]> git.ipfire.org Git - thirdparty/gcc.git/commitdiff
OpenMP 5.0: Implement relaxation of implicit map vs. existing device mappings
authorChung-Lin Tang <cltang@codesourcery.com>
Wed, 5 May 2021 15:11:19 +0000 (08:11 -0700)
committerKwok Cheung Yeung <kcy@codesourcery.com>
Mon, 10 May 2021 17:35:58 +0000 (10:35 -0700)
This patch implements relaxing the requirements when a map with the implicit
attribute encounters an overlapping existing map. As the OpenMP 5.0 spec
describes on page 320, lines 18-27 (and 5.1 spec, page 352, lines 13-22):

"If a single contiguous part of the original storage of a list item with an
 implicit data-mapping attribute has corresponding storage in the device data
 environment prior to a task encountering the construct that is associated with
 the map clause, only that part of the original storage will have corresponding
 storage in the device data environment as a result of the map clause."

Also tracked in the OpenMP spec context as issue #1463:
https://github.com/OpenMP/spec/issues/1463

2021-05-05  Chung-Lin Tang  <cltang@codesourcery.com>

include/ChangeLog:

* gomp-constants.h (GOMP_MAP_IMPLICIT): New special map kind bits value.
(GOMP_MAP_FLAG_SPECIAL_BITS): Define helper mask for whole set of
special map kind bits.
(GOMP_MAP_NONCONTIG_ARRAY_P): Adjust test for non-contiguous array map
kind bits to be more specific.
(GOMP_MAP_IMPLICIT_P): New predicate macro for implicit map kinds.

gcc/ChangeLog:

* tree.h (OMP_CLAUSE_MAP_IMPLICIT_P): New access macro for 'implicit'
bit, using 'base.deprecated_flag' field of tree_node.
* tree-pretty-print.c (dump_omp_clause): Add support for printing
implicit attribute in tree dumping.
* gimplify.c (gimplify_adjust_omp_clauses_1):
Set OMP_CLAUSE_MAP_IMPLICIT_P to 1 if map clause is implicitly created.
(gimplify_adjust_omp_clauses): Adjust place of adding implicitly created
clauses, from simple append, to starting of list, after non-map clauses.
* omp-low.c (lower_omp_target): Add GOMP_MAP_IMPLICIT bits into kind
values passed to libgomp for implicit maps.

gcc/testsuite/ChangeLog:

* c-c++-common/gomp/target-implicit-map-1.c: New test.
* c-c++-common/goacc/combined-reduction.c: Adjust scan test pattern.
* c-c++-common/goacc/firstprivate-mappings-1.c: Likewise.
* c-c++-common/goacc/mdc-1.c: Likewise.
        * c-c++-common/goacc/reduction-1.c: Likewise.
        * c-c++-common/goacc/reduction-2.c: Likewise.
        * c-c++-common/goacc/reduction-3.c: Likewise.
        * c-c++-common/goacc/reduction-4.c: Likewise.
        * c-c++-common/goacc/reduction-8.c: Likewise.
        * g++.dg/goacc/firstprivate-mappings-1.C: Likewise.
        * g++.dg/gomp/target-lambda-1.C: Likewise.
        * g++.dg/gomp/target-this-3.C: Likewise.
        * g++.dg/gomp/target-this-4.C: Likewise.
        * gfortran.dg/goacc/common-block-3.f90: Likewise.
        * gfortran.dg/goacc/loop-tree-1.f90: Likewise.
        * gfortran.dg/goacc/private-explicit-kernels-1.f95: Likewise.
* gfortran.dg/goacc/private-predetermined-kernels-1.f95: Likewise.

libgomp/ChangeLog:

* target.c (gomp_map_vars_existing): Add 'bool implicit' parameter, add
implicit map handling to allow a "superset" existing map as valid case.
(get_kind): Adjust to filter out GOMP_MAP_IMPLICIT bits in return value.
(get_implicit): New function to extract implicit status.
(gomp_map_fields_existing): Adjust arguments in calls to
gomp_map_vars_existing, and add uses of get_implicit.
(gomp_map_vars_internal): Likewise.

* testsuite/libgomp.c-c++-common/target-implicit-map-1.c: New test.

28 files changed:
gcc/ChangeLog.omp
gcc/gimplify.c
gcc/omp-low.c
gcc/testsuite/ChangeLog.omp
gcc/testsuite/c-c++-common/goacc/combined-reduction.c
gcc/testsuite/c-c++-common/goacc/firstprivate-mappings-1.c
gcc/testsuite/c-c++-common/goacc/mdc-1.c
gcc/testsuite/c-c++-common/goacc/reduction-1.c
gcc/testsuite/c-c++-common/goacc/reduction-2.c
gcc/testsuite/c-c++-common/goacc/reduction-3.c
gcc/testsuite/c-c++-common/goacc/reduction-4.c
gcc/testsuite/c-c++-common/goacc/reduction-8.c
gcc/testsuite/c-c++-common/gomp/target-implicit-map-1.c [new file with mode: 0644]
gcc/testsuite/g++.dg/goacc/firstprivate-mappings-1.C
gcc/testsuite/g++.dg/gomp/target-lambda-1.C
gcc/testsuite/g++.dg/gomp/target-this-3.C
gcc/testsuite/g++.dg/gomp/target-this-4.C
gcc/testsuite/gfortran.dg/goacc/common-block-3.f90
gcc/testsuite/gfortran.dg/goacc/loop-tree-1.f90
gcc/testsuite/gfortran.dg/goacc/private-explicit-kernels-1.f95
gcc/testsuite/gfortran.dg/goacc/private-predetermined-kernels-1.f95
gcc/tree-pretty-print.c
gcc/tree.h
include/ChangeLog.omp
include/gomp-constants.h
libgomp/ChangeLog.omp
libgomp/target.c
libgomp/testsuite/libgomp.c-c++-common/target-implicit-map-1.c [new file with mode: 0644]

index dc5a0321e8562977a22cb600fddb7e283ad88ac4..add9b1754faa46dd80eb2b11c0ead027d6ecf83a 100644 (file)
@@ -1,3 +1,16 @@
+2021-05-05  Chung-Lin Tang  <cltang@codesourcery.com>
+
+       * tree.h (OMP_CLAUSE_MAP_IMPLICIT_P): New access macro for 'implicit'
+       bit, using 'base.deprecated_flag' field of tree_node.
+       * tree-pretty-print.c (dump_omp_clause): Add support for printing
+       implicit attribute in tree dumping.
+       * gimplify.c (gimplify_adjust_omp_clauses_1):
+       Set OMP_CLAUSE_MAP_IMPLICIT_P to 1 if map clause is implicitly created.
+       (gimplify_adjust_omp_clauses): Adjust place of adding implicitly created
+       clauses, from simple append, to starting of list, after non-map clauses.
+       * omp-low.c (lower_omp_target): Add GOMP_MAP_IMPLICIT bits into kind
+       values passed to libgomp for implicit maps.
+
 2021-04-30  Kwok Cheung Yeung  <kcy@codesourcery.com>
 
        Backport from mainline
index 0dd8e7d71b4df701cdae645995c15d9a2c017bb5..e49e543fc3529df8e8d47b53d6667bdee8e6d771 100644 (file)
@@ -10670,6 +10670,7 @@ gimplify_adjust_omp_clauses_1 (splay_tree_node n, void *data)
          gcc_unreachable ();
        }
       OMP_CLAUSE_SET_MAP_KIND (clause, kind);
+      OMP_CLAUSE_MAP_IMPLICIT_P (clause) = 1;
       if (DECL_SIZE (decl)
          && TREE_CODE (DECL_SIZE (decl)) != INTEGER_CST)
        {
@@ -11286,9 +11287,15 @@ gimplify_adjust_omp_clauses (gimple_seq *pre_p, gimple_seq body, tree *list_p,
        list_p = &OMP_CLAUSE_CHAIN (c);
     }
 
-  /* Add in any implicit data sharing.  */
+  /* Add in any implicit data sharing. Implicit clauses are added at the start
+     of the clause list, but after any non-map clauses.  */
   struct gimplify_adjust_omp_clauses_data data;
-  data.list_p = list_p;
+  tree *implicit_add_list_p = orig_list_p;
+  while (*implicit_add_list_p
+        && OMP_CLAUSE_CODE (*implicit_add_list_p) != OMP_CLAUSE_MAP)
+    implicit_add_list_p = &OMP_CLAUSE_CHAIN (*implicit_add_list_p);
+
+  data.list_p = implicit_add_list_p;
   data.pre_p = pre_p;
   splay_tree_foreach (ctx->variables, gimplify_adjust_omp_clauses_1, &data);
 
index 0251dbe7186b3294585fa094a81fed638d2554eb..a8675800c56ceffce4715f0e2bffd735247d2da0 100644 (file)
@@ -13021,6 +13021,19 @@ lower_omp_target (gimple_stmt_iterator *gsi_p, omp_context *ctx)
                    else if (integer_nonzerop (s))
                      tkind_zero = tkind;
                  }
+               if (tkind_zero == tkind
+                   && OMP_CLAUSE_MAP_IMPLICIT_P (c)
+                   && (((tkind & GOMP_MAP_FLAG_SPECIAL_BITS)
+                        & ~GOMP_MAP_IMPLICIT)
+                       == 0))
+                 {
+                   /* If this is an implicit map, and the GOMP_MAP_IMPLICIT
+                      bits are not interfered by other special bit encodings,
+                      then turn the GOMP_IMPLICIT_BIT flag on for the runtime
+                      to see.  */
+                   tkind |= GOMP_MAP_IMPLICIT;
+                   tkind_zero = tkind;
+                 }
                break;
              case OMP_CLAUSE_FIRSTPRIVATE:
                gcc_checking_assert (is_gimple_omp_oacc (ctx->stmt));
index 9a3e21a579bdedabb9e08aad76a56ca251d9d542..89fc9619722ef4bf9b1a08e5b7095544d42db5b2 100644 (file)
@@ -1,3 +1,23 @@
+2021-05-05  Chung-Lin Tang  <cltang@codesourcery.com>
+
+       * c-c++-common/gomp/target-implicit-map-1.c: New test.
+       * c-c++-common/goacc/combined-reduction.c: Adjust scan test pattern.
+       * c-c++-common/goacc/firstprivate-mappings-1.c: Likewise.
+       * c-c++-common/goacc/mdc-1.c: Likewise.
+       * c-c++-common/goacc/reduction-1.c: Likewise.
+       * c-c++-common/goacc/reduction-2.c: Likewise.
+       * c-c++-common/goacc/reduction-3.c: Likewise.
+       * c-c++-common/goacc/reduction-4.c: Likewise.
+       * c-c++-common/goacc/reduction-8.c: Likewise.
+       * g++.dg/goacc/firstprivate-mappings-1.C: Likewise.
+       * g++.dg/gomp/target-lambda-1.C: Likewise.
+       * g++.dg/gomp/target-this-3.C: Likewise.
+       * g++.dg/gomp/target-this-4.C: Likewise.
+       * gfortran.dg/goacc/common-block-3.f90: Likewise.
+       * gfortran.dg/goacc/loop-tree-1.f90: Likewise.
+       * gfortran.dg/goacc/private-explicit-kernels-1.f95: Likewise.
+       * gfortran.dg/goacc/private-predetermined-kernels-1.f95: Likewise.
+
 2021-04-30  Kwok Cheung Yeung  <kcy@codesourcery.com>
 
        * c-c++-common/goacc/note-parallelism-1-kernels-straight-line.c: Add
index ecf23f59d66073b8fe44a06222a93bf92bc8df78..fa67e085c86184ed7d7f7748249ffa0ed9661204 100644 (file)
@@ -23,7 +23,7 @@ main ()
   return 0;
 }
 
-/* { dg-final { scan-tree-dump-times "omp target oacc_parallel reduction.+:v1. map.tofrom:v1" 1 "gimple" } } */
+/* { dg-final { scan-tree-dump-times "omp target oacc_parallel reduction.+:v1. firstprivate.n. map.tofrom:v1" 1 "gimple" } } */
 /* { dg-final { scan-tree-dump-times "acc loop reduction.+:v1. private.i." 1 "gimple" } } */
-/* { dg-final { scan-tree-dump-times "omp target oacc_kernels map.force_tofrom:n .len: 4.. map.force_tofrom:v1 .len: 4.." 1 "gimple" } } */
+/* { dg-final { scan-tree-dump-times "omp target oacc_kernels map.force_tofrom:n .len: 4..implicit.. map.force_tofrom:v1 .len: 4..implicit.." 1 "gimple" } } */
 /* { dg-final { scan-tree-dump-times "acc loop reduction.+:v1. private.i." 1 "gimple" } } */
index 7987beaed9a2eee5204e9d3865084996e0f9ab24..f43e4b46cb6965b06687549105ac439fb570fc61 100644 (file)
@@ -419,12 +419,12 @@ vla (int array_li)
   copyout (array_so)
   /* The gimplifier has created an implicit 'firstprivate' clause for the array
      length.
-     { dg-final { scan-tree-dump {(?n)#pragma omp target oacc_parallel map\(from:array_so \[len: 4\]\) firstprivate\(array_li.[0-9]+\)} omplower { target { ! c++ } } } }
-     { dg-final { scan-tree-dump {(?n)#pragma omp target oacc_parallel map\(from:array_so \[len: 4\]\) firstprivate\(} omplower { target { c++ } } } }
+     { dg-final { scan-tree-dump {(?n)#pragma omp target oacc_parallel firstprivate\(array_li.[0-9]+\) map\(from:array_so \[len: 4\]\)} omplower { target { ! c++ } } } }
+     { dg-final { scan-tree-dump {(?n)#pragma omp target oacc_parallel firstprivate\([^)]+\) map\(from:array_so \[len: 4\]\)} omplower { target { c++ } } } }
      (C++ computes an intermediate value, so can't scan for 'firstprivate(array_li)'.)  */
   /* For C, non-LP64, the gimplifier has also created a mapping for the array
      itself; PR90859.
-     { dg-final { scan-tree-dump {(?n)#pragma omp target oacc_parallel map\(from:array_so \[len: 4\]\) firstprivate\(array_li.[0-9]+\) map\(tofrom:\(\*array.[0-9]+\) \[len: D\.[0-9]+\]\) map\(firstprivate:array \[pointer assign, bias: 0\]\) \[} omplower { target { c && { ! lp64 } } } } } */
+     { dg-final { scan-tree-dump {(?n)#pragma omp target oacc_parallel firstprivate\(array_li.[0-9]+\) map\(tofrom:\(\*array.[0-9]+\) \[len: D\.[0-9]+\]\[implicit\]\) map\(firstprivate:array \[pointer assign, bias: 0\]\) map\(from:array_so \[len: 4\]\) \[} omplower { target { c && { ! lp64 } } } } } */
   {
     array_so = sizeof array;
   }
index 337c1f7cc77ebb3786b161c3097e22c433078b38..9f43de4f776da272ef8fed5c89c8b73b7445fc0a 100644 (file)
@@ -45,7 +45,7 @@ t1 ()
 
 /* { dg-final { scan-tree-dump-times "pragma omp target oacc_enter_exit_data map.to:s .len: 32.." 1 "omplower" } } */
 /* { dg-final { scan-tree-dump-times "pragma omp target oacc_data map.tofrom:.z .len: 40.. map.struct:s .len: 1.. map.alloc:s.a .len: 8.. map.tofrom:._1 .len: 40.. map.attach:s.a .bias: 0.." 1 "omplower" } } */
-/* { dg-final { scan-tree-dump-times "pragma omp target oacc_parallel map.attach:s.e .bias: 0.. map.tofrom:s .len: 32" 1 "omplower" } } */
+/* { dg-final { scan-tree-dump-times "pragma omp target oacc_parallel map.tofrom:s .len: 32..implicit.. map.attach:s.e .bias: 0.." 1 "omplower" } } */
 /* { dg-final { scan-tree-dump-times "pragma omp target oacc_enter_exit_data map.attach:a .bias: 0.." 1 "omplower" } } */
 /* { dg-final { scan-tree-dump-times "pragma omp target oacc_enter_exit_data map.detach:a .bias: 0.." 1 "omplower" } } */
 /* { dg-final { scan-tree-dump-times "pragma omp target oacc_enter_exit_data map.to:a .len: 8.." 1 "omplower" } } */
index 35bfc868708e448d99fe06e2b19e5bbadf1a06cc..d9e3c380b8e0faed9980cfe9a995b27ace047f27 100644 (file)
@@ -68,5 +68,5 @@ main(void)
 }
 
 /* Check that default copy maps are generated for loop reductions.  */
-/* { dg-final { scan-tree-dump-times "map\\(tofrom:result \\\[len: \[0-9\]+\\\]\\)" 7 "gimple" } } */
-/* { dg-final { scan-tree-dump-times "map\\(tofrom:lresult \\\[len: \[0-9\]+\\\]\\)" 2 "gimple" } } */
+/* { dg-final { scan-tree-dump-times "map\\(tofrom:result \\\[len: \[0-9\]+\\\]\\\[implicit\\\]\\)" 7 "gimple" } } */
+/* { dg-final { scan-tree-dump-times "map\\(tofrom:lresult \\\[len: \[0-9\]+\\\]\\\[implicit\\\]\\)" 2 "gimple" } } */
index 9dba035adb6eb80be8e158c54b333196fb6afe1f..18dc03c93acb3b65f0c41ac4c00a63e777d1e634 100644 (file)
@@ -50,5 +50,5 @@ main(void)
 }
 
 /* Check that default copy maps are generated for loop reductions.  */
-/* { dg-final { scan-tree-dump-times "map\\(tofrom:result \\\[len: \[0-9\]+\\\]\\)" 4 "gimple" } } */
-/* { dg-final { scan-tree-dump-times "map\\(tofrom:lresult \\\[len: \[0-9\]+\\\]\\)" 2 "gimple" } } */
+/* { dg-final { scan-tree-dump-times "map\\(tofrom:result \\\[len: \[0-9\]+\\\]\\\[implicit\\\]\\)" 4 "gimple" } } */
+/* { dg-final { scan-tree-dump-times "map\\(tofrom:lresult \\\[len: \[0-9\]+\\\]\\\[implicit\\\]\\)" 2 "gimple" } } */
index 669cd43811339174fa89694cdf57dce466f1f997..2311d4b0adb9101305e8b06fcbd6448484031a91 100644 (file)
@@ -50,5 +50,5 @@ main(void)
 }
 
 /* Check that default copy maps are generated for loop reductions.  */
-/* { dg-final { scan-tree-dump-times "map\\(tofrom:result \\\[len: \[0-9\]+\\\]\\)" 4 "gimple" } } */
-/* { dg-final { scan-tree-dump-times "map\\(tofrom:lresult \\\[len: \[0-9\]+\\\]\\)" 2 "gimple" } } */
+/* { dg-final { scan-tree-dump-times "map\\(tofrom:result \\\[len: \[0-9\]+\\\]\\\[implicit\\\]\\)" 4 "gimple" } } */
+/* { dg-final { scan-tree-dump-times "map\\(tofrom:lresult \\\[len: \[0-9\]+\\\]\\\[implicit\\\]\\)" 2 "gimple" } } */
index 5c3dfb1917218c3c5252e1d7cace7f65eba38fda..57823f8898f9d2bea07d7d3bcdfb0701d3d851b4 100644 (file)
@@ -38,5 +38,5 @@ main(void)
 }
 
 /* Check that default copy maps are generated for loop reductions.  */
-/* { dg-final { scan-tree-dump-times "map\\(tofrom:result \\\[len: \[0-9\]+\\\]\\)" 2 "gimple" } } */
-/* { dg-final { scan-tree-dump-times "map\\(tofrom:lresult \\\[len: \[0-9\]+\\\]\\)" 2 "gimple" } } */
+/* { dg-final { scan-tree-dump-times "map\\(tofrom:result \\\[len: \[0-9\]+\\\]\\\[implicit\\\]\\)" 2 "gimple" } } */
+/* { dg-final { scan-tree-dump-times "map\\(tofrom:lresult \\\[len: \[0-9\]+\\\]\\\[implicit\\\]\\)" 2 "gimple" } } */
index 8a0283f4ac3f71bc0fbe06fa5504cdc59afaef8e..8494e5946652d39ec98fa0b782ec3b2b794d7810 100644 (file)
@@ -87,8 +87,10 @@ main(void)
 
 /* Check that default copy maps are generated for loop reductions.  */
 /* { dg-final { scan-tree-dump-times "reduction..:result. map.tofrom:result .len: 4.." 1 "gimple" } } */
-/* { dg-final { scan-tree-dump-times "oacc_parallel map.tofrom:result .len: 4.." 2 "gimple" } } */
-/* { dg-final { scan-tree-dump-times "map.tofrom:array .len: 4000.. firstprivate.result." 3 "gimple" } } */
-/* { dg-final { scan-tree-dump-times "map.tofrom:result .len: 4.. map.tofrom:array .len: 4000.." 1 "gimple" } } */
-/* { dg-final { scan-tree-dump-times "map.tofrom:array .len: 4000.. map.force_tofrom:result .len: 4.." 1 "gimple" } } */
+
+/* { dg-final { scan-tree-dump-times "oacc_parallel map.tofrom:result .len: 4..implicit.." 1 "gimple" } } */
+
+/* { dg-final { scan-tree-dump-times "map.tofrom:array .len: 4000..implicit.. firstprivate.result." 3 "gimple" } } */
+/* { dg-final { scan-tree-dump-times "map.tofrom:array .len: 4000..implicit.. map.tofrom:result .len: 4.." 1 "gimple" } } */
+/* { dg-final { scan-tree-dump-times "map.tofrom:array .len: 4000..implicit.. map.force_tofrom:result .len: 4..implicit.." 1 "gimple" } } */
 
diff --git a/gcc/testsuite/c-c++-common/gomp/target-implicit-map-1.c b/gcc/testsuite/c-c++-common/gomp/target-implicit-map-1.c
new file mode 100644 (file)
index 0000000..52944fd
--- /dev/null
@@ -0,0 +1,39 @@
+/* { dg-do compile } */
+/* { dg-additional-options "-fdump-tree-gimple" } */
+#ifdef __cplusplus
+extern "C"
+#else
+extern
+#endif
+void abort (void);
+
+int
+main (void)
+{
+  #define N 5
+  int array[N][N];
+
+  for (int i = 0; i < N; i++)
+    {
+      #pragma omp target enter data map(alloc: array[i:1][0:N])
+
+      #pragma omp target
+      for (int j = 0; j < N; j++)
+       array[i][j] = i * 10 + j;
+
+      #pragma omp target exit data map(from: array[i:1][0:N])
+    }
+
+  for (int i = 0; i < N; i++)
+    for (int j = 0; j < N; j++)
+      if (array[i][j] != i + j)
+       abort ();
+
+  return 0;
+}
+
+/* { dg-final { scan-tree-dump {#pragma omp target enter data map\(alloc:array\[[^]]+\]\[0\] \[len: [0-9]+\]\)} "gimple" } } */
+
+/* { dg-final { scan-tree-dump {#pragma omp target num_teams.* firstprivate\(i\) map\(tofrom:array \[len: [0-9]+\]\[implicit\]\)} "gimple" } } */
+
+/* { dg-final { scan-tree-dump {#pragma omp target exit data map\(from:array\[[^]]+\]\[0\] \[len: [0-9]+\]\)} "gimple" } } */
index 1b1badb1a9040c419b169b88e48410e2a82e75f9..99a3bd472f7bbd59293b7e95495567ce0d30ca9c 100644 (file)
@@ -416,7 +416,7 @@ vla (int &array_li)
   copyout (array_so)
   /* The gimplifier has created an implicit 'firstprivate' clause for the array
      length.
-     { dg-final { scan-tree-dump {(?n)#pragma omp target oacc_parallel map\(from:array_so \[len: 4\]\) firstprivate\(} omplower } }
+     { dg-final { scan-tree-dump {(?n)#pragma omp target oacc_parallel firstprivate\([^)]+\) map\(from:array_so \[len: 4\]\)} omplower } }
      (C++ computes an intermediate value, so can't scan for 'firstprivate(array_li)'.)  */
   {
     array_so = sizeof array;
index 7dceef80f478b422ba860b6c70ee55f4e96c7e3f..e5a24d7abc4a379065c0906089d78d6ca0cf6c19 100644 (file)
@@ -87,8 +87,8 @@ int main (void)
   return 0;
 }
 
-/* { dg-final { scan-tree-dump {#pragma omp target num_teams.* map\(to:\*__closure \[len: [0-9]+\]\) map\(firstprivate:__closure \[pointer assign, bias: 0\]\) map\(attach_zero_length_array_section:__closure->__iptr \[bias: 0\]\) map\(struct:\*__closure \[len: 1\]\) map\(alloc:__closure->__this \[len: [0-9]+\]\) map\(tofrom:\*_[0-9]+ \[len: [0-9]+\]\) map\(always_pointer:__closure->__this \[pointer assign, bias: 0\]\) map\(attach_zero_length_array_section:_[0-9]+->ptr \[bias: 0\]\) map\(from:mapped \[len: [0-9]+\]\) map\(alloc:\*_[0-9]+ \[len: 0\]\) map\(alloc:\*_[0-9]+ \[len: 0\]\) firstprivate\(b\) map\(alloc:MEM.* \[len: 0\]\) map\(firstprivate:iptr \[pointer assign, bias: 0\]\) map\(alloc:MEM.* \[len: 0\]\) map\(firstprivate:this \[pointer assign, bias: 0\]\)} "gimple" } } */
+/* { dg-final { scan-tree-dump {#pragma omp target num_teams.* firstprivate\(b\) map\(alloc:MEM.* \[len: 0\]\) map\(firstprivate:iptr \[pointer assign, bias: 0\]\) map\(alloc:MEM.* \[len: 0\]\) map\(firstprivate:this \[pointer assign, bias: 0\]\) map\(to:\*__closure \[len: [0-9]+\]\) map\(firstprivate:__closure \[pointer assign, bias: 0\]\) map\(attach_zero_length_array_section:__closure->__iptr \[bias: 0\]\) map\(struct:\*__closure \[len: 1\]\) map\(alloc:__closure->__this \[len: [0-9]+\]\) map\(tofrom:\*_[0-9]+ \[len: [0-9]+\]\) map\(always_pointer:__closure->__this \[pointer assign, bias: 0\]\) map\(attach_zero_length_array_section:_[0-9]+->ptr \[bias: 0\]\) map\(from:mapped \[len: [0-9]+\]\) map\(alloc:\*_[0-9]+ \[len: 0\]\) map\(alloc:\*_[0-9]+ \[len: 0\]\)} "gimple" } } */
 
-/* { dg-final { scan-tree-dump {#pragma omp target num_teams.* map\(to:loop \[len: [0-9]+\]\) map\(attach_zero_length_array_section:loop\.__data1 \[bias: 0\]\) map\(alloc:\*_[0-9]+ \[len: 0\]\) firstprivate\(end\) firstprivate\(begin\)} "gimple" } } */
+/* { dg-final { scan-tree-dump {#pragma omp target num_teams.* firstprivate\(end\) firstprivate\(begin\) map\(to:loop \[len: [0-9]+\]\) map\(attach_zero_length_array_section:loop\.__data1 \[bias: 0\]\) map\(alloc:\*_[0-9]+ \[len: 0\]\)} "gimple" } } */
 
-/* { dg-final { scan-tree-dump {#pragma omp target num_teams.* map\(to:loop \[len: [0-9]+\]\) map\(attach_zero_length_array_section:loop\.__data2 \[bias: 0\]\) map\(alloc:\*_[0-9]+ \[len: 0\]\) firstprivate\(end\) firstprivate\(begin\)} "gimple" } } */
+/* { dg-final { scan-tree-dump {#pragma omp target num_teams.* firstprivate\(end\) firstprivate\(begin\) map\(to:loop \[len: [0-9]+\]\) map\(attach_zero_length_array_section:loop\.__data2 \[bias: 0\]\) map\(alloc:\*_[0-9]+ \[len: 0\]\)} "gimple" } } */
index 08568f9284c1cb481fd25648512198672fb9ee0d..2755b4b58bdb46f97d3c1954e724872d775fc274 100644 (file)
@@ -100,6 +100,6 @@ int main (void)
   return 0;
 }
 
-/* { dg-final { scan-tree-dump {#pragma omp target num_teams.* map\(tofrom:\*this \[len: [0-9]+\]\) map\(firstprivate:this \[pointer assign, bias: 0\]\) map\(alloc:\*_[0-9]+ \[pointer assign, zero-length array section, bias: 0\]\) map\(attach:this->refptr \[bias: 0\]\) map\(from:mapped \[len: [0-9]+\]\) map\(alloc:\*_[0-9+] \[len: 0\]\) firstprivate\(n\)} "gimple" } } */
+/* { dg-final { scan-tree-dump {#pragma omp target num_teams.* firstprivate\(n\) map\(tofrom:\*this \[len: [0-9]+\]\) map\(firstprivate:this \[pointer assign, bias: 0\]\) map\(alloc:\*_[0-9]+ \[pointer assign, zero-length array section, bias: 0\]\) map\(attach:this->refptr \[bias: 0\]\) map\(from:mapped \[len: [0-9]+\]\) map\(alloc:\*_[0-9+] \[len: 0\]\)} "gimple" } } */
 
-/* { dg-final { scan-tree-dump {#pragma omp target num_teams.* map\(tofrom:\*this \[len: [0-9]+\]\) map\(firstprivate:this \[pointer assign, bias: 0\]\) map\(attach_zero_length_array_section:this->ptr \[bias: 0\]\) map\(from:mapped \[len: [0-9]+\]\) map\(alloc:\*_[0-9]+ \[len: 0\]\) firstprivate\(n\)} "gimple" } } */
+/* { dg-final { scan-tree-dump {#pragma omp target num_teams.* firstprivate\(n\) map\(tofrom:\*this \[len: [0-9]+\]\) map\(firstprivate:this \[pointer assign, bias: 0\]\) map\(attach_zero_length_array_section:this->ptr \[bias: 0\]\) map\(from:mapped \[len: [0-9]+\]\) map\(alloc:\*_[0-9]+ \[len: 0\]\)} "gimple" } } */
index 3b2d5811350bfe1efb36e1f3f75e9b10c13b2565..3703762f45a655158b62cfe25c30b237ab515144 100644 (file)
@@ -102,6 +102,6 @@ int main (void)
   return 0;
 }
 
-/* { dg-final { scan-tree-dump {#pragma omp target num_teams.* map\(to:\*__closure \[len: [0-9]+\]\) map\(firstprivate:__closure \[pointer assign, bias: 0\]\) map\(struct:\*__closure \[len: 1\]\) map\(alloc:__closure->__this \[len: [0-9]+\]\) map\(tofrom:\*_[0-9]+ \[len: [0-9]+\]\) map\(always_pointer:__closure->__this \[pointer assign, bias: 0\]\) map\(attach_zero_length_array_section:_[0-9]+->ptr \[bias: 0\]\) map\(from:mapped \[len: 1\]\) map\(alloc:\*_[0-9]+ \[len: 0\]\) firstprivate\(n\) map\(alloc:MEM.* \[len: 0\]\) map\(firstprivate:this \[pointer assign, bias: 0\]\)} "gimple" } } */
+/* { dg-final { scan-tree-dump {#pragma omp target num_teams.* firstprivate\(n\) map\(alloc:MEM.* \[len: 0\]\) map\(firstprivate:this \[pointer assign, bias: 0\]\) map\(to:\*__closure \[len: [0-9]+\]\) map\(firstprivate:__closure \[pointer assign, bias: 0\]\) map\(struct:\*__closure \[len: 1\]\) map\(alloc:__closure->__this \[len: [0-9]+\]\) map\(tofrom:\*_[0-9]+ \[len: [0-9]+\]\) map\(always_pointer:__closure->__this \[pointer assign, bias: 0\]\) map\(attach_zero_length_array_section:_[0-9]+->ptr \[bias: 0\]\) map\(from:mapped \[len: 1\]\) map\(alloc:\*_[0-9]+ \[len: 0\]\)} "gimple" } } */
 
-/* { dg-final { scan-tree-dump {#pragma omp target num_teams.* map\(to:\*__closure \[len: [0-9]+\]\) map\(firstprivate:__closure \[pointer assign, bias: 0\]\) map\(struct:\*__closure \[len: 1\]\) map\(alloc:__closure->__this \[len: [0-9]+\]\) map\(tofrom:\*_[0-9]+ \[len: [0-9]+\]\) map\(always_pointer:__closure->__this \[pointer assign, bias: 0\]\) map\(alloc:\*_[0-9]+ \[pointer assign, zero-length array section, bias: 0\]\) map\(attach:_[0-9]+->refptr \[bias: 0\]\) map\(from:mapped \[len: [0-9]+\]\) map\(alloc:\*_[0-9]+ \[len: 0\]\) firstprivate\(n\) map\(alloc:MEM.* \[len: 0\]\) map\(firstprivate:this \[pointer assign, bias: 0\]\)} "gimple" } } */
+/* { dg-final { scan-tree-dump {#pragma omp target num_teams.* firstprivate\(n\) map\(alloc:MEM.* \[len: 0\]\) map\(firstprivate:this \[pointer assign, bias: 0\]\) map\(to:\*__closure \[len: [0-9]+\]\) map\(firstprivate:__closure \[pointer assign, bias: 0\]\) map\(struct:\*__closure \[len: 1\]\) map\(alloc:__closure->__this \[len: [0-9]+\]\) map\(tofrom:\*_[0-9]+ \[len: [0-9]+\]\) map\(always_pointer:__closure->__this \[pointer assign, bias: 0\]\) map\(alloc:\*_[0-9]+ \[pointer assign, zero-length array section, bias: 0\]\) map\(attach:_[0-9]+->refptr \[bias: 0\]\) map\(from:mapped \[len: [0-9]+\]\) map\(alloc:\*_[0-9]+ \[len: 0\]\)} "gimple" } } */
index e43d376fc28e4752876722fc46f9542879d1755f..e9f169f9517886bf327c0fd65fc9efb36c2ea11b 100644 (file)
@@ -33,10 +33,10 @@ end program main
 
 ! { dg-final { scan-tree-dump-times "omp target oacc_data_kernels .*map\\(tofrom:x \\\[len: 400\\\]\\)" 1 "omplower" } }
 ! { dg-final { scan-tree-dump-times "omp target oacc_data_kernels .*map\\(tofrom:y \\\[len: 400\\\]\\\)" 1 "omplower" } }
-! { dg-final { scan-tree-dump-times "omp target oacc_kernels .*map\\(force_present:x \\\[len: 400\\\]\\)" 1 "omplower" } }
-! { dg-final { scan-tree-dump-times "omp target oacc_kernels .*map\\(force_present:y \\\[len: 400\\\]\\\)" 1 "omplower" } }
-! { dg-final { scan-tree-dump-times "omp target oacc_kernels .*map\\(force_tofrom:i \\\[len: 4\\\]\\)" 1 "omplower" } }
-! { dg-final { scan-tree-dump-times "omp target oacc_kernels .*map\\(force_tofrom:c \\\[len: 4\\\]\\)" 1 "omplower" } }
+! { dg-final { scan-tree-dump-times "omp target oacc_kernels .*map\\(force_present:x \\\[len: 400\\\]\\\[implicit\\\]\\)" 1 "omplower" } }
+! { dg-final { scan-tree-dump-times "omp target oacc_kernels .*map\\(force_present:y \\\[len: 400\\\]\\\[implicit\\\]\\\)" 1 "omplower" } }
+! { dg-final { scan-tree-dump-times "omp target oacc_kernels .*map\\(force_tofrom:i \\\[len: 4\\\]\\\[implicit\\\]\\)" 1 "omplower" } }
+! { dg-final { scan-tree-dump-times "omp target oacc_kernels .*map\\(force_tofrom:c \\\[len: 4\\\]\\\[implicit\\\]\\)" 1 "omplower" } }
 
 ! Expecting no mapping of un-referenced common-blocks variables
 
index 150f9304e461599902f3359d0cc7146fccdc3558..4cdfc5556b7bd3ed9b8cf6e336dbbd2b54027521 100644 (file)
@@ -44,4 +44,4 @@ end program test
 
 ! { dg-final { scan-tree-dump-times "private\\(m\\)" 1 "original" } } 
 ! { dg-final { scan-tree-dump-times "reduction\\(\\+:sum\\)" 1 "original" } } 
-! { dg-final { scan-tree-dump-times "map\\(tofrom:sum \\\[len: \[0-9\]+\\\]\\)" 1 "gimple" } }
+! { dg-final { scan-tree-dump-times "map\\(tofrom:sum \\\[len: \[0-9\]+\\\]\\\[implicit\\\]\\)" 1 "gimple" } }
index 0c47045df9c82f507bd3287a0223fb5e47f7441c..fef512612bd91e7db6e0346eff3c0062a04a559d 100644 (file)
@@ -83,7 +83,7 @@ program test
   !$acc kernels ! Explicit "private(i2_2_s)" clause cannot be specified here.
   ! { dg-final { scan-tree-dump-times "private\\(i2_2_s\\)" 1 "original" { xfail *-*-* } } } ! PR90067
   ! { dg-final { scan-tree-dump-times "private\\(i2_2_s\\)" 1 "gimple" { xfail *-*-* } } } ! PR90067
-  ! { dg-final { scan-tree-dump-times "#pragma omp target oacc_kernels map\\(force_tofrom:i2_2_s \\\[len: \[0-9\]+\\\]\\)" 0 "gimple" { xfail *-*-* } } } ! PR90067
+  ! { dg-final { scan-tree-dump-times "#pragma omp target oacc_kernels map\\(force_tofrom:i2_2_s \\\[len: \[0-9\]+\\\]\\\[implicit\\\]\\)" 0 "gimple" { xfail *-*-* } } } ! PR90067
   do i2_2_s = 1, 100
      !$acc loop private(j2_2_s) independent
      ! { dg-final { scan-tree-dump-times "#pragma acc loop private\\(j2_2_s\\) independent" 1 "original" } }
@@ -234,7 +234,7 @@ program test
   !$acc kernels ! Explicit "private(i3_5_s)" clause cannot be specified here.
   ! { dg-final { scan-tree-dump-times "private\\(i3_5_s\\)" 1 "original" { xfail *-*-* } } } ! PR90067
   ! { dg-final { scan-tree-dump-times "private\\(i3_5_s\\)" 1 "gimple" { xfail *-*-* } } } ! PR90067
-  ! { dg-final { scan-tree-dump-times "#pragma omp target oacc_kernels map\\(force_tofrom:i3_5_s \\\[len: \[0-9\]+\\\]\\)" 0 "gimple" { xfail *-*-* } } } ! PR90067
+  ! { dg-final { scan-tree-dump-times "#pragma omp target oacc_kernels map\\(force_tofrom:i3_5_s \\\[len: \[0-9\]+\\\]\\\[implicit\\\]\\)" 0 "gimple" { xfail *-*-* } } } ! PR90067
   do i3_5_s = 1, 100
      !$acc loop private(j3_5_s) independent
      ! { dg-final { scan-tree-dump-times "#pragma acc loop private\\(j3_5_s\\) independent" 1 "original" } }
index 3357a20263e702fb6d599d773d38f3876e9d9fa5..38459cfadf33fe178d4a4cb49c2dc1ab12c3d36c 100644 (file)
@@ -83,7 +83,7 @@ program test
   !$acc kernels
   ! { dg-final { scan-tree-dump-times "private\\(i2_2_s\\)" 1 "original" { xfail *-*-* } } } ! PR90067
   ! { dg-final { scan-tree-dump-times "private\\(i2_2_s\\)" 1 "gimple" { xfail *-*-* } } } ! PR90067
-  ! { dg-final { scan-tree-dump-times "#pragma omp target oacc_kernels map\\(force_tofrom:i2_2_s \\\[len: \[0-9\]+\\\]\\)" 0 "gimple" { xfail *-*-* } } } ! PR90067
+  ! { dg-final { scan-tree-dump-times "#pragma omp target oacc_kernels map\\(force_tofrom:i2_2_s \\\[len: \[0-9\]+\\\]\\\[implicit\\\]\\)" 0 "gimple" { xfail *-*-* } } } ! PR90067
   do i2_2_s = 1, 100
      !$acc loop independent
      ! { dg-final { scan-tree-dump-times "#pragma acc loop private\\(j2_2_s\\) independent" 1 "original" } }
@@ -234,7 +234,7 @@ program test
   !$acc kernels
   ! { dg-final { scan-tree-dump-times "private\\(i3_5_s\\)" 1 "original" { xfail *-*-* } } } ! PR90067
   ! { dg-final { scan-tree-dump-times "private\\(i3_5_s\\)" 1 "gimple" { xfail *-*-* } } } ! PR90067
-  ! { dg-final { scan-tree-dump-times "#pragma omp target oacc_kernels map\\(force_tofrom:i3_5_s \\\[len: \[0-9\]+\\\]\\)" 0 "gimple" { xfail *-*-* } } } ! PR90067
+  ! { dg-final { scan-tree-dump-times "#pragma omp target oacc_kernels map\\(force_tofrom:i3_5_s \\\[len: \[0-9\]+\\\]\\\[implicit\\\]\\)" 0 "gimple" { xfail *-*-* } } } ! PR90067
   do i3_5_s = 1, 100
      !$acc loop independent
      ! { dg-final { scan-tree-dump-times "#pragma acc loop private\\(j3_5_s\\) independent" 1 "original" } }
index 18f4c622180a33435526d1b06003ec49c9cb4460..56d0fa6bd6e79a9738ed2a37a187a7a858823c1a 100644 (file)
@@ -977,6 +977,9 @@ dump_omp_clause (pretty_printer *pp, tree clause, int spc, dump_flags_t flags)
                             spc, flags, false);
          pp_right_bracket (pp);
        }
+      if (OMP_CLAUSE_CODE (clause) == OMP_CLAUSE_MAP
+         && OMP_CLAUSE_MAP_IMPLICIT_P (clause))
+       pp_string (pp, "[implicit]");
       pp_right_paren (pp);
       break;
 
index edf4fd3797923dd9ac4e7f2d5fad158aafaaff8f..72cce9778f2d428275713f387ff34494b2cb1cb5 100644 (file)
@@ -1649,6 +1649,10 @@ class auto_suppress_location_wrappers
    variable.  */
 #define OMP_CLAUSE_MAP_IN_REDUCTION(NODE) \
   TREE_PRIVATE (OMP_CLAUSE_SUBCODE_CHECK (NODE, OMP_CLAUSE_MAP))
+/* Nonzero if this map clause was created through implicit data-mapping
+   rules. */
+#define OMP_CLAUSE_MAP_IMPLICIT_P(NODE) \
+  (OMP_CLAUSE_SUBCODE_CHECK (NODE, OMP_CLAUSE_MAP)->base.deprecated_flag)
 
 /* True on an OMP_CLAUSE_USE_DEVICE_PTR with an OpenACC 'if_present'
    clause.  */
index a460e639d22993f14fc7831c85d70eb3051751a9..c4b3e729533199d953c319087476107e4ba23c1a 100644 (file)
@@ -1,3 +1,12 @@
+2021-05-05  Chung-Lin Tang  <cltang@codesourcery.com>
+
+       * gomp-constants.h (GOMP_MAP_IMPLICIT): New special map kind bits value.
+       (GOMP_MAP_FLAG_SPECIAL_BITS): Define helper mask for whole set of
+       special map kind bits.
+       (GOMP_MAP_NONCONTIG_ARRAY_P): Adjust test for non-contiguous array map
+       kind bits to be more specific.
+       (GOMP_MAP_IMPLICIT_P): New predicate macro for implicit map kinds.
+
 2018-10-04  Cesar Philippidis  <cesar@codesourcery.com>
             Julian Brown  <julian@codesourcery.com>
 
index d9b80ac97327c3aaf1f1a16b00f641f8a9fbf38e..a995ad9379f10efc4a3a8a2158d41ec51f9217d9 100644 (file)
                                         | GOMP_MAP_FLAG_SPECIAL_0)
 #define GOMP_MAP_DEEP_COPY             (GOMP_MAP_FLAG_SPECIAL_4 \
                                         | GOMP_MAP_FLAG_SPECIAL_2)
+/* This value indicates the map was created implicitly according to
+   OpenMP rules.  */
+#define GOMP_MAP_IMPLICIT              (GOMP_MAP_FLAG_SPECIAL_3 \
+                                        | GOMP_MAP_FLAG_SPECIAL_4)
+/* Mask for entire set of special map kind bits.  */
+#define GOMP_MAP_FLAG_SPECIAL_BITS     (GOMP_MAP_FLAG_SPECIAL_0 \
+                                        | GOMP_MAP_FLAG_SPECIAL_1 \
+                                        | GOMP_MAP_FLAG_SPECIAL_2 \
+                                        | GOMP_MAP_FLAG_SPECIAL_3 \
+                                        | GOMP_MAP_FLAG_SPECIAL_4)
 /* Flag to force a specific behavior (or else, trigger a run-time error).  */
 #define GOMP_MAP_FLAG_FORCE            (1 << 7)
 
@@ -225,7 +235,12 @@ enum gomp_map_kind
   (GOMP_MAP_ALWAYS_TO_P (X) || ((X) == GOMP_MAP_ALWAYS_FROM))
 
 #define GOMP_MAP_NONCONTIG_ARRAY_P(X) \
-  ((X) & GOMP_MAP_NONCONTIG_ARRAY)
+  (((X) & GOMP_MAP_FLAG_SPECIAL_BITS) == GOMP_MAP_NONCONTIG_ARRAY      \
+   || (X) == GOMP_MAP_NONCONTIG_ARRAY_FORCE_PRESENT)
+
+#define GOMP_MAP_IMPLICIT_P(X) \
+  (((X) & GOMP_MAP_FLAG_SPECIAL_BITS) == GOMP_MAP_IMPLICIT)
+
 
 /* Asynchronous behavior.  Keep in sync with
    libgomp/{openacc.h,openacc.f90,openacc_lib.h}:acc_async_t.  */
index b605e4b8fe7b4a918306b89b38dc9b8bbdd39755..6a4a656624a1fc0bc3a475e9d9fd067432fa5e96 100644 (file)
@@ -1,3 +1,15 @@
+2021-05-05  Chung-Lin Tang  <cltang@codesourcery.com>
+
+       * target.c (gomp_map_vars_existing): Add 'bool implicit' parameter, add
+       implicit map handling to allow a "superset" existing map as valid case.
+       (get_kind): Adjust to filter out GOMP_MAP_IMPLICIT bits in return value.
+       (get_implicit): New function to extract implicit status.
+       (gomp_map_fields_existing): Adjust arguments in calls to
+       gomp_map_vars_existing, and add uses of get_implicit.
+       (gomp_map_vars_internal): Likewise.
+
+       * testsuite/libgomp.c-c++-common/target-implicit-map-1.c: New test.
+
 2021-04-30  Kwok Cheung Yeung  <kcy@codesourcery.com>
 
        Backport from mainline
index 2633ab1e43f70e1f89435c05eb87be20d4c05f38..7a8fa87bd85a6284a85843532a720e6532c18ebc 100644 (file)
@@ -510,7 +510,7 @@ static inline void
 gomp_map_vars_existing (struct gomp_device_descr *devicep,
                        struct goacc_asyncqueue *aq, splay_tree_key oldn,
                        splay_tree_key newn, struct target_var_desc *tgt_var,
-                       unsigned char kind, bool always_to_flag,
+                       unsigned char kind, bool always_to_flag, bool implicit,
                        struct gomp_coalesce_buf *cbuf,
                        htab_t *refcount_set)
 {
@@ -522,11 +522,22 @@ gomp_map_vars_existing (struct gomp_device_descr *devicep,
   tgt_var->always_copy_from = GOMP_MAP_ALWAYS_FROM_P (kind);
   tgt_var->is_attach = false;
   tgt_var->offset = newn->host_start - oldn->host_start;
-  tgt_var->length = newn->host_end - newn->host_start;
+
+  /* For implicit maps, old contained in new is valid.  */
+  bool implicit_subset = (implicit
+                         && newn->host_start <= oldn->host_start
+                         && oldn->host_end <= newn->host_end);
+  if (implicit_subset)
+    tgt_var->length = oldn->host_end - oldn->host_start;
+  else
+    tgt_var->length = newn->host_end - newn->host_start;
 
   if ((kind & GOMP_MAP_FLAG_FORCE)
-      || oldn->host_start > newn->host_start
-      || oldn->host_end < newn->host_end)
+      /* For implicit maps, old contained in new is valid.  */
+      || !(implicit_subset
+          /* Otherwise, new contained inside old is considered valid.  */
+          || (oldn->host_start <= newn->host_start
+              && newn->host_end <= oldn->host_end)))
     {
       gomp_mutex_unlock (&devicep->lock);
       gomp_fatal ("Trying to map into device [%p..%p) object when "
@@ -536,11 +547,17 @@ gomp_map_vars_existing (struct gomp_device_descr *devicep,
     }
 
   if (GOMP_MAP_ALWAYS_TO_P (kind) || always_to_flag)
-    gomp_copy_host2dev (devicep, aq,
-                       (void *) (oldn->tgt->tgt_start + oldn->tgt_offset
-                                 + newn->host_start - oldn->host_start),
-                       (void *) newn->host_start,
-                       newn->host_end - newn->host_start, false, cbuf);
+    {
+      /* Implicit + always should not happen. If this does occur, below
+        address/length adjustment is a TODO.  */
+      assert (!implicit_subset);
+
+      gomp_copy_host2dev (devicep, aq,
+                         (void *) (oldn->tgt->tgt_start + oldn->tgt_offset
+                                   + newn->host_start - oldn->host_start),
+                         (void *) newn->host_start,
+                         newn->host_end - newn->host_start, false, cbuf);
+    }
 
   gomp_increment_refcount (oldn, refcount_set);
 }
@@ -548,8 +565,24 @@ gomp_map_vars_existing (struct gomp_device_descr *devicep,
 static int
 get_kind (bool short_mapkind, void *kinds, int idx)
 {
-  return short_mapkind ? ((unsigned short *) kinds)[idx]
-                      : ((unsigned char *) kinds)[idx];
+  int val = (short_mapkind
+            ? ((unsigned short *) kinds)[idx]
+            : ((unsigned char *) kinds)[idx]);
+
+  if (GOMP_MAP_IMPLICIT_P (val))
+    val &= ~GOMP_MAP_IMPLICIT;
+  return val;
+}
+
+
+static bool
+get_implicit (bool short_mapkind, void *kinds, int idx)
+{
+  int val = (short_mapkind
+            ? ((unsigned short *) kinds)[idx]
+            : ((unsigned char *) kinds)[idx]);
+
+  return GOMP_MAP_IMPLICIT_P (val);
 }
 
 static void
@@ -612,6 +645,7 @@ gomp_map_fields_existing (struct target_mem_desc *tgt,
   struct splay_tree_s *mem_map = &devicep->mem_map;
   struct splay_tree_key_s cur_node;
   int kind;
+  bool implicit;
   const bool short_mapkind = true;
   const int typemask = short_mapkind ? 0xff : 0x7;
 
@@ -619,12 +653,14 @@ gomp_map_fields_existing (struct target_mem_desc *tgt,
   cur_node.host_end = cur_node.host_start + sizes[i];
   splay_tree_key n2 = splay_tree_lookup (mem_map, &cur_node);
   kind = get_kind (short_mapkind, kinds, i);
+  implicit = get_implicit (short_mapkind, kinds, i);
   if (n2
       && n2->tgt == n->tgt
       && n2->host_start - n->host_start == n2->tgt_offset - n->tgt_offset)
     {
       gomp_map_vars_existing (devicep, aq, n2, &cur_node, &tgt->list[i],
-                             kind & typemask, false, cbuf, refcount_set);
+                             kind & typemask, false, implicit, cbuf,
+                             refcount_set);
       return;
     }
   if (sizes[i] == 0)
@@ -640,7 +676,8 @@ gomp_map_fields_existing (struct target_mem_desc *tgt,
                 == n2->tgt_offset - n->tgt_offset)
            {
              gomp_map_vars_existing (devicep, aq, n2, &cur_node, &tgt->list[i],
-                                     kind & typemask, false, cbuf, refcount_set);
+                                     kind & typemask, false, implicit, cbuf,
+                                     refcount_set);
              return;
            }
        }
@@ -652,7 +689,8 @@ gomp_map_fields_existing (struct target_mem_desc *tgt,
          && n2->host_start - n->host_start == n2->tgt_offset - n->tgt_offset)
        {
          gomp_map_vars_existing (devicep, aq, n2, &cur_node, &tgt->list[i],
-                                 kind & typemask, false, cbuf, refcount_set);
+                                 kind & typemask, false, implicit, cbuf,
+                                 refcount_set);
          return;
        }
     }
@@ -898,6 +936,7 @@ gomp_map_vars_internal (struct gomp_device_descr *devicep,
   for (i = 0; i < mapnum; i++)
     {
       int kind = get_kind (short_mapkind, kinds, i);
+      bool implicit = get_implicit (short_mapkind, kinds, i);
       if (hostaddrs[i] == NULL
          || (kind & typemask) == GOMP_MAP_FIRSTPRIVATE_INT)
        {
@@ -1104,8 +1143,8 @@ gomp_map_vars_internal (struct gomp_device_descr *devicep,
                }
            }
          gomp_map_vars_existing (devicep, aq, n, &cur_node, &tgt->list[i],
-                                 kind & typemask, always_to_cnt > 0, NULL,
-                                 refcount_set);
+                                 kind & typemask, always_to_cnt > 0, implicit,
+                                 NULL, refcount_set);
          i += always_to_cnt;
        }
       else
@@ -1182,7 +1221,7 @@ gomp_map_vars_internal (struct gomp_device_descr *devicep,
                {
                  assert (n->refcount != REFCOUNT_LINK);
                  gomp_map_vars_existing (devicep, aq, n, &cur_node, row_desc,
-                                         kind & typemask, false,
+                                         kind & typemask, false, false,
                                          /* TODO: cbuf? */ NULL, refcount_set);
                }
              else
@@ -1312,6 +1351,7 @@ gomp_map_vars_internal (struct gomp_device_descr *devicep,
        else if (tgt->list[i].key == NULL)
          {
            int kind = get_kind (short_mapkind, kinds, i);
+           bool implicit = get_implicit (short_mapkind, kinds, i);
            if (hostaddrs[i] == NULL)
              continue;
            switch (kind & typemask)
@@ -1483,7 +1523,7 @@ gomp_map_vars_internal (struct gomp_device_descr *devicep,
            splay_tree_key n = splay_tree_lookup (mem_map, k);
            if (n && n->refcount != REFCOUNT_LINK)
              gomp_map_vars_existing (devicep, aq, n, k, &tgt->list[i],
-                                     kind & typemask, false, cbufp,
+                                     kind & typemask, false, implicit, cbufp,
                                      refcount_set);
            else
              {
@@ -1702,7 +1742,7 @@ gomp_map_vars_internal (struct gomp_device_descr *devicep,
                    {
                      assert (k->refcount != REFCOUNT_LINK);
                      gomp_map_vars_existing (devicep, aq, k, &cur_node, row_desc,
-                                             kind & typemask, false,
+                                             kind & typemask, false, false,
                                              cbufp, refcount_set);
                    }
                  else
diff --git a/libgomp/testsuite/libgomp.c-c++-common/target-implicit-map-1.c b/libgomp/testsuite/libgomp.c-c++-common/target-implicit-map-1.c
new file mode 100644 (file)
index 0000000..f2e7293
--- /dev/null
@@ -0,0 +1,31 @@
+#ifdef __cplusplus
+extern "C"
+#else
+extern
+#endif
+void abort (void);
+
+int
+main (void)
+{
+  #define N 5
+  int array[N][N];
+
+  for (int i = 0; i < N; i++)
+    {
+      #pragma omp target enter data map(alloc: array[i:1][0:N])
+
+      #pragma omp target
+      for (int j = 0; j < N; j++)
+       array[i][j] = i + j;
+
+      #pragma omp target exit data map(from: array[i:1][0:N])
+    }
+
+  for (int i = 0; i < N; i++)
+    for (int j = 0; j < N; j++)
+      if (array[i][j] != i + j)
+       abort ();
+
+  return 0;
+}