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/Method.h"
16 #include "llvm/Bytecode/Reader.h"
17 #include "llvm/Assembly/Parser.h"
18 #include "llvm/Support/CommandLine.h"
19 #include "llvm/Analysis/Writer.h"
21 #include "llvm/Analysis/InstForest.h"
22 #include "llvm/Analysis/Dominators.h"
23 #include "llvm/Analysis/IntervalPartition.h"
24 #include "llvm/Analysis/Expressions.h"
25 #include "llvm/Analysis/CallGraph.h"
26 #include "llvm/Analysis/FindUnsafePointerTypes.h"
29 static void PrintMethod(Method *M) {
33 static void PrintIntervalPartition(Method *M) {
34 cout << cfg::IntervalPartition(M);
37 static void PrintClassifiedExprs(Method *M) {
38 cout << "Classified expressions for: " << M->getName() << endl;
39 Method::inst_iterator I = M->inst_begin(), E = M->inst_end();
43 if ((*I)->getType() == Type::VoidTy) continue;
44 analysis::ExprType R = analysis::ClassifyExpression(*I);
45 if (R.Var == *I) continue; // Doesn't tell us anything
49 case analysis::ExprType::ScaledLinear:
50 WriteAsOperand(cout << "(", (Value*)R.Scale) << " ) *";
52 case analysis::ExprType::Linear:
53 WriteAsOperand(cout << "(", R.Var) << " )";
54 if (R.Offset == 0) break;
57 case analysis::ExprType::Constant:
58 if (R.Offset) WriteAsOperand(cout, (Value*)R.Offset); else cout << " 0";
65 static void PrintInstForest(Method *M) {
66 cout << analysis::InstForest<char>(M);
68 static void PrintCallGraph(Module *M) {
69 cout << cfg::CallGraph(M);
72 static void PrintUnsafePtrTypes(Module *M) {
73 FindUnsafePointerTypes FUPT;
75 FUPT.printResults(M, cout);
78 static void PrintDominatorSets(Method *M) {
79 cout << cfg::DominatorSet(M);
81 static void PrintImmediateDominators(Method *M) {
82 cout << cfg::ImmediateDominators(M);
84 static void PrintDominatorTree(Method *M) {
85 cout << cfg::DominatorTree(M);
87 static void PrintDominanceFrontier(Method *M) {
88 cout << cfg::DominanceFrontier(M);
91 static void PrintPostDominatorSets(Method *M) {
92 cout << cfg::DominatorSet(M, true);
94 static void PrintImmediatePostDoms(Method *M) {
95 cout << cfg::ImmediateDominators(cfg::DominatorSet(M, true));
97 static void PrintPostDomTree(Method *M) {
98 cout << cfg::DominatorTree(cfg::DominatorSet(M, true));
100 static void PrintPostDomFrontier(Method *M) {
101 cout << cfg::DominanceFrontier(cfg::DominatorSet(M, true));
106 PassDone, // Unique Marker
107 print, intervals, exprclassify, instforest, callgraph, unsafepointertypes,
108 domset, idom, domtree, domfrontier,
109 postdomset, postidom, postdomtree, postdomfrontier,
112 cl::String InputFilename ("", "Load <arg> file to analyze", cl::NoFlags, "-");
113 cl::Flag Quiet ("q", "Don't print analysis pass names");
114 cl::Alias QuietA ("quiet", "Alias for -q", cl::NoFlags, Quiet);
115 cl::EnumList<enum Ans> AnalysesList(cl::NoFlags,
116 clEnumVal(print , "Print each Method"),
117 clEnumVal(intervals , "Print Interval Partitions"),
118 clEnumVal(exprclassify , "Classify Expressions"),
119 clEnumVal(instforest , "Print Instruction Forest"),
120 clEnumVal(callgraph , "Print Call Graph"),
121 clEnumVal(unsafepointertypes, "Print Unsafe Pointer Types"),
123 clEnumVal(domset , "Print Dominator Sets"),
124 clEnumVal(idom , "Print Immediate Dominators"),
125 clEnumVal(domtree , "Print Dominator Tree"),
126 clEnumVal(domfrontier , "Print Dominance Frontier"),
128 clEnumVal(postdomset , "Print Postdominator Sets"),
129 clEnumVal(postidom , "Print Immediate Postdominators"),
130 clEnumVal(postdomtree , "Print Post Dominator Tree"),
131 clEnumVal(postdomfrontier, "Print Postdominance Frontier"),
136 void (*AnPtr)(Method *M);
138 { print , PrintMethod },
139 { intervals , PrintIntervalPartition },
140 { exprclassify , PrintClassifiedExprs },
141 { instforest , PrintInstForest },
143 { domset , PrintDominatorSets },
144 { idom , PrintImmediateDominators },
145 { domtree , PrintDominatorTree },
146 { domfrontier , PrintDominanceFrontier },
148 { postdomset , PrintPostDominatorSets },
149 { postidom , PrintImmediatePostDoms },
150 { postdomtree , PrintPostDomTree },
151 { postdomfrontier, PrintPostDomFrontier },
154 pair<enum Ans, void (*)(Module *)> ModAnTable[] = {
155 pair<enum Ans, void (*)(Module *)>(callgraph , PrintCallGraph),
156 pair<enum Ans, void (*)(Module *)>(unsafepointertypes, PrintUnsafePtrTypes),
161 int main(int argc, char **argv) {
162 cl::ParseCommandLineOptions(argc, argv, " llvm analysis printer tool\n");
164 Module *C = ParseBytecodeFile(InputFilename);
165 if (!C && !(C = ParseAssemblyFile(InputFilename))) {
166 cerr << "Input file didn't read correctly.\n";
170 // Loop over all of the analyses looking for module level analyses to run...
171 for (unsigned i = 0; i < AnalysesList.size(); ++i) {
172 enum Ans AnalysisPass = AnalysesList[i];
174 for (unsigned j = 0; j < sizeof(ModAnTable)/sizeof(ModAnTable[0]); ++j) {
175 if (ModAnTable[j].first == AnalysisPass) {
177 cerr << "Running: " << AnalysesList.getArgDescription(AnalysisPass)
178 << " analysis on module!\n";
179 ModAnTable[j].second(C);
180 AnalysesList[i] = PassDone; // Mark pass as complete so that we don't
181 break; // get an error later
186 // Loop over all of the methods in the module...
187 for (Module::iterator I = C->begin(), E = C->end(); I != E; ++I) {
189 if (M->isExternal()) continue;
191 for (unsigned i = 0; i < AnalysesList.size(); ++i) {
192 enum Ans AnalysisPass = AnalysesList[i];
193 if (AnalysisPass == PassDone) continue; // Don't rerun module analyses
195 // Loop over all of the analyses to be run...
197 for (j = 0; j < sizeof(MethAnTable)/sizeof(MethAnTable[0]); ++j) {
198 if (AnalysisPass == MethAnTable[j].AnID) {
200 cerr << "Running: " << AnalysesList.getArgDescription(AnalysisPass)
201 << " analysis on '" << ((Value*)M)->getName() << "'!\n";
202 MethAnTable[j].AnPtr(M);
206 if (j == sizeof(MethAnTable)/sizeof(MethAnTable[0]))
207 cerr << "Analysis tables inconsistent!\n";