https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79723
Bug ID: 79723
Summary: Another case of dropped gs: prefix
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: me at manueljacob dot de
CC: rguenth at gcc dot gnu.org
Target Milestone: ---
void memset_pattern_seg_gs(unsigned char * __seg_gs *s, long n) {
for (long i = 0; i < n; ++i)
s[i] = 0;
}
On x86-64, gcc -O3 emits this instruction, missing the gs: prefix:
movaps %xmm0, -16(%rdx)
It works when replacing "unsigned char *" with "long", even though they have
the same size and alignment.
