view gen/cl_helpers.h @ 1318:bac742d3a72d

Make sure this testcase keeps crashing with -O3. Recent optimization improvements made LLVM realize the store-to-null was unavoidable, so it deleted all of main() and replaced it with 'unreachable'. Because the body of main() no longer even contained a return instruction, calling it caused random code to be ran instead. This happened to be the code that links in the ModuleInfo on my machine, which then returned "successfully".
author Frits van Bommel <fvbommel wxs.nl>
date Sat, 09 May 2009 00:55:47 +0200
parents 3171f67ad006
children 40bd4a0d4870
line wrap: on
line source

#ifndef LDC_CL_HELPERS_H
#define LDC_CL_HELPERS_H

#include <string>

#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Compiler.h"

struct Array;

namespace opts {
    namespace cl = llvm::cl;
    
    /// Helper class for fancier options
    class FlagParser : public cl::parser<bool> {
        std::vector<std::pair<std::string, bool> > switches;
    public:
        template <class Opt>
        void initialize(Opt &O) {
            std::string Name = O.ArgStr;
            switches.push_back(make_pair("enable-" + Name, true));
            switches.push_back(make_pair("disable-" + Name, false));
            // Replace <foo> with -enable-<foo>
            O.ArgStr = switches[0].first.c_str();
        }
        
        bool parse(cl::Option &O, const char *ArgName, const std::string &ArgValue, bool &Val);
        
        void getExtraOptionNames(std::vector<const char*> &Names);
    };
    
    /// Helper class for options that set multiple flags
    class MultiSetter {
        std::vector<bool*> locations;
        bool invert;
        MultiSetter(bool); //not implemented, disable auto-conversion
    public:
        MultiSetter(bool invert, bool* p, ...) END_WITH_NULL;
        
        void operator=(bool val);
    };
    
    /// Helper class to fill Array with char* when given strings
    /// (Errors on empty strings)
    class ArrayAdapter {
        const char* name;
        Array** arrp;
    public:
        ArrayAdapter(const char* name_, Array*& arr) {
            name = name_;
            arrp = &arr;
            assert(name);
            assert(arrp);
        }
        
        void push_back(const char* cstr);
        
        void push_back(const std::string& str) {
            push_back(str.c_str());
        }
    };
    
    /// Helper class to allow use of a parser<bool> with BoolOrDefault
    class BoolOrDefaultAdapter {
        cl::boolOrDefault value;
    public:
        operator cl::boolOrDefault() {
            return value;
        }
        
        void operator=(cl::boolOrDefault val) {
            value = val;
        }
        
        void operator=(bool val) {
            *this = (val ? cl::BOU_TRUE : cl::BOU_FALSE);
        }
    };
}

#endif