[Bug c++/39014] New: g++ 4.3.1 ICE with -fipa-pta

[warren dot armstrong at anu dot edu dot au]

I ran across the following while compiling a C++ source of mine:

borked.cpp: In function 'void std::__introsort_loop(_RandomAccessIterator,
_RandomAccessIterator, _Size, _Compare) [with _RandomAccessIterator =
__gnu_cxx::__normal_iterator<triple<long long int, long long int, double>*,
std::vector<triple<long long int, long long int, double>,
std::allocator<triple<long long int, long long int, double> > > >, _Size = int,
_Compare = bool (*)(mm_entry_t, mm_entry_t)]':
borked.cpp:51: internal compiler error: Segmentation fault
Please submit a full bug report,
with preprocessed source if appropriate.

I have reduced the source code as much as possible and pasted it below (I
couldn't see a way to make an attachment).  I haven't preprocessed it, but the
only headers involved are standard C++ headers, and there are no complicated
#defines.

I invoked the compiler as:

g++ -c -fipa-pta -o bork.o borked.cpp

If I drop -fipa-pta, everything works.

My compiler version is:

gcc (Gentoo 4.3.1-r1 p1.1) 4.3.1

(I was not sure whether to file a report with Gentoo or here.  I chose here as
I doubt Gentoo have fiddled with the implementation of -fipa-pta.  Apologies if
I guessed wrong.)

---------------------------
Source:
---------------------------
#include <vector>
#include <stdint.h>
#include <algorithm>

template< class T1, class T2, class T3 >
class triple{
 public:
    T1 first;
    T2 second;
    T3 third;

    triple() : first(), second(), third()
        {}

    triple( T1 a, T2 b, T3 c ) : first(a), second(b), third(c)
        {}
};


typedef int64_t sindex_t;
typedef uint64_t entry_t;
typedef double value_t;

typedef triple<sindex_t, sindex_t, value_t>             mm_entry_t;
typedef triple<sindex_t, sindex_t, sindex_t >               mm_size_t;
typedef std::vector< mm_entry_t >             mm_entries_t;
typedef std::pair< mm_size_t, mm_entries_t > mm_matrix_t;


#define get_row( entry ) (entry).first
#define get_col( entry ) (entry).second

bool compare( mm_entry_t a, mm_entry_t b ){
    if ( get_row(a) < get_row(b) )
        return true;

    if ( get_row(a) > get_row(b) )
        return false;

    if ( get_col(a) < get_col(b) )
        return true;

    return false;
}

int main( int argc, char* argv[] ){
    mm_matrix_t matrix;

    std::sort( matrix.second.begin(), matrix.second.end(), compare );

    return 0;
}


-- 
           Summary: g++ 4.3.1 ICE with -fipa-pta
           Product: gcc
           Version: 4.3.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: warren dot armstrong at anu dot edu dot au
 GCC build triplet: --build=i686-pc-linux-gnu
  GCC host triplet: --host=i686-pc-linux-gnu
GCC target triplet: Same as host


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39014