Re: [OpenACC 0/7] host_data construct

[Thomas Schwinge <thomas@codesourcery.com>]

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Hi!

On Wed, 2 Dec 2015 16:58:45 +0100, I wrote:
> On Mon, 30 Nov 2015 19:30:34 +0000, Julian Brown <julian@codesourcery.com> wrote:
> > --- a/libgomp/oacc-parallel.c
> > +++ b/libgomp/oacc-parallel.c
> 
> > +void
> > +GOACC_host_data (int device, size_t mapnum,
> > +		 void **hostaddrs, size_t *sizes, unsigned short *kinds)
> > +{
> > +[...]
> > +}
> 
> Isn't that identical to GOACC_data_start?  Can we thus get rid of it?

Yes, we can.  As GOACC_host_data has not been part of GCC 5's libgomp
ABI, it's OK to just remove it; committed "as obvious" in r233074:

commit 2bf3f448431be10baa9755df5faeed6b2f6508f8
Author: tschwinge <tschwinge@138bc75d-0d04-0410-961f-82ee72b054a4>
Date:   Tue Feb 2 13:53:55 2016 +0000

    Merge BUILT_IN_GOACC_HOST_DATA into BUILT_IN_GOACC_DATA_START
    
    	gcc/
    	* omp-builtins.def (BUILT_IN_GOACC_HOST_DATA): Remove.
    	* omp-low.c (expand_omp_target): Use BUILT_IN_GOACC_DATA_START
    	instead.
    	libgomp/
    	* libgomp.map (GOACC_2.0): Remove GOACC_host_data.
    	* oacc-parallel.c (GOACC_host_data): Remove function definition.
    
    git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@233074 138bc75d-0d04-0410-961f-82ee72b054a4
---
 gcc/ChangeLog           |  6 ++++++
 gcc/omp-builtins.def    |  2 --
 gcc/omp-low.c           |  5 +----
 libgomp/ChangeLog       |  3 +++
 libgomp/libgomp.map     |  1 -
 libgomp/oacc-parallel.c | 40 ----------------------------------------
 6 files changed, 10 insertions(+), 47 deletions(-)

diff --git gcc/ChangeLog gcc/ChangeLog
index 05741331..9a2cec8 100644
--- gcc/ChangeLog
+++ gcc/ChangeLog
@@ -1,3 +1,9 @@
+2016-02-02  Thomas Schwinge  <thomas@codesourcery.com>
+
+	* omp-builtins.def (BUILT_IN_GOACC_HOST_DATA): Remove.
+	* omp-low.c (expand_omp_target): Use BUILT_IN_GOACC_DATA_START
+	instead.
+
 2016-02-02  Richard Biener  <rguenther@suse.de>
 
 	PR tree-optimization/69606
diff --git gcc/omp-builtins.def gcc/omp-builtins.def
index 60199b0..ea012df 100644
--- gcc/omp-builtins.def
+++ gcc/omp-builtins.def
@@ -47,8 +47,6 @@ DEF_GOACC_BUILTIN (BUILT_IN_GOACC_UPDATE, "GOACC_update",
 DEF_GOACC_BUILTIN (BUILT_IN_GOACC_WAIT, "GOACC_wait",
 		   BT_FN_VOID_INT_INT_VAR,
 		   ATTR_NOTHROW_LIST)
-DEF_GOACC_BUILTIN (BUILT_IN_GOACC_HOST_DATA, "GOACC_host_data",
-		   BT_FN_VOID_INT_SIZE_PTR_PTR_PTR, ATTR_NOTHROW_LIST)
 
 DEF_GOACC_BUILTIN_COMPILER (BUILT_IN_ACC_ON_DEVICE, "acc_on_device",
 			    BT_FN_INT_INT, ATTR_CONST_NOTHROW_LEAF_LIST)
diff --git gcc/omp-low.c gcc/omp-low.c
index 0b70274..d41688b 100644
--- gcc/omp-low.c
+++ gcc/omp-low.c
@@ -13186,6 +13186,7 @@ expand_omp_target (struct omp_region *region)
       start_ix = BUILT_IN_GOACC_PARALLEL;
       break;
     case GF_OMP_TARGET_KIND_OACC_DATA:
+    case GF_OMP_TARGET_KIND_OACC_HOST_DATA:
       start_ix = BUILT_IN_GOACC_DATA_START;
       break;
     case GF_OMP_TARGET_KIND_OACC_UPDATE:
@@ -13197,9 +13198,6 @@ expand_omp_target (struct omp_region *region)
     case GF_OMP_TARGET_KIND_OACC_DECLARE:
       start_ix = BUILT_IN_GOACC_DECLARE;
       break;
-    case GF_OMP_TARGET_KIND_OACC_HOST_DATA:
-      start_ix = BUILT_IN_GOACC_HOST_DATA;
-      break;
     default:
       gcc_unreachable ();
     }
@@ -13324,7 +13322,6 @@ expand_omp_target (struct omp_region *region)
     case BUILT_IN_GOACC_DATA_START:
     case BUILT_IN_GOACC_DECLARE:
     case BUILT_IN_GOMP_TARGET_DATA:
-    case BUILT_IN_GOACC_HOST_DATA:
       break;
     case BUILT_IN_GOMP_TARGET:
     case BUILT_IN_GOMP_TARGET_UPDATE:
diff --git libgomp/ChangeLog libgomp/ChangeLog
index 6c9bf6a..250240d 100644
--- libgomp/ChangeLog
+++ libgomp/ChangeLog
@@ -1,5 +1,8 @@
 2016-02-02  Thomas Schwinge  <thomas@codesourcery.com>
 
+	* libgomp.map (GOACC_2.0): Remove GOACC_host_data.
+	* oacc-parallel.c (GOACC_host_data): Remove function definition.
+
 	* testsuite/lib/libgomp.exp: Skip hsa offloading for OpenACC test
 	cases.
 
diff --git libgomp/libgomp.map libgomp/libgomp.map
index ea9344d..4d42c42 100644
--- libgomp/libgomp.map
+++ libgomp/libgomp.map
@@ -394,7 +394,6 @@ GOACC_2.0.1 {
   global:
 	GOACC_declare;
 	GOACC_parallel_keyed;
-	GOACC_host_data;
 } GOACC_2.0;
 
 GOMP_PLUGIN_1.0 {
diff --git libgomp/oacc-parallel.c libgomp/oacc-parallel.c
index f22ba41..bc24651 100644
--- libgomp/oacc-parallel.c
+++ libgomp/oacc-parallel.c
@@ -490,46 +490,6 @@ GOACC_wait (int async, int num_waits, ...)
     goacc_thread ()->dev->openacc.async_wait_all_async_func (acc_async_noval);
 }
 
-void
-GOACC_host_data (int device, size_t mapnum,
-		 void **hostaddrs, size_t *sizes, unsigned short *kinds)
-{
-  bool host_fallback = device == GOMP_DEVICE_HOST_FALLBACK;
-  struct target_mem_desc *tgt;
-
-#ifdef HAVE_INTTYPES_H
-  gomp_debug (0, "%s: mapnum=%"PRIu64", hostaddrs=%p, size=%p, kinds=%p\n",
-	      __FUNCTION__, (uint64_t) mapnum, hostaddrs, sizes, kinds);
-#else
-  gomp_debug (0, "%s: mapnum=%lu, hostaddrs=%p, sizes=%p, kinds=%p\n",
-	      __FUNCTION__, (unsigned long) mapnum, hostaddrs, sizes, kinds);
-#endif
-
-  goacc_lazy_initialize ();
-
-  struct goacc_thread *thr = goacc_thread ();
-  struct gomp_device_descr *acc_dev = thr->dev;
-
-  /* Host fallback or 'do nothing'.  */
-  if ((acc_dev->capabilities & GOMP_OFFLOAD_CAP_SHARED_MEM)
-      || host_fallback)
-    {
-      tgt = gomp_map_vars (NULL, 0, NULL, NULL, NULL, NULL, true,
-			   GOMP_MAP_VARS_OPENACC);
-      tgt->prev = thr->mapped_data;
-      thr->mapped_data = tgt;
-
-      return;
-    }
-
-  gomp_debug (0, "  %s: prepare mappings\n", __FUNCTION__);
-  tgt = gomp_map_vars (acc_dev, mapnum, hostaddrs, NULL, sizes, kinds, true,
-		       GOMP_MAP_VARS_OPENACC);
-  gomp_debug (0, "  %s: mappings prepared\n", __FUNCTION__);
-  tgt->prev = thr->mapped_data;
-  thr->mapped_data = tgt;
-}
-
 int
 GOACC_get_num_threads (void)
 {


Grüße
 Thomas

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