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diff --git a/llvm/test/Analysis/CostModel/X86/bitreverse.ll b/llvm/test/Analysis/CostModel/X86/bitreverse.ll
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index 00000000000..cd5c22b9096
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+++ b/llvm/test/Analysis/CostModel/X86/bitreverse.ll
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+; RUN: opt < %s -mtriple=x86_64-unknown-linux-gnu -mcpu=pentium4 -cost-model -analyze | FileCheck %s -check-prefix=CHECK -check-prefix=SSE2
+; RUN: opt < %s -mtriple=x86_64-unknown-linux-gnu -mcpu=corei7 -cost-model -analyze | FileCheck %s -check-prefix=CHECK -check-prefix=SSE42
+; RUN: opt < %s -mtriple=x86_64-unknown-linux-gnu -mcpu=corei7-avx -cost-model -analyze | FileCheck %s -check-prefix=CHECK -check-prefix=AVX
+; RUN: opt < %s -mtriple=x86_64-unknown-linux-gnu -mcpu=core-avx2 -cost-model -analyze | FileCheck %s -check-prefix=CHECK -check-prefix=AVX2
+; RUN: opt < %s -mtriple=x86_64-unknown-linux-gnu -mcpu=bdver2 -cost-model -analyze | FileCheck %s -check-prefix=CHECK -check-prefix=XOP -check-prefix=XOPAVX
+; RUN: opt < %s -mtriple=x86_64-unknown-linux-gnu -mcpu=bdver4 -cost-model -analyze | FileCheck %s -check-prefix=CHECK -check-prefix=XOP -check-prefix=XOPAVX2
+
+; Verify the cost of vector bitreverse instructions.
+
+declare <2 x i64> @llvm.bitreverse.v2i64(<2 x i64>)
+declare <4 x i32> @llvm.bitreverse.v4i32(<4 x i32>)
+declare <8 x i16> @llvm.bitreverse.v8i16(<8 x i16>)
+declare <16 x i8> @llvm.bitreverse.v16i8(<16 x i8>)
+
+declare <4 x i64> @llvm.bitreverse.v4i64(<4 x i64>)
+declare <8 x i32> @llvm.bitreverse.v8i32(<8 x i32>)
+declare <16 x i16> @llvm.bitreverse.v16i16(<16 x i16>)
+declare <32 x i8> @llvm.bitreverse.v32i8(<32 x i8>)
+
+define <2 x i64> @var_bitreverse_v2i64(<2 x i64> %a) {
+; CHECK: 'Cost Model Analysis' for function 'var_bitreverse_v2i64':
+; SSE2: Found an estimated cost of 6 for instruction:   %bitreverse
+; SSE42: Found an estimated cost of 6 for instruction:   %bitreverse
+; AVX: Found an estimated cost of 6 for instruction:   %bitreverse
+; AVX2: Found an estimated cost of 6 for instruction:   %bitreverse
+; XOP: Found an estimated cost of 6 for instruction:   %bitreverse
+  %bitreverse = call <2 x i64> @llvm.bitreverse.v2i64(<2 x i64> %a)
+  ret <2 x i64> %bitreverse
+}
+
+define <4 x i64> @var_bitreverse_v4i64(<4 x i64> %a) {
+; CHECK: 'Cost Model Analysis' for function 'var_bitreverse_v4i64':
+; SSE2: Found an estimated cost of 12 for instruction:   %bitreverse
+; SSE42: Found an estimated cost of 12 for instruction:   %bitreverse
+; AVX: Found an estimated cost of 12 for instruction:   %bitreverse
+; AVX2: Found an estimated cost of 12 for instruction:   %bitreverse
+; XOP: Found an estimated cost of 12 for instruction:   %bitreverse
+  %bitreverse = call <4 x i64> @llvm.bitreverse.v4i64(<4 x i64> %a)
+  ret <4 x i64> %bitreverse
+}
+
+define <4 x i32> @var_bitreverse_v4i32(<4 x i32> %a) {
+; CHECK: 'Cost Model Analysis' for function 'var_bitreverse_v4i32':
+; SSE2: Found an estimated cost of 12 for instruction:   %bitreverse
+; SSE42: Found an estimated cost of 12 for instruction:   %bitreverse
+; AVX: Found an estimated cost of 12 for instruction:   %bitreverse
+; AVX2: Found an estimated cost of 12 for instruction:   %bitreverse
+; XOP: Found an estimated cost of 12 for instruction:   %bitreverse
+  %bitreverse = call <4 x i32> @llvm.bitreverse.v4i32(<4 x i32> %a)
+  ret <4 x i32> %bitreverse
+}
+
+define <8 x i32> @var_bitreverse_v8i32(<8 x i32> %a) {
+; CHECK: 'Cost Model Analysis' for function 'var_bitreverse_v8i32':
+; SSE2: Found an estimated cost of 24 for instruction:   %bitreverse
+; SSE42: Found an estimated cost of 24 for instruction:   %bitreverse
+; AVX: Found an estimated cost of 24 for instruction:   %bitreverse
+; AVX2: Found an estimated cost of 24 for instruction:   %bitreverse
+; XOP: Found an estimated cost of 24 for instruction:   %bitreverse
+  %bitreverse = call <8 x i32> @llvm.bitreverse.v8i32(<8 x i32> %a)
+  ret <8 x i32> %bitreverse
+}
+
+define <8 x i16> @var_bitreverse_v8i16(<8 x i16> %a) {
+; CHECK: 'Cost Model Analysis' for function 'var_bitreverse_v8i16':
+; SSE2: Found an estimated cost of 24 for instruction:   %bitreverse
+; SSE42: Found an estimated cost of 24 for instruction:   %bitreverse
+; AVX: Found an estimated cost of 24 for instruction:   %bitreverse
+; AVX2: Found an estimated cost of 24 for instruction:   %bitreverse
+; XOP: Found an estimated cost of 24 for instruction:   %bitreverse
+  %bitreverse = call <8 x i16> @llvm.bitreverse.v8i16(<8 x i16> %a)
+  ret <8 x i16> %bitreverse
+}
+
+define <16 x i16> @var_bitreverse_v16i16(<16 x i16> %a) {
+; CHECK: 'Cost Model Analysis' for function 'var_bitreverse_v16i16':
+; SSE2: Found an estimated cost of 48 for instruction:   %bitreverse
+; SSE42: Found an estimated cost of 48 for instruction:   %bitreverse
+; AVX: Found an estimated cost of 48 for instruction:   %bitreverse
+; AVX2: Found an estimated cost of 48 for instruction:   %bitreverse
+; XOP: Found an estimated cost of 48 for instruction:   %bitreverse
+  %bitreverse = call <16 x i16> @llvm.bitreverse.v16i16(<16 x i16> %a)
+  ret <16 x i16> %bitreverse
+}
+
+define <16 x i8> @var_bitreverse_v16i8(<16 x i8> %a) {
+; CHECK: 'Cost Model Analysis' for function 'var_bitreverse_v16i8':
+; SSE2: Found an estimated cost of 48 for instruction:   %bitreverse
+; SSE42: Found an estimated cost of 48 for instruction:   %bitreverse
+; AVX: Found an estimated cost of 48 for instruction:   %bitreverse
+; AVX2: Found an estimated cost of 48 for instruction:   %bitreverse
+; XOP: Found an estimated cost of 48 for instruction:   %bitreverse
+  %bitreverse = call <16 x i8> @llvm.bitreverse.v16i8(<16 x i8> %a)
+  ret <16 x i8> %bitreverse
+}
+
+define <32 x i8> @var_bitreverse_v32i8(<32 x i8> %a) {
+; CHECK: 'Cost Model Analysis' for function 'var_bitreverse_v32i8':
+; SSE2: Found an estimated cost of 96 for instruction:   %bitreverse
+; SSE42: Found an estimated cost of 96 for instruction:   %bitreverse
+; AVX: Found an estimated cost of 96 for instruction:   %bitreverse
+; AVX2: Found an estimated cost of 96 for instruction:   %bitreverse
+; XOP: Found an estimated cost of 96 for instruction:   %bitreverse
+  %bitreverse = call <32 x i8> @llvm.bitreverse.v32i8(<32 x i8> %a)
+  ret <32 x i8> %bitreverse
+}