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

[Finn Plummer via cfe-commits]

================
@@ -316,6 +316,32 @@ findOverlappingRanges(llvm::SmallVector<RangeInfo> &Infos) {
   return Overlaps;
 }
 
+llvm::SmallVector<RangeInfo>
+findUnboundRanges(const llvm::SmallVectorImpl<RangeInfo> &Ranges,
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inbelic wrote:

```suggestion
findUnboundRanges(ArrayRef<RangeInfo> &Ranges,
```

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