[Bug target/48598] New: x86 backend fails to properly mark memory alignment

[hjl.tools at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48598

           Summary: x86 backend fails to properly mark memory alignment
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: hjl.tools@gmail.com


[hjl@gnu-6 pr1000]$ cat p.i
extern const unsigned char __popcount_tab[256];
int
__popcountdi2 (unsigned long long x)
{
  int i, ret = 0;

  for (i = 0; i < (8 * 8); i += 8)
    ret += __popcount_tab[(x >> i) & 0xff];

  return ret;
}
[hjl@gnu-6 pr1000]$ gcc  -O2 -fPIC  p.i -S -da       

(insn 19 18 20 (set (reg/f:DI 108)
        (mem/u/c:DI (const:DI (unspec:DI [
                        (symbol_ref:DI ("__popcount_tab") [flags 0x40] 
<var_dec
l 0x7ffff210e000 __popcount_tab>)
                    ] UNSPEC_GOTPCREL)) [2 S8 A8])) p.i:8 -1
     (nil))

__popcount_tab should be marked with 64bit alignment.