[libclc] bce14c6 - [libclc] Fix out-of-bound value for workitem functions according to OpenCL spec (#153784)

[via cfe-commits]

Author: Wenju He
Date: 2025-08-18T06:51:01+08:00
New Revision: bce14c69db0ba2b8c54b250a0bd309879fb5bc78

URL: https://github.com/llvm/llvm-project/commit/bce14c69db0ba2b8c54b250a0bd309879fb5bc78
DIFF: https://github.com/llvm/llvm-project/commit/bce14c69db0ba2b8c54b250a0bd309879fb5bc78.diff

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

Added: 
    

Modified: 
    libclc/clc/lib/amdgcn/workitem/clc_get_group_id.cl
    libclc/clc/lib/amdgcn/workitem/clc_get_local_id.cl
    libclc/clc/lib/ptx-nvidiacl/workitem/clc_get_local_size.cl
    libclc/clc/lib/ptx-nvidiacl/workitem/clc_get_num_groups.cl

Removed: 
    


################################################################################
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;
   }
 }