[clang] [llvm] [DirectX] Validate registers are bound to root signature (PR #146785)

[via llvm-commits]

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@@ -95,6 +97,8 @@ class BindingInfo {
   LLVM_ABI std::optional<uint32_t>
   findAvailableBinding(dxil::ResourceClass RC, uint32_t Space, int32_t Size);
 
+  LLVM_ABI bool isBound(dxil::ResourceClass RC, uint32_t Space, BindingRange B);
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joaosaffran wrote:

No, `findAvailableBinding` will find the first register that a resource of given size can fit into. `IsBound` checks if a range is taken. 

https://github.com/llvm/llvm-project/pull/146785