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https://github.com/c64scene-ar/llvm-6502.git
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55b45bfae3
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3164 91177308-0d34-0410-b5e6-96231b3b80d8
102 lines
3.3 KiB
C++
102 lines
3.3 KiB
C++
//===- llvm/PassAnalysisSupport.h - Analysis Pass Support code ---*- C++ -*-==//
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//
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// This file defines stuff that is used to define and "use" Analysis Passes.
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// This file is automatically #included by Pass.h, so:
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//
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// NO .CPP FILES SHOULD INCLUDE THIS FILE DIRECTLY
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//
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// Instead, #include Pass.h
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_PASS_ANALYSIS_SUPPORT_H
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#define LLVM_PASS_ANALYSIS_SUPPORT_H
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// No need to include Pass.h, we are being included by it!
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//===----------------------------------------------------------------------===//
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// AnalysisUsage - Represent the analysis usage information of a pass. This
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// tracks analyses that the pass REQUIRES (must available when the pass runs),
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// and analyses that the pass PRESERVES (the pass does not invalidate the
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// results of these analyses). This information is provided by a pass to the
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// Pass infrastructure through the getAnalysisUsage virtual function.
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//
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class AnalysisUsage {
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// Sets of analyses required and preserved by a pass
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std::vector<AnalysisID> Required, Preserved;
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bool PreservesAll;
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public:
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AnalysisUsage() : PreservesAll(false) {}
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// addRequires - Add the specified ID to the required set of the usage info
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// for a pass.
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//
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AnalysisUsage &addRequired(AnalysisID ID) {
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Required.push_back(ID);
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return *this;
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}
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// addPreserves - Add the specified ID to the set of analyses preserved by
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// this pass
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//
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AnalysisUsage &addPreserved(AnalysisID ID) {
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Preserved.push_back(ID);
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return *this;
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}
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// PreservesAll - Set by analyses that do not transform their input at all
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void setPreservesAll() { PreservesAll = true; }
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bool preservesAll() const { return PreservesAll; }
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// preservesCFG - This function should be called to by the pass, iff they do
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// not:
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//
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// 1. Add or remove basic blocks from the function
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// 2. Modify terminator instructions in any way.
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//
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// This function annotates the AnalysisUsage info object to say that analyses
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// that only depend on the CFG are preserved by this pass.
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//
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void preservesCFG();
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const std::vector<AnalysisID> &getRequiredSet() const { return Required; }
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const std::vector<AnalysisID> &getPreservedSet() const { return Preserved; }
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};
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//===----------------------------------------------------------------------===//
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// AnalysisResolver - Simple interface implemented by PassManager objects that
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// is used to pull analysis information out of them.
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//
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struct AnalysisResolver {
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virtual Pass *getAnalysisOrNullUp(AnalysisID ID) const = 0;
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virtual Pass *getAnalysisOrNullDown(AnalysisID ID) const = 0;
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Pass *getAnalysis(AnalysisID ID) {
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Pass *Result = getAnalysisOrNullUp(ID);
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assert(Result && "Pass has an incorrect analysis uses set!");
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return Result;
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}
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// getAnalysisToUpdate - Return an analysis result or null if it doesn't exist
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Pass *getAnalysisToUpdate(AnalysisID ID) {
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return getAnalysisOrNullUp(ID);
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}
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// Methods for introspecting into pass manager objects...
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virtual unsigned getDepth() const = 0;
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virtual unsigned getNumContainedPasses() const = 0;
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virtual const Pass *getContainedPass(unsigned N) const = 0;
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virtual void markPassUsed(AnalysisID P, Pass *User) = 0;
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void startPass(Pass *P) {}
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void endPass(Pass *P) {}
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protected:
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void setAnalysisResolver(Pass *P, AnalysisResolver *AR);
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};
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#endif
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