1//===- llvm/Support/PassNameParser.h ----------------------------*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file contains the PassNameParser and FilteredPassNameParser<> classes, 11// which are used to add command line arguments to a utility for all of the 12// passes that have been registered into the system. 13// 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). 20// 21//===----------------------------------------------------------------------===// 22 23#ifndef LLVM_SUPPORT_PASSNAMEPARSER_H 24#define LLVM_SUPPORT_PASSNAMEPARSER_H 25 26#include "llvm/ADT/STLExtras.h" 27#include "llvm/Pass.h" 28#include "llvm/Support/CommandLine.h" 29#include "llvm/Support/ErrorHandling.h" 30#include "llvm/Support/raw_ostream.h" 31#include <cstring> 32 33namespace llvm { 34 35//===----------------------------------------------------------------------===// 36// PassNameParser class - Make use of the pass registration mechanism to 37// automatically add a command line argument to opt for each pass. 38// 39class PassNameParser : public PassRegistrationListener, 40 public cl::parser<const PassInfo*> { 41 cl::Option *Opt; 42public: 43 PassNameParser() : Opt(0) {} 44 virtual ~PassNameParser(); 45 46 void initialize(cl::Option &O) { 47 Opt = &O; 48 cl::parser<const PassInfo*>::initialize(O); 49 50 // Add all of the passes to the map that got initialized before 'this' did. 51 enumeratePasses(); 52 } 53 54 // ignorablePassImpl - Can be overriden in subclasses to refine the list of 55 // which passes we want to include. 56 // 57 virtual bool ignorablePassImpl(const PassInfo *P) const { return false; } 58 59 inline bool ignorablePass(const PassInfo *P) const { 60 // Ignore non-selectable and non-constructible passes! Ignore 61 // non-optimizations. 62 return P->getPassArgument() == 0 || *P->getPassArgument() == 0 || 63 P->getNormalCtor() == 0 || ignorablePassImpl(P); 64 } 65 66 // Implement the PassRegistrationListener callbacks used to populate our map 67 // 68 virtual void passRegistered(const PassInfo *P) { 69 if (ignorablePass(P) || !Opt) return; 70 if (findOption(P->getPassArgument()) != getNumOptions()) { 71 errs() << "Two passes with the same argument (-" 72 << P->getPassArgument() << ") attempted to be registered!\n"; 73 llvm_unreachable(0); 74 } 75 addLiteralOption(P->getPassArgument(), P, P->getPassName()); 76 } 77 virtual void passEnumerate(const PassInfo *P) { passRegistered(P); } 78 79 // printOptionInfo - Print out information about this option. Override the 80 // default implementation to sort the table before we print... 81 virtual void printOptionInfo(const cl::Option &O, size_t GlobalWidth) const { 82 PassNameParser *PNP = const_cast<PassNameParser*>(this); 83 array_pod_sort(PNP->Values.begin(), PNP->Values.end(), ValLessThan); 84 cl::parser<const PassInfo*>::printOptionInfo(O, GlobalWidth); 85 } 86 87private: 88 // ValLessThan - Provide a sorting comparator for Values elements... 89 static int ValLessThan(const PassNameParser::OptionInfo *VT1, 90 const PassNameParser::OptionInfo *VT2) { 91 return std::strcmp(VT1->Name, VT2->Name); 92 } 93}; 94 95///===----------------------------------------------------------------------===// 96/// FilteredPassNameParser class - Make use of the pass registration 97/// mechanism to automatically add a command line argument to opt for 98/// each pass that satisfies a filter criteria. Filter should return 99/// true for passes to be registered as command-line options. 100/// 101template<typename Filter> 102class FilteredPassNameParser : public PassNameParser { 103private: 104 Filter filter; 105 106public: 107 bool ignorablePassImpl(const PassInfo *P) const { return !filter(*P); } 108}; 109 110///===----------------------------------------------------------------------===// 111/// PassArgFilter - A filter for use with PassNameFilterParser that only 112/// accepts a Pass whose Arg matches certain strings. 113/// 114/// Use like this: 115/// 116/// extern const char AllowedPassArgs[] = "-anders_aa -dse"; 117/// 118/// static cl::list< 119/// const PassInfo*, 120/// bool, 121/// FilteredPassNameParser<PassArgFilter<AllowedPassArgs> > > 122/// PassList(cl::desc("Passes available:")); 123/// 124/// Only the -anders_aa and -dse options will be available to the user. 125/// 126template<const char *Args> 127class PassArgFilter { 128public: 129 bool operator()(const PassInfo &P) const { 130 return(std::strstr(Args, P.getPassArgument())); 131 } 132}; 133 134} // End llvm namespace 135 136#endif 137