[OPENMP 4.1] Initial support for modifiers in 'linear' clause.

OpenMP 4.1 adds 3 optional modifiers to 'linear' clause.
Format of 'linear' clause has changed to:
```
linear(linear-list[ : linear-step])
```
where linear-list is one of the following
```
list
modifier(list)
```
where modifier is one of the following:
```
 ref (C++)
 val (C/C++)
 uval (C++)
```
Patch adds parsing and sema analysis for these modifiers.

llvm-svn: 245550

1 files changed, 7 insertions, 4 deletions

diff --git a/clang/lib/Sema/TreeTransform.h b/clang/lib/Sema/TreeTransform.h
index d285db597c4..7cc7b779724 100644
--- a/clang/lib/Sema/TreeTransform.h
+++ b/clang/lib/Sema/TreeTransform.h
@@ -1528,10 +1528,13 @@ public:
   OMPClause *RebuildOMPLinearClause(ArrayRef<Expr *> VarList, Expr *Step,
                                     SourceLocation StartLoc,
                                     SourceLocation LParenLoc,
+                                    OpenMPLinearClauseKind Modifier,
+                                    SourceLocation ModifierLoc,
                                     SourceLocation ColonLoc,
                                     SourceLocation EndLoc) {
     return getSema().ActOnOpenMPLinearClause(VarList, Step, StartLoc, LParenLoc,
-                                             ColonLoc, EndLoc);
+                                             Modifier, ModifierLoc, ColonLoc,
+                                             EndLoc);
   }
 
   /// \brief Build a new OpenMP 'aligned' clause.
@@ -7419,9 +7422,9 @@ TreeTransform<Derived>::TransformOMPLinearClause(OMPLinearClause *C) {
   ExprResult Step = getDerived().TransformExpr(C->getStep());
   if (Step.isInvalid())
     return nullptr;
-  return getDerived().RebuildOMPLinearClause(Vars, Step.get(), C->getLocStart(),
-                                             C->getLParenLoc(),
-                                             C->getColonLoc(), C->getLocEnd());
+  return getDerived().RebuildOMPLinearClause(
+      Vars, Step.get(), C->getLocStart(), C->getLParenLoc(), C->getModifier(),
+      C->getModifierLoc(), C->getColonLoc(), C->getLocEnd());
 }
 
 template <typename Derived>