https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111779
Bug ID: 111779
Summary: Fail to vectorize the struct include struct
Product: gcc
Version: 14.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: juzhe.zhong at rivai dot ai
Target Milestone: ---
#include <stdbool.h>
#include <assert.h>
struct C
{
int c;
int d;
bool f :1;
float e;
};
struct A
{
unsigned int a;
unsigned char c1, c2;
bool b1 : 1;
bool b2 : 1;
bool b3 : 1;
struct C b4;
};
void
foo (const struct A * __restrict x, int y)
{
int s = 0, i = 0;
for (i = 0; i < y; ++i)
{
const struct A a = x[i];
s += a.b4.f ? 1 : 0;
}
assert (s == 0);
//__builtin_abort ();
}
int
main ()
{
struct A x[100];
int i;
__builtin_memset (x, -1, sizeof (x));
for (i = 0; i < 100; i++)
{
x[i].b1 = false;
x[i].b2 = false;
x[i].b3 = false;
x[i].b4.f = false;
}
foo (x, 100);
return 0;
}
https://godbolt.org/z/KWb7c1n5h
Both SVE GCC and RVV GCC failed to vectorize it.
But Clang succeed on vectorization.
