[OpenMP] Check for at least one map clause on target data directive.

Summary:
Adds the following restriction in the OpenMP specifications.

OpenMP [2.10.1, Restrictions, p. 97]
At least one map clause must appear on the directive.

Reviewers: ABataev

Differential Revision: http://reviews.llvm.org/D16341

llvm-svn: 258425

5 files changed, 62 insertions, 49 deletions

diff --git a/clang/lib/Sema/SemaOpenMP.cpp b/clang/lib/Sema/SemaOpenMP.cpp
index 3273bd18e16..40c8c18a50d 100644
--- a/clang/lib/Sema/SemaOpenMP.cpp
+++ b/clang/lib/Sema/SemaOpenMP.cpp
@@ -5618,6 +5618,14 @@ StmtResult Sema::ActOnOpenMPTargetDataDirective(ArrayRef<OMPClause *> Clauses,
 
   assert(isa<CapturedStmt>(AStmt) && "Captured statement expected");
 
+  // OpenMP [2.10.1, Restrictions, p. 97]
+  // At least one map clause must appear on the directive.
+  if (!HasMapClause(Clauses)) {
+    Diag(StartLoc, diag::err_omp_no_map_for_directive) <<
+        getOpenMPDirectiveName(OMPD_target_data);
+    return StmtError();
+  }
+
   getCurFunction()->setHasBranchProtectedScope();
 
   return OMPTargetDataDirective::Create(Context, StartLoc, EndLoc, Clauses,
diff --git a/clang/test/OpenMP/target_data_ast_print.cpp b/clang/test/OpenMP/target_data_ast_print.cpp
index cdff857e569..ed7a9654119 100644
--- a/clang/test/OpenMP/target_data_ast_print.cpp
+++ b/clang/test/OpenMP/target_data_ast_print.cpp
@@ -12,13 +12,13 @@ template <typename T, int C>
 T tmain(T argc, T *argv) {
   T i, j, b, c, d, e, x[20];
 
-#pragma omp target data
+#pragma omp target data map(to: c)
   i = argc;
 
-#pragma omp target data if (target data: j > 0)
+#pragma omp target data map(to: c) if (target data: j > 0)
   foo();
 
-#pragma omp target data if (b)
+#pragma omp target data map(to: c) if (b)
   foo();
 
 #pragma omp target data map(c)
@@ -48,11 +48,11 @@ T tmain(T argc, T *argv) {
 
 // CHECK: template <typename T = int, int C = 5> int tmain(int argc, int *argv) {
 // CHECK-NEXT: int i, j, b, c, d, e, x[20];
-// CHECK-NEXT: #pragma omp target data
+// CHECK-NEXT: #pragma omp target data map(to: c)
 // CHECK-NEXT: i = argc;
-// CHECK-NEXT: #pragma omp target data if(target data: j > 0)
+// CHECK-NEXT: #pragma omp target data map(to: c) if(target data: j > 0)
 // CHECK-NEXT: foo();
-// CHECK-NEXT: #pragma omp target data if(b)
+// CHECK-NEXT: #pragma omp target data map(to: c) if(b)
 // CHECK-NEXT: foo();
 // CHECK-NEXT: #pragma omp target data map(tofrom: c)
 // CHECK-NEXT: foo();
@@ -70,11 +70,11 @@ T tmain(T argc, T *argv) {
 // CHECK-NEXT: foo();
 // CHECK: template <typename T = char, int C = 1> char tmain(char argc, char *argv) {
 // CHECK-NEXT: char i, j, b, c, d, e, x[20];
-// CHECK-NEXT: #pragma omp target data
+// CHECK-NEXT: #pragma omp target data map(to: c)
 // CHECK-NEXT: i = argc;
-// CHECK-NEXT: #pragma omp target data if(target data: j > 0)
+// CHECK-NEXT: #pragma omp target data map(to: c) if(target data: j > 0)
 // CHECK-NEXT: foo();
-// CHECK-NEXT: #pragma omp target data if(b)
+// CHECK-NEXT: #pragma omp target data map(to: c) if(b)
 // CHECK-NEXT: foo();
 // CHECK-NEXT: #pragma omp target data map(tofrom: c)
 // CHECK-NEXT: foo();
@@ -92,11 +92,11 @@ T tmain(T argc, T *argv) {
 // CHECK-NEXT: foo();
 // CHECK: template <typename T, int C> T tmain(T argc, T *argv) {
 // CHECK-NEXT: T i, j, b, c, d, e, x[20];
-// CHECK-NEXT: #pragma omp target data
+// CHECK-NEXT: #pragma omp target data map(to: c)
 // CHECK-NEXT: i = argc;
-// CHECK-NEXT: #pragma omp target data if(target data: j > 0)
+// CHECK-NEXT: #pragma omp target data map(to: c) if(target data: j > 0)
 // CHECK-NEXT: foo();
-// CHECK-NEXT: #pragma omp target data if(b)
+// CHECK-NEXT: #pragma omp target data map(to: c) if(b)
 // CHECK-NEXT: foo();
 // CHECK-NEXT: #pragma omp target data map(tofrom: c)
 // CHECK-NEXT: foo();
@@ -118,17 +118,17 @@ int main (int argc, char **argv) {
   static int a;
 // CHECK: static int a;
 
-#pragma omp target data
-// CHECK:      #pragma omp target data
+#pragma omp target data map(to: c)
+// CHECK:      #pragma omp target data map(to: c)
   a=2;
 // CHECK-NEXT: a = 2;
-#pragma omp target data if (target data: b)
-// CHECK: #pragma omp target data if(target data: b)
+#pragma omp target data map(to: c) if (target data: b)
+// CHECK: #pragma omp target data map(to: c) if(target data: b)
   foo();
 // CHECK-NEXT: foo();
 
-#pragma omp target data if (b > g)
-// CHECK: #pragma omp target data if(b > g)
+#pragma omp target data map(to: c) if (b > g)
+// CHECK: #pragma omp target data map(to: c) if(b > g)
   foo();
 // CHECK-NEXT: foo();
 
diff --git a/clang/test/OpenMP/target_data_device_messages.cpp b/clang/test/OpenMP/target_data_device_messages.cpp
index 9e8e31a28f5..a46afee0355 100644
--- a/clang/test/OpenMP/target_data_device_messages.cpp
+++ b/clang/test/OpenMP/target_data_device_messages.cpp
@@ -10,18 +10,19 @@ bool foobool(int argc) {
 struct S1; // expected-note {{declared here}}
 
 int main(int argc, char **argv) {
-  #pragma omp target data device // expected-error {{expected '(' after 'device'}}
-  #pragma omp target data device ( // expected-error {{expected expression}} expected-error {{expected ')'}} expected-note {{to match this '('}}
-  #pragma omp target data device () // expected-error {{expected expression}}
-  #pragma omp target data device (argc // expected-error {{expected ')'}} expected-note {{to match this '('}}
-  #pragma omp target data device (argc)) // expected-warning {{extra tokens at the end of '#pragma omp target data' are ignored}}
-#pragma omp target data device (argc > 0 ? argv[1] : argv[2]) // expected-error {{expression must have integral or unscoped enumeration type, not 'char *'}}
-  #pragma omp target data device (argc + argc)
-  #pragma omp target data device (argc), device (argc+1) // expected-error {{directive '#pragma omp target data' cannot contain more than one 'device' clause}}
-  #pragma omp target data device (S1) // expected-error {{'S1' does not refer to a value}}
-  #pragma omp target data device (-2) // expected-error {{argument to 'device' clause must be a non-negative integer value}}
-  #pragma omp target device (-10u)
-  #pragma omp target device (3.14) // expected-error {{expression must have integral or unscoped enumeration type, not 'double'}}
+  int a;
+  #pragma omp target data map(to: a) device // expected-error {{expected '(' after 'device'}}
+  #pragma omp target data map(to: a) device ( // expected-error {{expected expression}} expected-error {{expected ')'}} expected-note {{to match this '('}}
+  #pragma omp target data map(to: a) device () // expected-error {{expected expression}}
+  #pragma omp target data map(to: a) device (argc // expected-error {{expected ')'}} expected-note {{to match this '('}}
+  #pragma omp target data map(to: a) device (argc)) // expected-warning {{extra tokens at the end of '#pragma omp target data' are ignored}}
+#pragma omp target data map(to: a) device (argc > 0 ? argv[1] : argv[2]) // expected-error {{expression must have integral or unscoped enumeration type, not 'char *'}}
+  #pragma omp target data map(to: a) device (argc + argc)
+  #pragma omp target data map(to: a) device (argc), device (argc+1) // expected-error {{directive '#pragma omp target data' cannot contain more than one 'device' clause}}
+  #pragma omp target data map(to: a) device (S1) // expected-error {{'S1' does not refer to a value}}
+  #pragma omp target data map(to: a) device (-2) // expected-error {{argument to 'device' clause must be a non-negative integer value}}
+  #pragma omp target map(to: a) device (-10u)
+  #pragma omp target map(to: a) device (3.14) // expected-error {{expression must have integral or unscoped enumeration type, not 'double'}}
   foo();
 
   return 0;
diff --git a/clang/test/OpenMP/target_data_if_messages.cpp b/clang/test/OpenMP/target_data_if_messages.cpp
index 77edefa48b8..ec6fe269215 100644
--- a/clang/test/OpenMP/target_data_if_messages.cpp
+++ b/clang/test/OpenMP/target_data_if_messages.cpp
@@ -10,22 +10,23 @@ bool foobool(int argc) {
 struct S1; // expected-note {{declared here}}
 
 int main(int argc, char **argv) {
-  #pragma omp target data if // expected-error {{expected '(' after 'if'}}
-  #pragma omp target data if ( // expected-error {{expected expression}} expected-error {{expected ')'}} expected-note {{to match this '('}}
-  #pragma omp target data if () // expected-error {{expected expression}}
-  #pragma omp target data if (argc // expected-error {{expected ')'}} expected-note {{to match this '('}}
-  #pragma omp target data if (argc)) // expected-warning {{extra tokens at the end of '#pragma omp target data' are ignored}}
-  #pragma omp target data if (argc > 0 ? argv[1] : argv[2])
-  #pragma omp target data if (argc + argc)
-  #pragma omp target data if (foobool(argc)), if (true) // expected-error {{directive '#pragma omp target data' cannot contain more than one 'if' clause}}
-  #pragma omp target data if (S1) // expected-error {{'S1' does not refer to a value}}
-  #pragma omp target data if (argv[1]=2) // expected-error {{expected ')'}} expected-note {{to match this '('}}
-  #pragma omp target data if(target data : // expected-error {{expected expression}} expected-error {{expected ')'}} expected-note {{to match this '('}}
-  #pragma omp target data if(target data : argc // expected-error {{expected ')'}} expected-note {{to match this '('}}
-  #pragma omp target data if(target data : argc)
-  #pragma omp target data if(target data : argc) if (for:argc) // expected-error {{directive name modifier 'for' is not allowed for '#pragma omp target data'}}
-  #pragma omp target data if(target data : argc) if (target data:argc) // expected-error {{directive '#pragma omp target data' cannot contain more than one 'if' clause with 'target data' name modifier}}
-  #pragma omp target data if(target data : argc) if (argc) // expected-error {{no more 'if' clause is allowed}} expected-note {{previous clause with directive name modifier specified here}}
+  int a;
+  #pragma omp target data map(to: a) if // expected-error {{expected '(' after 'if'}}
+  #pragma omp target data map(to: a) if ( // expected-error {{expected expression}} expected-error {{expected ')'}} expected-note {{to match this '('}}
+  #pragma omp target data map(to: a) if () // expected-error {{expected expression}}
+  #pragma omp target data map(to: a) if (argc // expected-error {{expected ')'}} expected-note {{to match this '('}}
+  #pragma omp target data map(to: a) if (argc)) // expected-warning {{extra tokens at the end of '#pragma omp target data' are ignored}}
+  #pragma omp target data map(to: a) if (argc > 0 ? argv[1] : argv[2])
+  #pragma omp target data map(to: a) if (argc + argc)
+  #pragma omp target data map(to: a) if (foobool(argc)), if (true) // expected-error {{directive '#pragma omp target data' cannot contain more than one 'if' clause}}
+  #pragma omp target data map(to: a) if (S1) // expected-error {{'S1' does not refer to a value}}
+  #pragma omp target data map(to: a) if (argv[1]=2) // expected-error {{expected ')'}} expected-note {{to match this '('}}
+  #pragma omp target data map(to: a) if(target data : // expected-error {{expected expression}} expected-error {{expected ')'}} expected-note {{to match this '('}}
+  #pragma omp target data map(to: a) if(target data : argc // expected-error {{expected ')'}} expected-note {{to match this '('}}
+  #pragma omp target data map(to: a) if(target data : argc)
+  #pragma omp target data map(to: a) if(target data : argc) if (for:argc) // expected-error {{directive name modifier 'for' is not allowed for '#pragma omp target data'}}
+  #pragma omp target data map(to: a) if(target data : argc) if (target data:argc) // expected-error {{directive '#pragma omp target data' cannot contain more than one 'if' clause with 'target data' name modifier}}
+  #pragma omp target data map(to: a) if(target data : argc) if (argc) // expected-error {{no more 'if' clause is allowed}} expected-note {{previous clause with directive name modifier specified here}}
   foo();
 
   return 0;
diff --git a/clang/test/OpenMP/target_data_messages.c b/clang/test/OpenMP/target_data_messages.c
index cd60d85a903..153b4377290 100644
--- a/clang/test/OpenMP/target_data_messages.c
+++ b/clang/test/OpenMP/target_data_messages.c
@@ -3,19 +3,22 @@
 void foo() { }
 
 int main(int argc, char **argv) {
+  int a;
+  #pragma omp target data // expected-error {{expected at least one map clause for '#pragma omp target data'}}
+  {}
   L1:
     foo();
-  #pragma omp target data
+  #pragma omp target data map(a)
   {
     foo();
     goto L1; // expected-error {{use of undeclared label 'L1'}}
   }
   goto L2; // expected-error {{use of undeclared label 'L2'}}
-  #pragma omp target data
+  #pragma omp target data map(a)
   L2:
   foo();
 
-  #pragma omp target data(i) // expected-warning {{extra tokens at the end of '#pragma omp target data' are ignored}}
+  #pragma omp target data map(a)(i) // expected-warning {{extra tokens at the end of '#pragma omp target data' are ignored}}
   {
     foo();
   }