-//===- llvm/PassAnalysisSupport.h - Analysis Pass Support code ---*- C++ -*-==//
+//===- llvm/PassAnalysisSupport.h - Analysis Pass Support code --*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file was developed by the LLVM research group and is distributed under
+// the University of Illinois Open Source License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
//
// This file defines stuff that is used to define and "use" Analysis Passes.
// This file is automatically #included by Pass.h, so:
#ifndef LLVM_PASS_ANALYSIS_SUPPORT_H
#define LLVM_PASS_ANALYSIS_SUPPORT_H
-// No need to include Pass.h, we are being included by it!
+#include <vector>
+namespace llvm {
+// No need to include Pass.h, we are being included by it!
//===----------------------------------------------------------------------===//
// AnalysisUsage - Represent the analysis usage information of a pass. This
-// tracks analyses that the pass REQUIRES (must available when the pass runs),
-// and analyses that the pass PRESERVES (the pass does not invalidate the
+// 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 {
// Sets of analyses required and preserved by a pass
- std::vector<AnalysisID> Required, Preserved;
+ std::vector<AnalysisID> 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.
//
}
template<class PassClass>
AnalysisUsage &addRequired() {
- Required.push_back(PassClass::ID);
+ assert(Pass::getClassPassInfo<PassClass>() && "Pass class not registered!");
+ Required.push_back(Pass::getClassPassInfo<PassClass>());
+ return *this;
+ }
+
+ template<class PassClass>
+ AnalysisUsage &addRequiredTransitive() {
+ AnalysisID ID = Pass::getClassPassInfo<PassClass>();
+ assert(ID && "Pass class not registered!");
+ Required.push_back(ID);
+ RequiredTransitive.push_back(ID);
return *this;
}
template<class PassClass>
AnalysisUsage &addPreserved() {
- Preserved.push_back(PassClass::ID);
+ assert(Pass::getClassPassInfo<PassClass>() && "Pass class not registered!");
+ Preserved.push_back(Pass::getClassPassInfo<PassClass>());
return *this;
}
// setPreservesAll - Set by analyses that do not transform their input at all
void setPreservesAll() { PreservesAll = true; }
- bool preservesAll() const { return PreservesAll; }
-
- // preservesCFG - 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.
- //
- // This function annotates the AnalysisUsage info object to say that analyses
- // that only depend on the CFG are preserved by this pass.
- //
- void preservesCFG();
+ bool getPreservesAll() const { return PreservesAll; }
+
+ /// setPreservesCFG - 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.
+ ///
+ /// This function annotates the AnalysisUsage info object to say that analyses
+ /// that only depend on the CFG are preserved by this pass.
+ ///
+ void setPreservesCFG();
const std::vector<AnalysisID> &getRequiredSet() const { return Required; }
+ const std::vector<AnalysisID> &getRequiredTransitiveSet() const {
+ return RequiredTransitive;
+ }
const std::vector<AnalysisID> &getPreservedSet() const { return Preserved; }
};
// is used to pull analysis information out of them.
//
struct AnalysisResolver {
+ virtual ~AnalysisResolver();
virtual Pass *getAnalysisOrNullUp(AnalysisID ID) const = 0;
virtual Pass *getAnalysisOrNullDown(AnalysisID ID) const = 0;
- Pass *getAnalysis(AnalysisID ID) {
+ virtual void addPass(ImmutablePass *IP, AnalysisUsage &AU) = 0;
+ Pass *getAnalysis(AnalysisID ID) const {
Pass *Result = getAnalysisOrNullUp(ID);
assert(Result && "Pass has an incorrect analysis uses set!");
return Result;
}
// getAnalysisToUpdate - Return an analysis result or null if it doesn't exist
- Pass *getAnalysisToUpdate(AnalysisID ID) {
+ Pass *getAnalysisToUpdate(AnalysisID ID) const {
return getAnalysisOrNullUp(ID);
}
void setAnalysisResolver(Pass *P, AnalysisResolver *AR);
};
+/// getAnalysisToUpdate<AnalysisType>() - This function is used by subclasses
+/// to get to the analysis information that might be around that needs to be
+/// updated. This is different than getAnalysis in that it can fail (ie the
+/// analysis results haven't been computed), so should only be used if you
+/// provide the capability to update an analysis that exists. This method is
+/// often used by transformation APIs to update analysis results for a pass
+/// automatically as the transform is performed.
+///
+template<typename AnalysisType>
+AnalysisType *Pass::getAnalysisToUpdate() 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->getAnalysisToUpdate(PI));
+}
+
+} // End llvm namespace
+
#endif
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