From: Joel E. Denny <jdenny.ornl@gmail.com>
Date: Thu, 28 Jun 2018 19:46:10 +0000 (+0000)
Subject: [OPENMP] Fix incomplete type check for array reductions
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=5026a3c6f0d8ff9d16e1809928264300d9569fb7;p=clang

[OPENMP] Fix incomplete type check for array reductions

A reduction for an incomplete array type used to produce an assert
fail during codegen.  Now it produces a diagnostic.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@335907 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Sema/SemaOpenMP.cpp b/lib/Sema/SemaOpenMP.cpp
index 7da9df90ac..6fb0125e6e 100644
--- a/lib/Sema/SemaOpenMP.cpp
+++ b/lib/Sema/SemaOpenMP.cpp
@@ -10335,7 +10335,7 @@ static bool actOnOMPReductionKindClause(
     // OpenMP [2.9.3.3, Restrictions, C/C++, p.3]
     //  A variable that appears in a private clause must not have an incomplete
     //  type or a reference type.
-    if (S.RequireCompleteType(ELoc, Type,
+    if (S.RequireCompleteType(ELoc, D->getType(),
                               diag::err_omp_reduction_incomplete_type))
       continue;
     // OpenMP [2.14.3.6, reduction clause, Restrictions]
diff --git a/test/OpenMP/parallel_reduction_messages.c b/test/OpenMP/parallel_reduction_messages.c
new file mode 100644
index 0000000000..f88f8e0564
--- /dev/null
+++ b/test/OpenMP/parallel_reduction_messages.c
@@ -0,0 +1,11 @@
+// RUN: %clang_cc1 -verify -fopenmp -ferror-limit 150 -o - %s
+
+int incomplete[];
+
+void test() {
+#pragma omp parallel reduction(+ : incomplete) // expected-error {{a reduction list item with incomplete type 'int []'}}
+  ;
+}
+
+// complete to suppress an additional warning, but it's too late for pragmas
+int incomplete[3];