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
@@ -5075,6 +5075,7 @@
       {2, MVT::v16i16, 9}, // (load 32i16 and) deinterleave into 2 x 16i16
       {2, MVT::v32i16, 18}, // (load 64i16 and) deinterleave into 2 x 32i16
 
+      {2, MVT::v2i64, 2}, // (load 4i64 and) deinterleave into 2 x 2i64
       {2, MVT::v4i64, 6}, // (load 8i64 and) deinterleave into 2 x 4i64
 
       {3, MVT::v2i8, 10},  // (load 6i8 and) deinterleave into 3 x 2i8
@@ -5118,6 +5119,7 @@
       {2, MVT::v16i16, 4}, // interleave 2 x 16i16 into 32i16 (and store)
       {2, MVT::v32i16, 8}, // interleave 2 x 32i16 into 64i16 (and store)
 
+      {2, MVT::v2i64, 2}, // interleave 2 x 2i64 into 4i64 (and store)
       {2, MVT::v4i64, 6}, // interleave 2 x 4i64 into 8i64 (and store)
 
       {3, MVT::v2i8, 7},   // interleave 3 x 2i8 into 6i8 (and store)
diff --git a/llvm/test/Analysis/CostModel/X86/interleaved-load-f64-stride-2.ll b/llvm/test/Analysis/CostModel/X86/interleaved-load-f64-stride-2.ll
--- a/llvm/test/Analysis/CostModel/X86/interleaved-load-f64-stride-2.ll
+++ b/llvm/test/Analysis/CostModel/X86/interleaved-load-f64-stride-2.ll
@@ -24,7 +24,7 @@
 ; AVX1: LV: Found an estimated cost of 64 for VF 16 For instruction:   %v0 = load double, double* %in0, align 8
 ;;
 ; AVX2: LV: Found an estimated cost of 1 for VF 1 For instruction:   %v0 = load double, double* %in0, align 8
-; AVX2: LV: Found an estimated cost of 7 for VF 2 For instruction:   %v0 = load double, double* %in0, align 8
+; AVX2: LV: Found an estimated cost of 3 for VF 2 For instruction:   %v0 = load double, double* %in0, align 8
 ; AVX2: LV: Found an estimated cost of 8 for VF 4 For instruction:   %v0 = load double, double* %in0, align 8
 ; AVX2: LV: Found an estimated cost of 32 for VF 8 For instruction:   %v0 = load double, double* %in0, align 8
 ; AVX2: LV: Found an estimated cost of 64 for VF 16 For instruction:   %v0 = load double, double* %in0, align 8
diff --git a/llvm/test/Analysis/CostModel/X86/interleaved-load-i64-stride-2.ll b/llvm/test/Analysis/CostModel/X86/interleaved-load-i64-stride-2.ll
--- a/llvm/test/Analysis/CostModel/X86/interleaved-load-i64-stride-2.ll
+++ b/llvm/test/Analysis/CostModel/X86/interleaved-load-i64-stride-2.ll
@@ -24,7 +24,7 @@
 ; AVX1: LV: Found an estimated cost of 104 for VF 16 For instruction:   %v0 = load i64, i64* %in0, align 8
 ;
 ; AVX2: LV: Found an estimated cost of 1 for VF 1 For instruction:   %v0 = load i64, i64* %in0, align 8
-; AVX2: LV: Found an estimated cost of 11 for VF 2 For instruction:   %v0 = load i64, i64* %in0, align 8
+; AVX2: LV: Found an estimated cost of 3 for VF 2 For instruction:   %v0 = load i64, i64* %in0, align 8
 ; AVX2: LV: Found an estimated cost of 8 for VF 4 For instruction:   %v0 = load i64, i64* %in0, align 8
 ; AVX2: LV: Found an estimated cost of 52 for VF 8 For instruction:   %v0 = load i64, i64* %in0, align 8
 ; AVX2: LV: Found an estimated cost of 104 for VF 16 For instruction:   %v0 = load i64, i64* %in0, align 8
diff --git a/llvm/test/Analysis/CostModel/X86/interleaved-store-f64-stride-2.ll b/llvm/test/Analysis/CostModel/X86/interleaved-store-f64-stride-2.ll
--- a/llvm/test/Analysis/CostModel/X86/interleaved-store-f64-stride-2.ll
+++ b/llvm/test/Analysis/CostModel/X86/interleaved-store-f64-stride-2.ll
@@ -24,7 +24,7 @@
 ; AVX1: LV: Found an estimated cost of 64 for VF 16 For instruction:   store double %v1, double* %out1, align 8
 ;
 ; AVX2: LV: Found an estimated cost of 1 for VF 1 For instruction:   store double %v1, double* %out1, align 8
-; AVX2: LV: Found an estimated cost of 6 for VF 2 For instruction:   store double %v1, double* %out1, align 8
+; AVX2: LV: Found an estimated cost of 3 for VF 2 For instruction:   store double %v1, double* %out1, align 8
 ; AVX2: LV: Found an estimated cost of 8 for VF 4 For instruction:   store double %v1, double* %out1, align 8
 ; AVX2: LV: Found an estimated cost of 32 for VF 8 For instruction:   store double %v1, double* %out1, align 8
 ; AVX2: LV: Found an estimated cost of 64 for VF 16 For instruction:   store double %v1, double* %out1, align 8
diff --git a/llvm/test/Analysis/CostModel/X86/interleaved-store-i64-stride-2.ll b/llvm/test/Analysis/CostModel/X86/interleaved-store-i64-stride-2.ll
--- a/llvm/test/Analysis/CostModel/X86/interleaved-store-i64-stride-2.ll
+++ b/llvm/test/Analysis/CostModel/X86/interleaved-store-i64-stride-2.ll
@@ -24,7 +24,7 @@
 ; AVX1: LV: Found an estimated cost of 104 for VF 16 For instruction:   store i64 %v1, i64* %out1, align 8
 ;
 ; AVX2: LV: Found an estimated cost of 1 for VF 1 For instruction:   store i64 %v1, i64* %out1, align 8
-; AVX2: LV: Found an estimated cost of 11 for VF 2 For instruction:   store i64 %v1, i64* %out1, align 8
+; AVX2: LV: Found an estimated cost of 3 for VF 2 For instruction:   store i64 %v1, i64* %out1, align 8
 ; AVX2: LV: Found an estimated cost of 8 for VF 4 For instruction:   store i64 %v1, i64* %out1, align 8
 ; AVX2: LV: Found an estimated cost of 52 for VF 8 For instruction:   store i64 %v1, i64* %out1, align 8
 ; AVX2: LV: Found an estimated cost of 104 for VF 16 For instruction:   store i64 %v1, i64* %out1, align 8