https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111492
Bug ID: 111492
Summary: RISC-V: Dynamic LMUL picking incorrect LMUL
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 A
{
unsigned int a;
unsigned char c1, c2;
bool b1 : 1;
bool b2 : 1;
bool b3 : 1;
};
void
foo (const struct A *x, int y)
{
int s = 0, i;
for (i = 0; i < y; ++i)
{
const struct A a = x[i];
s += a.b1 ? 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;
}
foo (x, 100);
return 0;
}
--param=riscv-autovec-lmul=dynamic.
Pick LMUL = 8 incorrectly which cause horrible register spillings.
