[OpenCL] Traverse vector types for ocl extensions support

Summary:
Given the following kernel:
__kernel void foo() {
  double d;
  double4 dd;
}

and cl_khr_fp64 is disabled, the compilation would fail due to
the presence of 'double d', but when removed, it passes.

The expectation is that extended vector types of unsupported types
will also be unsupported.

The patch adds the check for this scenario.

Patch by: Ofir Cohen

Reviewers: bader, Anastasia, AlexeySotkin, yaxunl

Reviewed By: Anastasia

Subscribers: cfe-commits

Differential Revision: https://reviews.llvm.org/D51296

llvm-svn: 341309

2 files changed, 15 insertions, 0 deletions

diff --git a/clang/lib/Sema/Sema.cpp b/clang/lib/Sema/Sema.cpp
index e4bf27de8b8..bd2637a72ef 100644
--- a/clang/lib/Sema/Sema.cpp
+++ b/clang/lib/Sema/Sema.cpp
@@ -1889,6 +1889,14 @@ bool Sema::checkOpenCLDisabledTypeDeclSpec(const DeclSpec &DS, QualType QT) {
   if (auto TagT = dyn_cast<TagType>(QT.getCanonicalType().getTypePtr()))
     Decl = TagT->getDecl();
   auto Loc = DS.getTypeSpecTypeLoc();
+
+  // Check extensions for vector types.
+  // e.g. double4 is not allowed when cl_khr_fp64 is absent.
+  if (QT->isExtVectorType()) {
+    auto TypePtr = QT->castAs<ExtVectorType>()->getElementType().getTypePtr();
+    return checkOpenCLDisabledTypeOrDecl(TypePtr, Loc, QT, OpenCLTypeExtMap);
+  }
+
   if (checkOpenCLDisabledTypeOrDecl(Decl, Loc, QT, OpenCLDeclExtMap))
     return true;
 
diff --git a/clang/test/SemaOpenCL/extensions.cl b/clang/test/SemaOpenCL/extensions.cl
index 6afb11e42a6..5f95e32d4a5 100644
--- a/clang/test/SemaOpenCL/extensions.cl
+++ b/clang/test/SemaOpenCL/extensions.cl
@@ -70,6 +70,13 @@ void f2(void) {
 // expected-error@-2{{use of type 'double' requires cl_khr_fp64 extension to be enabled}}
 #endif
 
+  typedef double double4 __attribute__((ext_vector_type(4)));
+  double4 d4 = {0.0f, 2.0f, 3.0f, 1.0f};
+#ifdef NOFP64
+// expected-error@-3 {{use of type 'double' requires cl_khr_fp64 extension to be enabled}}
+// expected-error@-3 {{use of type 'double4' (vector of 4 'double' values) requires cl_khr_fp64 extension to be enabled}}
+#endif
+
   (void) 1.0;
 
 #ifdef NOFP64