diff --git a/llvm/test/CodeGen/X86/bitcast-and-setcc-256.ll b/llvm/test/CodeGen/X86/bitcast-and-setcc-256.ll
index 2e6501ef1c772..2ff9dd4d94242 100644
--- a/llvm/test/CodeGen/X86/bitcast-and-setcc-256.ll
+++ b/llvm/test/CodeGen/X86/bitcast-and-setcc-256.ll
@@ -904,3 +904,93 @@ define i8 @v4i32_concat_undef(<4 x i32> %vec) {
   %res = bitcast <8 x i1> %insertvec to i8
   ret i8 %res
 }
+
+define i8 @v2i64_concat_undef(<2 x i64> %vec) {
+; SSE2-SSSE3-LABEL: v2i64_concat_undef:
+; SSE2-SSSE3:       # %bb.0:
+; SSE2-SSSE3-NEXT:    pxor %xmm1, %xmm1
+; SSE2-SSSE3-NEXT:    pcmpeqd %xmm0, %xmm1
+; SSE2-SSSE3-NEXT:    pshufd {{.*#+}} xmm0 = xmm1[1,3,3,2]
+; SSE2-SSSE3-NEXT:    pshufd {{.*#+}} xmm1 = xmm1[0,2,2,3]
+; SSE2-SSSE3-NEXT:    pand %xmm0, %xmm1
+; SSE2-SSSE3-NEXT:    pshuflw {{.*#+}} xmm0 = xmm1[0,2,2,3,4,5,6,7]
+; SSE2-SSSE3-NEXT:    psllw $15, %xmm0
+; SSE2-SSSE3-NEXT:    packsswb %xmm0, %xmm0
+; SSE2-SSSE3-NEXT:    pmovmskb %xmm0, %eax
+; SSE2-SSSE3-NEXT:    # kill: def $al killed $al killed $eax
+; SSE2-SSSE3-NEXT:    retq
+;
+; AVX12-LABEL: v2i64_concat_undef:
+; AVX12:       # %bb.0:
+; AVX12-NEXT:    vpxor %xmm1, %xmm1, %xmm1
+; AVX12-NEXT:    vpcmpeqq %xmm1, %xmm0, %xmm0
+; AVX12-NEXT:    vpackssdw %xmm0, %xmm0, %xmm0
+; AVX12-NEXT:    vpackssdw %xmm0, %xmm0, %xmm0
+; AVX12-NEXT:    vpsllw $15, %xmm0, %xmm0
+; AVX12-NEXT:    vpacksswb %xmm0, %xmm0, %xmm0
+; AVX12-NEXT:    vpmovmskb %xmm0, %eax
+; AVX12-NEXT:    # kill: def $al killed $al killed $eax
+; AVX12-NEXT:    retq
+;
+; AVX512F-LABEL: v2i64_concat_undef:
+; AVX512F:       # %bb.0:
+; AVX512F-NEXT:    vptestnmq %xmm0, %xmm0, %k0
+; AVX512F-NEXT:    kmovw %k0, %eax
+; AVX512F-NEXT:    # kill: def $al killed $al killed $eax
+; AVX512F-NEXT:    retq
+;
+; AVX512BW-LABEL: v2i64_concat_undef:
+; AVX512BW:       # %bb.0:
+; AVX512BW-NEXT:    vptestnmq %xmm0, %xmm0, %k0
+; AVX512BW-NEXT:    kmovd %k0, %eax
+; AVX512BW-NEXT:    # kill: def $al killed $al killed $eax
+; AVX512BW-NEXT:    retq
+  %tobool = icmp eq <2 x i64> %vec, zeroinitializer
+  %insertvec = shufflevector <2 x i1> %tobool, <2 x i1> poison, <8 x i32> <i32 0, i32 1, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef>
+  %res = bitcast <8 x i1> %insertvec to i8
+  ret i8 %res
+}
+
+define i8 @v4f64_concat_undef(<4 x double> %vec) {
+; SSE2-SSSE3-LABEL: v4f64_concat_undef:
+; SSE2-SSSE3:       # %bb.0:
+; SSE2-SSSE3-NEXT:    xorpd %xmm2, %xmm2
+; SSE2-SSSE3-NEXT:    xorpd %xmm3, %xmm3
+; SSE2-SSSE3-NEXT:    cmpltpd %xmm1, %xmm3
+; SSE2-SSSE3-NEXT:    cmpltpd %xmm0, %xmm2
+; SSE2-SSSE3-NEXT:    packssdw %xmm3, %xmm2
+; SSE2-SSSE3-NEXT:    movmskps %xmm2, %eax
+; SSE2-SSSE3-NEXT:    # kill: def $al killed $al killed $eax
+; SSE2-SSSE3-NEXT:    retq
+;
+; AVX12-LABEL: v4f64_concat_undef:
+; AVX12:       # %bb.0:
+; AVX12-NEXT:    vxorpd %xmm1, %xmm1, %xmm1
+; AVX12-NEXT:    vcmpltpd %ymm0, %ymm1, %ymm0
+; AVX12-NEXT:    vmovmskpd %ymm0, %eax
+; AVX12-NEXT:    # kill: def $al killed $al killed $eax
+; AVX12-NEXT:    vzeroupper
+; AVX12-NEXT:    retq
+;
+; AVX512F-LABEL: v4f64_concat_undef:
+; AVX512F:       # %bb.0:
+; AVX512F-NEXT:    vxorpd %xmm1, %xmm1, %xmm1
+; AVX512F-NEXT:    vcmpltpd %ymm0, %ymm1, %k0
+; AVX512F-NEXT:    kmovw %k0, %eax
+; AVX512F-NEXT:    # kill: def $al killed $al killed $eax
+; AVX512F-NEXT:    vzeroupper
+; AVX512F-NEXT:    retq
+;
+; AVX512BW-LABEL: v4f64_concat_undef:
+; AVX512BW:       # %bb.0:
+; AVX512BW-NEXT:    vxorpd %xmm1, %xmm1, %xmm1
+; AVX512BW-NEXT:    vcmpltpd %ymm0, %ymm1, %k0
+; AVX512BW-NEXT:    kmovd %k0, %eax
+; AVX512BW-NEXT:    # kill: def $al killed $al killed $eax
+; AVX512BW-NEXT:    vzeroupper
+; AVX512BW-NEXT:    retq
+  %tobool = fcmp ogt <4 x double> %vec, zeroinitializer
+  %insertvec = shufflevector <4 x i1> %tobool, <4 x i1> poison, <8 x i32> <i32 0, i32 1, i32 2, i32 3, i32 undef, i32 undef, i32 undef, i32 undef>
+  %res = bitcast <8 x i1> %insertvec to i8
+  ret i8 %res
+}