text: // RUN: %clang_cc1 -analyze -analyzer-checker=optin.mpi.MPI-Checker -analyzer-output=text -verify %s
  
  // MPI-Checker test file to test note diagnostics.
  
  #include "MPIMock.h"
  
  void doubleNonblocking() {
    double buf = 0;
    MPI_Request sendReq;
    MPI_Isend(&buf, 1, MPI_DOUBLE, 0, 0, MPI_COMM_WORLD, &sendReq); // expected-note{{Request is previously used by nonblocking call here.}}
    MPI_Irecv(&buf, 1, MPI_DOUBLE, 0, 0, MPI_COMM_WORLD, &sendReq); // expected-warning{{Double nonblocking on request 'sendReq'.}} expected-note{{Double nonblocking on request 'sendReq'.}}
    MPI_Wait(&sendReq, MPI_STATUS_IGNORE);
  }
  
  void missingWait() {
    double buf = 0;
    MPI_Request sendReq;
    MPI_Ireduce(MPI_IN_PLACE, &buf, 1, MPI_DOUBLE, MPI_SUM, 0, MPI_COMM_WORLD, &sendReq); // expected-note{{Request is previously used by nonblocking call here.}}
  } // expected-warning{{Request 'sendReq' has no matching wait.}} expected-note{{Request 'sendReq' has no matching wait.}}
  
  // If more than 2 nonblocking calls are using a request in a sequence, they all
  // point to the first call as the 'previous' call. This is because the
  // BugReporterVisitor only checks for differences in state or existence of an
  // entity.
  void tripleNonblocking() {
    double buf = 0;
    MPI_Request sendReq;
    MPI_Isend(&buf, 1, MPI_DOUBLE, 0, 0, MPI_COMM_WORLD, &sendReq); // expected-note 2{{Request is previously used by nonblocking call here.}}
    MPI_Irecv(&buf, 1, MPI_DOUBLE, 0, 0, MPI_COMM_WORLD, &sendReq); // expected-warning{{Double nonblocking on request 'sendReq'.}} expected-note{{Double nonblocking on request 'sendReq'.}}
  
    MPI_Isend(&buf, 1, MPI_DOUBLE, 0, 0, MPI_COMM_WORLD, &sendReq); // expected-warning{{Double nonblocking on request 'sendReq'.}} expected-note{{Double nonblocking on request 'sendReq'.}}
  
    MPI_Wait(&sendReq, MPI_STATUS_IGNORE);
  }
  