(Result && "Pass does not implement interface required!");
- return *Result;
+ // AnalysisGroups), we use getAdjustedAnalysisPointer here to potentially
+ // adjust the return pointer (because the class may multiply inherit, once
+ // from pass, once from AnalysisType).
+ return *(AnalysisType*)ResultPass->getAdjustedAnalysisPointer(PI);
}
} // End llvm namespace
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