[clang] [HLSL][Matrix] Load and store ConstantMatrixBoolTypes as i32 FixedVectorTypes (PR #175245)

[Deric C. via cfe-commits]

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@@ -180,6 +180,19 @@ llvm::Type *CodeGenTypes::convertTypeForLoadStore(QualType T,
     return llvm::IntegerType::get(getLLVMContext(),
                                   (unsigned)Context.getTypeSize(T));
 
+  if (T->isConstantMatrixBoolType()) {
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Icohedron wrote:

It should be noted that when `CodeGenTypes::convertTypeForLoadStore` is called where `T->isConstantMatrixBoolType()`, the `LLVMTy` passed in is of type `<N x i1>`.
Normally the `LLVMTy` is returned and therefore no ZExt occurs because the type of the value being stored is already a `<N x i1>`.
Therefore this change makes it so that if  `T->isConstantMatrixBoolType()`, then we return a `<N x i32>` instead to reuse the existing logic that ZExts boolean vectors `<N x i1>` to `<N x i32>`

https://github.com/llvm/llvm-project/pull/175245