[OpenMP 5.0] Parsing/sema support for map clause with mapper modifier.

This patch implements the parsing and sema support for OpenMP map
clauses with potential user-defined mapper attached. User defined mapper
is a new feature in OpenMP 5.0. A map clause can have an explicit or
implicit associated mapper, which instructs the compiler to generate
extra data mapping. An example is shown below:

    struct S { int len; int *d; };
    #pragma omp declare mapper(id: struct S s) map(s, s.d[0:s.len])
    struct S ss;
    #pragma omp target map(mapper(id) tofrom: ss) // use the mapper with name 'id' to map ss

Contributed-by: Lingda Li <lildmh@gmail.com>

Differential Revision: https://reviews.llvm.org/D58074

llvm-svn: 354347

1 files changed, 15 insertions, 0 deletions

diff --git a/clang/test/OpenMP/declare_mapper_messages.c b/clang/test/OpenMP/declare_mapper_messages.c
index c8e65b2a365..fc8fa9dbda5 100644
--- a/clang/test/OpenMP/declare_mapper_messages.c
+++ b/clang/test/OpenMP/declare_mapper_messages.c
@@ -35,6 +35,21 @@ int fun(int arg) {
 #pragma omp declare mapper(id: struct vec v) map(v.len)                 // expected-error {{redefinition of user-defined mapper for type 'struct vec' with name 'id'}}
     {
 #pragma omp declare mapper(id: struct vec v) map(v.len)
+      struct vec vv, v1;
+#pragma omp target map(mapper)                                          // expected-error {{use of undeclared identifier 'mapper'}}
+      {}
+#pragma omp target map(mapper:vv)                                       // expected-error {{expected '(' after 'mapper'}}
+      {}
+#pragma omp target map(mapper( :vv)                                     // expected-error {{expected expression}} expected-error {{expected ')'}} expected-warning {{implicit declaration of function 'mapper' is invalid in C99}} expected-note {{to match this '('}}
+      {}
+#pragma omp target map(mapper(aa :vv)                                   // expected-error {{use of undeclared identifier 'aa'}} expected-error {{expected ')'}} expected-warning {{implicit declaration of function 'mapper' is invalid in C99}} expected-note {{to match this '('}}
+      {}
+#pragma omp target map(mapper(ab) :vv)                                  // expected-error {{missing map type}} expected-error {{cannot find a valid user-defined mapper for type 'struct vec' with name 'ab'}}
+      {}
+#pragma omp target map(mapper(aa) :vv)                                  // expected-error {{missing map type}}
+      {}
+#pragma omp target map(mapper(aa) to:vv) map(close mapper(aa) from:v1)
+      {}
     }
   }
   return arg;