llvm-beanz wrote:
> Could you explain more about can't put any vectors or matrices into the
> cbuffer structure type?
Consider this example (regardless of packoffset):
```hlsl
cbuffer {
float F;
float2 V;
}
```
The layout for this is basically:
```c
struct {
float F;
float Vx; // v.x
float Vy; // v.y
};
```
These elements are all packed.
If you translate this to an IR struct you get something like:
```llvm
type { float, <2 x float>}
```
The data layout will insert 4-bytes of padding between the float and the vector
because the vector needs to be properly aligned.
https://github.com/llvm/llvm-project/pull/91999
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