[Bug target/125245] [17 Regression] ICE at -O1 during RTL pass: x86_cse

[xxs_chy at outlook dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=125245

--- Comment #4 from XChy <xxs_chy at outlook dot com> ---
It seems that the fix only prevents the reduced case from crashing.

gcc version 17.0.0 20260510 (experimental) (GCC)

This case also crashed GCC at -O3:
#include <stdint.h>
typedef int16_t v2i16 __attribute__((vector_size(4)));
int16_t g5;
_Bool g26;
void f15(v2i16, int16_t, void *);
void f3()
{
    int16_t v1;
    v2i16 vec6;
lbl_br7:
    vec6[0] = 1;
    v1 = vec6[0];
lbl_br10:
    g5 = vec6[0];
    vec6[1] = g5;
    if (g26)
    {
        f15(vec6, 0, 0);
        goto lbl_br7;
    }
    vec6[1] = v1;
    g26 = g5 = vec6[1];
    vec6[0] = g5;
    goto lbl_br10;
}