Passing `int4` constants to `dst` causes ICE

[pema99]

Description
Passing dst 2 int4 arguments causes a stack overflow.

Steps to Reproduce
Shader:

[shader("pixel")]
void PSMain() {
    int4 r = dst(int4(1, 2, 3, 4), int4(5, 6, 7, 8));
    if (r.x != 1) discard;
}

Command: dxc.exe -T ps_6_6 -E PSMain dst_int4.hlsl

Actual Behavior

Internal compiler error: stack overflow

Environment

• dxcompiler.dll: 1.9(5184-21d28f72)(1.9.2602.17) - 1.9.2602.17 (21d28f727)
• Windows 10