r328219 - [OpenMP][Clang] Add call to global data sharing stack initialization on the workers side

[Gheorghe-Teodor Bercea via cfe-commits]

Author: gbercea
Date: Thu Mar 22 10:33:27 2018
New Revision: 328219

URL: http://llvm.org/viewvc/llvm-project?rev=328219&view=rev
Log:
[OpenMP][Clang] Add call to global data sharing stack initialization on the workers side

Summary: The workers also need to initialize the global stack. The call to the initialization function needs to happen after the kernel_init() function is called by the master. This ensures that the per-team data structures of the runtime have been initialized.

Reviewers: ABataev, grokos, carlo.bertolli, caomhin

Reviewed By: ABataev

Subscribers: jholewinski, guansong, cfe-commits

Differential Revision: https://reviews.llvm.org/D44749

Modified:
    cfe/trunk/lib/CodeGen/CGOpenMPRuntimeNVPTX.cpp
    cfe/trunk/test/OpenMP/nvptx_data_sharing.cpp

Modified: cfe/trunk/lib/CodeGen/CGOpenMPRuntimeNVPTX.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGOpenMPRuntimeNVPTX.cpp?rev=328219&r1=328218&r2=328219&view=diff
==============================================================================
--- cfe/trunk/lib/CodeGen/CGOpenMPRuntimeNVPTX.cpp (original)
+++ cfe/trunk/lib/CodeGen/CGOpenMPRuntimeNVPTX.cpp Thu Mar 22 10:33:27 2018
@@ -801,6 +801,11 @@ void CGOpenMPRuntimeNVPTX::emitWorkerLoo
   // Wait for parallel work
   syncCTAThreads(CGF);
 
+  // For data sharing, we need to initialize the stack for workers.
+  CGF.EmitRuntimeCall(
+      createNVPTXRuntimeFunction(
+          OMPRTL_NVPTX__kmpc_data_sharing_init_stack));
+
   Address WorkFn =
       CGF.CreateDefaultAlignTempAlloca(CGF.Int8PtrTy, /*Name=*/"work_fn");
   Address ExecStatus =

Modified: cfe/trunk/test/OpenMP/nvptx_data_sharing.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/OpenMP/nvptx_data_sharing.cpp?rev=328219&r1=328218&r2=328219&view=diff
==============================================================================
--- cfe/trunk/test/OpenMP/nvptx_data_sharing.cpp (original)
+++ cfe/trunk/test/OpenMP/nvptx_data_sharing.cpp Thu Mar 22 10:33:27 2018
@@ -27,6 +27,11 @@ void test_ds(){
   }
 }
 
+/// ========= In the worker function ========= ///
+// CK1: {{.*}}define internal void @__omp_offloading{{.*}}test_ds{{.*}}_worker()
+// CK1: call void @llvm.nvvm.barrier0()
+// CK1: call void @__kmpc_data_sharing_init_stack
+
 /// ========= In the kernel function ========= ///
 
 // CK1: {{.*}}define void @__omp_offloading{{.*}}test_ds{{.*}}()