Identify Analysis pass.

Do not run analysis pass again if analysis info is still available.
This fixes PR1441.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48476 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Analysis/AliasAnalysisCounter.cpp

@@ -72,6 +72,9 @@ namespace {
       }
     }
 
+    /// isAnalysis - Return true if this pass is  implementing an analysis pass.
+    virtual bool isAnalysis() const { return true; }
+
     bool runOnModule(Module &M) {
       this->M = &M;
       InitializeAliasAnalysis(this);

lib/Analysis/AliasAnalysisEvaluator.cpp

@@ -70,6 +70,9 @@ namespace {
       return false;
     }
 
+    /// isAnalysis - Return true if this pass is  implementing an analysis pass.
+    virtual bool isAnalysis() const { return true; }
+
     bool runOnFunction(Function &F);
     bool doFinalization(Module &M);
   };

lib/Analysis/AliasDebugger.cpp

@@ -43,6 +43,9 @@ namespace {
     static char ID; // Class identification, replacement for typeinfo
     AliasDebugger() : ModulePass((intptr_t)&ID) {}
 
+    /// isAnalysis - Return true if this pass is  implementing an analysis pass.
+    virtual bool isAnalysis() const { return true; }
+
     bool runOnModule(Module &M) {
       InitializeAliasAnalysis(this);                 // set up super class
 

lib/Analysis/AliasSetTracker.cpp

@@ -558,6 +558,9 @@ namespace {
       AU.addRequired<AliasAnalysis>();
     }
 
+    /// isAnalysis - Return true if this pass is  implementing an analysis pass.
+    virtual bool isAnalysis() const { return true; }
+
     virtual bool runOnFunction(Function &F) {
       Tracker = new AliasSetTracker(getAnalysis<AliasAnalysis>());
 

lib/Analysis/CFGPrinter.cpp

@@ -94,6 +94,9 @@ namespace {
     static char ID; // Pass identifcation, replacement for typeid
     CFGViewer() : FunctionPass((intptr_t)&ID) {}
 
+    /// isAnalysis - Return true if this pass is  implementing an analysis pass.
+    virtual bool isAnalysis() const { return true; }
+
     virtual bool runOnFunction(Function &F) {
       F.viewCFG();
       return false;
@@ -114,6 +117,9 @@ namespace {
     static char ID; // Pass identifcation, replacement for typeid
     CFGOnlyViewer() : FunctionPass((intptr_t)&ID) {}
 
+    /// isAnalysis - Return true if this pass is  implementing an analysis pass.
+    virtual bool isAnalysis() const { return true; }
+
     virtual bool runOnFunction(Function &F) {
       CFGOnly = true;
       F.viewCFG();
@@ -137,6 +143,9 @@ namespace {
     CFGPrinter() : FunctionPass((intptr_t)&ID) {}
     explicit CFGPrinter(intptr_t pid) : FunctionPass(pid) {}
 
+    /// isAnalysis - Return true if this pass is  implementing an analysis pass.
+    virtual bool isAnalysis() const { return true; }
+
     virtual bool runOnFunction(Function &F) {
       std::string Filename = "cfg." + F.getName() + ".dot";
       cerr << "Writing '" << Filename << "'...";
@@ -164,6 +173,10 @@ namespace {
   struct VISIBILITY_HIDDEN CFGOnlyPrinter : public CFGPrinter {
     static char ID; // Pass identification, replacement for typeid
     CFGOnlyPrinter() : CFGPrinter((intptr_t)&ID) {}
+
+    /// isAnalysis - Return true if this pass is  implementing an analysis pass.
+    virtual bool isAnalysis() const { return true; }
+
     virtual bool runOnFunction(Function &F) {
       bool OldCFGOnly = CFGOnly;
       CFGOnly = true;

lib/Analysis/IPA/Andersens.cpp

@@ -432,6 +432,9 @@ namespace {
     static char ID;
     Andersens() : ModulePass((intptr_t)&ID) {}
 
+    /// isAnalysis - Return true if this pass is  implementing an analysis pass.
+    virtual bool isAnalysis() const { return true; }
+
     bool runOnModule(Module &M) {
       InitializeAliasAnalysis(this);
       IdentifyObjects(M);

lib/Analysis/IPA/GlobalsModRef.cpp

@@ -86,6 +86,9 @@ namespace {
     static char ID;
     GlobalsModRef() : ModulePass((intptr_t)&ID) {}
 
+    /// isAnalysis - Return true if this pass is  implementing an analysis pass.
+    virtual bool isAnalysis() const { return true; }
+
     bool runOnModule(Module &M) {
       InitializeAliasAnalysis(this);                 // set up super class
       AnalyzeGlobals(M);                          // find non-addr taken globals

lib/Analysis/InstCount.cpp

@@ -51,6 +51,10 @@ namespace {
       abort();
     }
   public:
+
+    /// isAnalysis - Return true if this pass is  implementing an analysis pass.
+    virtual bool isAnalysis() const { return true; }
+
     static char ID; // Pass identification, replacement for typeid
     InstCount() : FunctionPass((intptr_t)&ID) {}
 

lib/Analysis/LoadValueNumbering.cpp

@@ -43,6 +43,9 @@ namespace {
     static char ID; // Class identification, replacement for typeinfo
     LoadVN() : FunctionPass((intptr_t)&ID) {}
 
+    /// isAnalysis - Return true if this pass is  implementing an analysis pass.
+    virtual bool isAnalysis() const { return true; }
+
     /// Pass Implementation stuff.  This doesn't do any analysis.
     ///
     bool runOnFunction(Function &) { return false; }

lib/Analysis/ProfileInfoLoaderPass.cpp

@@ -46,6 +46,9 @@ namespace {
       return "Profiling information loader";
     }
 
+    /// isAnalysis - Return true if this pass is  implementing an analysis pass.
+    virtual bool isAnalysis() const { return true; }
+
     /// run - Load the profile information from the specified file.
     virtual bool runOnModule(Module &M);
   };