[Bug c/13315] New: internal compiler error: Segmentation fault for -march=k6

["development--gcc dot gnu dot org at medium dot net" <gcc-bugzilla at gcc dot gnu dot org>]

Hello,

when compiling the Linux kernel, I encountered following bug:



plato:/usr/src/linux/fs/nls # gcc -v -save-temps -O2 -march=k6 -c -o nls_cp437.o
nls_cp437.preprocessed.v5.c
Reading specs from /usr/lib/gcc-lib/i586-suse-linux/3.3.1/specs
Configured with: ../configure --enable-threads=posix --prefix=/usr
--with-local-prefix=/usr/local --infodir=/usr/share/info --mandir=/usr/share/man
--libdir=/usr/lib --enable-languages=c,c++,f77,objc,java,ada --disable-checking
--enable-libgcj --with-gxx-include-dir=/usr/include/g++ --with-slibdir=/lib
--with-system-zlib --enable-shared --enable-__cxa_atexit i586-suse-linux
Thread model: posix
gcc version 3.3.1 (SuSE Linux)
 /usr/lib/gcc-lib/i586-suse-linux/3.3.1/cc1 -E -quiet -v -D__GNUC__=3
-D__GNUC_MINOR__=3 -D__GNUC_PATCHLEVEL__=1 nls_cp437.preprocessed.v5.c -march=k6
-O2 nls_cp437.preprocessed.v5.i
ignoring nonexistent directory "/usr/i586-suse-linux/include"
#include "..." search starts here:
#include <...> search starts here:
 /usr/local/include
 /usr/lib/gcc-lib/i586-suse-linux/3.3.1/include
 /usr/include
End of search list.
 /usr/lib/gcc-lib/i586-suse-linux/3.3.1/cc1 -fpreprocessed
nls_cp437.preprocessed.v5.i -quiet -dumpbase nls_cp437.preprocessed.v5.c
-march=k6 -auxbase-strip nls_cp437.o -O2 -version -o nls_cp437.preprocessed.v5.s
GNU C version 3.3.1 (SuSE Linux) (i586-suse-linux)
        compiled by GNU C version 3.3.1 (SuSE Linux).
GGC heuristics: --param ggc-min-expand=51 --param ggc-min-heapsize=39987
<command line>: In function `char2uni':
<command line>:96: internal compiler error: Segmentation fault
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://www.suse.de/feedback> for instructions.


The sourcecode "nls_cp437.preprocessed.v5.c" is:


# 1 "nls_cp437.c"
# 1 "<built-in>"
# 1 "<command line>"

typedef unsigned short __u16;


typedef __u16 wchar_t;

static wchar_t charset2uni[256] = {

        0x0000, 0x0001, 0x0002, 0x0003,
        0x0004, 0x0005, 0x0006, 0x0007,
        0x0008, 0x0009, 0x000a, 0x000b,
        0x000c, 0x000d, 0x000e, 0x000f,

        0x0010, 0x0011, 0x0012, 0x0013,
        0x0014, 0x0015, 0x0016, 0x0017,
        0x0018, 0x0019, 0x001a, 0x001b,
        0x001c, 0x001d, 0x001e, 0x001f,

        0x0020, 0x0021, 0x0022, 0x0023,
        0x0024, 0x0025, 0x0026, 0x0027,
        0x0028, 0x0029, 0x002a, 0x002b,
        0x002c, 0x002d, 0x002e, 0x002f,

        0x0030, 0x0031, 0x0032, 0x0033,
        0x0034, 0x0035, 0x0036, 0x0037,
        0x0038, 0x0039, 0x003a, 0x003b,
        0x003c, 0x003d, 0x003e, 0x003f,

        0x0040, 0x0041, 0x0042, 0x0043,
        0x0044, 0x0045, 0x0046, 0x0047,
        0x0048, 0x0049, 0x004a, 0x004b,
        0x004c, 0x004d, 0x004e, 0x004f,

        0x0050, 0x0051, 0x0052, 0x0053,
        0x0054, 0x0055, 0x0056, 0x0057,
        0x0058, 0x0059, 0x005a, 0x005b,
        0x005c, 0x005d, 0x005e, 0x005f,

        0x0060, 0x0061, 0x0062, 0x0063,
        0x0064, 0x0065, 0x0066, 0x0067,
        0x0068, 0x0069, 0x006a, 0x006b,
        0x006c, 0x006d, 0x006e, 0x006f,

        0x0070, 0x0071, 0x0072, 0x0073,
        0x0074, 0x0075, 0x0076, 0x0077,
        0x0078, 0x0079, 0x007a, 0x007b,
        0x007c, 0x007d, 0x007e, 0x007f,

        0x00c7, 0x00fc, 0x00e9, 0x00e2,
        0x00e4, 0x00e0, 0x00e5, 0x00e7,
        0x00ea, 0x00eb, 0x00e8, 0x00ef,
        0x00ee, 0x00ec, 0x00c4, 0x00c5,

        0x00c9, 0x00e6, 0x00c6, 0x00f4,
        0x00f6, 0x00f2, 0x00fb, 0x00f9,
        0x00ff, 0x00d6, 0x00dc, 0x00a2,
        0x00a3, 0x00a5, 0x20a7, 0x0192,

        0x00e1, 0x00ed, 0x00f3, 0x00fa,
        0x00f1, 0x00d1, 0x00aa, 0x00ba,
        0x00bf, 0x2310, 0x00ac, 0x00bd,
        0x00bc, 0x00a1, 0x00ab, 0x00bb,

        0x2591, 0x2592, 0x2593, 0x2502,
        0x2524, 0x2561, 0x2562, 0x2556,
        0x2555, 0x2563, 0x2551, 0x2557,
        0x255d, 0x255c, 0x255b, 0x2510,

        0x2514, 0x2534, 0x252c, 0x251c,
        0x2500, 0x253c, 0x255e, 0x255f,
        0x255a, 0x2554, 0x2569, 0x2566,
        0x2560, 0x2550, 0x256c, 0x2567,

        0x2568, 0x2564, 0x2565, 0x2559,
        0x2558, 0x2552, 0x2553, 0x256b,
        0x256a, 0x2518, 0x250c, 0x2588,
        0x2584, 0x258c, 0x2590, 0x2580,

        0x03b1, 0x00df, 0x0393, 0x03c0,
        0x03a3, 0x03c3, 0x00b5, 0x03c4,
        0x03a6, 0x0398, 0x03a9, 0x03b4,
        0x221e, 0x03c6, 0x03b5, 0x2229,

        0x2261, 0x00b1, 0x2265, 0x2264,
        0x2320, 0x2321, 0x00f7, 0x2248,
        0x00b0, 0x2219, 0x00b7, 0x221a,
        0x207f, 0x00b2, 0x25a0, 0x00a0,
};

static int char2uni(const unsigned char *rawstring, int boundlen, wchar_t *uni)
{
        *uni = charset2uni[*rawstring];
        if (*uni == 0x0000)
                return -22;
        return 1;
}



The segmentation fault is always reproducible. It disappears if you set
"-march=i586".

-- 
           Summary: internal compiler error: Segmentation fault for -
                    march=k6
           Product: gcc
           Version: 3.3.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: development--gcc dot gnu dot org at medium dot net
                CC: gcc-bugs at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13315