diff --git a/llvm/test/CodeGen/X86/avx-insertelt.ll b/llvm/test/CodeGen/X86/avx-insertelt.ll
index e828627d843e94..2229f6aa6c7694 100644
--- a/llvm/test/CodeGen/X86/avx-insertelt.ll
+++ b/llvm/test/CodeGen/X86/avx-insertelt.ll
@@ -2,8 +2,10 @@
 ; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=+avx  | FileCheck %s --check-prefix=ALL --check-prefix=AVX
 ; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=+avx2 | FileCheck %s --check-prefix=ALL --check-prefix=AVX2
 
-define <8 x float> @insert_f32(<8 x float> %y, float %f, <8 x float> %x) {
-; ALL-LABEL: insert_f32:
+; 0'th element insertion into an AVX register.
+
+define <8 x float> @insert_f32_firstelt_of_low_subvector(<8 x float> %y, float %f, <8 x float> %x) {
+; ALL-LABEL: insert_f32_firstelt_of_low_subvector:
 ; ALL:       # %bb.0:
 ; ALL-NEXT:    # kill: def $xmm1 killed $xmm1 def $ymm1
 ; ALL-NEXT:    vblendps {{.*#+}} ymm0 = ymm1[0],ymm0[1,2,3,4,5,6,7]
@@ -12,8 +14,8 @@ define <8 x float> @insert_f32(<8 x float> %y, float %f, <8 x float> %x) {
   ret <8 x float> %i0
 }
 
-define <4 x double> @insert_f64(<4 x double> %y, double %f, <4 x double> %x) {
-; ALL-LABEL: insert_f64:
+define <4 x double> @insert_f64_firstelt_of_low_subvector(<4 x double> %y, double %f, <4 x double> %x) {
+; ALL-LABEL: insert_f64_firstelt_of_low_subvector:
 ; ALL:       # %bb.0:
 ; ALL-NEXT:    # kill: def $xmm1 killed $xmm1 def $ymm1
 ; ALL-NEXT:    vblendps {{.*#+}} ymm0 = ymm1[0,1],ymm0[2,3,4,5,6,7]
@@ -22,14 +24,14 @@ define <4 x double> @insert_f64(<4 x double> %y, double %f, <4 x double> %x) {
   ret <4 x double> %i0
 }
 
-define <32 x i8> @insert_i8(<32 x i8> %y, i8 %f, <32 x i8> %x) {
-; AVX-LABEL: insert_i8:
+define <32 x i8> @insert_i8_firstelt_of_low_subvector(<32 x i8> %y, i8 %f, <32 x i8> %x) {
+; AVX-LABEL: insert_i8_firstelt_of_low_subvector:
 ; AVX:       # %bb.0:
 ; AVX-NEXT:    vpinsrb $0, %edi, %xmm0, %xmm1
 ; AVX-NEXT:    vblendps {{.*#+}} ymm0 = ymm1[0,1,2,3],ymm0[4,5,6,7]
 ; AVX-NEXT:    retq
 ;
-; AVX2-LABEL: insert_i8:
+; AVX2-LABEL: insert_i8_firstelt_of_low_subvector:
 ; AVX2:       # %bb.0:
 ; AVX2-NEXT:    vpinsrb $0, %edi, %xmm0, %xmm1
 ; AVX2-NEXT:    vpblendd {{.*#+}} ymm0 = ymm1[0,1,2,3],ymm0[4,5,6,7]
@@ -38,14 +40,14 @@ define <32 x i8> @insert_i8(<32 x i8> %y, i8 %f, <32 x i8> %x) {
   ret <32 x i8> %i0
 }
 
-define <16 x i16> @insert_i16(<16 x i16> %y, i16 %f, <16 x i16> %x) {
-; AVX-LABEL: insert_i16:
+define <16 x i16> @insert_i16_firstelt_of_low_subvector(<16 x i16> %y, i16 %f, <16 x i16> %x) {
+; AVX-LABEL: insert_i16_firstelt_of_low_subvector:
 ; AVX:       # %bb.0:
 ; AVX-NEXT:    vpinsrw $0, %edi, %xmm0, %xmm1
 ; AVX-NEXT:    vblendps {{.*#+}} ymm0 = ymm1[0,1,2,3],ymm0[4,5,6,7]
 ; AVX-NEXT:    retq
 ;
-; AVX2-LABEL: insert_i16:
+; AVX2-LABEL: insert_i16_firstelt_of_low_subvector:
 ; AVX2:       # %bb.0:
 ; AVX2-NEXT:    vpinsrw $0, %edi, %xmm0, %xmm1
 ; AVX2-NEXT:    vpblendd {{.*#+}} ymm0 = ymm1[0,1,2,3],ymm0[4,5,6,7]
@@ -54,14 +56,14 @@ define <16 x i16> @insert_i16(<16 x i16> %y, i16 %f, <16 x i16> %x) {
   ret <16 x i16> %i0
 }
 
-define <8 x i32> @insert_i32(<8 x i32> %y, i32 %f, <8 x i32> %x) {
-; AVX-LABEL: insert_i32:
+define <8 x i32> @insert_i32_firstelt_of_low_subvector(<8 x i32> %y, i32 %f, <8 x i32> %x) {
+; AVX-LABEL: insert_i32_firstelt_of_low_subvector:
 ; AVX:       # %bb.0:
 ; AVX-NEXT:    vpinsrd $0, %edi, %xmm0, %xmm1
 ; AVX-NEXT:    vblendps {{.*#+}} ymm0 = ymm1[0,1,2,3],ymm0[4,5,6,7]
 ; AVX-NEXT:    retq
 ;
-; AVX2-LABEL: insert_i32:
+; AVX2-LABEL: insert_i32_firstelt_of_low_subvector:
 ; AVX2:       # %bb.0:
 ; AVX2-NEXT:    vmovd %edi, %xmm1
 ; AVX2-NEXT:    vpblendd {{.*#+}} ymm0 = ymm1[0],ymm0[1,2,3,4,5,6,7]
@@ -70,14 +72,14 @@ define <8 x i32> @insert_i32(<8 x i32> %y, i32 %f, <8 x i32> %x) {
   ret <8 x i32> %i0
 }
 
-define <4 x i64> @insert_i64(<4 x i64> %y, i64 %f, <4 x i64> %x) {
-; AVX-LABEL: insert_i64:
+define <4 x i64> @insert_i64_firstelt_of_low_subvector(<4 x i64> %y, i64 %f, <4 x i64> %x) {
+; AVX-LABEL: insert_i64_firstelt_of_low_subvector:
 ; AVX:       # %bb.0:
 ; AVX-NEXT:    vpinsrq $0, %rdi, %xmm0, %xmm1
 ; AVX-NEXT:    vblendps {{.*#+}} ymm0 = ymm1[0,1,2,3],ymm0[4,5,6,7]
 ; AVX-NEXT:    retq
 ;
-; AVX2-LABEL: insert_i64:
+; AVX2-LABEL: insert_i64_firstelt_of_low_subvector:
 ; AVX2:       # %bb.0:
 ; AVX2-NEXT:    vpinsrq $0, %rdi, %xmm0, %xmm1
 ; AVX2-NEXT:    vpblendd {{.*#+}} ymm0 = ymm1[0,1,2,3],ymm0[4,5,6,7]
@@ -86,3 +88,419 @@ define <4 x i64> @insert_i64(<4 x i64> %y, i64 %f, <4 x i64> %x) {
   ret <4 x i64> %i0
 }
 
+; 0'th element of high subvector insertion into an AVX register.
+
+define <8 x float> @insert_f32_firstelt_of_high_subvector(<8 x float> %y, float %f, <8 x float> %x) {
+; ALL-LABEL: insert_f32_firstelt_of_high_subvector:
+; ALL:       # %bb.0:
+; ALL-NEXT:    vextractf128 $1, %ymm0, %xmm2
+; ALL-NEXT:    vblendps {{.*#+}} xmm1 = xmm1[0],xmm2[1,2,3]
+; ALL-NEXT:    vinsertf128 $1, %xmm1, %ymm0, %ymm0
+; ALL-NEXT:    retq
+  %i0 = insertelement <8 x float> %y, float %f, i32 4
+  ret <8 x float> %i0
+}
+
+define <4 x double> @insert_f64_firstelt_of_high_subvector(<4 x double> %y, double %f, <4 x double> %x) {
+; ALL-LABEL: insert_f64_firstelt_of_high_subvector:
+; ALL:       # %bb.0:
+; ALL-NEXT:    vextractf128 $1, %ymm0, %xmm2
+; ALL-NEXT:    vblendps {{.*#+}} xmm1 = xmm1[0,1],xmm2[2,3]
+; ALL-NEXT:    vinsertf128 $1, %xmm1, %ymm0, %ymm0
+; ALL-NEXT:    retq
+  %i0 = insertelement <4 x double> %y, double %f, i32 2
+  ret <4 x double> %i0
+}
+
+define <32 x i8> @insert_i8_firstelt_of_high_subvector(<32 x i8> %y, i8 %f, <32 x i8> %x) {
+; AVX-LABEL: insert_i8_firstelt_of_high_subvector:
+; AVX:       # %bb.0:
+; AVX-NEXT:    vextractf128 $1, %ymm0, %xmm1
+; AVX-NEXT:    vpinsrb $0, %edi, %xmm1, %xmm1
+; AVX-NEXT:    vinsertf128 $1, %xmm1, %ymm0, %ymm0
+; AVX-NEXT:    retq
+;
+; AVX2-LABEL: insert_i8_firstelt_of_high_subvector:
+; AVX2:       # %bb.0:
+; AVX2-NEXT:    vextracti128 $1, %ymm0, %xmm1
+; AVX2-NEXT:    vpinsrb $0, %edi, %xmm1, %xmm1
+; AVX2-NEXT:    vinserti128 $1, %xmm1, %ymm0, %ymm0
+; AVX2-NEXT:    retq
+  %i0 = insertelement <32 x i8> %y, i8 %f, i32 16
+  ret <32 x i8> %i0
+}
+
+define <16 x i16> @insert_i16_firstelt_of_high_subvector(<16 x i16> %y, i16 %f, <16 x i16> %x) {
+; AVX-LABEL: insert_i16_firstelt_of_high_subvector:
+; AVX:       # %bb.0:
+; AVX-NEXT:    vextractf128 $1, %ymm0, %xmm1
+; AVX-NEXT:    vpinsrw $0, %edi, %xmm1, %xmm1
+; AVX-NEXT:    vinsertf128 $1, %xmm1, %ymm0, %ymm0
+; AVX-NEXT:    retq
+;
+; AVX2-LABEL: insert_i16_firstelt_of_high_subvector:
+; AVX2:       # %bb.0:
+; AVX2-NEXT:    vextracti128 $1, %ymm0, %xmm1
+; AVX2-NEXT:    vpinsrw $0, %edi, %xmm1, %xmm1
+; AVX2-NEXT:    vinserti128 $1, %xmm1, %ymm0, %ymm0
+; AVX2-NEXT:    retq
+  %i0 = insertelement <16 x i16> %y, i16 %f, i32 8
+  ret <16 x i16> %i0
+}
+
+define <8 x i32> @insert_i32_firstelt_of_high_subvector(<8 x i32> %y, i32 %f, <8 x i32> %x) {
+; AVX-LABEL: insert_i32_firstelt_of_high_subvector:
+; AVX:       # %bb.0:
+; AVX-NEXT:    vextractf128 $1, %ymm0, %xmm1
+; AVX-NEXT:    vpinsrd $0, %edi, %xmm1, %xmm1
+; AVX-NEXT:    vinsertf128 $1, %xmm1, %ymm0, %ymm0
+; AVX-NEXT:    retq
+;
+; AVX2-LABEL: insert_i32_firstelt_of_high_subvector:
+; AVX2:       # %bb.0:
+; AVX2-NEXT:    vextracti128 $1, %ymm0, %xmm1
+; AVX2-NEXT:    vpinsrd $0, %edi, %xmm1, %xmm1
+; AVX2-NEXT:    vinserti128 $1, %xmm1, %ymm0, %ymm0
+; AVX2-NEXT:    retq
+  %i0 = insertelement <8 x i32> %y, i32 %f, i32 4
+  ret <8 x i32> %i0
+}
+
+define <4 x i64> @insert_i64_firstelt_of_high_subvector(<4 x i64> %y, i64 %f, <4 x i64> %x) {
+; AVX-LABEL: insert_i64_firstelt_of_high_subvector:
+; AVX:       # %bb.0:
+; AVX-NEXT:    vextractf128 $1, %ymm0, %xmm1
+; AVX-NEXT:    vpinsrq $0, %rdi, %xmm1, %xmm1
+; AVX-NEXT:    vinsertf128 $1, %xmm1, %ymm0, %ymm0
+; AVX-NEXT:    retq
+;
+; AVX2-LABEL: insert_i64_firstelt_of_high_subvector:
+; AVX2:       # %bb.0:
+; AVX2-NEXT:    vextracti128 $1, %ymm0, %xmm1
+; AVX2-NEXT:    vpinsrq $0, %rdi, %xmm1, %xmm1
+; AVX2-NEXT:    vinserti128 $1, %xmm1, %ymm0, %ymm0
+; AVX2-NEXT:    retq
+  %i0 = insertelement <4 x i64> %y, i64 %f, i32 2
+  ret <4 x i64> %i0
+}
+
+; element insertion into 0'th element of both subvectors
+
+define <8 x float> @insert_f32_firstelts(<8 x float> %y, float %f, <8 x float> %x) {
+; ALL-LABEL: insert_f32_firstelts:
+; ALL:       # %bb.0:
+; ALL-NEXT:    vblendps {{.*#+}} xmm2 = xmm1[0],xmm0[1,2,3]
+; ALL-NEXT:    vextractf128 $1, %ymm0, %xmm0
+; ALL-NEXT:    vblendps {{.*#+}} xmm0 = xmm1[0],xmm0[1,2,3]
+; ALL-NEXT:    vinsertf128 $1, %xmm0, %ymm2, %ymm0
+; ALL-NEXT:    retq
+  %i0 = insertelement <8 x float> %y, float %f, i32 0
+  %i1 = insertelement <8 x float> %i0, float %f, i32 4
+  ret <8 x float> %i1
+}
+
+define <4 x double> @insert_f64_firstelts(<4 x double> %y, double %f, <4 x double> %x) {
+; ALL-LABEL: insert_f64_firstelts:
+; ALL:       # %bb.0:
+; ALL-NEXT:    vblendps {{.*#+}} xmm2 = xmm1[0,1],xmm0[2,3]
+; ALL-NEXT:    vextractf128 $1, %ymm0, %xmm0
+; ALL-NEXT:    vblendps {{.*#+}} xmm0 = xmm1[0,1],xmm0[2,3]
+; ALL-NEXT:    vinsertf128 $1, %xmm0, %ymm2, %ymm0
+; ALL-NEXT:    retq
+  %i0 = insertelement <4 x double> %y, double %f, i32 0
+  %i1 = insertelement <4 x double> %i0, double %f, i32 2
+  ret <4 x double> %i1
+}
+
+define <32 x i8> @insert_i8_firstelts(<32 x i8> %y, i8 %f, <32 x i8> %x) {
+; AVX-LABEL: insert_i8_firstelts:
+; AVX:       # %bb.0:
+; AVX-NEXT:    vpinsrb $0, %edi, %xmm0, %xmm1
+; AVX-NEXT:    vextractf128 $1, %ymm0, %xmm0
+; AVX-NEXT:    vpinsrb $0, %edi, %xmm0, %xmm0
+; AVX-NEXT:    vinsertf128 $1, %xmm0, %ymm1, %ymm0
+; AVX-NEXT:    retq
+;
+; AVX2-LABEL: insert_i8_firstelts:
+; AVX2:       # %bb.0:
+; AVX2-NEXT:    vpinsrb $0, %edi, %xmm0, %xmm1
+; AVX2-NEXT:    vextracti128 $1, %ymm0, %xmm0
+; AVX2-NEXT:    vpinsrb $0, %edi, %xmm0, %xmm0
+; AVX2-NEXT:    vinserti128 $1, %xmm0, %ymm1, %ymm0
+; AVX2-NEXT:    retq
+  %i0 = insertelement <32 x i8> %y, i8 %f, i32 0
+  %i1 = insertelement <32 x i8> %i0, i8 %f, i32 16
+  ret <32 x i8> %i1
+}
+
+define <16 x i16> @insert_i16_firstelts(<16 x i16> %y, i16 %f, <16 x i16> %x) {
+; AVX-LABEL: insert_i16_firstelts:
+; AVX:       # %bb.0:
+; AVX-NEXT:    vpinsrw $0, %edi, %xmm0, %xmm1
+; AVX-NEXT:    vextractf128 $1, %ymm0, %xmm0
+; AVX-NEXT:    vpinsrw $0, %edi, %xmm0, %xmm0
+; AVX-NEXT:    vinsertf128 $1, %xmm0, %ymm1, %ymm0
+; AVX-NEXT:    retq
+;
+; AVX2-LABEL: insert_i16_firstelts:
+; AVX2:       # %bb.0:
+; AVX2-NEXT:    vpinsrw $0, %edi, %xmm0, %xmm1
+; AVX2-NEXT:    vextracti128 $1, %ymm0, %xmm0
+; AVX2-NEXT:    vpinsrw $0, %edi, %xmm0, %xmm0
+; AVX2-NEXT:    vinserti128 $1, %xmm0, %ymm1, %ymm0
+; AVX2-NEXT:    retq
+  %i0 = insertelement <16 x i16> %y, i16 %f, i32 0
+  %i1 = insertelement <16 x i16> %i0, i16 %f, i32 8
+  ret <16 x i16> %i1
+}
+
+define <8 x i32> @insert_i32_firstelts(<8 x i32> %y, i32 %f, <8 x i32> %x) {
+; AVX-LABEL: insert_i32_firstelts:
+; AVX:       # %bb.0:
+; AVX-NEXT:    vpinsrd $0, %edi, %xmm0, %xmm1
+; AVX-NEXT:    vextractf128 $1, %ymm0, %xmm0
+; AVX-NEXT:    vpinsrd $0, %edi, %xmm0, %xmm0
+; AVX-NEXT:    vinsertf128 $1, %xmm0, %ymm1, %ymm0
+; AVX-NEXT:    retq
+;
+; AVX2-LABEL: insert_i32_firstelts:
+; AVX2:       # %bb.0:
+; AVX2-NEXT:    vmovd %edi, %xmm1
+; AVX2-NEXT:    vpblendd {{.*#+}} xmm1 = xmm1[0],xmm0[1,2,3]
+; AVX2-NEXT:    vextracti128 $1, %ymm0, %xmm0
+; AVX2-NEXT:    vpinsrd $0, %edi, %xmm0, %xmm0
+; AVX2-NEXT:    vinserti128 $1, %xmm0, %ymm1, %ymm0
+; AVX2-NEXT:    retq
+  %i0 = insertelement <8 x i32> %y, i32 %f, i32 0
+  %i1 = insertelement <8 x i32> %i0, i32 %f, i32 4
+  ret <8 x i32> %i1
+}
+
+define <4 x i64> @insert_i64_firstelts(<4 x i64> %y, i64 %f, <4 x i64> %x) {
+; AVX-LABEL: insert_i64_firstelts:
+; AVX:       # %bb.0:
+; AVX-NEXT:    vpinsrq $0, %rdi, %xmm0, %xmm1
+; AVX-NEXT:    vextractf128 $1, %ymm0, %xmm0
+; AVX-NEXT:    vpinsrq $0, %rdi, %xmm0, %xmm0
+; AVX-NEXT:    vinsertf128 $1, %xmm0, %ymm1, %ymm0
+; AVX-NEXT:    retq
+;
+; AVX2-LABEL: insert_i64_firstelts:
+; AVX2:       # %bb.0:
+; AVX2-NEXT:    vpinsrq $0, %rdi, %xmm0, %xmm1
+; AVX2-NEXT:    vextracti128 $1, %ymm0, %xmm0
+; AVX2-NEXT:    vpinsrq $0, %rdi, %xmm0, %xmm0
+; AVX2-NEXT:    vinserti128 $1, %xmm0, %ymm1, %ymm0
+; AVX2-NEXT:    retq
+  %i0 = insertelement <4 x i64> %y, i64 %f, i32 0
+  %i1 = insertelement <4 x i64> %i0, i64 %f, i32 2
+  ret <4 x i64> %i1
+}
+
+; element insertion into two elements of high subvector
+
+define <8 x float> @insert_f32_two_elts_of_high_subvector(<8 x float> %y, float %f, <8 x float> %x) {
+; ALL-LABEL: insert_f32_two_elts_of_high_subvector:
+; ALL:       # %bb.0:
+; ALL-NEXT:    vextractf128 $1, %ymm0, %xmm2
+; ALL-NEXT:    vshufps {{.*#+}} xmm1 = xmm1[0,0],xmm2[2,3]
+; ALL-NEXT:    vinsertf128 $1, %xmm1, %ymm0, %ymm0
+; ALL-NEXT:    retq
+  %i0 = insertelement <8 x float> %y, float %f, i32 4
+  %i1 = insertelement <8 x float> %i0, float %f, i32 5
+  ret <8 x float> %i1
+}
+
+define <4 x double> @insert_f64_two_elts_of_high_subvector(<4 x double> %y, double %f, <4 x double> %x) {
+; ALL-LABEL: insert_f64_two_elts_of_high_subvector:
+; ALL:       # %bb.0:
+; ALL-NEXT:    vmovddup {{.*#+}} xmm1 = xmm1[0,0]
+; ALL-NEXT:    vinsertf128 $1, %xmm1, %ymm0, %ymm0
+; ALL-NEXT:    retq
+  %i0 = insertelement <4 x double> %y, double %f, i32 2
+  %i1 = insertelement <4 x double> %i0, double %f, i32 3
+  ret <4 x double> %i1
+}
+
+define <32 x i8> @insert_i8_two_elts_of_high_subvector(<32 x i8> %y, i8 %f, <32 x i8> %x) {
+; AVX-LABEL: insert_i8_two_elts_of_high_subvector:
+; AVX:       # %bb.0:
+; AVX-NEXT:    vextractf128 $1, %ymm0, %xmm1
+; AVX-NEXT:    vpinsrb $0, %edi, %xmm1, %xmm1
+; AVX-NEXT:    vpinsrb $1, %edi, %xmm1, %xmm1
+; AVX-NEXT:    vinsertf128 $1, %xmm1, %ymm0, %ymm0
+; AVX-NEXT:    retq
+;
+; AVX2-LABEL: insert_i8_two_elts_of_high_subvector:
+; AVX2:       # %bb.0:
+; AVX2-NEXT:    vextracti128 $1, %ymm0, %xmm1
+; AVX2-NEXT:    vpinsrb $0, %edi, %xmm1, %xmm1
+; AVX2-NEXT:    vpinsrb $1, %edi, %xmm1, %xmm1
+; AVX2-NEXT:    vinserti128 $1, %xmm1, %ymm0, %ymm0
+; AVX2-NEXT:    retq
+  %i0 = insertelement <32 x i8> %y, i8 %f, i32 16
+  %i1 = insertelement <32 x i8> %i0, i8 %f, i32 17
+  ret <32 x i8> %i1
+}
+
+define <16 x i16> @insert_i16_two_elts_of_high_subvector(<16 x i16> %y, i16 %f, <16 x i16> %x) {
+; AVX-LABEL: insert_i16_two_elts_of_high_subvector:
+; AVX:       # %bb.0:
+; AVX-NEXT:    vextractf128 $1, %ymm0, %xmm1
+; AVX-NEXT:    vpinsrw $0, %edi, %xmm1, %xmm1
+; AVX-NEXT:    vpinsrw $1, %edi, %xmm1, %xmm1
+; AVX-NEXT:    vinsertf128 $1, %xmm1, %ymm0, %ymm0
+; AVX-NEXT:    retq
+;
+; AVX2-LABEL: insert_i16_two_elts_of_high_subvector:
+; AVX2:       # %bb.0:
+; AVX2-NEXT:    vextracti128 $1, %ymm0, %xmm1
+; AVX2-NEXT:    vpinsrw $0, %edi, %xmm1, %xmm1
+; AVX2-NEXT:    vpinsrw $1, %edi, %xmm1, %xmm1
+; AVX2-NEXT:    vinserti128 $1, %xmm1, %ymm0, %ymm0
+; AVX2-NEXT:    retq
+  %i0 = insertelement <16 x i16> %y, i16 %f, i32 8
+  %i1 = insertelement <16 x i16> %i0, i16 %f, i32 9
+  ret <16 x i16> %i1
+}
+
+define <8 x i32> @insert_i32_two_elts_of_high_subvector(<8 x i32> %y, i32 %f, <8 x i32> %x) {
+; AVX-LABEL: insert_i32_two_elts_of_high_subvector:
+; AVX:       # %bb.0:
+; AVX-NEXT:    vextractf128 $1, %ymm0, %xmm1
+; AVX-NEXT:    vpinsrd $0, %edi, %xmm1, %xmm1
+; AVX-NEXT:    vpinsrd $1, %edi, %xmm1, %xmm1
+; AVX-NEXT:    vinsertf128 $1, %xmm1, %ymm0, %ymm0
+; AVX-NEXT:    retq
+;
+; AVX2-LABEL: insert_i32_two_elts_of_high_subvector:
+; AVX2:       # %bb.0:
+; AVX2-NEXT:    vextracti128 $1, %ymm0, %xmm1
+; AVX2-NEXT:    vpinsrd $0, %edi, %xmm1, %xmm1
+; AVX2-NEXT:    vpinsrd $1, %edi, %xmm1, %xmm1
+; AVX2-NEXT:    vinserti128 $1, %xmm1, %ymm0, %ymm0
+; AVX2-NEXT:    retq
+  %i0 = insertelement <8 x i32> %y, i32 %f, i32 4
+  %i1 = insertelement <8 x i32> %i0, i32 %f, i32 5
+  ret <8 x i32> %i1
+}
+
+define <4 x i64> @insert_i64_two_elts_of_high_subvector(<4 x i64> %y, i64 %f, <4 x i64> %x) {
+; AVX-LABEL: insert_i64_two_elts_of_high_subvector:
+; AVX:       # %bb.0:
+; AVX-NEXT:    vpinsrq $0, %rdi, %xmm0, %xmm1
+; AVX-NEXT:    vpinsrq $1, %rdi, %xmm1, %xmm1
+; AVX-NEXT:    vinsertf128 $1, %xmm1, %ymm0, %ymm0
+; AVX-NEXT:    retq
+;
+; AVX2-LABEL: insert_i64_two_elts_of_high_subvector:
+; AVX2:       # %bb.0:
+; AVX2-NEXT:    vpinsrq $0, %rdi, %xmm0, %xmm1
+; AVX2-NEXT:    vpinsrq $1, %rdi, %xmm1, %xmm1
+; AVX2-NEXT:    vinserti128 $1, %xmm1, %ymm0, %ymm0
+; AVX2-NEXT:    retq
+  %i0 = insertelement <4 x i64> %y, i64 %f, i32 2
+  %i1 = insertelement <4 x i64> %i0, i64 %f, i32 3
+  ret <4 x i64> %i1
+}
+
+; element insertion into two elements of low subvector
+
+define <8 x float> @insert_f32_two_elts_of_low_subvector(<8 x float> %y, float %f, <8 x float> %x) {
+; ALL-LABEL: insert_f32_two_elts_of_low_subvector:
+; ALL:       # %bb.0:
+; ALL-NEXT:    vshufps {{.*#+}} xmm1 = xmm1[0,0],xmm0[2,3]
+; ALL-NEXT:    vblendps {{.*#+}} ymm0 = ymm1[0,1,2,3],ymm0[4,5,6,7]
+; ALL-NEXT:    retq
+  %i0 = insertelement <8 x float> %y, float %f, i32 0
+  %i1 = insertelement <8 x float> %i0, float %f, i32 1
+  ret <8 x float> %i1
+}
+
+define <4 x double> @insert_f64_two_elts_of_low_subvector(<4 x double> %y, double %f, <4 x double> %x) {
+; ALL-LABEL: insert_f64_two_elts_of_low_subvector:
+; ALL:       # %bb.0:
+; ALL-NEXT:    vmovddup {{.*#+}} xmm1 = xmm1[0,0]
+; ALL-NEXT:    vblendps {{.*#+}} ymm0 = ymm1[0,1,2,3],ymm0[4,5,6,7]
+; ALL-NEXT:    retq
+  %i0 = insertelement <4 x double> %y, double %f, i32 0
+  %i1 = insertelement <4 x double> %i0, double %f, i32 1
+  ret <4 x double> %i1
+}
+
+define <32 x i8> @insert_i8_two_elts_of_low_subvector(<32 x i8> %y, i8 %f, <32 x i8> %x) {
+; AVX-LABEL: insert_i8_two_elts_of_low_subvector:
+; AVX:       # %bb.0:
+; AVX-NEXT:    vpinsrb $0, %edi, %xmm0, %xmm1
+; AVX-NEXT:    vpinsrb $1, %edi, %xmm1, %xmm1
+; AVX-NEXT:    vblendps {{.*#+}} ymm0 = ymm1[0,1,2,3],ymm0[4,5,6,7]
+; AVX-NEXT:    retq
+;
+; AVX2-LABEL: insert_i8_two_elts_of_low_subvector:
+; AVX2:       # %bb.0:
+; AVX2-NEXT:    vpinsrb $0, %edi, %xmm0, %xmm1
+; AVX2-NEXT:    vpinsrb $1, %edi, %xmm1, %xmm1
+; AVX2-NEXT:    vpblendd {{.*#+}} ymm0 = ymm1[0,1,2,3],ymm0[4,5,6,7]
+; AVX2-NEXT:    retq
+  %i0 = insertelement <32 x i8> %y, i8 %f, i32 0
+  %i1 = insertelement <32 x i8> %i0, i8 %f, i32 1
+  ret <32 x i8> %i1
+}
+
+define <16 x i16> @insert_i16_two_elts_of_low_subvector(<16 x i16> %y, i16 %f, <16 x i16> %x) {
+; AVX-LABEL: insert_i16_two_elts_of_low_subvector:
+; AVX:       # %bb.0:
+; AVX-NEXT:    vpinsrw $0, %edi, %xmm0, %xmm1
+; AVX-NEXT:    vpinsrw $1, %edi, %xmm1, %xmm1
+; AVX-NEXT:    vblendps {{.*#+}} ymm0 = ymm1[0,1,2,3],ymm0[4,5,6,7]
+; AVX-NEXT:    retq
+;
+; AVX2-LABEL: insert_i16_two_elts_of_low_subvector:
+; AVX2:       # %bb.0:
+; AVX2-NEXT:    vpinsrw $0, %edi, %xmm0, %xmm1
+; AVX2-NEXT:    vpinsrw $1, %edi, %xmm1, %xmm1
+; AVX2-NEXT:    vpblendd {{.*#+}} ymm0 = ymm1[0,1,2,3],ymm0[4,5,6,7]
+; AVX2-NEXT:    retq
+  %i0 = insertelement <16 x i16> %y, i16 %f, i32 0
+  %i1 = insertelement <16 x i16> %i0, i16 %f, i32 1
+  ret <16 x i16> %i1
+}
+
+define <8 x i32> @insert_i32_two_elts_of_low_subvector(<8 x i32> %y, i32 %f, <8 x i32> %x) {
+; AVX-LABEL: insert_i32_two_elts_of_low_subvector:
+; AVX:       # %bb.0:
+; AVX-NEXT:    vpinsrd $0, %edi, %xmm0, %xmm1
+; AVX-NEXT:    vpinsrd $1, %edi, %xmm1, %xmm1
+; AVX-NEXT:    vblendps {{.*#+}} ymm0 = ymm1[0,1,2,3],ymm0[4,5,6,7]
+; AVX-NEXT:    retq
+;
+; AVX2-LABEL: insert_i32_two_elts_of_low_subvector:
+; AVX2:       # %bb.0:
+; AVX2-NEXT:    vmovd %edi, %xmm1
+; AVX2-NEXT:    vpblendd {{.*#+}} xmm1 = xmm1[0],xmm0[1,2,3]
+; AVX2-NEXT:    vpinsrd $1, %edi, %xmm1, %xmm1
+; AVX2-NEXT:    vpblendd {{.*#+}} ymm0 = ymm1[0,1,2,3],ymm0[4,5,6,7]
+; AVX2-NEXT:    retq
+  %i0 = insertelement <8 x i32> %y, i32 %f, i32 0
+  %i1 = insertelement <8 x i32> %i0, i32 %f, i32 1
+  ret <8 x i32> %i1
+}
+
+define <4 x i64> @insert_i64_two_elts_of_low_subvector(<4 x i64> %y, i64 %f, <4 x i64> %x) {
+; AVX-LABEL: insert_i64_two_elts_of_low_subvector:
+; AVX:       # %bb.0:
+; AVX-NEXT:    vpinsrq $0, %rdi, %xmm0, %xmm1
+; AVX-NEXT:    vpinsrq $1, %rdi, %xmm1, %xmm1
+; AVX-NEXT:    vblendps {{.*#+}} ymm0 = ymm1[0,1,2,3],ymm0[4,5,6,7]
+; AVX-NEXT:    retq
+;
+; AVX2-LABEL: insert_i64_two_elts_of_low_subvector:
+; AVX2:       # %bb.0:
+; AVX2-NEXT:    vpinsrq $0, %rdi, %xmm0, %xmm1
+; AVX2-NEXT:    vpinsrq $1, %rdi, %xmm1, %xmm1
+; AVX2-NEXT:    vpblendd {{.*#+}} ymm0 = ymm1[0,1,2,3],ymm0[4,5,6,7]
+; AVX2-NEXT:    retq
+  %i0 = insertelement <4 x i64> %y, i64 %f, i32 0
+  %i1 = insertelement <4 x i64> %i0, i64 %f, i32 1
+  ret <4 x i64> %i1
+}