[HLSL][Matrix] Load and store ConstantMatrixBoolTypes as i32 FixedVectorTypes (#175245) Fixes #175236 This pull request improves support for HLSL constant matrix types with boolean elements in Clang's code generation. The main changes ensure that boolean (i1) matrices are correctly represented and stored as i32 vectors in LLVM IR. This includes updates to both the code generation logic and related tests. ### Code generation improvements for HLSL boolean matrices * Updated `convertTypeForLoadStore` in `CodeGenTypes.cpp` to represent constant matrix types with boolean elements as `FixedVectorType` of integers, ensuring atomic load/store operations and correct element type conversion for HLSL. * Modified `EmitToMemory` in `CGExpr.cpp` to handle both `ExtVectorBoolType` and `ConstantMatrixBoolType`, improving the handling of boolean matrices during memory emission. ### Test updates for boolean matrix codegen * Adjusted test expectations in `BoolMatrix.hlsl` to reflect the new representation, showing stores and loads of `<N x i32>` instead of `<N x i1>` for boolean matrices, and added zero-extension where necessary. * Added a new test for a 4x4 boolean matrix function to verify correct code generation for initial stores to boolean matrix parameter declaration allocas.
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