From 4bfc35509405ff7db4de3003f863d4eeea13ea19 Mon Sep 17 00:00:00 2001
From: Tanya Lattner <tonic@nondot.org>
Date: Thu, 26 Jul 2012 00:08:28 +0000
Subject: [PATCH] Disable the warning for missing prototypes for OpenCL
 kernels. Includes testcase.

llvm-svn: 160766
---
 clang/lib/Sema/SemaDecl.cpp                      | 4 ++++
 clang/test/SemaOpenCL/warn-missing-prototypes.cl | 6 ++++++
 2 files changed, 10 insertions(+)
 create mode 100644 clang/test/SemaOpenCL/warn-missing-prototypes.cl

diff --git a/clang/lib/Sema/SemaDecl.cpp b/clang/lib/Sema/SemaDecl.cpp
index 12444e555941..7233fc7c13e3 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 000000000000..487cb28399a3
--- /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() { }