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/InstForest.h"
22 #include "llvm/Analysis/Expressions.h"
23 #include "llvm/Analysis/InductionVariable.h"
24 #include "llvm/Support/InstIterator.h"
25 #include "llvm/Support/PassNameParser.h"
32 template <class PassType, class PassName>
33 class PassPrinter; // Do not implement
35 template <class PassName>
36 class PassPrinter<Pass, PassName> : public Pass {
39 PassPrinter(AnalysisID id) : ID(id) {}
41 const char *getPassName() const { return "IP Pass Printer"; }
43 virtual bool run(Module &M) {
44 printPass(getAnalysis<PassName>(ID), std::cout, M);
48 virtual void getAnalysisUsage(AnalysisUsage &AU) const {
53 template <class PassName>
54 class PassPrinter<FunctionPass, PassName> : public FunctionPass {
57 PassPrinter(AnalysisID id) : ID(id) {}
59 const char *getPassName() const { return "Function Pass Printer"; }
61 virtual bool runOnFunction(Function &F) {
62 std::cout << "Running on function '" << F.getName() << "'\n";
63 printPass(getAnalysis<PassName>(ID), std::cout, F);
67 virtual void getAnalysisUsage(AnalysisUsage &AU) const {
74 struct InstForestHelper : public FunctionPass {
75 const char *getPassName() const { return "InstForest Printer"; }
77 void doit(Function &F) {
78 std::cout << InstForest<char>(&F);
81 virtual void getAnalysisUsage(AnalysisUsage &AU) const {
86 struct IndVars : public FunctionPass {
87 const char *getPassName() const { return "IndVars Printer"; }
89 void doit(Function &F) {
90 LoopInfo &LI = getAnalysis<LoopInfo>();
91 for (inst_iterator I = inst_begin(F), E = inst_end(F); I != E; ++I)
92 if (PHINode *PN = dyn_cast<PHINode>(*I)) {
93 InductionVariable IV(PN, &LI);
94 if (IV.InductionType != InductionVariable::Unknown)
99 void getAnalysisUsage(AnalysisUsage &AU) const {
100 AU.addRequired(LoopInfo::ID);
101 AU.setPreservesAll();
105 struct Exprs : public FunctionPass {
106 const char *getPassName() const { return "Expression Printer"; }
108 static void doit(Function &F) {
109 std::cout << "Classified expressions for: " << F.getName() << "\n";
110 for (inst_iterator I = inst_begin(F), E = inst_end(F); I != E; ++I) {
113 if ((*I)->getType() == Type::VoidTy) continue;
114 analysis::ExprType R = analysis::ClassifyExpression(*I);
115 if (R.Var == *I) continue; // Doesn't tell us anything
117 std::cout << "\t\tExpr =";
119 case analysis::ExprType::ScaledLinear:
120 WriteAsOperand(std::cout << "(", (Value*)R.Scale) << " ) *";
122 case analysis::ExprType::Linear:
123 WriteAsOperand(std::cout << "(", R.Var) << " )";
124 if (R.Offset == 0) break;
125 else std::cout << " +";
127 case analysis::ExprType::Constant:
128 if (R.Offset) WriteAsOperand(std::cout, (Value*)R.Offset);
129 else std::cout << " 0";
135 virtual void getAnalysisUsage(AnalysisUsage &AU) const {
136 AU.setPreservesAll();
141 struct ModulePassPrinter : public Pass {
143 ModulePassPrinter(Pass *PI) : PassToPrint(PI) {}
145 virtual bool run(Module &M) {
146 std::cout << "Printing Analysis info for Pass "
147 << PassToPrint->getPassName() << ":\n";
148 PassToPrint->print(std::cout, &M);
150 // Get and print pass...
155 struct FunctionPassPrinter : public FunctionPass {
156 const PassInfo *PassToPrint;
157 FunctionPassPrinter(const PassInfo *PI) : PassToPrint(PI) {}
159 virtual bool runOnFunction(Function &F) {
160 std::cout << "Printing Analysis info for function '" << F.getName()
161 << "': Pass " << PassToPrint->getPassName() << ":\n";
162 getAnalysis<Pass>(PassToPrint).print(std::cout, F.getParent());
164 // Get and print pass...
168 virtual void getAnalysisUsage(AnalysisUsage &AU) const {
169 AU.addRequired(PassToPrint);
170 AU.setPreservesAll();
174 struct BasicBlockPassPrinter : public BasicBlockPass {
175 const PassInfo *PassToPrint;
176 BasicBlockPassPrinter(const PassInfo *PI) : PassToPrint(PI) {}
178 virtual bool runOnBasicBlock(BasicBlock &BB) {
179 std::cout << "Printing Analysis info for BasicBlock '" << BB.getName()
180 << "': Pass " << PassToPrint->getPassName() << ":\n";
181 getAnalysis<Pass>(PassToPrint).print(std::cout, BB.getParent()->getParent());
183 // Get and print pass...
187 virtual void getAnalysisUsage(AnalysisUsage &AU) const {
188 AU.addRequired(PassToPrint);
189 AU.setPreservesAll();
196 static cl::opt<std::string>
197 InputFilename(cl::Positional, cl::desc("<input file>"), cl::init("-"),
198 cl::value_desc("filename"));
200 static cl::opt<bool> Quiet("q", cl::desc("Don't print analysis pass names"));
201 static cl::alias QuietA("quiet", cl::desc("Alias for -q"),
202 cl::aliasopt(Quiet));
204 // The AnalysesList is automatically populated with registered Passes by the
207 static cl::list<const PassInfo*, bool,
208 FilteredPassNameParser<PassInfo::Analysis> >
209 AnalysesList(cl::desc("Analyses available:"));
212 int main(int argc, char **argv) {
213 cl::ParseCommandLineOptions(argc, argv, " llvm analysis printer tool\n");
217 CurMod = ParseBytecodeFile(InputFilename);
218 if (!CurMod && !(CurMod = ParseAssemblyFile(InputFilename))){
219 std::cerr << "Input file didn't read correctly.\n";
222 } catch (const ParseException &E) {
223 std::cerr << E.getMessage() << "\n";
227 // Create a PassManager to hold and optimize the collection of passes we are
232 // Create a new optimization pass for each one specified on the command line
233 for (unsigned i = 0; i < AnalysesList.size(); ++i) {
234 const PassInfo *Analysis = AnalysesList[i];
236 if (Analysis->getNormalCtor()) {
237 Pass *P = Analysis->getNormalCtor()();
240 if (BasicBlockPass *BBP = dynamic_cast<BasicBlockPass*>(P))
241 Passes.add(new BasicBlockPassPrinter(Analysis));
242 else if (FunctionPass *FP = dynamic_cast<FunctionPass*>(P))
243 Passes.add(new FunctionPassPrinter(Analysis));
245 Passes.add(new ModulePassPrinter(P));
248 cerr << "Cannot create pass: " << Analysis->getPassName() << "\n";