[gcc/devel/omp/gcc-12] libgomp, nvptx: report USM supported

[gcc/devel/omp/gcc-12] libgomp, nvptx: report USM supported

[Kwok Yeung]

https://gcc.gnu.org/g:f3fd38e31fafdc7f6b6a721b53bdc595c4ec1e09

commit f3fd38e31fafdc7f6b6a721b53bdc595c4ec1e09
Author: Andrew Stubbs <ams@codesourcery.com>
Date:   Tue Mar 29 13:48:04 2022 +0100

    libgomp, nvptx: report USM supported
    
    libgomp/ChangeLog:
    
            * plugin/plugin-nvptx.c (GOMP_OFFLOAD_supported_features): Allow
            GOMP_REQUIRES_UNIFIED_ADDRESS and GOMP_REQUIRES_UNIFIED_SHARED_MEMORY.

Diff:
---
 libgomp/ChangeLog.omp         | 5 +++++
 libgomp/plugin/plugin-nvptx.c | 5 ++++-
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/libgomp/ChangeLog.omp b/libgomp/ChangeLog.omp
index 2b941521527..3372116bb4b 100644
--- a/libgomp/ChangeLog.omp
+++ b/libgomp/ChangeLog.omp
@@ -1,3 +1,8 @@
+2022-03-29  Andrew Stubbs  <ams@codesourcery.com>
+
+	* plugin/plugin-nvptx.c (GOMP_OFFLOAD_supported_features): Allow
+	GOMP_REQUIRES_UNIFIED_ADDRESS and GOMP_REQUIRES_UNIFIED_SHARED_MEMORY.
+
 2022-03-11  Andrew Stubbs <ams@codesourcery.com>
 
 	Backport of the patch posted at
diff --git a/libgomp/plugin/plugin-nvptx.c b/libgomp/plugin/plugin-nvptx.c
index 43336efacae..a71f3d1d605 100644
--- a/libgomp/plugin/plugin-nvptx.c
+++ b/libgomp/plugin/plugin-nvptx.c
@@ -1264,11 +1264,14 @@ GOMP_OFFLOAD_fini_device (int n)
   return true;
 }
 
-/* Indicate which GOMP_REQUIRES_* features are supported, currently none.  */
+/* Indicate which GOMP_REQUIRES_* features are supported.  */
 
 bool
 GOMP_OFFLOAD_supported_features (unsigned int *mask)
 {
+  *mask &= ~(GOMP_REQUIRES_UNIFIED_ADDRESS
+             | GOMP_REQUIRES_UNIFIED_SHARED_MEMORY);
+
   return (*mask == 0);
 }