[clang] [llvm] [HLSL] Add load overload with status (PR #166449)

[Helena Kotas via llvm-commits]

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@@ -100,6 +100,28 @@ static bool checkWaveOps(Intrinsic::ID IID) {
   }
 }
 
+// Checks to see if the status bit from a load with status
+// instruction is ever extracted.
+// This is our proof that the module requires TiledResources
+// to be set, as if check access fully mapped was used.
+bool checkIfStatusIsExtracted(const IntrinsicInst &II) {
+  [[maybe_unused]] Intrinsic::ID IID = II.getIntrinsicID();
+  assert(IID == Intrinsic::dx_resource_load_typedbuffer ||
+         IID == Intrinsic::dx_resource_load_rawbuffer &&
+             "unexpected intrinsic ID, only dx_resource_load_typedbuffer and "
+             "dx_resource_load_rawbuffer are expected");
+  for (const User *U : II.users()) {
+    if (const ExtractValueInst *EVI = dyn_cast<ExtractValueInst>(U)) {
+      // Resource load operations return a {result, status} pair
+      // check if we extract the status
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hekota wrote:

```suggestion
      // Resource load operations return a {result, status} pair.
      // Check if we extract the status.
```

https://github.com/llvm/llvm-project/pull/166449