[Bug libitm/56801] New: Internal Compiler Error when compiling relaxed transaction

[spear at cse dot lehigh.edu]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56801

             Bug #: 56801
           Summary: Internal Compiler Error when compiling relaxed
                    transaction
    Classification: Unclassified
           Product: gcc
           Version: 4.7.2
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: libitm
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: spear@cse.lehigh.edu


I am receiving the following error:
  internal compiler error: in expand_call_tm, at trans-mem.c:2280

When compiling a simple program.  The following test case is derived from
memcached 1.4.13:

// filename: testcase.c

#include <stdio.h>
#include <stdlib.h>

__attribute__((transaction_callable))
void slabs_adjust_mem_requested(unsigned int id, size_t old, size_t ntotal);

typedef struct {
    unsigned int size;
    unsigned int perslab;

    void *slots;
    unsigned int sl_curr;

    void *end_page_ptr;
    unsigned int end_page_free;

    unsigned int slabs;

    void **slab_list;
    unsigned int list_size;

    unsigned int killing;
    size_t requested;
} slabclass_t;

static slabclass_t slabclass[(200 + 1)];
static int power_largest;

void slabs_adjust_mem_requested(unsigned int id, size_t old, size_t ntotal)
{
    __transaction_relaxed {
    slabclass_t *p;
    if (id < 1 || id > power_largest) {
        fprintf(stderr, "Internal error! Invalid slab class\n");
        abort();
    }

    p = &slabclass[id];
    p->requested = p->requested - old + ntotal;
    }
}


Compilation line:

gcc -std=gnu11 -g -O2 -fgnu-tm -pthread -c testcase.c -o testcase.o