[SPIR-V] compiler crash when casting types

[hannes-vernooij]

Casting types with an identical size causes a segmentation fault.
https://shader-playground.timjones.io/03295c7334e11b732d4218543ebf47a4

struct A {
    uint data;
};

struct B {
    uint internalData0;
    uint internalData1;
    uint internalData2;
    uint internalData3;
};

struct C {
    A internalPackedAlbedo;
    uint internalData1;
    uint internalData2;
    uint internalData3;
};

[numthreads(8, 8, 1)] void main() {
    C diffuseLobe = (C)0;
    B lobe = (B)diffuseLobe;
}

It does compile successfully when A in struct C was defined as an uint instead of A.

[hannes-vernooij]

It does compile when casting the other way around, B(diffuseLobe) instead of (B)diffuseLobe:

struct A {
    uint data;
};

struct B {
    uint internalData0;
    uint internalData1;
    uint internalData2;
    uint internalData3;
};

struct C {
    A internalPackedAlbedo;
    uint internalData1;
    uint internalData2;
    uint internalData3;
};

[numthreads(8, 8, 1)] void main() {
    C diffuseLobe = (C)0;
    B lobe = B(diffuseLobe);
}

[pow2clk]

In spite of the fact that shader playground still has a compiler that reproduces this, I find this no longer repros with spirv or dxil generation on my own builds and the most recent godbolt compilers:

https://godbolt.org/z/PG3cfsE8T

Please re-open if you find a repro in the latest compiler