[clang] [HLSL][Sema] Validate that occupied register numbers never exceed UINT32_MAX (PR #174028)

[Tex Riddell via cfe-commits]

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@@ -2361,6 +2361,94 @@ static bool DiagnoseHLSLRegisterAttribute(Sema &S, SourceLocation &ArgLoc,
   return ValidateMultipleRegisterAnnotations(S, D, RegType);
 }
 
+// return false if the slot count exceeds the limit, true otherwise
+static bool AccumulateHLSLResourceSlots(QualType Ty, uint64_t &SlotCount,
+                                        const uint64_t &Limit, ASTContext &Ctx,
+                                        uint64_t Multiplier = 1) {
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tex3d wrote:

It seems to me that `SlotCount` is really like `StartSlot`, and `Multiplier` is really like `ArrayCount`.

https://github.com/llvm/llvm-project/pull/174028