[llvm-branch-commits] [flang] [flang][openmp] Add parser/semantic support for workdistribute (PR #154377)

[Krzysztof Parzyszek via llvm-branch-commits]

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@@ -141,6 +141,67 @@ class OmpWorkshareBlockChecker {
   parser::CharBlock source_;
 };
 
+// 'OmpWorkdistributeBlockChecker' is used to check the validity of the
+// assignment statements and the expressions enclosed in an OpenMP
+// workdistribute construct
+class OmpWorkdistributeBlockChecker {
+public:
+  OmpWorkdistributeBlockChecker(
+      SemanticsContext &context, parser::CharBlock source)
+      : context_{context}, source_{source} {}
+
+  template <typename T> bool Pre(const T &) { return true; }
+  template <typename T> void Post(const T &) {}
+
+  bool Pre(const parser::AssignmentStmt &assignment) {
+    const auto &var{std::get<parser::Variable>(assignment.t)};
+    const auto &expr{std::get<parser::Expr>(assignment.t)};
+    const auto *lhs{GetExpr(context_, var)};
+    const auto *rhs{GetExpr(context_, expr)};
+    if (lhs && rhs) {
+      Tristate isDefined{semantics::IsDefinedAssignment(
+          lhs->GetType(), lhs->Rank(), rhs->GetType(), rhs->Rank())};
+      if (isDefined == Tristate::Yes) {
+        context_.Say(expr.source,
+            "Defined assignment statement is not "
+            "allowed in a WORKDISTRIBUTE construct"_err_en_US);
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kparzysz wrote:

Please concatenate the parts of error messages.  This makes it easier to grep sources for a message.

https://github.com/llvm/llvm-project/pull/154377