https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91623
Bug ID: 91623
Summary: [7/8/9 Regression] -msse4.1 -O3 segfault in
/usr/lib/gcc/x86_64-pc-linux-gnu/8.3.0/include/smmintr
in.h:270:10
Product: gcc
Version: 9.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: soap at gentoo dot org
Target Milestone: ---
Created attachment 46793
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46793&action=edit
Minimum test case
Under certain conditions, GCC raises an ICE. I have used creduce to produce a
minimal example:
typedef long long a __attribute__((__vector_size__(16)));
typedef long long b __attribute__((__vector_size__(16)));
b c, e, g, h;
d;
const i;
j(k, l) {
if (d && 0 <= k - 1 && l)
m();
}
p() {
int f = 0;
c = (a){1};
b n = c;
g = (a){};
b o = g;
for (; f < i; ++f) {
b a = o == n;
h = a;
j(f, i);
o = e;
}
}
gcc-6.5.0 -msse4.1 -O3 -c test.c: PASS
gcc-6.5.0 -msse4.1 -O2 -c test.c: PASS
gcc-7.4.0 -msse4.1 -O3 -c test.c: FAIL
gcc-7.4.0 -msse4.1 -O2 -c test.c: PASS
gcc-8.3.0 -msse4.1 -O3 -c test.c: FAIL
gcc-8.3.0 -msse4.1 -O2 -c test.c: PASS
gcc-9.2.0 -msse4.1 -O3 -c test.c: FAIL
gcc-9.2.0 -msse4.1 -O2 -c test.c: PASS
In all failure cases I get the error
during RTL pass: expand
test.c: In function ‘p’:
test.c:10:1: internal compiler error: Segmentation fault
