Lowering constants is currently not really compatible with unions. In this commit, constant lowering is drastically overhauled: instead of playing nice and generating SPIR-V constant representations for everything directly, we're just going to treat globals as an untyped bag of bytes ( or rather, SPIR-V 32-bit words), which we cast to the desired type at usage. This is similar to how Rust generates constants in its LLVm backend.
A general-purpose programming language and toolchain for maintaining robust, optimal, and reusable software.
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