[Bug tree-optimization/64098] New: ICE isl_ctx.c:172: isl_ctx freed, but some objects still referenced

["rguenth at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64098

            Bug ID: 64098
           Summary: ICE isl_ctx.c:172: isl_ctx freed, but some objects
                    still referenced
           Product: gcc
           Version: 5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: rguenth at gcc dot gnu.org
                CC: mircea.namolaru at inria dot fr

#include <stdio.h>
#include <endian.h>
#include <inttypes.h>

uint16_t dhcp_packet_checksum(void * restrict buf, int len) {
          uint32_t sum;
          uint16_t * restrict check;
          int i;
          uint8_t * restrict odd;
          sum = 0;
          check = buf;

            for (i = 0; i < len / 2 ; i++)
                  sum += check[i];

          if (len & 0x01) {
                  odd = buf;
                  sum += odd[len - 1]; 
          }

          while (sum >> 16)
                  sum = (sum & 0xffff) + (sum >> 16);
          return ~sum;
  }

int main(void)

{
        const uint8_t buf[20] = {
                0x45, 0x00, 0x02, 0x40, 0x00, 0x00, 0x00, 0x00,
                0x40, 0x11, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                0xff, 0xff, 0xff, 0xff
        };


        return dhcp_packet_checksum(&buf, 20) == be16toh(0x78ae);

}


gcc-5 -Wall $(rpm --eval %optflags) -floop-unroll-and-jam test.c


isl_ctx.c:172: isl_ctx freed, but some objects still reference it
chk.c: In function âdhcp_packet_checksumâ:
chk.c:5:10: internal compiler error: Abortado
 uint16_t dhcp_packet_checksum(void * restrict buf, int len) {
          ^
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