[gcc/devel/omp/gcc-12] nvptx: remove erroneous stack deletion

[gcc/devel/omp/gcc-12] nvptx: remove erroneous stack deletion

[Kwok Yeung]

https://gcc.gnu.org/g:86a04ff9b51ccf512ccb7578497100888f5f9925

commit 86a04ff9b51ccf512ccb7578497100888f5f9925
Author: Andrew Stubbs <ams@codesourcery.com>
Date:   Tue Feb 23 21:35:08 2021 +0000

    nvptx: remove erroneous stack deletion
    
    The stacks are not supposed to be deleted every time memory is allocated, only
    when there is insufficient memory.  The unconditional call here seems to be in
    error, and is causing a costly reallocation of the stacks before every launch.
    
    libgomp/
    
            * plugin/plugin-nvptx.c (GOMP_OFFLOAD_alloc): Remove early call to
            nvptx_stacks_free.

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

diff --git a/libgomp/ChangeLog.omp b/libgomp/ChangeLog.omp
index e5a076be557..4bf75fd6861 100644
--- a/libgomp/ChangeLog.omp
+++ b/libgomp/ChangeLog.omp
@@ -1,3 +1,8 @@
+2021-02-23  Andrew Stubbs  <ams@codesourcery.com>
+
+	* plugin/plugin-nvptx.c (GOMP_OFFLOAD_alloc): Remove early call to
+	nvptx_stacks_free.
+
 2021-02-02  Chung-Lin Tang  <cltang@codesourcery.com>
 
 	* libgomp-plugin.h (GOMP_OFFLOAD_supported_features): New declaration.
diff --git a/libgomp/plugin/plugin-nvptx.c b/libgomp/plugin/plugin-nvptx.c
index 9c6b5d395a2..eeadc906d03 100644
--- a/libgomp/plugin/plugin-nvptx.c
+++ b/libgomp/plugin/plugin-nvptx.c
@@ -1428,8 +1428,6 @@ GOMP_OFFLOAD_alloc (int ord, size_t size)
   ptx_dev->free_blocks = NULL;
   pthread_mutex_unlock (&ptx_dev->free_blocks_lock);
 
-  nvptx_stacks_free (ptx_dev, false);
-
   while (blocks)
     {
       tmp = blocks->next;