#ifndef LLVM_PASS_ANALYSIS_SUPPORT_H
#define LLVM_PASS_ANALYSIS_SUPPORT_H
-#include <vector>
+#include "llvm/Pass.h"
#include "llvm/ADT/SmallVector.h"
+#include "llvm/ADT/StringRef.h"
+#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 be available when the pass
return *this;
}
+ // addPreserved - 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!");
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;
+ }
+
// setPreservesAll - Set by analyses that do not transform their input at all
void setPreservesAll() { PreservesAll = true; }
bool getPreservesAll() const { return PreservesAll; }
const PassInfo *PI = getClassPassInfo<AnalysisType>();
if (PI == 0) return 0;
- return dynamic_cast<AnalysisType*>
- (Resolver->getAnalysisIfAvailable(PI, true));
+
+ Pass *ResultPass = Resolver->getAnalysisIfAvailable(PI, true);
+ if (ResultPass == 0) return 0;
+
+ // 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!");
-
+ assert(Resolver && "Pass has not been inserted into a PassManager object!");
return getAnalysisID<AnalysisType>(getClassPassInfo<AnalysisType>());
}
"'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
template<typename AnalysisType>
AnalysisType &Pass::getAnalysisID(const PassInfo *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 &&
- "getAnalysis*() called on an analysis that was not "
- "'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;
+ 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");
+
+ // 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);
}
} // End llvm namespace