[clang] [llvm] [HLSL] Add `Increment`/`DecrementCounter` methods to structured buffers (PR #114148)

[Greg Roth via cfe-commits]

================
@@ -271,53 +246,70 @@ struct BuiltinTypeDeclBuilder {
     return *this;
   }
 
+  FieldDecl *getResourceHandleField() {
+    FieldDecl *FD = Fields["h"];
+    assert(FD && FD->getType()->isHLSLAttributedResourceType() &&
+           "record does not have resource handle");
+    return FD;
+  }
+
+  QualType getFirstTemplateTypeParam() {
+    assert(Template && "record it not a template");
+    if (const auto *TTD = dyn_cast<TemplateTypeParmDecl>(
+            Template->getTemplateParameters()->getParam(0))) {
+      return QualType(TTD->getTypeForDecl(), 0);
+    }
+    return QualType();
+  }
+
   BuiltinTypeDeclBuilder &startDefinition() {
-    if (Record->isCompleteDefinition())
-      return *this;
+    // we might already have complete definition from a precompiled header
+    assert(!Record->isCompleteDefinition() && "record is already complete");
     Record->startDefinition();
     return *this;
   }
 
   BuiltinTypeDeclBuilder &completeDefinition() {
-    if (Record->isCompleteDefinition())
-      return *this;
+    assert(!Record->isCompleteDefinition() && "record is already complete");
     assert(Record->isBeingDefined() &&
            "Definition must be started before completing it.");
 
     Record->completeDefinition();
     return *this;
   }
 
-  TemplateParameterListBuilder addTemplateArgumentList(Sema &S);
-  BuiltinTypeDeclBuilder &addSimpleTemplateParams(Sema &S,
-                                                  ArrayRef<StringRef> Names);
+  TemplateParameterListBuilder addTemplateArgumentList();
+  BuiltinTypeDeclBuilder &addSimpleTemplateParams(ArrayRef<StringRef> Names);
+
+  // Builtin types methods
+  BuiltinTypeDeclBuilder &addIncrementCounterMethod();
+  BuiltinTypeDeclBuilder &addDecrementCounterMethod();
 };
 
 struct TemplateParameterListBuilder {
   BuiltinTypeDeclBuilder &Builder;
-  Sema &S;
   llvm::SmallVector<NamedDecl *> Params;
 
-  TemplateParameterListBuilder(Sema &S, BuiltinTypeDeclBuilder &RB)
-      : Builder(RB), S(S) {}
+  TemplateParameterListBuilder(BuiltinTypeDeclBuilder &RB) : Builder(RB) {}
 
   ~TemplateParameterListBuilder() { finalizeTemplateArgs(); }
 
   TemplateParameterListBuilder &
   addTypeParameter(StringRef Name, QualType DefaultValue = QualType()) {
-    if (Builder.Record->isCompleteDefinition())
-      return *this;
+    assert(!Builder.Record->isCompleteDefinition() &&
+           "record is already complete");
----------------
pow2clk wrote:

I approve of altering the expectations the callers of this function should 
have. I think the previous behavior was less a convenience than an unpleasant 
surprise.

https://github.com/llvm/llvm-project/pull/114148
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