[Openmp-commits] [openmp] [OpenMP] Remove declaration and usage of __AMDGCN_WAVEFRONT_SIZE (PR #143761)

[Shilei Tian via Openmp-commits]

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@@ -9,13 +9,21 @@
 #ifndef __OMPX_H
 #define __OMPX_H
 
-#ifdef __AMDGCN_WAVEFRONT_SIZE
-#define __WARP_SIZE __AMDGCN_WAVEFRONT_SIZE
-#else
-#define __WARP_SIZE 32
+#if (defined(__NVPTX__) || defined(__AMDGPU__))
+#include <gpuintrin.h>
+#define __OMPX_TARGET_IS_GPU
 #endif
 
 typedef unsigned long uint64_t;
+typedef unsigned int uint32_t;
+
+static inline uint32_t __warpSize(void) {
+  #ifdef __OMPX_TARGET_IS_GPU
+    return __gpu_num_lanes();
+  #else
+    __builtin_trap();
+  #endif
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shiltian wrote:

I believe if you use clang-format on this file, the macro would be pushed all the way to the beginning of the file.

https://github.com/llvm/llvm-project/pull/143761