[OpenMP] Codegen for use_device_ptr clause.

Summary: This patch adds support for the use_device_ptr clause. It includes changes in SEMA that could not be tested without codegen, namely, the use of the first private logic and mappable expressions support.

Reviewers: hfinkel, carlo.bertolli, arpith-jacob, kkwli0, ABataev

Subscribers: caomhin, cfe-commits

Differential Revision: https://reviews.llvm.org/D22691

llvm-svn: 276977

1 files changed, 57 insertions, 13 deletions

diff --git a/clang/lib/AST/OpenMPClause.cpp b/clang/lib/AST/OpenMPClause.cpp
index d04ba727bb05..16871264f3e2 100644
--- a/clang/lib/AST/OpenMPClause.cpp
+++ b/clang/lib/AST/OpenMPClause.cpp
@@ -732,22 +732,66 @@ OMPFromClause *OMPFromClause::CreateEmpty(const ASTContext &C, unsigned NumVars,
                                  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);
+void OMPUseDevicePtrClause::setPrivateCopies(ArrayRef<Expr *> VL) {
+  assert(VL.size() == varlist_size() &&
+         "Number of private copies is not the same as the preallocated buffer");
+  std::copy(VL.begin(), VL.end(), varlist_end());
+}
+
+void OMPUseDevicePtrClause::setInits(ArrayRef<Expr *> VL) {
+  assert(VL.size() == varlist_size() &&
+         "Number of inits is not the same as the preallocated buffer");
+  std::copy(VL.begin(), VL.end(), getPrivateCopies().end());
+}
+
+OMPUseDevicePtrClause *OMPUseDevicePtrClause::Create(
+    const ASTContext &C, SourceLocation StartLoc, SourceLocation LParenLoc,
+    SourceLocation EndLoc, ArrayRef<Expr *> Vars, ArrayRef<Expr *> PrivateVars,
+    ArrayRef<Expr *> Inits, ArrayRef<ValueDecl *> Declarations,
+    MappableExprComponentListsRef ComponentLists) {
+  unsigned NumVars = Vars.size();
+  unsigned NumUniqueDeclarations =
+      getUniqueDeclarationsTotalNumber(Declarations);
+  unsigned NumComponentLists = ComponentLists.size();
+  unsigned NumComponents = getComponentsTotalNumber(ComponentLists);
+
+  // We need to allocate:
+  // 3 x NumVars x Expr* - we have an original list expression for each clause
+  // list entry and an equal number of private copies and inits.
+  // NumUniqueDeclarations x ValueDecl* - unique base declarations associated
+  // with each component list.
+  // (NumUniqueDeclarations + NumComponentLists) x unsigned - we specify the
+  // number of lists for each unique declaration and the size of each component
+  // list.
+  // NumComponents x MappableComponent - the total of all the components in all
+  // the lists.
+  void *Mem = C.Allocate(
+      totalSizeToAlloc<Expr *, ValueDecl *, unsigned,
+                       OMPClauseMappableExprCommon::MappableComponent>(
+          3 * NumVars, NumUniqueDeclarations,
+          NumUniqueDeclarations + NumComponentLists, NumComponents));
+
+  OMPUseDevicePtrClause *Clause = new (Mem) OMPUseDevicePtrClause(
+      StartLoc, LParenLoc, EndLoc, NumVars, NumUniqueDeclarations,
+      NumComponentLists, NumComponents);
+
+  Clause->setVarRefs(Vars);
+  Clause->setPrivateCopies(PrivateVars);
+  Clause->setInits(Inits);
+  Clause->setClauseInfo(Declarations, ComponentLists);
   return Clause;
 }
 
-OMPUseDevicePtrClause *OMPUseDevicePtrClause::CreateEmpty(const ASTContext &C,
-                                                          unsigned N) {
-  void *Mem = C.Allocate(totalSizeToAlloc<Expr *>(N));
-  return new (Mem) OMPUseDevicePtrClause(N);
+OMPUseDevicePtrClause *OMPUseDevicePtrClause::CreateEmpty(
+    const ASTContext &C, unsigned NumVars, unsigned NumUniqueDeclarations,
+    unsigned NumComponentLists, unsigned NumComponents) {
+  void *Mem = C.Allocate(
+      totalSizeToAlloc<Expr *, ValueDecl *, unsigned,
+                       OMPClauseMappableExprCommon::MappableComponent>(
+          3 * NumVars, NumUniqueDeclarations,
+          NumUniqueDeclarations + NumComponentLists, NumComponents));
+  return new (Mem) OMPUseDevicePtrClause(NumVars, NumUniqueDeclarations,
+                                         NumComponentLists, NumComponents);
 }
 
 OMPIsDevicePtrClause *OMPIsDevicePtrClause::Create(const ASTContext &C,