1 files changed, 23 insertions, 0 deletions
diff --git a/test/CodeGen/AArch64/arm64-2014-04-29-EXT-undef-mask.ll b/test/CodeGen/AArch64/arm64-2014-04-29-EXT-undef-mask.ll
new file mode 100644
index 0000000..1b2d543
--- /dev/null
+++ b/test/CodeGen/AArch64/arm64-2014-04-29-EXT-undef-mask.ll
@@ -0,0 +1,23 @@
+; RUN: llc < %s -O0 -march=arm64 -aarch64-neon-syntax=apple | FileCheck %s
+
+; The following 2 test cases test shufflevector with beginning UNDEF mask.
+define <8 x i16> @test_vext_undef_traverse(<8 x i16> %in) {
+;CHECK-LABEL: test_vext_undef_traverse:
+;CHECK: {{ext.16b.*v0, #4}}
+  %vext = shufflevector <8 x i16> <i16 undef, i16 undef, i16 undef, i16 undef, i16 undef, i16 undef, i16 0, i16 0>, <8 x i16> %in, <8 x i32> <i32 undef, i32 undef, i32 undef, i32 undef, i32 6, i32 7, i32 8, i32 9>
+  ret <8 x i16> %vext
+}
+
+define <8 x i16> @test_vext_undef_traverse2(<8 x i16> %in) {
+;CHECK-LABEL: test_vext_undef_traverse2:
+;CHECK: {{ext.16b.*v0, #6}}
+  %vext = shufflevector <8 x i16> %in, <8 x i16> <i16 undef, i16 undef, i16 undef, i16 undef, i16 undef, i16 undef, i16 undef, i16 undef>, <8 x i32> <i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 0, i32 1, i32 2>
+  ret <8 x i16> %vext
+}
+
+define <8 x i8> @test_vext_undef_traverse3(<8 x i8> %in) {
+;CHECK-LABEL: test_vext_undef_traverse3:
+;CHECK: {{ext.8b.*v0, #6}}
+  %vext = shufflevector <8 x i8> %in, <8 x i8> <i8 undef, i8 undef, i8 undef, i8 undef, i8 undef, i8 undef, i8 undef, i8 undef>, <8 x i32> <i32 undef, i32 undef, i32 undef, i32 undef, i32 2, i32 3, i32 4, i32 5>
+  ret <8 x i8> %vext
+}