Add a new LangOpt NativeHalfType. This option allows for native half/fp16

operations (as opposed to storage only half/fp16).

Also add some semantic checks for OpenCL half types.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@173254 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 15 insertions, 0 deletions

diff --git a/lib/Sema/SemaCast.cpp b/lib/Sema/SemaCast.cpp
index 676db464b6..d1e95d7df9 100644
--- a/lib/Sema/SemaCast.cpp
+++ b/lib/Sema/SemaCast.cpp
@@ -2104,6 +2104,21 @@ void CastOperation::CheckCStyleCast() {
     }
   }
 
+  if (Self.getLangOpts().OpenCL && !Self.getOpenCLOptions().cl_khr_fp16) {
+    if (DestType->isHalfType()) {
+      Self.Diag(SrcExpr.get()->getLocStart(), diag::err_opencl_cast_to_half)
+        << DestType << SrcExpr.get()->getSourceRange();
+      SrcExpr = ExprError();
+      return;
+    }
+    if (SrcExpr.get()->getType()->isHalfType()) {
+      Self.Diag(SrcExpr.get()->getLocStart(), diag::err_opencl_cast_from_half)
+        << SrcType << SrcExpr.get()->getSourceRange();
+      SrcExpr = ExprError();
+      return;
+    }
+  }
+
   // ARC imposes extra restrictions on casts.
   if (Self.getLangOpts().ObjCAutoRefCount) {
     checkObjCARCConversion(Sema::CCK_CStyleCast);