Add correct NEON encodings for the "multiple single elements" form of vld.

[oota-llvm.git] / test / Transforms / InstCombine / vec_shuffle.ll

diff --git a/test/Transforms/InstCombine/vec_shuffle.ll b/test/Transforms/InstCombine/vec_shuffle.ll
index d4977fb807edf4fd789776f269bcf656b27ed9d3..bd36e9ecb1eb42f22bb1c5f7bed1a36a4e588158 100644 (file)
--- a/test/Transforms/InstCombine/vec_shuffle.ll
+++ b/test/Transforms/InstCombine/vec_shuffle.ll
@@ -88,6 +88,19 @@ define <4 x i8> @test9(<16 x i8> %tmp6) nounwind {
        ret <4 x i8> %tmp9
 }
 
+; Same as test9, but make sure that "undef" mask values are not confused with
+; mask values of 2*N, where N is the mask length.  These shuffles should not
+; be folded (because [8,9,4,8] may not be a mask supported by the target).
+define <4 x i8> @test9a(<16 x i8> %tmp6) nounwind {
+; CHECK: @test9a
+; CHECK-NEXT: shufflevector
+; CHECK-NEXT: shufflevector
+; CHECK-NEXT: ret
+       %tmp7 = shufflevector <16 x i8> %tmp6, <16 x i8> undef, <4 x i32> < i32 undef, i32 9, i32 4, i32 8 >            ; <<4 x i8>> [#uses=1]
+       %tmp9 = shufflevector <4 x i8> %tmp7, <4 x i8> undef, <4 x i32> < i32 3, i32 1, i32 2, i32 0 >          ; <<4 x i8>> [#uses=1]
+       ret <4 x i8> %tmp9
+}
+
 ; Redundant vector splats should be removed.  Radar 8597790.
 define <4 x i32> @test10(<4 x i32> %tmp5) nounwind {
 ; CHECK: @test10