[clang] [Clang][OpenMP] Emit unsupported directive error (PR #70233)

[Raymond Chang via cfe-commits]

https://github.com/rkchang updated https://github.com/llvm/llvm-project/pull/70233

>From 72c056b825963d0de1dcf3fe3a6de922098d0ad9 Mon Sep 17 00:00:00 2001
From: Raymond Chang <raymondkenchang at gmail.com>
Date: Thu, 12 Oct 2023 01:51:03 -0400
Subject: [PATCH 1/2] Emit unsupported directive error

---
 clang/lib/CodeGen/CGStmt.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/clang/lib/CodeGen/CGStmt.cpp b/clang/lib/CodeGen/CGStmt.cpp
index c719df1bfa05036..4eeaf9645a3eab8 100644
--- a/clang/lib/CodeGen/CGStmt.cpp
+++ b/clang/lib/CodeGen/CGStmt.cpp
@@ -407,7 +407,7 @@ void CodeGenFunction::EmitStmt(const Stmt *S, ArrayRef<const Attr *> Attrs) {
     EmitOMPInteropDirective(cast<OMPInteropDirective>(*S));
     break;
   case Stmt::OMPDispatchDirectiveClass:
-    llvm_unreachable("Dispatch directive not supported yet.");
+    CGM.ErrorUnsupported(S, "OpenMP dispatch directive");
     break;
   case Stmt::OMPScopeDirectiveClass:
     llvm_unreachable("scope not supported with FE outlining");

>From 65d61090cf6f66a8b6a236e24a775806b5339df9 Mon Sep 17 00:00:00 2001
From: Raymond Chang <raymondkenchang at gmail.com>
Date: Wed, 22 Nov 2023 01:03:31 -0500
Subject: [PATCH 2/2] Add test case

---
 clang/test/OpenMP/dispatch_unsupported.c | 7 +++++++
 1 file changed, 7 insertions(+)
 create mode 100644 clang/test/OpenMP/dispatch_unsupported.c

diff --git a/clang/test/OpenMP/dispatch_unsupported.c b/clang/test/OpenMP/dispatch_unsupported.c
new file mode 100644
index 000000000000000..ff0815dda6a3fd9
--- /dev/null
+++ b/clang/test/OpenMP/dispatch_unsupported.c
@@ -0,0 +1,7 @@
+// RUN: %clang_cc1 -emit-llvm -fopenmp -disable-llvm-passes %s -verify=expected
+
+// expected-error at +2 {{cannot compile this OpenMP dispatch directive yet}} 
+void a(){
+    #pragma omp dispatch
+    a();
+}
\ No newline at end of file