[libclc] [libclc] Fix out-of-bound value for workitem functions according to OpenCL spec (PR #153784)

[Wenju He via cfe-commits]

https://github.com/wenju-he created https://github.com/llvm/llvm-project/pull/153784

None

>From c51ac2969099be4831c3d296fffec9e6f4fce780 Mon Sep 17 00:00:00 2001
From: Wenju He <wenju.he at intel.com>
Date: Fri, 15 Aug 2025 12:37:00 +0200
Subject: [PATCH] [libclc] Fix out-of-bound value for workitem functions
 according to OpenCL spec

---
 libclc/clc/lib/amdgcn/workitem/clc_get_group_id.cl         | 2 +-
 libclc/clc/lib/amdgcn/workitem/clc_get_local_id.cl         | 2 +-
 libclc/clc/lib/ptx-nvidiacl/workitem/clc_get_local_size.cl | 2 +-
 libclc/clc/lib/ptx-nvidiacl/workitem/clc_get_num_groups.cl | 2 +-
 4 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/libclc/clc/lib/amdgcn/workitem/clc_get_group_id.cl b/libclc/clc/lib/amdgcn/workitem/clc_get_group_id.cl
index aea927c3460b4..4dab7905ba301 100644
--- a/libclc/clc/lib/amdgcn/workitem/clc_get_group_id.cl
+++ b/libclc/clc/lib/amdgcn/workitem/clc_get_group_id.cl
@@ -17,6 +17,6 @@ _CLC_DEF _CLC_OVERLOAD size_t __clc_get_group_id(uint dim) {
   case 2:
     return __builtin_amdgcn_workgroup_id_z();
   default:
-    return 1;
+    return 0;
   }
 }
diff --git a/libclc/clc/lib/amdgcn/workitem/clc_get_local_id.cl b/libclc/clc/lib/amdgcn/workitem/clc_get_local_id.cl
index b7b7a43e735d3..8d1d16d4762fd 100644
--- a/libclc/clc/lib/amdgcn/workitem/clc_get_local_id.cl
+++ b/libclc/clc/lib/amdgcn/workitem/clc_get_local_id.cl
@@ -17,6 +17,6 @@ _CLC_DEF _CLC_OVERLOAD size_t __clc_get_local_id(uint dim) {
   case 2:
     return __builtin_amdgcn_workitem_id_z();
   default:
-    return 1;
+    return 0;
   }
 }
diff --git a/libclc/clc/lib/ptx-nvidiacl/workitem/clc_get_local_size.cl b/libclc/clc/lib/ptx-nvidiacl/workitem/clc_get_local_size.cl
index 4525c85f1e382..2d547d3af249e 100644
--- a/libclc/clc/lib/ptx-nvidiacl/workitem/clc_get_local_size.cl
+++ b/libclc/clc/lib/ptx-nvidiacl/workitem/clc_get_local_size.cl
@@ -17,6 +17,6 @@ _CLC_OVERLOAD _CLC_DEF size_t __clc_get_local_size(uint dim) {
   case 2:
     return __nvvm_read_ptx_sreg_ntid_z();
   default:
-    return 0;
+    return 1;
   }
 }
diff --git a/libclc/clc/lib/ptx-nvidiacl/workitem/clc_get_num_groups.cl b/libclc/clc/lib/ptx-nvidiacl/workitem/clc_get_num_groups.cl
index 495864751ef68..87151ea4be625 100644
--- a/libclc/clc/lib/ptx-nvidiacl/workitem/clc_get_num_groups.cl
+++ b/libclc/clc/lib/ptx-nvidiacl/workitem/clc_get_num_groups.cl
@@ -17,6 +17,6 @@ _CLC_OVERLOAD _CLC_DEF size_t __clc_get_num_groups(uint dim) {
   case 2:
     return __nvvm_read_ptx_sreg_nctaid_z();
   default:
-    return 0;
+    return 1;
   }
 }