[OpenMP] Adjust arguments of nvptx runtime functions

In the future the compiler will analyze whether the OpenMP
runtime needs to be (fully) initialized and avoid that overhead
if possible. The functions already take an argument to transfer
that information to the runtime, so pass in the default value 1.
(This is needed for binary compatibility with libomptarget-nvptx
currently being upstreamed.)

Differential Revision: https://reviews.llvm.org/D40354

llvm-svn: 318836

diff --git a/clang/lib/CodeGen/CGOpenMPRuntimeNVPTX.cpp b/clang/lib/CodeGen/CGOpenMPRuntimeNVPTX.cpp
index 0b8d79e..c8767bd 100644 (file)
--- a/clang/lib/CodeGen/CGOpenMPRuntimeNVPTX.cpp
+++ b/clang/lib/CodeGen/CGOpenMPRuntimeNVPTX.cpp
@@ -22,19 +22,21 @@ using namespace CodeGen;
 
 namespace {
 enum OpenMPRTLFunctionNVPTX {
-  /// \brief Call to void __kmpc_kernel_init(kmp_int32 thread_limit);
+  /// \brief Call to void __kmpc_kernel_init(kmp_int32 thread_limit,
+  /// int16_t RequiresOMPRuntime);
   OMPRTL_NVPTX__kmpc_kernel_init,
-  /// \brief Call to void __kmpc_kernel_deinit();
+  /// \brief Call to void __kmpc_kernel_deinit(int16_t IsOMPRuntimeInitialized);
   OMPRTL_NVPTX__kmpc_kernel_deinit,
   /// \brief Call to void __kmpc_spmd_kernel_init(kmp_int32 thread_limit,
-  /// short RequiresOMPRuntime, short RequiresDataSharing);
+  /// int16_t RequiresOMPRuntime, int16_t RequiresDataSharing);
   OMPRTL_NVPTX__kmpc_spmd_kernel_init,
   /// \brief Call to void __kmpc_spmd_kernel_deinit();
   OMPRTL_NVPTX__kmpc_spmd_kernel_deinit,
   /// \brief Call to void __kmpc_kernel_prepare_parallel(void
-  /// *outlined_function);
+  /// *outlined_function, void ***args, kmp_int32 nArgs);
   OMPRTL_NVPTX__kmpc_kernel_prepare_parallel,
-  /// \brief Call to bool __kmpc_kernel_parallel(void **outlined_function);
+  /// \brief Call to bool __kmpc_kernel_parallel(void **outlined_function, void
+  /// ***args);
   OMPRTL_NVPTX__kmpc_kernel_parallel,
   /// \brief Call to void __kmpc_kernel_end_parallel();
   OMPRTL_NVPTX__kmpc_kernel_end_parallel,
@@ -355,7 +357,9 @@ void CGOpenMPRuntimeNVPTX::emitGenericEntryHeader(CodeGenFunction &CGF,
   CGF.EmitBlock(MasterBB);
   // First action in sequential region:
   // Initialize the state of the OpenMP runtime library on the GPU.
-  llvm::Value *Args[] = {getThreadLimit(CGF)};
+  // TODO: Optimize runtime initialization and pass in correct value.
+  llvm::Value *Args[] = {getThreadLimit(CGF),
+                         Bld.getInt16(/*RequiresOMPRuntime=*/1)};
   CGF.EmitRuntimeCall(
       createNVPTXRuntimeFunction(OMPRTL_NVPTX__kmpc_kernel_init), Args);
 }
@@ -370,8 +374,10 @@ void CGOpenMPRuntimeNVPTX::emitGenericEntryFooter(CodeGenFunction &CGF,
 
   CGF.EmitBlock(TerminateBB);
   // Signal termination condition.
+  // TODO: Optimize runtime initialization and pass in correct value.
+  llvm::Value *Args[] = {CGF.Builder.getInt16(/*IsOMPRuntimeInitialized=*/1)};
   CGF.EmitRuntimeCall(
-      createNVPTXRuntimeFunction(OMPRTL_NVPTX__kmpc_kernel_deinit), None);
+      createNVPTXRuntimeFunction(OMPRTL_NVPTX__kmpc_kernel_deinit), Args);
   // Barrier to terminate worker threads.
   syncCTAThreads(CGF);
   // Master thread jumps to exit point.
@@ -597,23 +603,25 @@ CGOpenMPRuntimeNVPTX::createNVPTXRuntimeFunction(unsigned Function) {
   llvm::Constant *RTLFn = nullptr;
   switch (static_cast<OpenMPRTLFunctionNVPTX>(Function)) {
   case OMPRTL_NVPTX__kmpc_kernel_init: {
-    // Build void __kmpc_kernel_init(kmp_int32 thread_limit);
-    llvm::Type *TypeParams[] = {CGM.Int32Ty};
+    // Build void __kmpc_kernel_init(kmp_int32 thread_limit, int16_t
+    // RequiresOMPRuntime);
+    llvm::Type *TypeParams[] = {CGM.Int32Ty, CGM.Int16Ty};
     llvm::FunctionType *FnTy =
         llvm::FunctionType::get(CGM.VoidTy, TypeParams, /*isVarArg*/ false);
     RTLFn = CGM.CreateRuntimeFunction(FnTy, "__kmpc_kernel_init");
     break;
   }
   case OMPRTL_NVPTX__kmpc_kernel_deinit: {
-    // Build void __kmpc_kernel_deinit();
+    // Build void __kmpc_kernel_deinit(int16_t IsOMPRuntimeInitialized);
+    llvm::Type *TypeParams[] = {CGM.Int16Ty};
     llvm::FunctionType *FnTy =
-        llvm::FunctionType::get(CGM.VoidTy, llvm::None, /*isVarArg*/ false);
+        llvm::FunctionType::get(CGM.VoidTy, TypeParams, /*isVarArg*/ false);
     RTLFn = CGM.CreateRuntimeFunction(FnTy, "__kmpc_kernel_deinit");
     break;
   }
   case OMPRTL_NVPTX__kmpc_spmd_kernel_init: {
     // Build void __kmpc_spmd_kernel_init(kmp_int32 thread_limit,
-    // short RequiresOMPRuntime, short RequiresDataSharing);
+    // int16_t RequiresOMPRuntime, int16_t RequiresDataSharing);
     llvm::Type *TypeParams[] = {CGM.Int32Ty, CGM.Int16Ty, CGM.Int16Ty};
     llvm::FunctionType *FnTy =
         llvm::FunctionType::get(CGM.VoidTy, TypeParams, /*isVarArg*/ false);

diff --git a/clang/test/OpenMP/nvptx_parallel_codegen.cpp b/clang/test/OpenMP/nvptx_parallel_codegen.cpp
index 75c358a..ba889bf 100644 (file)
--- a/clang/test/OpenMP/nvptx_parallel_codegen.cpp
+++ b/clang/test/OpenMP/nvptx_parallel_codegen.cpp
@@ -166,7 +166,7 @@ int bar(int n){
   // CHECK: br label {{%?}}[[TERMINATE:.+]]
   //
   // CHECK: [[TERMINATE]]
-  // CHECK: call void @__kmpc_kernel_deinit()
+  // CHECK: call void @__kmpc_kernel_deinit(
   // CHECK: call void @llvm.nvvm.barrier0()
   // CHECK: br label {{%?}}[[EXIT]]
   //
@@ -303,7 +303,7 @@ int bar(int n){
   // CHECK: br label {{%?}}[[TERMINATE:.+]]
   //
   // CHECK: [[TERMINATE]]
-  // CHECK: call void @__kmpc_kernel_deinit()
+  // CHECK: call void @__kmpc_kernel_deinit(
   // CHECK: call void @llvm.nvvm.barrier0()
   // CHECK: br label {{%?}}[[EXIT]]
   //

diff --git a/clang/test/OpenMP/nvptx_target_codegen.cpp b/clang/test/OpenMP/nvptx_target_codegen.cpp
index d7ce7dc..23b40e1 100644 (file)
--- a/clang/test/OpenMP/nvptx_target_codegen.cpp
+++ b/clang/test/OpenMP/nvptx_target_codegen.cpp
@@ -91,7 +91,7 @@ int foo(int n) {
   // CHECK: br label {{%?}}[[TERMINATE:.+]]
   //
   // CHECK: [[TERMINATE]]
-  // CHECK: call void @__kmpc_kernel_deinit()
+  // CHECK: call void @__kmpc_kernel_deinit(
   // CHECK: call void @llvm.nvvm.barrier0()
   // CHECK: br label {{%?}}[[EXIT]]
   //
@@ -168,7 +168,7 @@ int foo(int n) {
   // CHECK: br label {{%?}}[[TERMINATE:.+]]
   //
   // CHECK: [[TERMINATE]]
-  // CHECK: call void @__kmpc_kernel_deinit()
+  // CHECK: call void @__kmpc_kernel_deinit(
   // CHECK: call void @llvm.nvvm.barrier0()
   // CHECK: br label {{%?}}[[EXIT]]
   //
@@ -278,7 +278,7 @@ int foo(int n) {
   // CHECK: br label {{%?}}[[TERMINATE:.+]]
   //
   // CHECK: [[TERMINATE]]
-  // CHECK: call void @__kmpc_kernel_deinit()
+  // CHECK: call void @__kmpc_kernel_deinit(
   // CHECK: call void @llvm.nvvm.barrier0()
   // CHECK: br label {{%?}}[[EXIT]]
   //
@@ -441,7 +441,7 @@ int bar(int n){
   // CHECK: br label {{%?}}[[TERMINATE:.+]]
   //
   // CHECK: [[TERMINATE]]
-  // CHECK: call void @__kmpc_kernel_deinit()
+  // CHECK: call void @__kmpc_kernel_deinit(
   // CHECK: call void @llvm.nvvm.barrier0()
   // CHECK: br label {{%?}}[[EXIT]]
   //
@@ -531,7 +531,7 @@ int bar(int n){
   // CHECK: br label {{%?}}[[TERMINATE:.+]]
   //
   // CHECK: [[TERMINATE]]
-  // CHECK: call void @__kmpc_kernel_deinit()
+  // CHECK: call void @__kmpc_kernel_deinit(
   // CHECK: call void @llvm.nvvm.barrier0()
   // CHECK: br label {{%?}}[[EXIT]]
   //
@@ -616,7 +616,7 @@ int bar(int n){
   // CHECK: br label {{%?}}[[TERMINATE:.+]]
   //
   // CHECK: [[TERMINATE]]
-  // CHECK: call void @__kmpc_kernel_deinit()
+  // CHECK: call void @__kmpc_kernel_deinit(
   // CHECK: call void @llvm.nvvm.barrier0()
   // CHECK: br label {{%?}}[[EXIT]]
   //

diff --git a/clang/test/OpenMP/nvptx_target_teams_codegen.cpp b/clang/test/OpenMP/nvptx_target_teams_codegen.cpp
index 4c5d1ef..b79fd18 100644 (file)
--- a/clang/test/OpenMP/nvptx_target_teams_codegen.cpp
+++ b/clang/test/OpenMP/nvptx_target_teams_codegen.cpp
@@ -127,7 +127,7 @@ int bar(int n){
   // CHECK: br label {{%?}}[[TERMINATE:.+]]
   //
   // CHECK: [[TERMINATE]]
-  // CHECK: call void @__kmpc_kernel_deinit()
+  // CHECK: call void @__kmpc_kernel_deinit(
   // CHECK: call void @llvm.nvvm.barrier0()
   // CHECK: br label {{%?}}[[EXIT]]
   //
@@ -215,7 +215,7 @@ int bar(int n){
   // CHECK: br label {{%?}}[[TERMINATE:.+]]
   //
   // CHECK: [[TERMINATE]]
-  // CHECK: call void @__kmpc_kernel_deinit()
+  // CHECK: call void @__kmpc_kernel_deinit(
   // CHECK: call void @llvm.nvvm.barrier0()
   // CHECK: br label {{%?}}[[EXIT]]
   //

diff --git a/clang/test/OpenMP/nvptx_teams_reduction_codegen.cpp b/clang/test/OpenMP/nvptx_teams_reduction_codegen.cpp
index ae129eb..d772318 100644 (file)
--- a/clang/test/OpenMP/nvptx_teams_reduction_codegen.cpp
+++ b/clang/test/OpenMP/nvptx_teams_reduction_codegen.cpp
@@ -84,7 +84,7 @@ int bar(int n){
   // CHECK: br label %[[EXIT]]
   //
   // CHECK: [[EXIT]]
-  // CHECK: call void @__kmpc_kernel_deinit()
+  // CHECK: call void @__kmpc_kernel_deinit(
 
   //
   // Reduction function
@@ -360,7 +360,7 @@ int bar(int n){
   // CHECK: br label %[[EXIT]]
   //
   // CHECK: [[EXIT]]
-  // CHECK: call void @__kmpc_kernel_deinit()
+  // CHECK: call void @__kmpc_kernel_deinit(
 
   //
   // Reduction function
@@ -776,7 +776,7 @@ int bar(int n){
   // CHECK: br label %[[EXIT]]
   //
   // CHECK: [[EXIT]]
-  // CHECK: call void @__kmpc_kernel_deinit()
+  // CHECK: call void @__kmpc_kernel_deinit(
 
   //
   // Reduction function