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-//===- 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/Analysis/CallGraph.h"
-#include "llvm/IR/CallSite.h"
-#include "llvm/IR/Module.h"
-#include "llvm/Pass.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) {}
- 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;
-
- 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;
- }
-
- void getAnalysisUsage(AnalysisUsage &AU) const override {
- AU.setPreservesAll();
- }
- };
-}
-
-char ExternalFunctionsPassedConstants::ID = 0;
-static RegisterPass<ExternalFunctionsPassedConstants>
- P1("print-externalfnconstants",
- "Print external fn callsites passed constants");