[OpenMP] Initial implementation of parse+sema for clause use_device_ptr of 'target data'

http://reviews.llvm.org/D21904

This patch is similar to the implementation of 'private' clause: it adds a list of private pointers to be used within the target data region to store the device pointers returned by the runtime.
Please refer to the following document for a full description of what the runtime witll return in this case (page 10 and 11):
https://github.com/clang-omp/OffloadingDesign

I am happy to answer any question related to the runtime interface to help reviewing this patch.

llvm-svn: 275271

3 files changed, 32 insertions, 0 deletions

diff --git a/clang/lib/AST/OpenMPClause.cpp b/clang/lib/AST/OpenMPClause.cpp
index 5b51c277d6f..6e9f4ee9f5f 100644
--- a/clang/lib/AST/OpenMPClause.cpp
+++ b/clang/lib/AST/OpenMPClause.cpp
@@ -89,6 +89,7 @@ const OMPClauseWithPreInit *OMPClauseWithPreInit::get(const OMPClause *C) {
   case OMPC_uniform:
   case OMPC_to:
   case OMPC_from:
+  case OMPC_use_device_ptr:
     break;
   }
 
@@ -152,6 +153,7 @@ const OMPClauseWithPostUpdate *OMPClauseWithPostUpdate::get(const OMPClause *C)
   case OMPC_uniform:
   case OMPC_to:
   case OMPC_from:
+  case OMPC_use_device_ptr:
     break;
   }
 
@@ -727,3 +729,21 @@ OMPFromClause *OMPFromClause::CreateEmpty(const ASTContext &C, unsigned NumVars,
   return new (Mem) OMPFromClause(NumVars, NumUniqueDeclarations,
                                  NumComponentLists, NumComponents);
 }
+
+OMPUseDevicePtrClause *OMPUseDevicePtrClause::Create(const ASTContext &C,
+                                                     SourceLocation StartLoc,
+                                                     SourceLocation LParenLoc,
+                                                     SourceLocation EndLoc,
+                                                     ArrayRef<Expr *> VL) {
+  void *Mem = C.Allocate(totalSizeToAlloc<Expr *>(VL.size()));
+  OMPUseDevicePtrClause *Clause =
+      new (Mem) OMPUseDevicePtrClause(StartLoc, LParenLoc, EndLoc, VL.size());
+  Clause->setVarRefs(VL);
+  return Clause;
+}
+
+OMPUseDevicePtrClause *OMPUseDevicePtrClause::CreateEmpty(const ASTContext &C,
+                                                          unsigned N) {
+  void *Mem = C.Allocate(totalSizeToAlloc<Expr *>(N));
+  return new (Mem) OMPUseDevicePtrClause(N);
+}
diff --git a/clang/lib/AST/StmtPrinter.cpp b/clang/lib/AST/StmtPrinter.cpp
index cb6298b160e..89f2ad4cf96 100644
--- a/clang/lib/AST/StmtPrinter.cpp
+++ b/clang/lib/AST/StmtPrinter.cpp
@@ -947,6 +947,14 @@ void OMPClausePrinter::VisitOMPDefaultmapClause(OMPDefaultmapClause *Node) {
     Node->getDefaultmapKind());
   OS << ")";
 }
+
+void OMPClausePrinter::VisitOMPUseDevicePtrClause(OMPUseDevicePtrClause *Node) {
+  if (!Node->varlist_empty()) {
+    OS << "use_device_ptr";
+    VisitOMPClauseList(Node, '(');
+    OS << ")";
+  }
+}
 }
 
 //===----------------------------------------------------------------------===//
diff --git a/clang/lib/AST/StmtProfile.cpp b/clang/lib/AST/StmtProfile.cpp
index aaeb6e986ca..2028b714a7d 100644
--- a/clang/lib/AST/StmtProfile.cpp
+++ b/clang/lib/AST/StmtProfile.cpp
@@ -529,6 +529,10 @@ void OMPClauseProfiler::VisitOMPToClause(const OMPToClause *C) {
 void OMPClauseProfiler::VisitOMPFromClause(const OMPFromClause *C) {
   VisitOMPClauseList(C);
 }
+void OMPClauseProfiler::VisitOMPUseDevicePtrClause(
+    const OMPUseDevicePtrClause *C) {
+  VisitOMPClauseList(C);
+}
 }
 
 void