1 files changed, 94 insertions, 0 deletions
diff --git a/contrib/llvm/tools/opt/AnalysisWrappers.cpp b/contrib/llvm/tools/opt/AnalysisWrappers.cpp
new file mode 100644
index 0000000..a2b57bb
--- /dev/null
+++ b/contrib/llvm/tools/opt/AnalysisWrappers.cpp
@@ -0,0 +1,94 @@
+//===- AnalysisWrappers.cpp - Wrappers around non-pass analyses -----------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// 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
+// be passes.  It provides a nice standard pass interface to these classes so
+// that they can be printed out by analyze.
+//
+// These classes are separated out of analyze.cpp so that it is more clear which
+// code is the integral part of the analyze tool, and which part of the code is
+// just making it so more passes are available.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Module.h"
+#include "llvm/Pass.h"
+#include "llvm/Support/CallSite.h"
+#include "llvm/Analysis/CallGraph.h"
+#include "llvm/Support/raw_ostream.h"
+using namespace llvm;
+
+namespace {
+  /// 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) {}
+    virtual bool runOnModule(Module &M) {
+      for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I) {
+        if (!I->isDeclaration()) continue;
+        
+        bool PrintedFn = false;
+        for (Value::use_iterator UI = I->use_begin(), E = I->use_end();
+             UI != E; ++UI) {
+          Instruction *User = dyn_cast<Instruction>(*UI);
+          if (!User) continue;
+          
+          CallSite CS(cast<Value>(User));
+          if (!CS) continue;
+          
+          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() << *User;
+            break;
+          }
+        }
+      }
+
+      return false;
+    }
+
+    virtual void getAnalysisUsage(AnalysisUsage &AU) const {
+      AU.setPreservesAll();
+    }
+  };
+}
+
+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) {}
+
+    virtual void getAnalysisUsage(AnalysisUsage &AU) const {
+      AU.setPreservesAll();
+      AU.addRequiredTransitive<CallGraph>();
+    }
+    virtual bool runOnModule(Module &M) {
+      getAnalysis<CallGraph>().print(errs(), &M);
+      return false;
+    }
+  };
+}
+
+char CallGraphPrinter::ID = 0;
+static RegisterPass<CallGraphPrinter>
+  P2("print-callgraph", "Print a call graph");