[clang] [HLSL][Matrix] Update indexed matrix elements individually (PR #176216)

[Deric C. via cfe-commits]

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@@ -2736,29 +2758,33 @@ void CodeGenFunction::EmitStoreThroughLValue(RValue Src, LValue Dst,
       return;
     }
     if (Dst.isMatrixRow()) {
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Icohedron wrote:

I've created an issue for it under #176468

https://github.com/llvm/llvm-project/pull/176216