1 //===----------------------------------------------------------------------===//
2 // The LLVM analyze utility
4 // This utility is designed to print out the results of running various analysis
5 // passes on a program. This is useful for understanding a program, or for
6 // debugging an analysis pass.
8 // analyze --help - Output information about command line switches
9 // analyze --quiet - Do not print analysis name before output
11 //===----------------------------------------------------------------------===//
13 #include "llvm/Module.h"
14 #include "llvm/iPHINode.h"
15 #include "llvm/Type.h"
16 #include "llvm/PassManager.h"
17 #include "llvm/Bytecode/Reader.h"
18 #include "llvm/Assembly/Parser.h"
19 #include "llvm/Assembly/PrintModulePass.h"
20 #include "llvm/Assembly/Writer.h"
21 #include "llvm/Analysis/Writer.h"
22 #include "llvm/Analysis/InstForest.h"
23 #include "llvm/Analysis/Dominators.h"
24 #include "llvm/Analysis/IntervalPartition.h"
25 #include "llvm/Analysis/Expressions.h"
26 #include "llvm/Analysis/InductionVariable.h"
27 #include "llvm/Analysis/CallGraph.h"
28 #include "llvm/Analysis/LoopInfo.h"
29 #include "llvm/Analysis/DataStructure.h"
30 #include "llvm/Analysis/FindUnsafePointerTypes.h"
31 #include "llvm/Analysis/FindUsedTypes.h"
32 #include "llvm/Support/InstIterator.h"
33 #include "Support/CommandLine.h"
39 //===----------------------------------------------------------------------===//
40 // printPass - Specify how to print out a pass. For most passes, the standard
41 // way of using operator<< works great, so we use it directly...
43 template<class PassType>
44 static void printPass(PassType &P, ostream &O, Module &M) {
48 template<class PassType>
49 static void printPass(PassType &P, ostream &O, Function &F) {
53 // Other classes require more information to print out information, so we
54 // specialize the template here for them...
57 static void printPass(LocalDataStructures &P, ostream &O, Module &M) {
61 static void printPass(BUDataStructures &P, ostream &O, Module &M) {
66 static void printPass(FindUsedTypes &FUT, ostream &O, Module &M) {
67 FUT.printTypes(O, &M);
71 static void printPass(FindUnsafePointerTypes &FUPT, ostream &O, Module &M) {
72 FUPT.printResults(&M, O);
77 template <class PassType, class PassName>
78 class PassPrinter; // Do not implement
80 template <class PassName>
81 class PassPrinter<Pass, PassName> : public Pass {
85 PassPrinter(const string &M, AnalysisID id) : Message(M), ID(id) {}
87 const char *getPassName() const { return "IP Pass Printer"; }
89 virtual bool run(Module &M) {
90 std::cout << Message << "\n";
91 printPass(getAnalysis<PassName>(ID), std::cout, M);
95 virtual void getAnalysisUsage(AnalysisUsage &AU) const {
100 template <class PassName>
101 class PassPrinter<FunctionPass, PassName> : public FunctionPass {
102 const string Message;
105 PassPrinter(const string &M, AnalysisID id) : Message(M), ID(id) {}
107 const char *getPassName() const { return "Function Pass Printer"; }
109 virtual bool runOnFunction(Function &F) {
110 std::cout << Message << " on function '" << F.getName() << "'\n";
111 printPass(getAnalysis<PassName>(ID), std::cout, F);
115 virtual void getAnalysisUsage(AnalysisUsage &AU) const {
117 AU.setPreservesAll();
123 template <class PassType, class PassName, AnalysisID &ID>
124 Pass *New(const string &Message) {
125 return new PassPrinter<PassType, PassName>(Message, ID);
127 template <class PassType, class PassName>
128 Pass *New(const string &Message) {
129 return new PassPrinter<PassType, PassName>(Message, PassName::ID);
133 Pass *createPrintFunctionPass(const string &Message) {
134 return new PrintFunctionPass(Message, &std::cout);
136 Pass *createPrintModulePass(const string &Message) {
137 return new PrintModulePass(&std::cout);
140 struct InstForestHelper : public FunctionPass {
141 const char *getPassName() const { return "InstForest Printer"; }
143 void doit(Function &F) {
144 std::cout << InstForest<char>(&F);
147 virtual void getAnalysisUsage(AnalysisUsage &AU) const {
148 AU.setPreservesAll();
152 struct IndVars : public FunctionPass {
153 const char *getPassName() const { return "IndVars Printer"; }
155 void doit(Function &F) {
156 LoopInfo &LI = getAnalysis<LoopInfo>();
157 for (inst_iterator I = inst_begin(F), E = inst_end(F); I != E; ++I)
158 if (PHINode *PN = dyn_cast<PHINode>(*I)) {
159 InductionVariable IV(PN, &LI);
160 if (IV.InductionType != InductionVariable::Unknown)
165 void getAnalysisUsage(AnalysisUsage &AU) const {
166 AU.addRequired(LoopInfo::ID);
167 AU.setPreservesAll();
171 struct Exprs : public FunctionPass {
172 const char *getPassName() const { return "Expression Printer"; }
174 static void doit(Function &F) {
175 std::cout << "Classified expressions for: " << F.getName() << "\n";
176 for (inst_iterator I = inst_begin(F), E = inst_end(F); I != E; ++I) {
179 if ((*I)->getType() == Type::VoidTy) continue;
180 analysis::ExprType R = analysis::ClassifyExpression(*I);
181 if (R.Var == *I) continue; // Doesn't tell us anything
183 std::cout << "\t\tExpr =";
185 case analysis::ExprType::ScaledLinear:
186 WriteAsOperand(std::cout << "(", (Value*)R.Scale) << " ) *";
188 case analysis::ExprType::Linear:
189 WriteAsOperand(std::cout << "(", R.Var) << " )";
190 if (R.Offset == 0) break;
191 else std::cout << " +";
193 case analysis::ExprType::Constant:
194 if (R.Offset) WriteAsOperand(std::cout, (Value*)R.Offset);
195 else std::cout << " 0";
201 virtual void getAnalysisUsage(AnalysisUsage &AU) const {
202 AU.setPreservesAll();
207 template<class TraitClass>
208 class PrinterPass : public TraitClass {
209 const string Message;
211 PrinterPass(const string &M) : Message(M) {}
213 virtual bool runOnFunction(Function &F) {
214 std::cout << Message << " on function '" << F.getName() << "'\n";
222 template<class PassClass>
223 Pass *Create(const string &Message) {
224 return new PassClass(Message);
231 print, intervals, exprs, instforest, loops, indvars,
234 printmodule, callgraph, datastructure, budatastructure,
235 printusedtypes, unsafepointertypes,
237 domset, idom, domtree, domfrontier,
238 postdomset, postidom, postdomtree, postdomfrontier,
241 cl::String InputFilename ("", "Load <arg> file to analyze", cl::NoFlags, "-");
242 cl::Flag Quiet ("q", "Don't print analysis pass names");
243 cl::Alias QuietA ("quiet", "Alias for -q", cl::NoFlags, Quiet);
244 cl::EnumList<enum Ans> AnalysesList(cl::NoFlags,
245 clEnumVal(print , "Print each function"),
246 clEnumVal(intervals , "Print Interval Partitions"),
247 clEnumVal(exprs , "Classify Expressions"),
248 clEnumVal(instforest , "Print Instruction Forest"),
249 clEnumVal(loops , "Print natural loops"),
250 clEnumVal(indvars , "Print Induction Variables"),
252 clEnumVal(printmodule , "Print entire module"),
253 clEnumVal(callgraph , "Print Call Graph"),
254 clEnumVal(datastructure , "Print data structure information"),
255 clEnumVal(budatastructure, "Print bottom-up data structure information"),
256 clEnumVal(printusedtypes , "Print types used by module"),
257 clEnumVal(unsafepointertypes, "Print unsafe pointer types"),
259 clEnumVal(domset , "Print Dominator Sets"),
260 clEnumVal(idom , "Print Immediate Dominators"),
261 clEnumVal(domtree , "Print Dominator Tree"),
262 clEnumVal(domfrontier , "Print Dominance Frontier"),
264 clEnumVal(postdomset , "Print Postdominator Sets"),
265 clEnumVal(postidom , "Print Immediate Postdominators"),
266 clEnumVal(postdomtree , "Print Post Dominator Tree"),
267 clEnumVal(postdomfrontier, "Print Postdominance Frontier"),
273 Pass *(*PassConstructor)(const string &Message);
276 { print , createPrintFunctionPass },
277 { intervals , New<FunctionPass, IntervalPartition> },
278 { loops , New<FunctionPass, LoopInfo> },
279 { instforest , Create<PrinterPass<InstForestHelper> > },
280 { indvars , Create<PrinterPass<IndVars> > },
281 { exprs , Create<PrinterPass<Exprs> > },
284 { printmodule , createPrintModulePass },
285 { printusedtypes , New<Pass, FindUsedTypes> },
286 { callgraph , New<Pass, CallGraph> },
287 { datastructure , New<Pass, LocalDataStructures> },
288 { budatastructure , New<Pass, BUDataStructures> },
289 { unsafepointertypes, New<Pass, FindUnsafePointerTypes> },
291 // Dominator analyses
292 { domset , New<FunctionPass, DominatorSet> },
293 { idom , New<FunctionPass, ImmediateDominators> },
294 { domtree , New<FunctionPass, DominatorTree> },
295 { domfrontier , New<FunctionPass, DominanceFrontier> },
297 { postdomset , New<FunctionPass, DominatorSet, DominatorSet::PostDomID> },
298 { postidom , New<FunctionPass, ImmediateDominators, ImmediateDominators::PostDomID> },
299 { postdomtree , New<FunctionPass, DominatorTree, DominatorTree::PostDomID> },
300 { postdomfrontier , New<FunctionPass, DominanceFrontier, DominanceFrontier::PostDomID> },
303 int main(int argc, char **argv) {
304 cl::ParseCommandLineOptions(argc, argv, " llvm analysis printer tool\n");
308 CurMod = ParseBytecodeFile(InputFilename);
309 if (!CurMod && !(CurMod = ParseAssemblyFile(InputFilename))){
310 std::cerr << "Input file didn't read correctly.\n";
313 } catch (const ParseException &E) {
314 std::cerr << E.getMessage() << "\n";
318 // Create a PassManager to hold and optimize the collection of passes we are
321 PassManager Analyses;
323 // Loop over all of the analyses looking for analyses to run...
324 for (unsigned i = 0; i < AnalysesList.size(); ++i) {
325 enum Ans AnalysisPass = AnalysesList[i];
327 for (unsigned j = 0; j < sizeof(AnTable)/sizeof(AnTable[0]); ++j) {
328 if (AnTable[j].AnID == AnalysisPass) {
331 Message = "\nRunning: '" +
332 string(AnalysesList.getArgDescription(AnalysisPass)) + "' analysis";
333 Analyses.add(AnTable[j].PassConstructor(Message));
334 break; // get an error later
339 Analyses.run(*CurMod);