diff --git a/llvm/lib/Target/X86/X86TargetTransformInfo.cpp b/llvm/lib/Target/X86/X86TargetTransformInfo.cpp
--- a/llvm/lib/Target/X86/X86TargetTransformInfo.cpp
+++ b/llvm/lib/Target/X86/X86TargetTransformInfo.cpp
@@ -5086,6 +5086,7 @@
       {4, MVT::v32i8, 80}, // (load 128i8 and) deinterleave into 4 x 32i8
 
       {4, MVT::v2i16, 6}, // (load 8i16 and) deinterleave into 4 x 2i16
+      {4, MVT::v4i16, 17}, // (load 16i16 and) deinterleave into 4 x 4i16
 
       {8, MVT::v8i32, 40} // (load 64i32 and) deinterleave into 8 x 8i32
   };
@@ -5112,6 +5113,7 @@
       {4, MVT::v32i8, 12}, // interleave 4 x 32i8 into 128i8 (and store)
 
       {4, MVT::v2i16, 2},  // interleave 4 x 2i16 into 8i16 (and store)
+      {4, MVT::v4i16, 6},  // interleave 4 x 4i16 into 16i16 (and store)
   };
 
   if (Opcode == Instruction::Load) {
diff --git a/llvm/test/Analysis/CostModel/X86/interleaved-load-i16-stride-4.ll b/llvm/test/Analysis/CostModel/X86/interleaved-load-i16-stride-4.ll
--- a/llvm/test/Analysis/CostModel/X86/interleaved-load-i16-stride-4.ll
+++ b/llvm/test/Analysis/CostModel/X86/interleaved-load-i16-stride-4.ll
@@ -10,7 +10,7 @@
 ; CHECK: LV: Checking a loop in "test"
 ; CHECK: LV: Found an estimated cost of 1 for VF 1 For instruction:   %v0 = load i16, i16* %in0, align 2
 ; CHECK: LV: Found an estimated cost of 7 for VF 2 For instruction:   %v0 = load i16, i16* %in0, align 2
-; CHECK: LV: Found an estimated cost of 41 for VF 4 For instruction:   %v0 = load i16, i16* %in0, align 2
+; CHECK: LV: Found an estimated cost of 18 for VF 4 For instruction:   %v0 = load i16, i16* %in0, align 2
 ; CHECK: LV: Found an estimated cost of 82 for VF 8 For instruction:   %v0 = load i16, i16* %in0, align 2
 ; CHECK: LV: Found an estimated cost of 228 for VF 16 For instruction:   %v0 = load i16, i16* %in0, align 2
 ; CHECK: LV: Found an estimated cost of 456 for VF 32 For instruction:   %v0 = load i16, i16* %in0, align 2
diff --git a/llvm/test/Analysis/CostModel/X86/interleaved-store-i16-stride-4.ll b/llvm/test/Analysis/CostModel/X86/interleaved-store-i16-stride-4.ll
--- a/llvm/test/Analysis/CostModel/X86/interleaved-store-i16-stride-4.ll
+++ b/llvm/test/Analysis/CostModel/X86/interleaved-store-i16-stride-4.ll
@@ -10,7 +10,7 @@
 ; CHECK: LV: Checking a loop in "test"
 ; CHECK: LV: Found an estimated cost of 1 for VF 1 For instruction:   store i16 %v3, i16* %out3, align 2
 ; CHECK: LV: Found an estimated cost of 3 for VF 2 For instruction:   store i16 %v3, i16* %out3, align 2
-; CHECK: LV: Found an estimated cost of 49 for VF 4 For instruction:   store i16 %v3, i16* %out3, align 2
+; CHECK: LV: Found an estimated cost of 7 for VF 4 For instruction:   store i16 %v3, i16* %out3, align 2
 ; CHECK: LV: Found an estimated cost of 98 for VF 8 For instruction:   store i16 %v3, i16* %out3, align 2
 ; CHECK: LV: Found an estimated cost of 228 for VF 16 For instruction:   store i16 %v3, i16* %out3, align 2
 ; CHECK: LV: Found an estimated cost of 456 for VF 32 For instruction:   store i16 %v3, i16* %out3, align 2