[analyzer] Reapply r271907 (2nd try).

Second try at reapplying
"[analyzer] Add checker for correct usage of MPI API in C and C++."

Special thanks to Dan Liew for helping test the fix for the template
specialization compiler error with gcc.

The original patch is by Alexander Droste!

Differential Revision: http://reviews.llvm.org/D12761

llvm-svn: 271977

1 files changed, 47 insertions, 0 deletions

diff --git a/clang/test/Analysis/MemRegion.cpp b/clang/test/Analysis/MemRegion.cpp
new file mode 100644
index 00000000000..992b7f1f976
--- /dev/null
+++ b/clang/test/Analysis/MemRegion.cpp
@@ -0,0 +1,47 @@
+// RUN: %clang_cc1 -analyze -analyzer-checker=optin.mpi.MPI-Checker -verify %s
+
+#include "MPIMock.h"
+
+// Use MPI-Checker to test 'getDescriptiveName', as the checker uses the
+// function for diagnostics.
+void testGetDescriptiveName() {
+  int rank = 0;
+  MPI_Comm_rank(MPI_COMM_WORLD, &rank);
+  MPI_Request sendReq1;
+  MPI_Wait(&sendReq1, MPI_STATUS_IGNORE); // expected-warning{{Request 'sendReq1' has no matching nonblocking call.}}
+}
+
+void testGetDescriptiveName2() {
+  int rank = 0;
+  MPI_Comm_rank(MPI_COMM_WORLD, &rank);
+  MPI_Request sendReq1[10][10][10];
+  MPI_Wait(&sendReq1[1][7][9], MPI_STATUS_IGNORE); // expected-warning{{Request 'sendReq1[1][7][9]' has no matching nonblocking call.}}
+}
+
+void testGetDescriptiveName3() {
+  int rank = 0;
+  MPI_Comm_rank(MPI_COMM_WORLD, &rank);
+  typedef struct { MPI_Request req; } ReqStruct;
+  ReqStruct rs;
+  MPI_Request *r = &rs.req;
+  MPI_Wait(r, MPI_STATUS_IGNORE); // expected-warning{{Request 'rs.req' has no matching nonblocking call.}}
+}
+
+void testGetDescriptiveName4() {
+  int rank = 0;
+  MPI_Comm_rank(MPI_COMM_WORLD, &rank);
+  typedef struct { MPI_Request req[2][2]; } ReqStruct;
+  ReqStruct rs;
+  MPI_Request *r = &rs.req[0][1];
+  MPI_Wait(r, MPI_STATUS_IGNORE); // expected-warning{{Request 'rs.req[0][1]' has no matching nonblocking call.}}
+}
+
+void testGetDescriptiveName5() {
+  int rank = 0;
+  MPI_Comm_rank(MPI_COMM_WORLD, &rank);
+  typedef struct { MPI_Request req; } ReqStructInner;
+  typedef struct  { ReqStructInner req; } ReqStruct;
+  ReqStruct rs;
+  MPI_Request *r = &rs.req.req;
+  MPI_Wait(r, MPI_STATUS_IGNORE); // expected-warning{{Request 'rs.req.req' has no matching nonblocking call.}}
+}