5 files changed, 86 insertions, 2 deletions
diff --git a/clang/lib/CodeGen/CGOpenMPRuntimeNVPTX.cpp b/clang/lib/CodeGen/CGOpenMPRuntimeNVPTX.cpp
new file mode 100644
index 00000000000..314a4b54494
--- /dev/null
+++ b/clang/lib/CodeGen/CGOpenMPRuntimeNVPTX.cpp
@@ -0,0 +1,21 @@
+//===---- CGOpenMPRuntimeNVPTX.cpp - Interface to OpenMP NVPTX Runtimes ---===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This provides a class for OpenMP runtime code generation specialized to NVPTX
+// targets.
+//
+//===----------------------------------------------------------------------===//
+
+#include "CGOpenMPRuntimeNVPTX.h"
+
+using namespace clang;
+using namespace CodeGen;
+
+CGOpenMPRuntimeNVPTX::CGOpenMPRuntimeNVPTX(CodeGenModule &CGM)
+    : CGOpenMPRuntime(CGM) {}
diff --git a/clang/lib/CodeGen/CGOpenMPRuntimeNVPTX.h b/clang/lib/CodeGen/CGOpenMPRuntimeNVPTX.h
new file mode 100644
index 00000000000..60bb9acbc7e
--- /dev/null
+++ b/clang/lib/CodeGen/CGOpenMPRuntimeNVPTX.h
@@ -0,0 +1,31 @@
+//===----- CGOpenMPRuntimeNVPTX.h - Interface to OpenMP NVPTX Runtimes ----===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This provides a class for OpenMP runtime code generation specialized to NVPTX
+// targets.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_CLANG_LIB_CODEGEN_CGOPENMPRUNTIMENVPTX_H
+#define LLVM_CLANG_LIB_CODEGEN_CGOPENMPRUNTIMENVPTX_H
+
+#include "CGOpenMPRuntime.h"
+
+namespace clang {
+namespace CodeGen {
+
+class CGOpenMPRuntimeNVPTX : public CGOpenMPRuntime {
+public:
+  explicit CGOpenMPRuntimeNVPTX(CodeGenModule &CGM);
+};
+
+} // CodeGen namespace.
+} // clang namespace.
+
+#endif // LLVM_CLANG_LIB_CODEGEN_CGOPENMPRUNTIMENVPTX_H
diff --git a/clang/lib/CodeGen/CMakeLists.txt b/clang/lib/CodeGen/CMakeLists.txt
index ed028ad4d21..353f6016317 100644
--- a/clang/lib/CodeGen/CMakeLists.txt
+++ b/clang/lib/CodeGen/CMakeLists.txt
@@ -57,6 +57,7 @@ add_clang_library(clangCodeGen
   CGObjCRuntime.cpp
   CGOpenCLRuntime.cpp
   CGOpenMPRuntime.cpp
+  CGOpenMPRuntimeNVPTX.cpp
   CGRecordLayoutBuilder.cpp
   CGStmt.cpp
   CGStmtOpenMP.cpp
diff --git a/clang/lib/CodeGen/CodeGenModule.cpp b/clang/lib/CodeGen/CodeGenModule.cpp
index a30e62499fa..aabcc524c93 100644
--- a/clang/lib/CodeGen/CodeGenModule.cpp
+++ b/clang/lib/CodeGen/CodeGenModule.cpp
@@ -20,6 +20,7 @@
 #include "CGObjCRuntime.h"
 #include "CGOpenCLRuntime.h"
 #include "CGOpenMPRuntime.h"
+#include "CGOpenMPRuntimeNVPTX.h"
 #include "CodeGenFunction.h"
 #include "CodeGenPGO.h"
 #include "CodeGenTBAA.h"
@@ -200,7 +201,20 @@ void CodeGenModule::createOpenCLRuntime() {
 }
 
 void CodeGenModule::createOpenMPRuntime() {
-  OpenMPRuntime = new CGOpenMPRuntime(*this);
+  // Select a specialized code generation class based on the target, if any.
+  // If it does not exist use the default implementation.
+  switch (getTarget().getTriple().getArch()) {
+
+  case llvm::Triple::nvptx:
+  case llvm::Triple::nvptx64:
+    assert(getLangOpts().OpenMPIsDevice &&
+           "OpenMP NVPTX is only prepared to deal with device code.");
+    OpenMPRuntime = new CGOpenMPRuntimeNVPTX(*this);
+    break;
+  default:
+    OpenMPRuntime = new CGOpenMPRuntime(*this);
+    break;
+  }
 }
 
 void CodeGenModule::createCUDARuntime() {
diff --git a/clang/lib/Frontend/CompilerInvocation.cpp b/clang/lib/Frontend/CompilerInvocation.cpp
index 2403385ca4a..2b191ca8dc3 100644
--- a/clang/lib/Frontend/CompilerInvocation.cpp
+++ b/clang/lib/Frontend/CompilerInvocation.cpp
@@ -1446,6 +1446,7 @@ static Visibility parseVisibility(Arg *arg, ArgList &args,
 }
 
 static void ParseLangArgs(LangOptions &Opts, ArgList &Args, InputKind IK,
+                          const TargetOptions &TargetOpts,
                           DiagnosticsEngine &Diags) {
   // FIXME: Cleanup per-file based stuff.
   LangStandard::Kind LangStd = LangStandard::lang_unspecified;
@@ -1841,6 +1842,22 @@ static void ParseLangArgs(LangOptions &Opts, ArgList &Args, InputKind IK,
   Opts.OpenMPIsDevice =
       Opts.OpenMP && Args.hasArg(options::OPT_fopenmp_is_device);
 
+  // Provide diagnostic when a given target is not expected to be an OpenMP
+  // device or host.
+  if (Opts.OpenMP && !Opts.OpenMPIsDevice) {
+    llvm::Triple T(TargetOpts.Triple);
+    switch (T.getArch()) {
+    default:
+      break;
+    // Add unsupported host targets here:
+    case llvm::Triple::nvptx:
+    case llvm::Triple::nvptx64:
+      Diags.Report(clang::diag::err_drv_omp_host_target_not_supported)
+          << TargetOpts.Triple;
+      break;
+    }
+  }
+
   // Get the OpenMP target triples if any.
   if (Arg *A = Args.getLastArg(options::OPT_omptargets_EQ)) {
 
@@ -2107,7 +2124,7 @@ bool CompilerInvocation::CreateFromArgs(CompilerInvocation &Res,
                         Diags, Res.getLangOpts()->Sanitize);
   } else {
     // Other LangOpts are only initialzed when the input is not AST or LLVM IR.
-    ParseLangArgs(*Res.getLangOpts(), Args, DashX, Diags);
+    ParseLangArgs(*Res.getLangOpts(), Args, DashX, Res.getTargetOpts(), Diags);
     if (Res.getFrontendOpts().ProgramAction == frontend::RewriteObjC)
       Res.getLangOpts()->ObjCExceptions = 1;
   }