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
@@ -5067,6 +5067,7 @@
       {2, MVT::v4i8, 2},  // (load 8i8 and) deinterleave into 2 x 4i8
       {2, MVT::v8i8, 2},  // (load 16i8 and) deinterleave into 2 x 8i8
       {2, MVT::v16i8, 4},  // (load 32i8 and) deinterleave into 2 x 16i8
+      {2, MVT::v32i8, 6},  // (load 64i8 and) deinterleave into 2 x 32i8
 
       {2, MVT::v2i16, 2}, // (load 4i16 and) deinterleave into 2 x 2i16
       {2, MVT::v4i16, 2}, // (load 8i16 and) deinterleave into 2 x 4i16
@@ -5109,6 +5110,7 @@
       {2, MVT::v4i8, 1}, // interleave 2 x 4i8 into 8i8 (and store)
       {2, MVT::v8i8, 1}, // interleave 2 x 8i8 into 16i8 (and store)
       {2, MVT::v16i8, 3}, // interleave 2 x 16i8 into 32i8 (and store)
+      {2, MVT::v32i8, 4}, // interleave 2 x 32i8 into 64i8 (and store)
 
       {2, MVT::v2i16, 1}, // interleave 2 x 2i16 into 4i16 (and store)
       {2, MVT::v4i16, 1}, // interleave 2 x 4i16 into 8i16 (and store)
diff --git a/llvm/test/Analysis/CostModel/X86/interleaved-load-i8-stride-2.ll b/llvm/test/Analysis/CostModel/X86/interleaved-load-i8-stride-2.ll
--- a/llvm/test/Analysis/CostModel/X86/interleaved-load-i8-stride-2.ll
+++ b/llvm/test/Analysis/CostModel/X86/interleaved-load-i8-stride-2.ll
@@ -30,7 +30,7 @@
 ; AVX2: LV: Found an estimated cost of 3 for VF 4 For instruction:   %v0 = load i8, i8* %in0, align 1
 ; AVX2: LV: Found an estimated cost of 3 for VF 8 For instruction:   %v0 = load i8, i8* %in0, align 1
 ; AVX2: LV: Found an estimated cost of 5 for VF 16 For instruction:   %v0 = load i8, i8* %in0, align 1
-; AVX2: LV: Found an estimated cost of 166 for VF 32 For instruction:   %v0 = load i8, i8* %in0, align 1
+; AVX2: LV: Found an estimated cost of 8 for VF 32 For instruction:   %v0 = load i8, i8* %in0, align 1
 ;
 ; AVX512: LV: Found an estimated cost of 1 for VF 1 For instruction:   %v0 = load i8, i8* %in0, align 1
 ; AVX512: LV: Found an estimated cost of 3 for VF 2 For instruction:   %v0 = load i8, i8* %in0, align 1
diff --git a/llvm/test/Analysis/CostModel/X86/interleaved-store-i8-stride-2.ll b/llvm/test/Analysis/CostModel/X86/interleaved-store-i8-stride-2.ll
--- a/llvm/test/Analysis/CostModel/X86/interleaved-store-i8-stride-2.ll
+++ b/llvm/test/Analysis/CostModel/X86/interleaved-store-i8-stride-2.ll
@@ -30,7 +30,7 @@
 ; AVX2: LV: Found an estimated cost of 2 for VF 4 For instruction:   store i8 %v1, i8* %out1, align 1
 ; AVX2: LV: Found an estimated cost of 2 for VF 8 For instruction:   store i8 %v1, i8* %out1, align 1
 ; AVX2: LV: Found an estimated cost of 4 for VF 16 For instruction:   store i8 %v1, i8* %out1, align 1
-; AVX2: LV: Found an estimated cost of 166 for VF 32 For instruction:   store i8 %v1, i8* %out1, align 1
+; AVX2: LV: Found an estimated cost of 6 for VF 32 For instruction:   store i8 %v1, i8* %out1, align 1
 ;
 ; AVX512: LV: Found an estimated cost of 1 for VF 1 For instruction:   store i8 %v1, i8* %out1, align 1
 ; AVX512: LV: Found an estimated cost of 4 for VF 2 For instruction:   store i8 %v1, i8* %out1, align 1