[Bug c/60693] New: ICE on funny memcpy

[luto at mit dot edu]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60693

            Bug ID: 60693
           Summary: ICE on funny memcpy
           Product: gcc
           Version: 4.8.2
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: luto at mit dot edu

This little program:

int main()
{
  char buf[4096];
  memcpy(buf, (void *)0xffffffffff600000, 4096);

  return 0;
}

does this:

$ gcc ice.c
ice.c: In function ‘main’:
ice.c:4:3: warning: incompatible implicit declaration of built-in function
‘memcpy’ [enabled by default]
   memcpy(buf, (void *)0xffffffffff600000, 4096);
   ^
ice.c:4:9: internal compiler error: in ix86_copy_addr_to_reg, at
config/i386/i386.c:21886
   memcpy(buf, (void *)0xffffffffff600000, 4096);
         ^
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://bugzilla.redhat.com/bugzilla> for instructions.
Preprocessed source stored into /tmp/ccJqACry.out file, please attach this to
your bugreport.


This is gcc (GCC) 4.8.2 20131212 (Red Hat 4.8.2-7).