[OPENMP]Add support for analysis of firstprivate variables.

Summary:
Firstprivate variables are the variables, for which the private copies
must be created in the OpenMP regions and must be initialized with the
original values. Thus, we must report if the uninitialized variable is
used as firstprivate.

Reviewers: NoQ

Subscribers: guansong, jdoerfert, caomhin, kkwli0, cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D64765

llvm-svn: 366689

1 files changed, 8 insertions, 0 deletions

diff --git a/clang/test/OpenMP/distribute_parallel_for_firstprivate_messages.cpp b/clang/test/OpenMP/distribute_parallel_for_firstprivate_messages.cpp
index d283c29c328..3206c1c71a0 100644
--- a/clang/test/OpenMP/distribute_parallel_for_firstprivate_messages.cpp
+++ b/clang/test/OpenMP/distribute_parallel_for_firstprivate_messages.cpp
@@ -8,6 +8,14 @@ void foo() {
 bool foobool(int argc) {
   return argc;
 }
+
+void xxx(int argc) {
+  int fp; // expected-note {{initialize the variable 'fp' to silence this warning}}
+#pragma omp distribute parallel for firstprivate(fp) // expected-warning {{variable 'fp' is uninitialized when used here}}
+  for (int i = 0; i < 10; ++i)
+    ;
+}
+
 extern int omp_default_mem_alloc;
 
 struct S1; // expected-note 2 {{declared here}} expected-note 2 {{forward declaration of 'S1'}}