[llvm-branch-commits] [clang] [HLSL] Implement default constant buffer `$Globals` (PR #125807)

[Helena Kotas via llvm-branch-commits]

================
@@ -5753,6 +5765,30 @@ void HLSLBufferDecl::addLayoutStruct(CXXRecordDecl *LS) {
   addDecl(LS);
 }
 
+void HLSLBufferDecl::addDefaultBufferDecl(Decl *D) {
+  assert(isImplicit() &&
+         "default decls can only be added to the implicit/default constant "
+         "buffer $Globals");
+  DefaultBufferDecls.push_back(D);
+}
+
+HLSLBufferDecl::buffer_decl_iterator
+HLSLBufferDecl::buffer_decls_begin() const {
+  return buffer_decl_iterator(llvm::iterator_range(DefaultBufferDecls.begin(),
+                                                   DefaultBufferDecls.end()),
+                              decl_range(decls_begin(), decls_end()));
+}
+
+HLSLBufferDecl::buffer_decl_iterator HLSLBufferDecl::buffer_decls_end() const {
+  return buffer_decl_iterator(
+      llvm::iterator_range(DefaultBufferDecls.end(), DefaultBufferDecls.end()),
----------------
hekota wrote:

Yes, it signifies the end of the list. `buffer_decl_iterator` is a 
`llvm::concat_iterator` and it takes a range.

https://github.com/llvm/llvm-project/pull/125807
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