1 //===- llvm/Support/PassNameParser.h ----------------------------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file the PassNameParser and FilteredPassNameParser<> classes, which are
11 // used to add command line arguments to a utility for all of the passes that
12 // have been registered into the system.
14 // The PassNameParser class adds ALL passes linked into the system (that are
15 // creatable) as command line arguments to the tool (when instantiated with the
16 // appropriate command line option template). The FilteredPassNameParser<>
17 // template is used for the same purposes as PassNameParser, except that it only
18 // includes passes that have a PassType that are compatible with the filter
19 // (which is the template argument).
21 //===----------------------------------------------------------------------===//
23 #ifndef LLVM_SUPPORT_PASS_NAME_PARSER_H
24 #define LLVM_SUPPORT_PASS_NAME_PARSER_H
26 #include "llvm/Support/CommandLine.h"
27 #include "llvm/Support/ErrorHandling.h"
28 #include "llvm/Pass.h"
34 //===----------------------------------------------------------------------===//
35 // PassNameParser class - Make use of the pass registration mechanism to
36 // automatically add a command line argument to opt for each pass.
38 class PassNameParser : public PassRegistrationListener,
39 public cl::parser<const PassInfo*> {
42 PassNameParser() : Opt(0) {}
44 void initialize(cl::Option &O) {
46 cl::parser<const PassInfo*>::initialize(O);
48 // Add all of the passes to the map that got initialized before 'this' did.
52 // ignorablePassImpl - Can be overriden in subclasses to refine the list of
53 // which passes we want to include.
55 virtual bool ignorablePassImpl(const PassInfo *P) const { return false; }
57 inline bool ignorablePass(const PassInfo *P) const {
58 // Ignore non-selectable and non-constructible passes! Ignore
60 return P->getPassArgument() == 0 || *P->getPassArgument() == 0 ||
61 P->getNormalCtor() == 0 || ignorablePassImpl(P);
64 // Implement the PassRegistrationListener callbacks used to populate our map
66 virtual void passRegistered(const PassInfo *P) {
67 if (ignorablePass(P) || !Opt) return;
68 if (findOption(P->getPassArgument()) != getNumOptions()) {
69 cerr << "Two passes with the same argument (-"
70 << P->getPassArgument() << ") attempted to be registered!\n";
73 addLiteralOption(P->getPassArgument(), P, P->getPassName());
75 virtual void passEnumerate(const PassInfo *P) { passRegistered(P); }
77 // ValLessThan - Provide a sorting comparator for Values elements...
78 typedef std::pair<const char*,
79 std::pair<const PassInfo*, const char*> > ValType;
80 static bool ValLessThan(const ValType &VT1, const ValType &VT2) {
81 return std::string(VT1.first) < std::string(VT2.first);
84 // printOptionInfo - Print out information about this option. Override the
85 // default implementation to sort the table before we print...
86 virtual void printOptionInfo(const cl::Option &O, size_t GlobalWidth) const {
87 PassNameParser *PNP = const_cast<PassNameParser*>(this);
88 std::sort(PNP->Values.begin(), PNP->Values.end(), ValLessThan);
89 cl::parser<const PassInfo*>::printOptionInfo(O, GlobalWidth);
93 ///===----------------------------------------------------------------------===//
94 /// FilteredPassNameParser class - Make use of the pass registration
95 /// mechanism to automatically add a command line argument to opt for
96 /// each pass that satisfies a filter criteria. Filter should return
97 /// true for passes to be registered as command-line options.
99 template<typename Filter>
100 class FilteredPassNameParser : public PassNameParser {
105 bool ignorablePassImpl(const PassInfo *P) const { return !filter(*P); }
108 ///===----------------------------------------------------------------------===//
109 /// PassArgFilter - A filter for use with PassNameFilterParser that only
110 /// accepts a Pass whose Arg matches certain strings.
114 /// extern const char AllowedPassArgs[] = "-anders_aa -dse";
119 /// FilteredPassNameParser<PassArgFilter<AllowedPassArgs> > >
120 /// PassList(cl::desc("Passes available:"));
122 /// Only the -anders_aa and -dse options will be available to the user.
124 template<const char *Args>
125 class PassArgFilter {
127 bool operator()(const PassInfo &P) const {
128 return(std::strstr(Args, P.getPassArgument()));
132 } // End llvm namespace