1 //===----------------------------------------------------------------------===//
2 // 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/Instruction.h"
14 #include "llvm/Module.h"
15 #include "llvm/Function.h"
16 #include "llvm/iPHINode.h"
17 #include "llvm/Type.h"
18 #include "llvm/PassManager.h"
19 #include "llvm/Bytecode/Reader.h"
20 #include "llvm/Assembly/Parser.h"
21 #include "llvm/Assembly/PrintModulePass.h"
22 #include "llvm/Assembly/Writer.h"
23 #include "llvm/Analysis/Writer.h"
24 #include "llvm/Analysis/InstForest.h"
25 #include "llvm/Analysis/Dominators.h"
26 #include "llvm/Analysis/IntervalPartition.h"
27 #include "llvm/Analysis/Expressions.h"
28 #include "llvm/Analysis/InductionVariable.h"
29 #include "llvm/Analysis/CallGraph.h"
30 #include "llvm/Analysis/LoopInfo.h"
31 #include "llvm/Analysis/DataStructure.h"
32 #include "llvm/Analysis/FindUnsafePointerTypes.h"
33 #include "llvm/Analysis/FindUsedTypes.h"
34 #include "llvm/Support/InstIterator.h"
35 #include "Support/CommandLine.h"
42 //===----------------------------------------------------------------------===//
43 // printPass - Specify how to print out a pass. For most passes, the standard
44 // way of using operator<< works great, so we use it directly...
46 template<class PassType>
47 static void printPass(PassType &P, ostream &O, Module *M) {
51 template<class PassType>
52 static void printPass(PassType &P, ostream &O, Function *F) {
56 // Other classes require more information to print out information, so we
57 // specialize the template here for them...
60 static void printPass(DataStructure &P, ostream &O, Module *M) {
65 static void printPass(FindUsedTypes &FUT, ostream &O, Module *M) {
70 static void printPass(FindUnsafePointerTypes &FUPT, ostream &O,
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 virtual bool run(Module *M) {
88 std::cout << Message << "\n";
89 printPass(getAnalysis<PassName>(ID), std::cout, M);
93 virtual void getAnalysisUsageInfo(Pass::AnalysisSet &Required,
94 Pass::AnalysisSet &Destroyed,
95 Pass::AnalysisSet &Provided) {
96 Required.push_back(ID);
100 template <class PassName>
101 class PassPrinter<MethodPass, PassName> : public MethodPass {
102 const string Message;
105 PassPrinter(const string &M, AnalysisID id) : Message(M), ID(id) {}
107 virtual bool runOnMethod(Function *F) {
108 std::cout << Message << " on method '" << F->getName() << "'\n";
109 printPass(getAnalysis<PassName>(ID), std::cout, F);
113 virtual void getAnalysisUsageInfo(Pass::AnalysisSet &Required,
114 Pass::AnalysisSet &Destroyed,
115 Pass::AnalysisSet &Provided) {
116 Required.push_back(ID);
122 template <class PassType, class PassName, AnalysisID &ID>
123 Pass *New(const string &Message) {
124 return new PassPrinter<PassType, PassName>(Message, ID);
126 template <class PassType, class PassName>
127 Pass *New(const string &Message) {
128 return new PassPrinter<PassType, PassName>(Message, PassName::ID);
133 Pass *NewPrintFunction(const string &Message) {
134 return new PrintFunctionPass(Message, &std::cout);
136 Pass *NewPrintModule(const string &Message) {
137 return new PrintModulePass(&std::cout);
140 struct InstForest : public MethodPass {
141 void doit(Function *F) {
142 std::cout << analysis::InstForest<char>(F);
146 struct IndVars : public MethodPass {
147 void doit(Function *F) {
148 cfg::LoopInfo &LI = getAnalysis<cfg::LoopInfo>();
149 for (inst_iterator I = inst_begin(F), E = inst_end(F); I != E; ++I)
150 if (PHINode *PN = dyn_cast<PHINode>(*I)) {
151 InductionVariable IV(PN, &LI);
152 if (IV.InductionType != InductionVariable::Unknown)
157 void getAnalysisUsageInfo(Pass::AnalysisSet &Req,
158 Pass::AnalysisSet &, Pass::AnalysisSet &) {
159 Req.push_back(cfg::LoopInfo::ID);
163 struct Exprs : public MethodPass {
164 static void doit(Function *F) {
165 std::cout << "Classified expressions for: " << F->getName() << "\n";
166 for (inst_iterator I = inst_begin(F), E = inst_end(F); I != E; ++I) {
169 if ((*I)->getType() == Type::VoidTy) continue;
170 analysis::ExprType R = analysis::ClassifyExpression(*I);
171 if (R.Var == *I) continue; // Doesn't tell us anything
173 std::cout << "\t\tExpr =";
175 case analysis::ExprType::ScaledLinear:
176 WriteAsOperand(std::cout << "(", (Value*)R.Scale) << " ) *";
178 case analysis::ExprType::Linear:
179 WriteAsOperand(std::cout << "(", R.Var) << " )";
180 if (R.Offset == 0) break;
181 else std::cout << " +";
183 case analysis::ExprType::Constant:
184 if (R.Offset) WriteAsOperand(std::cout, (Value*)R.Offset);
185 else std::cout << " 0";
194 template<class TraitClass>
195 class PrinterPass : public TraitClass {
196 const string Message;
198 PrinterPass(const string &M) : Message(M) {}
200 virtual bool runOnMethod(Function *F) {
201 std::cout << Message << " on method '" << F->getName() << "'\n";
209 template<class PassClass>
210 Pass *Create(const string &Message) {
211 return new PassClass(Message);
218 print, intervals, exprs, instforest, loops, indvars,
221 printmodule, callgraph, datastructure, printusedtypes, unsafepointertypes,
223 domset, idom, domtree, domfrontier,
224 postdomset, postidom, postdomtree, postdomfrontier,
227 cl::String InputFilename ("", "Load <arg> file to analyze", cl::NoFlags, "-");
228 cl::Flag Quiet ("q", "Don't print analysis pass names");
229 cl::Alias QuietA ("quiet", "Alias for -q", cl::NoFlags, Quiet);
230 cl::EnumList<enum Ans> AnalysesList(cl::NoFlags,
231 clEnumVal(print , "Print each function"),
232 clEnumVal(intervals , "Print Interval Partitions"),
233 clEnumVal(exprs , "Classify Expressions"),
234 clEnumVal(instforest , "Print Instruction Forest"),
235 clEnumVal(loops , "Print natural loops"),
236 clEnumVal(indvars , "Print Induction Variables"),
238 clEnumVal(printmodule , "Print entire module"),
239 clEnumVal(callgraph , "Print Call Graph"),
240 clEnumVal(datastructure , "Print data structure information"),
241 clEnumVal(printusedtypes , "Print types used by module"),
242 clEnumVal(unsafepointertypes, "Print unsafe pointer types"),
244 clEnumVal(domset , "Print Dominator Sets"),
245 clEnumVal(idom , "Print Immediate Dominators"),
246 clEnumVal(domtree , "Print Dominator Tree"),
247 clEnumVal(domfrontier , "Print Dominance Frontier"),
249 clEnumVal(postdomset , "Print Postdominator Sets"),
250 clEnumVal(postidom , "Print Immediate Postdominators"),
251 clEnumVal(postdomtree , "Print Post Dominator Tree"),
252 clEnumVal(postdomfrontier, "Print Postdominance Frontier"),
258 Pass *(*PassConstructor)(const string &Message);
261 { print , NewPrintFunction },
262 { intervals , New<MethodPass, cfg::IntervalPartition> },
263 { loops , New<MethodPass, cfg::LoopInfo> },
264 { instforest , Create<PrinterPass<InstForest> > },
265 { indvars , Create<PrinterPass<IndVars> > },
266 { exprs , Create<PrinterPass<Exprs> > },
269 { printmodule , NewPrintModule },
270 { printusedtypes , New<Pass, FindUsedTypes> },
271 { callgraph , New<Pass, CallGraph> },
272 { datastructure , New<Pass, DataStructure> },
273 { unsafepointertypes, New<Pass, FindUnsafePointerTypes> },
275 // Dominator analyses
276 { domset , New<MethodPass, cfg::DominatorSet> },
277 { idom , New<MethodPass, cfg::ImmediateDominators> },
278 { domtree , New<MethodPass, cfg::DominatorTree> },
279 { domfrontier , New<MethodPass, cfg::DominanceFrontier> },
281 { postdomset , New<MethodPass, cfg::DominatorSet, cfg::DominatorSet::PostDomID> },
282 { postidom , New<MethodPass, cfg::ImmediateDominators, cfg::ImmediateDominators::PostDomID> },
283 { postdomtree , New<MethodPass, cfg::DominatorTree, cfg::DominatorTree::PostDomID> },
284 { postdomfrontier , New<MethodPass, cfg::DominanceFrontier, cfg::DominanceFrontier::PostDomID> },
287 int main(int argc, char **argv) {
288 cl::ParseCommandLineOptions(argc, argv, " llvm analysis printer tool\n");
292 CurMod = ParseBytecodeFile(InputFilename);
293 if (!CurMod && !(CurMod = ParseAssemblyFile(InputFilename))){
294 std::cerr << "Input file didn't read correctly.\n";
297 } catch (const ParseException &E) {
298 std::cerr << E.getMessage() << "\n";
302 // Create a PassManager to hold and optimize the collection of passes we are
305 PassManager Analyses;
307 // Loop over all of the analyses looking for analyses to run...
308 for (unsigned i = 0; i < AnalysesList.size(); ++i) {
309 enum Ans AnalysisPass = AnalysesList[i];
311 for (unsigned j = 0; j < sizeof(AnTable)/sizeof(AnTable[0]); ++j) {
312 if (AnTable[j].AnID == AnalysisPass) {
315 Message = "\nRunning: '" +
316 string(AnalysesList.getArgDescription(AnalysisPass)) + "' analysis";
317 Analyses.add(AnTable[j].PassConstructor(Message));
318 break; // get an error later
323 Analyses.run(CurMod);