[PM] Port EarlyCSE to the new pass manager.

[oota-llvm.git] / tools / opt / AnalysisWrappers.cpp

diff --git a/tools/opt/AnalysisWrappers.cpp b/tools/opt/AnalysisWrappers.cpp
index aa9f03d88388202c77712dd17013af93afef9045..4bdc268f8d7594d54bb0b6e5ba9b1c23e38556b8 100644 (file)
--- a/tools/opt/AnalysisWrappers.cpp
+++ b/tools/opt/AnalysisWrappers.cpp
@@ -1,10 +1,10 @@
 //===- AnalysisWrappers.cpp - Wrappers around non-pass analyses -----------===//
-// 
+//
 //                     The LLVM Compiler Infrastructure
 //
-// This file was developed by the LLVM research group and is distributed under
-// the University of Illinois Open Source License. See LICENSE.TXT for details.
-// 
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
 //===----------------------------------------------------------------------===//
 //
 // This file defines pass wrappers around LLVM analyses that don't make sense to
@@ -17,24 +17,77 @@
 //
 //===----------------------------------------------------------------------===//
 
+#include "llvm/Analysis/CallGraph.h"
+#include "llvm/IR/CallSite.h"
+#include "llvm/IR/Module.h"
 #include "llvm/Pass.h"
-#include "llvm/Analysis/InstForest.h"
-
+#include "llvm/Support/raw_ostream.h"
 using namespace llvm;
 
 namespace {
-  struct InstForestHelper : public FunctionPass {
-    Function *F;
-    virtual bool runOnFunction(Function &Func) { F = &Func; return false; }
+  /// ExternalFunctionsPassedConstants - This pass prints out call sites to
+  /// external functions that are called with constant arguments.  This can be
+  /// useful when looking for standard library functions we should constant fold
+  /// or handle in alias analyses.
+  struct ExternalFunctionsPassedConstants : public ModulePass {
+    static char ID; // Pass ID, replacement for typeid
+    ExternalFunctionsPassedConstants() : ModulePass(ID) {}
+    bool runOnModule(Module &M) override {
+      for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I) {
+        if (!I->isDeclaration()) continue;
+
+        bool PrintedFn = false;
+        for (User *U : I->users()) {
+          Instruction *UI = dyn_cast<Instruction>(U);
+          if (!UI) continue;
+
+          CallSite CS(cast<Value>(UI));
+          if (!CS) continue;
 
-    void print(std::ostream &OS) const {
-      std::cout << InstForest<char>(F);
+          for (CallSite::arg_iterator AI = CS.arg_begin(),
+               E = CS.arg_end(); AI != E; ++AI) {
+            if (!isa<Constant>(*AI)) continue;
+
+            if (!PrintedFn) {
+              errs() << "Function '" << I->getName() << "':\n";
+              PrintedFn = true;
+            }
+            errs() << *UI;
+            break;
+          }
+        }
+      }
+
+      return false;
     }
-    
-    virtual void getAnalysisUsage(AnalysisUsage &AU) const {
+
+    void getAnalysisUsage(AnalysisUsage &AU) const override {
       AU.setPreservesAll();
     }
   };
+}
 
-  RegisterAnalysis<InstForestHelper> P1("instforest", "InstForest Printer");
+char ExternalFunctionsPassedConstants::ID = 0;
+static RegisterPass<ExternalFunctionsPassedConstants>
+  P1("print-externalfnconstants",
+     "Print external fn callsites passed constants");
+
+namespace {
+  struct CallGraphPrinter : public ModulePass {
+    static char ID; // Pass ID, replacement for typeid
+    CallGraphPrinter() : ModulePass(ID) {}
+
+    void getAnalysisUsage(AnalysisUsage &AU) const override {
+      AU.setPreservesAll();
+      AU.addRequiredTransitive<CallGraphWrapperPass>();
+    }
+    bool runOnModule(Module &M) override {
+      getAnalysis<CallGraphWrapperPass>().print(errs(), &M);
+      return false;
+    }
+  };
 }
+
+char CallGraphPrinter::ID = 0;
+static RegisterPass<CallGraphPrinter>
+  P2("print-callgraph", "Print a call graph");