This handles the missing cases of opencl vector literals.

Test cases provided by Anton Lokhmot.

llvm-svn: 135322

1 files changed, 18 insertions, 5 deletions

diff --git a/clang/lib/Sema/SemaExpr.cpp b/clang/lib/Sema/SemaExpr.cpp
index a99a5d2cc42..5efc36559d9 100644
--- a/clang/lib/Sema/SemaExpr.cpp
+++ b/clang/lib/Sema/SemaExpr.cpp
@@ -4222,13 +4222,14 @@ ExprResult Sema::BuildVectorLiteral(SourceLocation LParenLoc,
   assert(Ty->isVectorType() && "Expected vector type");
 
   llvm::SmallVector<Expr *, 8> initExprs;
+  const VectorType *VTy = Ty->getAs<VectorType>();
+  unsigned numElems = Ty->getAs<VectorType>()->getNumElements();
+  
   // '(...)' form of vector initialization in AltiVec: the number of
   // initializers must be one or must match the size of the vector.
   // If a single value is specified in the initializer then it will be
   // replicated to all the components of the vector
-  if (Ty->getAs<VectorType>()->getVectorKind() ==
-      VectorType::AltiVecVector) {
-    unsigned numElems = Ty->getAs<VectorType>()->getNumElements();
+  if (VTy->getVectorKind() == VectorType::AltiVecVector) {
     // The number of initializers must be one or must match the size of the
     // vector. If a single value is specified in the initializer then it will
     // be replicated to all the components of the vector
@@ -4248,10 +4249,22 @@ ExprResult Sema::BuildVectorLiteral(SourceLocation LParenLoc,
       for (unsigned i = 0, e = numExprs; i != e; ++i)
         initExprs.push_back(exprs[i]);
   }
-  else
+  else {
+    // For OpenCL, when the number of initializers is a single value,
+    // it will be replicated to all components of the vector.
+    if (getLangOptions().OpenCL &&
+        VTy->getVectorKind() == VectorType::GenericVector &&
+        numExprs == 1) {
+        QualType ElemTy = Ty->getAs<VectorType>()->getElementType();
+        ExprResult Literal = Owned(exprs[0]);
+        Literal = ImpCastExprToType(Literal.take(), ElemTy,
+                                    PrepareScalarCast(*this, Literal, ElemTy));
+        return BuildCStyleCastExpr(LParenLoc, TInfo, RParenLoc, Literal.take());
+    }
+    
     for (unsigned i = 0, e = numExprs; i != e; ++i)
       initExprs.push_back(exprs[i]);
-
+  }
   // FIXME: This means that pretty-printing the final AST will produce curly
   // braces instead of the original commas.
   InitListExpr *initE = new (Context) InitListExpr(Context, LParenLoc,