[OpenCL] Enabling the usage of CLK_NULL_QUEUE as compare operand.

Summary: Enabling the compression of CLK_NULL_QUEUE to variable of type queue_t.

Reviewers: Anastasia

Subscribers: cfe-commits, yaxunl, bader

Differential Revision: https://reviews.llvm.org/D27569

llvm-svn: 290171

1 files changed, 18 insertions, 0 deletions

diff --git a/clang/test/CodeGenOpenCL/null_queue.cl b/clang/test/CodeGenOpenCL/null_queue.cl
new file mode 100644
index 00000000000..cdcd7eef2ed
--- /dev/null
+++ b/clang/test/CodeGenOpenCL/null_queue.cl
@@ -0,0 +1,18 @@
+// RUN: %clang_cc1 -O0 -cl-std=CL2.0  -emit-llvm %s -o - | FileCheck %s
+extern queue_t get_default_queue();
+
+bool compare() {
+  return 0 == get_default_queue() &&
+         get_default_queue() == 0;
+  // CHECK: icmp eq %opencl.queue_t* null, %{{.*}}
+  // CHECK: icmp eq %opencl.queue_t* %{{.*}}, null
+}
+
+void func(queue_t q);
+
+void init() {
+  queue_t q = 0;
+  func(0);
+  // CHECK: store %opencl.queue_t* null, %opencl.queue_t** %q
+  // CHECK: call void @func(%opencl.queue_t* null)
+}