ret <4 x i8> %tmp9
}
+; Test fold of two shuffles where the first shuffle vectors inputs are a
+; different length then the second.
+define <4 x i8> @test9b(<4 x i8> %tmp6, <4 x i8> %tmp7) nounwind {
+; CHECK: @test9
+; CHECK-NEXT: shufflevector
+; CHECK-NEXT: ret
+ %tmp1 = shufflevector <4 x i8> %tmp6, <4 x i8> %tmp7, <8 x i32> <i32 0, i32 1, i32 4, i32 5, i32 4, i32 5, i32 2, i32 3> ; <<4 x i8>> [#uses=1]
+ %tmp9 = shufflevector <8 x i8> %tmp1, <8 x i8> undef, <4 x i32> <i32 0, i32 1, i32 4, i32 5> ; <<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
%tmp7 = shufflevector <4 x i32> %tmp6, <4 x i32> undef, <4 x i32> zeroinitializer
ret <4 x i32> %tmp7
}
+
+; Test fold of two shuffles where the two shufflevector inputs's op1 are
+; the same
+define <8 x i8> @test11(<16 x i8> %tmp6) nounwind {
+; CHECK: @test11
+; CHECK-NEXT: shufflevector <16 x i8> %tmp6, <16 x i8> undef, <8 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7>
+; CHECK-NEXT: ret
+ %tmp1 = shufflevector <16 x i8> %tmp6, <16 x i8> undef, <4 x i32> <i32 0, i32 1, i32 2, i32 3> ; <<4 x i8>> [#uses=1]
+ %tmp2 = shufflevector <16 x i8> %tmp6, <16 x i8> undef, <4 x i32> <i32 4, i32 5, i32 6, i32 7> ; <<4 x i8>> [#uses=1]
+ %tmp3 = shufflevector <4 x i8> %tmp1, <4 x i8> %tmp2, <8 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7> ; <<8 x i8>> [#uses=1]
+ ret <8 x i8> %tmp3
+}
+
+; Test fold of two shuffles where the first shufflevector's inputs are
+; the same as the second
+define <8 x i8> @test12(<8 x i8> %tmp6, <8 x i8> %tmp2) nounwind {
+; CHECK: @test12
+; CHECK-NEXT: shufflevector <8 x i8> %tmp6, <8 x i8> %tmp2, <8 x i32> <i32 0, i32 1, i32 2, i32 3, i32 9, i32 8, i32 11, i32 12>
+; CHECK-NEXT: ret
+ %tmp1 = shufflevector <8 x i8> %tmp6, <8 x i8> undef, <8 x i32> <i32 0, i32 1, i32 2, i32 3, i32 5, i32 4, i32 undef, i32 7> ; <<8 x i8>> [#uses=1]
+ %tmp3 = shufflevector <8 x i8> %tmp1, <8 x i8> %tmp2, <8 x i32> <i32 0, i32 1, i32 2, i32 3, i32 9, i32 8, i32 11, i32 12> ; <<8 x i8>> [#uses=1]
+ ret <8 x i8> %tmp3
+}
+
+; Test fold of two shuffles where the first shufflevector's inputs are
+; the same as the second
+define <8 x i8> @test12a(<8 x i8> %tmp6, <8 x i8> %tmp2) nounwind {
+; CHECK: @test12a
+; CHECK-NEXT: shufflevector <8 x i8> %tmp2, <8 x i8> %tmp6, <8 x i32> <i32 0, i32 3, i32 1, i32 4, i32 8, i32 9, i32 10, i32 11>
+; CHECK-NEXT: ret
+ %tmp1 = shufflevector <8 x i8> %tmp6, <8 x i8> undef, <8 x i32> <i32 0, i32 1, i32 2, i32 3, i32 5, i32 4, i32 undef, i32 7> ; <<8 x i8>> [#uses=1]
+ %tmp3 = shufflevector <8 x i8> %tmp2, <8 x i8> %tmp1, <8 x i32> <i32 0, i32 3, i32 1, i32 4, i32 8, i32 9, i32 10, i32 11> ; <<8 x i8>> [#uses=1]
+ ret <8 x i8> %tmp3
+}
+