[PATCH] D83398: [OPENMP50]Perform data mapping analysis only for explicitly mapped data.

[Alexey Bataev via Phabricator via cfe-commits]

ABataev created this revision.
ABataev added a reviewer: jdoerfert.
Herald added subscribers: sstefan1, guansong, yaxunl.
Herald added a project: clang.

According to OpenMP 5.0, the restrictions for mapping of overlapped data
apply only for explicitly mapped data, there is no restriction for
implicitly mapped data just like in OpenMP 4.5.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D83398

Files:
  clang/lib/Sema/SemaOpenMP.cpp
  clang/test/OpenMP/target_map_messages.cpp


Index: clang/test/OpenMP/target_map_messages.cpp
===================================================================
--- clang/test/OpenMP/target_map_messages.cpp
+++ clang/test/OpenMP/target_map_messages.cpp
@@ -598,6 +598,7 @@
   const int (&l)[5] = da;
   SC1 s;
   SC1 *p;
+  int Arr[10];
 #pragma omp target data map // expected-error {{expected '(' after 'map'}} le45-error {{expected at least one 'map' or 'use_device_ptr' clause for '#pragma omp target data'}} le50-error {{expected at least one 'map', 'use_device_ptr', or 'use_device_addr' clause for '#pragma omp target data'}}
 #pragma omp target data map( // expected-error {{expected ')'}} expected-note {{to match this '('}} expected-error {{expected expression}}
 #pragma omp target data map() // expected-error {{expected expression}}
@@ -737,6 +738,12 @@
 #pragma omp target map(release: a) // expected-error {{map type 'release' is not allowed for '#pragma omp target'}}
   {}
 
+#pragma omp target data map(Arr[0:4]) // le45-note {{used here}}
+  {
+#pragma omp target
+    Arr[0] = 2; // le45-error {{original storage of expression in data environment is shared but data environment do not fully contain mapped expression storage}}
+  }
+
   return tmain<int, 3>(argc)+tmain<from, 4>(argc); // expected-note {{in instantiation of function template specialization 'tmain<int, 3>' requested here}} expected-note {{in instantiation of function template specialization 'tmain<int, 4>' requested here}}
 }
 #endif
Index: clang/lib/Sema/SemaOpenMP.cpp
===================================================================
--- clang/lib/Sema/SemaOpenMP.cpp
+++ clang/lib/Sema/SemaOpenMP.cpp
@@ -17428,6 +17428,7 @@
                           /*CurrentRegionOnly=*/true, CurComponents, CKind))
       break;
     if (CKind == OMPC_map &&
+        (SemaRef.getLangOpts().OpenMP <= 45 || StartLoc.isValid()) &&
         checkMapConflicts(SemaRef, DSAS, CurDeclaration, SimpleExpr,
                           /*CurrentRegionOnly=*/false, CurComponents, CKind))
       break;


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