[OpenCL] Restrict swizzle length check to OpenCL mode

Changes behavior introduced in r298369 to only error out on
vector component invalid length access on OpenCL mode.

Differential Revision: https://reviews.llvm.org/D38868

rdar://problem/33568748

llvm-svn: 316016

1 files changed, 10 insertions, 0 deletions

diff --git a/clang/test/Sema/vector_swizzle_length.c b/clang/test/Sema/vector_swizzle_length.c
new file mode 100644
index 00000000000..5e6b1e7d67a
--- /dev/null
+++ b/clang/test/Sema/vector_swizzle_length.c
@@ -0,0 +1,10 @@
+// RUN: %clang_cc1 -x c %s -verify -pedantic -fsyntax-only
+// expected-no-diagnostics
+
+typedef float float8 __attribute__((ext_vector_type(8)));
+
+void foo() {
+    float8 f2 = (float8){0, 0, 0, 0, 0, 0, 0, 0};
+    (void)f2.s01234;
+    (void)f2.xyzxy;
+}