[Bug c/11897] New: internal compiler error: in gen_nop_type, at config/ia64/ia64.c:6929

["eranian at hpl dot hp dot com" <gcc-bugzilla at gcc dot gnu dot org>]

PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11897

           Summary: internal compiler error: in gen_nop_type, at
                    config/ia64/ia64.c:6929
           Product: gcc
           Version: 3.3
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: eranian at hpl dot hp dot com
                CC: gcc-bugs at gcc dot gnu dot org
 GCC build triplet: gcc version 3.3 20030415 (Debian prerelease)
  GCC host triplet: ia64-linux
GCC target triplet: ia64-linux

Gcc-3.3 and gcc-3.2 get a fatal error compiling the certain versions
of the linux-2.4.21 kernel for the arch/ia64/m/init.c file.

The compiler error message is:
internal compiler error: in gen_nop_type, at config/ia64/ia64.c:6929

The compiler is invoked as follows:
$ gcc-3.3 -D__KERNEL__ -I/data2/eranian/suse/build.2421-perfmon/include -Wall
-Wstrict-prototypes -Wno-trigraphs -O3 -fno-strict-aliasing -fno-common
-fomit-frame-pointer -pipe -ffixed-r13 -mfixed-range=f10-f15,f32-f127
-falign-functions=32 -frename-registers --param max-inline-insns=5000
-mconstant-gp -nostdinc -iwithprefix include -DKBUILD_BASENAME=init
-DEXPORT_SYMTAB -c t.c

Dropping the optimization level to -O1 fixes the problem for both gcc3.2 and 3.3.

The small test programs is as follows:

// -- cut here
typedef unsigned long __u64;
typedef struct { unsigned long pte; } pte_t;
typedef struct { unsigned long pgprot; } pgprot_t;

typedef union ia64_va {
        struct {
                unsigned long off : 61;
                unsigned long reg : 3;
        } f;
        unsigned long l;
        void *p;
} ia64_va;

extern void panic(const char * fmt, ...);


static inline void
ia64_set_rr (__u64 reg_bits, __u64 rr_val)
{
        asm volatile ("mov rr[%0]=%1" :: "r"(reg_bits), "r"(rr_val) : "memory");
}

static inline void
ia64_itr (__u64 target_mask, __u64 tr_num,
          __u64 vmaddr, __u64 pte,
          __u64 log_page_size)
{
        asm volatile ("mov cr.itir=%0" :: "r"(log_page_size << 2) : "memory");
        asm volatile ("mov cr.ifa=%0;;" :: "r"(vmaddr) : "memory");
        if (target_mask & 0x1)
                asm volatile ("itr.i itr[%0]=%1"
                                      :: "r"(tr_num), "r"(pte) : "memory");
        if (target_mask & 0x2)
                asm volatile (";;itr.d dtr[%0]=%1"
                                      :: "r"(tr_num), "r"(pte) : "memory");
}

static inline void
ia64_srlz_i (void)
{
        asm volatile (";; srlz.i ;;" ::: "memory");
}

void __attribute__ ((__section__ (".text.init")))
ia64_mmu_init (void *my_cpu_data)
{
        unsigned long rid, impl_va_bits = 0;


        rid = (((0) << 3) | (0xc000000000000000 >> 61));
        ia64_set_rr(0xc000000000000000, (rid << 8) | (24 << 2));

        rid = (((0) << 3) | ((0xa000000000000000 + 3*(1UL << 14)) >> 61));
        ia64_set_rr((0xa000000000000000 + 3*(1UL << 14)), (rid << 8) | (14 << 2)
| 1);

	ia64_srlz_i();

        ia64_itr(0x2, 1, (0xa000000000000000 + 2*(1UL << 14)),
                 ((({ pte_t __pte; ((__pte).pte) = ({ia64_va _v; asm("tpa %0=%1"
: "=r"(_v.l) : "r"(my_cpu_data)); _v.l;}) + ((((pgprot_t) { ((((unsigned
long)(1)) << 52) | (1 << 5) | (1 << 0) | (1 << 6) | (0x0 << 2) | (0 << 7) | (3
<< 9)) } )).pgprot); __pte; })).pte), 14);

        if (impl_va_bits < 51 || impl_va_bits > 61)
                panic("CPU has bogus IMPL_VA_MSB value of %lu!\n", impl_va_bits
- 1);

}