forked from OSchip/llvm-project
107 lines
3.0 KiB
C++
107 lines
3.0 KiB
C++
//===- ListWarnings.h - diagtool tool for printing warning flags ----------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file provides a diagtool tool that displays warning flags for
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// diagnostics.
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//
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//===----------------------------------------------------------------------===//
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#include "DiagTool.h"
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#include "clang/Basic/Diagnostic.h"
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#include "llvm/Support/Format.h"
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#include "llvm/ADT/StringMap.h"
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DEF_DIAGTOOL("list-warnings",
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"List warnings and their corresponding flags",
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ListWarnings)
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using namespace clang;
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namespace {
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struct Entry {
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llvm::StringRef DiagName;
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llvm::StringRef Flag;
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Entry(llvm::StringRef diagN, llvm::StringRef flag)
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: DiagName(diagN), Flag(flag) {}
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bool operator<(const Entry &x) const { return DiagName < x.DiagName; }
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};
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}
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static void printEntries(std::vector<Entry> &entries, llvm::raw_ostream &out) {
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for (std::vector<Entry>::iterator it = entries.begin(), ei = entries.end();
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it != ei; ++it) {
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out << " " << it->DiagName;
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if (!it->Flag.empty())
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out << " [-W" << it->Flag << "]";
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out << '\n';
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}
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}
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int ListWarnings::run(unsigned int argc, char **argv, llvm::raw_ostream &out) {
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llvm::IntrusiveRefCntPtr<DiagnosticIDs> Diags(new DiagnosticIDs);
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Diagnostic D(Diags);
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std::vector<Entry> Flagged, Unflagged;
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llvm::StringMap<std::vector<unsigned> > flagHistogram;
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for (DiagnosticIDs::diag_iterator di = DiagnosticIDs::diags_begin(),
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de = DiagnosticIDs::diags_end(); di != de; ++di) {
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unsigned diagID = di.getDiagID();
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if (DiagnosticIDs::isBuiltinNote(diagID))
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continue;
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if (!DiagnosticIDs::isBuiltinWarningOrExtension(diagID))
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continue;
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Entry entry(di.getDiagName(),
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DiagnosticIDs::getWarningOptionForDiag(diagID));
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if (entry.Flag.empty())
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Unflagged.push_back(entry);
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else {
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Flagged.push_back(entry);
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flagHistogram.GetOrCreateValue(entry.Flag).getValue().push_back(diagID);
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}
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}
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std::sort(Flagged.begin(), Flagged.end());
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std::sort(Unflagged.begin(), Unflagged.end());
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out << "Warnings with flags (" << Flagged.size() << "):\n";
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printEntries(Flagged, out);
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out << "Warnings without flags (" << Unflagged.size() << "):\n";
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printEntries(Unflagged, out);
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out << "\nSTATISTICS:\n\n";
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double percentFlagged = ((double) Flagged.size())
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/ (Flagged.size() + Unflagged.size()) * 100.0;
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out << " Percentage of warnings with flags: "
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<< llvm::format("%.4g",percentFlagged) << "%\n";
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out << " Number of unique flags: "
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<< flagHistogram.size() << '\n';
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double avgDiagsPerFlag = (double) Flagged.size() / flagHistogram.size();
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out << " Average number of diagnostics per flag: "
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<< llvm::format("%.4g", avgDiagsPerFlag) << '\n';
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out << '\n';
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return 0;
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}
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