[libclc] b57e63b - libclc: Stop using asm declarations for r600 on amdgcn for get_global_size (#128692)

[via cfe-commits]

Author: Matt Arsenault
Date: 2025-02-25T18:23:04+07:00
New Revision: b57e63b07a7b70ebfb5f794648e2102b7c1bd3a3

URL: https://github.com/llvm/llvm-project/commit/b57e63b07a7b70ebfb5f794648e2102b7c1bd3a3
DIFF: https://github.com/llvm/llvm-project/commit/b57e63b07a7b70ebfb5f794648e2102b7c1bd3a3.diff

LOG: libclc: Stop using asm declarations for r600 on amdgcn for get_global_size (#128692)

Comparing the case where each dimension is used alone, the only codegen
difference is a missed addressing mode fold for the constant offset in the old
version due to an ancient bug.

Added: 
    

Modified: 
    libclc/amdgcn/lib/workitem/get_global_size.cl

Removed: 
    


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diff  --git a/libclc/amdgcn/lib/workitem/get_global_size.cl b/libclc/amdgcn/lib/workitem/get_global_size.cl
index 2f28ca6066654..0fec7e24966fd 100644
--- a/libclc/amdgcn/lib/workitem/get_global_size.cl
+++ b/libclc/amdgcn/lib/workitem/get_global_size.cl
@@ -1,17 +1,13 @@
 #include <clc/clc.h>
 
-uint __clc_amdgcn_get_global_size_x(void) __asm("llvm.r600.read.global.size.x");
-uint __clc_amdgcn_get_global_size_y(void) __asm("llvm.r600.read.global.size.y");
-uint __clc_amdgcn_get_global_size_z(void) __asm("llvm.r600.read.global.size.z");
-
 _CLC_DEF _CLC_OVERLOAD size_t get_global_size(uint dim) {
   switch (dim) {
   case 0:
-    return __clc_amdgcn_get_global_size_x();
+    return __builtin_amdgcn_grid_size_x();
   case 1:
-    return __clc_amdgcn_get_global_size_y();
+    return __builtin_amdgcn_grid_size_y();
   case 2:
-    return __clc_amdgcn_get_global_size_z();
+    return __builtin_amdgcn_grid_size_z();
   default:
     return 1;
   }