a77d807781
Adds code to expand the `llvm.spv.resource.handlefrombinding` and `llvm.spv.resource.getpointer` when the resource type is `spirv.VulkanBuffer`. It gets expanded as a storage buffer or uniform buffer denpending on the storage class used. This is implementing part of https://github.com/llvm/wg-hlsl/blob/main/proposals/0018-spirv-resource-representation.md.