1 //===- AnalysisWrappers.cpp - Wrappers around non-pass analyses -----------===//
3 // The LLVM Compiler Infrastructure
5 // This file was developed by the LLVM research group and is distributed under
6 // the University of Illinois Open Source License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file defines pass wrappers around LLVM analyses that don't make sense to
11 // be passes. It provides a nice standard pass interface to these classes so
12 // that they can be printed out by analyze.
14 // These classes are separated out of analyze.cpp so that it is more clear which
15 // code is the integral part of the analyze tool, and which part of the code is
16 // just making it so more passes are available.
18 //===----------------------------------------------------------------------===//
20 #include "llvm/Module.h"
21 #include "llvm/Pass.h"
22 #include "llvm/Analysis/InstForest.h"
23 #include "llvm/Support/CallSite.h"
29 struct InstForestHelper : public FunctionPass {
31 virtual bool runOnFunction(Function &Func) { F = &Func; return false; }
33 void print(std::ostream &OS) const {
34 std::cout << InstForest<char>(F);
37 virtual void getAnalysisUsage(AnalysisUsage &AU) const {
42 RegisterAnalysis<InstForestHelper> P1("instforest", "InstForest Printer");
46 /// ExternalFunctionsPassedConstants - This pass prints out call sites to
47 /// external functions that are called with constant arguments. This can be
48 /// useful when looking for standard library functions we should constant fold
49 /// or handle in alias analyses.
50 struct ExternalFunctionsPassedConstants : public Pass {
51 virtual bool run(Module &M) {
52 for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I)
53 if (I->isExternal()) {
54 bool PrintedFn = false;
55 for (Value::use_iterator UI = I->use_begin(), E = I->use_end();
57 if (Instruction *User = dyn_cast<Instruction>(*UI)) {
58 CallSite CS = CallSite::get(User);
59 if (CS.getInstruction()) {
60 for (CallSite::arg_iterator AI = CS.arg_begin(),
61 E = CS.arg_end(); AI != E; ++AI)
62 if (isa<Constant>(*AI) || isa<GlobalValue>(*AI)) {
64 std::cerr << "Function '" << I->getName() << "':\n";
77 void print(std::ostream &OS) const {}
79 virtual void getAnalysisUsage(AnalysisUsage &AU) const {
84 RegisterAnalysis<ExternalFunctionsPassedConstants>
85 P2("externalfnconstants", "Print external fn callsites passed constants");