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).