[gcc/devel/omp/gcc-11] nvptx: remove erroneous stack deletion

[gcc/devel/omp/gcc-11] nvptx: remove erroneous stack deletion

[Kwok Yeung]

https://gcc.gnu.org/g:d71d7ccaa67fc0000ac5ff33ba48ddee9b48284b

commit d71d7ccaa67fc0000ac5ff33ba48ddee9b48284b
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/plugin/plugin-nvptx.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/libgomp/plugin/plugin-nvptx.c b/libgomp/plugin/plugin-nvptx.c
index 23573416a12..96f2c13a191 100644
--- a/libgomp/plugin/plugin-nvptx.c
+++ b/libgomp/plugin/plugin-nvptx.c
@@ -1412,8 +1412,6 @@ 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;