https://github.com/llvm-beanz requested changes to this pull request.
I think this approach probably needs some adjustment. HLSL allows
constructor-like syntax but it behaves the same way the HLSL initializer list
syntax does, so matrix initialization should be done through SemaHLSL’s
initialization list handling.
Here’s an example of an odd case that really makes this special:
```
struct F {
float f[16];
};
export void fn() {
F f;
float4x4 M = float4x4(f);
}
```
https://godbolt.org/z/z9GoGvnrK
The language spec that describes aggregate initialization is available
[here](https://microsoft.github.io/hlsl-specs/specs/hlsl.html#Decl.Init.Agg).
https://github.com/llvm/llvm-project/pull/160960
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