GPU: Use warp barriers in ZS decoder.

[fweig]

No description provided.

[github-actions]

REQUEST FOR PRODUCTION RELEASES:
To request your PR to be included in production software, please add the corresponding labels called "async-" to your PR. Add the labels directly (if you have the permissions) or add a comment of the form (note that labels are separated by a ",")

+async-label <label1>, <label2>, !<label3> ...

This will add <label1> and <label2> and removes <label3>.

The following labels are available
async-2023-pbpb-apass4
async-2023-pp-apass4
async-2024-pp-apass1
async-2022-pp-apass7
async-2024-pp-cpass0
async-2024-PbPb-apass1
async-2024-ppRef-apass1
async-2024-PbPb-apass2
async-2023-PbPb-apass5

[alibuild]

Error while checking build/O2/fullCI_slc9 for 97b3f4a at 2025-07-08 15:38:

## sw/BUILD/O2-latest/log
/sw/SOURCES/O2/14489-slc9_x86-64/0/GPU/GPUTracking/TPCClusterFinder/CfUtils.h:61:24: error: use of undeclared identifier 'warp_scan_inclusive_add_FUNC'; did you mean 'sub_group_scan_inclusive_add_FUNC'?
/sw/SOURCES/O2/14489-slc9_x86-64/0/GPU/GPUTracking/TPCClusterFinder/GPUTPCCFDecodeZS.cxx:370:24: error: use of undeclared identifier 'warp_scan_inclusive_add_FUNC'; did you mean 'sub_group_scan_inclusive_add_FUNC'?
ninja: build stopped: subcommand failed.


## sw/BUILD/ef4e2e5e373bebd27a13dbc01d752ba8f3607e91-latest/log
/sw/SOURCES/O2/14489-slc9_x86-64/0/GPU/GPUTracking/TPCClusterFinder/CfUtils.h:61:24: error: use of undeclared identifier 'warp_scan_inclusive_add_FUNC'; did you mean 'sub_group_scan_inclusive_add_FUNC'?
/sw/SOURCES/O2/14489-slc9_x86-64/0/GPU/GPUTracking/TPCClusterFinder/GPUTPCCFDecodeZS.cxx:370:24: error: use of undeclared identifier 'warp_scan_inclusive_add_FUNC'; did you mean 'sub_group_scan_inclusive_add_FUNC'?
ninja: build stopped: subcommand failed.

Full log here.

[alibuild]

Error while checking build/O2/fullCI_slc9 for 3a7cefa at 2025-07-11 04:13:

## sw/BUILD/97e1bac217aaf0d7fd7ba888738a0f43d56e15ce-latest/log
/sw/SOURCES/O2/14489-slc9_x86-64/0/GPU/GPUTracking/display/backend/GPUDisplayBackendOpenGL.cxx:333:57: error: use nullptr [modernize-use-nullptr]
/sw/SOURCES/O2/14489-slc9_x86-64/0/GPU/GPUTracking/display/backend/GPUDisplayBackendOpenGL.cxx:333:60: error: use nullptr [modernize-use-nullptr]
/sw/SOURCES/O2/14489-slc9_x86-64/0/GPU/GPUTracking/display/backend/GPUDisplayBackendOpenGL.cxx:335:59: error: use nullptr [modernize-use-nullptr]
/sw/SOURCES/O2/14489-slc9_x86-64/0/GPU/GPUTracking/display/backend/GPUDisplayBackendOpenGL.cxx:335:62: error: use nullptr [modernize-use-nullptr]


## sw/BUILD/97e1bac217aaf0d7fd7ba888738a0f43d56e15ce-latest/log
--
========== List of errors found ==========
++ GRERR=0
++ grep -v clang-diagnostic-error error-log.txt
++ grep ' error:'
grep: error-log.txt: binary file matches
/sw/SOURCES/O2/14489-slc9_x86-64/0/GPU/GPUTracking/display/backend/GPUDisplayBackendOpenGL.cxx:333:57: error: use nullptr [modernize-use-nullptr]
/sw/SOURCES/O2/14489-slc9_x86-64/0/GPU/GPUTracking/display/backend/GPUDisplayBackendOpenGL.cxx:333:60: error: use nullptr [modernize-use-nullptr]
/sw/SOURCES/O2/14489-slc9_x86-64/0/GPU/GPUTracking/display/backend/GPUDisplayBackendOpenGL.cxx:335:59: error: use nullptr [modernize-use-nullptr]
/sw/SOURCES/O2/14489-slc9_x86-64/0/GPU/GPUTracking/display/backend/GPUDisplayBackendOpenGL.cxx:335:62: error: use nullptr [modernize-use-nullptr]
++ [[ 0 == 0 ]]
++ exit 1
--

Full log here.