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Add support for passes to announce that they only depend on the CFG of a

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function.  This is crude but effective

llvm-svn: 2505
This commit is contained in:
Chris Lattner 2002-05-06 19:31:16 +00:00
parent ca538273d4
commit bd5095f570
1 changed files with 9 additions and 0 deletions
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9
include/llvm/Pass.h
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@ -219,6 +219,15 @@ public:
return AnalysisID(NextID++, CreatePass<AnalysisType>); return AnalysisID(NextID++, CreatePass<AnalysisType>);
} }
// Special Copy Constructor - This is how analysis passes declare that they
// only depend on the CFG of the function they are working on, so they are not
// invalidated by other passes that do not modify the CFG. This should be
// used like this:
// AnalysisID DominatorSet::ID(AnalysisID::create<DominatorSet>(), true);
//
AnalysisID(const AnalysisID &AID, bool DependsOnlyOnCFG = false);
inline Pass *createPass() const { return Constructor(*this); } inline Pass *createPass() const { return Constructor(*this); }
inline bool operator==(const AnalysisID &A) const { inline bool operator==(const AnalysisID &A) const {