Disable the warning for missing prototypes for OpenCL kernels. Includes testcase.

llvm-svn: 160766

2 files changed, 10 insertions, 0 deletions

diff --git a/clang/lib/Sema/SemaDecl.cpp b/clang/lib/Sema/SemaDecl.cpp
index 12444e55594..7233fc7c13e 100644
--- a/clang/lib/Sema/SemaDecl.cpp
+++ b/clang/lib/Sema/SemaDecl.cpp
@@ -7509,6 +7509,10 @@ static bool ShouldWarnAboutMissingPrototype(const FunctionDecl *FD) {
   if (FD->isFunctionTemplateSpecialization())
     return false;
 
+  // Don't warn for OpenCL kernels.
+  if (FD->hasAttr<OpenCLKernelAttr>())
+    return false;
+  
   bool MissingPrototype = true;
   for (const FunctionDecl *Prev = FD->getPreviousDecl();
        Prev; Prev = Prev->getPreviousDecl()) {
diff --git a/clang/test/SemaOpenCL/warn-missing-prototypes.cl b/clang/test/SemaOpenCL/warn-missing-prototypes.cl
new file mode 100644
index 00000000000..487cb28399a
--- /dev/null
+++ b/clang/test/SemaOpenCL/warn-missing-prototypes.cl
@@ -0,0 +1,6 @@
+// RUN: %clang_cc1 -fsyntax-only -verify -Wmissing-prototypes %s
+
+void f() { } // expected-warning {{no previous prototype for function 'f'}}
+
+// Don't warn about kernel functions.
+kernel void g() { }