+define <8 x float> @concat_v8f32_4567CDEF_bc(<8 x float> %f0, <8 x float> %f1) {
+; ALL-LABEL: concat_v8f32_4567CDEF_bc:
+; ALL: # BB#0:
+; ALL-NEXT: vperm2f128 {{.*#+}} ymm0 = ymm0[2,3],ymm1[2,3]
+; ALL-NEXT: retq
+ %a0 = bitcast <8 x float> %f0 to <4 x i64>
+ %a1 = bitcast <8 x float> %f1 to <8 x i32>
+ %a0hi = shufflevector <4 x i64> %a0, <4 x i64> undef, <2 x i32> <i32 2, i32 3>
+ %a1hi = shufflevector <8 x i32> %a1, <8 x i32> undef, <4 x i32> <i32 4, i32 5, i32 6, i32 7>
+ %bc0hi = bitcast <2 x i64> %a0hi to <2 x i64>
+ %bc1hi = bitcast <4 x i32> %a1hi to <2 x i64>
+ %shuffle64 = shufflevector <2 x i64> %bc0hi, <2 x i64> %bc1hi, <4 x i32> <i32 0, i32 1, i32 2, i32 3>
+ %shuffle32 = bitcast <4 x i64> %shuffle64 to <8 x float>
+ ret <8 x float> %shuffle32
+}
+