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- Pass now has AnalysisImpls class to implement getAnalysis() so that it is

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correct even when called back by another passes run method.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3531 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2002-08-30 20:19:49 +00:00
parent 1a24282b5c
commit 76a8f7fb5a
1 changed files with 30 additions and 12 deletions
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42
include/llvm/Pass.h
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@ -47,6 +47,12 @@ class Pass {
friend class AnalysisResolver;
AnalysisResolver *Resolver; // AnalysisResolver this pass is owned by...
const PassInfo *PassInfoCache;
// AnalysisImpls - This keeps track of which passes implement the interfaces
// that are required by the current pass (to implement getAnalysis()).
//
std::vector<std::pair<const PassInfo*, Pass*> > AnalysisImpls;
void operator=(const Pass&); // DO NOT IMPLEMENT
Pass(const Pass &); // DO NOT IMPLEMENT
public:
@ -129,24 +135,36 @@ protected:
AnalysisType &getAnalysis() const {
assert(Resolver && "Pass has not been inserted into a PassManager object!");
const PassInfo *PI = getClassPassInfo<AnalysisType>();
assert(PI && "getAnalysis for unregistered 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*>(Resolver->getAnalysis(PI));
assert(Result && "Pass does not implement interface required!");
return *Result;
return getAnalysisID<AnalysisType>(PI);
}
template<typename AnalysisType>
AnalysisType &getAnalysisID(const PassInfo *PI) const {
assert(Resolver && "Pass has not been inserted into a PassManager object!");
assert(PI && "getAnalysis for unregistered pass!");
return *dynamic_cast<AnalysisType*>(Resolver->getAnalysis(PI));
// 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 = 0;
for (unsigned i = 0; ; ++i) {
assert(i != AnalysisImpls.size() &&
"getAnalysis*() called on an analysis that we not "
"'required' by pass!");
if (AnalysisImpls[i].first == PI) {
ResultPass = AnalysisImpls[i].second;
break;
}
}
// 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;
}
/// getAnalysisToUpdate<AnalysisType>() - This function is used by subclasses