commit 9adfbf0f84d7a20d63ba00fa20e4d4cfdd3f4574
author Shilei Tian <tianshilei1992@gmail.com> Wed Jan 20 12:01:51 2021 -0500
committer Copybara-Service <copybara-worker@google.com> Thu Jan 21 18:05:20 2021 -0800
tree d8b975b1d4656ffbbc95a3e772e7ead92494448d
parent d923a84bbb1531028ae7ab4e3debe410e63c08e7

[OpenMP][NVPTX] Replaced CUDA builtin vars with LLVM intrinsics

Replaced CUDA builtin vars with LLVM intrinsics such that we don't need
definitions of those intrinsics.

Reviewed By: JonChesterfield

Differential Revision: https://reviews.llvm.org/D95013

GitOrigin-RevId: fd70f70d1e02752f411fcf923fddda31cce376ae

libomptarget/deviceRTLs/nvptx/src/target_impl.cu

diff --git a/libomptarget/deviceRTLs/nvptx/src/target_impl.cu b/libomptarget/deviceRTLs/nvptx/src/target_impl.cu
index 8052b92..b5ef549 100644
--- a/libomptarget/deviceRTLs/nvptx/src/target_impl.cu
+++ b/libomptarget/deviceRTLs/nvptx/src/target_impl.cu
@@ -115,10 +115,12 @@
 DEVICE void __kmpc_impl_threadfence_system() { __threadfence_system(); }
 
 // Calls to the NVPTX layer (assuming 1D layout)
-DEVICE int GetThreadIdInBlock() { return threadIdx.x; }
-DEVICE int GetBlockIdInKernel() { return blockIdx.x; }
-DEVICE int GetNumberOfBlocksInKernel() { return gridDim.x; }
-DEVICE int GetNumberOfThreadsInBlock() { return blockDim.x; }
+DEVICE int GetThreadIdInBlock() { return __nvvm_read_ptx_sreg_tid_x(); }
+DEVICE int GetBlockIdInKernel() { return __nvvm_read_ptx_sreg_ctaid_x(); }
+DEVICE int GetNumberOfBlocksInKernel() {
+  return __nvvm_read_ptx_sreg_nctaid_x();
+}
+DEVICE int GetNumberOfThreadsInBlock() { return __nvvm_read_ptx_sreg_ntid_x(); }
 DEVICE unsigned GetWarpId() { return GetThreadIdInBlock() / WARPSIZE; }
 DEVICE unsigned GetLaneId() { return GetThreadIdInBlock() & (WARPSIZE - 1); }