Convert loads and stores of vec3 to vec4 to achieve better code generation. Add test case.

llvm-svn: 162002

1 files changed, 9 insertions, 0 deletions

diff --git a/clang/test/CodeGenOpenCL/vectorLoadStore.cl b/clang/test/CodeGenOpenCL/vectorLoadStore.cl
new file mode 100644
index 000000000000..ba0405d09863
--- /dev/null
+++ b/clang/test/CodeGenOpenCL/vectorLoadStore.cl
@@ -0,0 +1,9 @@
+// RUN: %clang_cc1 %s -emit-llvm -O0 -o - | FileCheck %s
+
+typedef char char3 __attribute((ext_vector_type(3)));;
+
+// Check for optimized vec3 load/store which treats vec3 as vec4.
+void foo(char3 *P, char3 *Q) {
+  *P = *Q;
+  // CHECK: %extractVec = shufflevector <4 x i8> %loadVec4, <4 x i8> undef, <3 x i32> <i32 0, i32 1, i32 2>
+}