[OPENMP] Allow multiple mappings for member expressions for pointers.

If several member expressions are mapped and they reference the same
address as a base, but access different members, this must be allowed.

llvm-svn: 326212

4 files changed, 33 insertions, 11 deletions

diff --git a/clang/include/clang/Basic/DiagnosticSemaKinds.td b/clang/include/clang/Basic/DiagnosticSemaKinds.td
index 04e3d46..4fd75b0 100644
--- a/clang/include/clang/Basic/DiagnosticSemaKinds.td
+++ b/clang/include/clang/Basic/DiagnosticSemaKinds.td
@@ -8646,8 +8646,8 @@ def err_omp_pointer_mapped_along_with_derived_section : Error<
   "pointer cannot be mapped along with a section derived from itself">;
 def err_omp_original_storage_is_shared_and_does_not_contain : Error<
   "original storage of expression in data environment is shared but data environment do not fully contain mapped expression storage">;
-def err_omp_same_pointer_derreferenced : Error<
-  "same pointer derreferenced in multiple different ways in map clause expressions">;
+def err_omp_same_pointer_dereferenced : Error<
+  "same pointer dereferenced in multiple different ways in map clause expressions">;
 def note_omp_task_predetermined_firstprivate_here : Note<
   "predetermined as a firstprivate in a task construct here">;
 def err_omp_threadprivate_incomplete_type : Error<
diff --git a/clang/lib/Sema/SemaOpenMP.cpp b/clang/lib/Sema/SemaOpenMP.cpp
index 88c993d..7421da4 100644
--- a/clang/lib/Sema/SemaOpenMP.cpp
+++ b/clang/lib/Sema/SemaOpenMP.cpp
@@ -11987,14 +11987,20 @@ static bool CheckMapConflicts(
                 DerivedLoc,
                 diag::err_omp_pointer_mapped_along_with_derived_section)
                 << DerivedLoc;
-          } else {
+            SemaRef.Diag(RE->getExprLoc(), diag::note_used_here)
+                << RE->getSourceRange();
+            return true;
+          } else if (CI->getAssociatedExpression()->getStmtClass() !=
+                         SI->getAssociatedExpression()->getStmtClass() ||
+                     CI->getAssociatedDeclaration()->getCanonicalDecl() ==
+                         SI->getAssociatedDeclaration()->getCanonicalDecl()) {
             assert(CI != CE && SI != SE);
-            SemaRef.Diag(DerivedLoc, diag::err_omp_same_pointer_derreferenced)
+            SemaRef.Diag(DerivedLoc, diag::err_omp_same_pointer_dereferenced)
                 << DerivedLoc;
+            SemaRef.Diag(RE->getExprLoc(), diag::note_used_here)
+                << RE->getSourceRange();
+            return true;
           }
-          SemaRef.Diag(RE->getExprLoc(), diag::note_used_here)
-              << RE->getSourceRange();
-          return true;
         }
 
         // OpenMP 4.5 [2.15.5.1, map Clause, Restrictions, p.4]
diff --git a/clang/test/OpenMP/target_map_messages.cpp b/clang/test/OpenMP/target_map_messages.cpp
index 72bd35e..ce14b85 100644
--- a/clang/test/OpenMP/target_map_messages.cpp
+++ b/clang/test/OpenMP/target_map_messages.cpp
@@ -235,9 +235,17 @@ void SAclient(int arg) {
   {}
   #pragma omp target map(r.ArrS[0].A, t.ArrS[1].A)
   {}
-  #pragma omp target map(r.PtrS[0], r.PtrS->B) // expected-error {{same pointer derreferenced in multiple different ways in map clause expressions}} expected-note {{used here}}
+  #pragma omp target map(r.PtrS[0], r.PtrS->B) // expected-error {{same pointer dereferenced in multiple different ways in map clause expressions}} expected-note {{used here}}
   {}
-  #pragma omp target map(r.RPtrS[0], r.RPtrS->B) // expected-error {{same pointer derreferenced in multiple different ways in map clause expressions}} expected-note {{used here}}
+  #pragma omp target map(r.PtrS, r.PtrS->B) // expected-error {{pointer cannot be mapped along with a section derived from itself}} expected-note {{used here}}
+  {}
+  #pragma omp target map(r.PtrS->A, r.PtrS->B)
+  {}
+  #pragma omp target map(r.RPtrS[0], r.RPtrS->B) // expected-error {{same pointer dereferenced in multiple different ways in map clause expressions}} expected-note {{used here}}
+  {}
+  #pragma omp target map(r.RPtrS, r.RPtrS->B) // expected-error {{pointer cannot be mapped along with a section derived from itself}} expected-note {{used here}}
+  {}
+  #pragma omp target map(r.RPtrS->A, r.RPtrS->B)
   {}
   #pragma omp target map(r.S.Arr[:12])
   {}
diff --git a/clang/test/OpenMP/target_teams_map_messages.cpp b/clang/test/OpenMP/target_teams_map_messages.cpp
index 0fa7a9ec..896682a 100644
--- a/clang/test/OpenMP/target_teams_map_messages.cpp
+++ b/clang/test/OpenMP/target_teams_map_messages.cpp
@@ -225,9 +225,17 @@ void SAclient(int arg) {
   {}
   #pragma omp target teams map(r.ArrS[0].A, t.ArrS[1].A)
   {}
-  #pragma omp target teams map(r.PtrS[0], r.PtrS->B) // expected-error {{same pointer derreferenced in multiple different ways in map clause expressions}} expected-note {{used here}}
+  #pragma omp target teams map(r.PtrS[0], r.PtrS->B) // expected-error {{same pointer dereferenced in multiple different ways in map clause expressions}} expected-note {{used here}}
   {}
-  #pragma omp target teams map(r.RPtrS[0], r.RPtrS->B) // expected-error {{same pointer derreferenced in multiple different ways in map clause expressions}} expected-note {{used here}}
+  #pragma omp target teams map(r.PtrS, r.PtrS->B) // expected-error {{pointer cannot be mapped along with a section derived from itself}} expected-note {{used here}}
+  {}
+  #pragma omp target teams map(r.PtrS->A, r.PtrS->B)
+  {}
+  #pragma omp target teams map(r.RPtrS[0], r.RPtrS->B) // expected-error {{same pointer dereferenced in multiple different ways in map clause expressions}} expected-note {{used here}}
+  {}
+  #pragma omp target teams map(r.RPtrS, r.RPtrS->B) // expected-error {{pointer cannot be mapped along with a section derived from itself}} expected-note {{used here}}
+  {}
+  #pragma omp target teams map(r.RPtrS->A, r.RPtrS->B)
   {}
   #pragma omp target teams map(r.S.Arr[:12])
   {}