-; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mcpu=x86-64 -x86-experimental-vector-shuffle-lowering | FileCheck %s --check-prefix=CHECK-SSE2
+; RUN: llc < %s -mcpu=x86-64 -mattr=+sse2 -x86-experimental-vector-shuffle-legality | FileCheck %s --check-prefix=ALL --check-prefix=SSE --check-prefix=SSE2
+; RUN: llc < %s -mcpu=x86-64 -mattr=+ssse3 -x86-experimental-vector-shuffle-legality | FileCheck %s --check-prefix=ALL --check-prefix=SSE --check-prefix=SSSE3
+; RUN: llc < %s -mcpu=x86-64 -mattr=+sse4.1 -x86-experimental-vector-shuffle-legality | FileCheck %s --check-prefix=ALL --check-prefix=SSE --check-prefix=SSE41
+; RUN: llc < %s -mcpu=x86-64 -mattr=+avx -x86-experimental-vector-shuffle-legality | FileCheck %s --check-prefix=ALL --check-prefix=AVX --check-prefix=AVX1
+; RUN: llc < %s -mcpu=x86-64 -mattr=+avx2 -x86-experimental-vector-shuffle-legality | FileCheck %s --check-prefix=ALL --check-prefix=AVX --check-prefix=AVX2
+;
+; Verify that the DAG combiner correctly folds bitwise operations across
+; shuffles, nested shuffles with undef, pairs of nested shuffles, and other
+; basic and always-safe patterns. Also test that the DAG combiner will combine
+; target-specific shuffle instructions where reasonable.
-target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-unknown"
+declare <4 x i32> @llvm.x86.sse2.pshuf.d(<4 x i32>, i8)
declare <8 x i16> @llvm.x86.sse2.pshufl.w(<8 x i16>, i8)
declare <8 x i16> @llvm.x86.sse2.pshufh.w(<8 x i16>, i8)
+define <4 x i32> @combine_pshufd1(<4 x i32> %a) {
+; ALL-LABEL: combine_pshufd1:
+; ALL: # BB#0: # %entry
+; ALL-NEXT: retq
+entry:
+ %b = call <4 x i32> @llvm.x86.sse2.pshuf.d(<4 x i32> %a, i8 27)
+ %c = call <4 x i32> @llvm.x86.sse2.pshuf.d(<4 x i32> %b, i8 27)
+ ret <4 x i32> %c
+}
+
+define <4 x i32> @combine_pshufd2(<4 x i32> %a) {
+; ALL-LABEL: combine_pshufd2:
+; ALL: # BB#0: # %entry
+; ALL-NEXT: retq
+entry:
+ %b = call <4 x i32> @llvm.x86.sse2.pshuf.d(<4 x i32> %a, i8 27)
+ %b.cast = bitcast <4 x i32> %b to <8 x i16>
+ %c = call <8 x i16> @llvm.x86.sse2.pshufl.w(<8 x i16> %b.cast, i8 -28)
+ %c.cast = bitcast <8 x i16> %c to <4 x i32>
+ %d = call <4 x i32> @llvm.x86.sse2.pshuf.d(<4 x i32> %c.cast, i8 27)
+ ret <4 x i32> %d
+}
+
+define <4 x i32> @combine_pshufd3(<4 x i32> %a) {
+; ALL-LABEL: combine_pshufd3:
+; ALL: # BB#0: # %entry
+; ALL-NEXT: retq
+entry:
+ %b = call <4 x i32> @llvm.x86.sse2.pshuf.d(<4 x i32> %a, i8 27)
+ %b.cast = bitcast <4 x i32> %b to <8 x i16>
+ %c = call <8 x i16> @llvm.x86.sse2.pshufh.w(<8 x i16> %b.cast, i8 -28)
+ %c.cast = bitcast <8 x i16> %c to <4 x i32>
+ %d = call <4 x i32> @llvm.x86.sse2.pshuf.d(<4 x i32> %c.cast, i8 27)
+ ret <4 x i32> %d
+}
+
+define <4 x i32> @combine_pshufd4(<4 x i32> %a) {
+; SSE-LABEL: combine_pshufd4:
+; SSE: # BB#0: # %entry
+; SSE-NEXT: pshufhw {{.*#+}} xmm0 = xmm0[0,1,2,3,7,6,5,4]
+; SSE-NEXT: retq
+;
+; AVX-LABEL: combine_pshufd4:
+; AVX: # BB#0: # %entry
+; AVX-NEXT: vpshufhw {{.*#+}} xmm0 = xmm0[0,1,2,3,7,6,5,4]
+; AVX-NEXT: retq
+entry:
+ %b = call <4 x i32> @llvm.x86.sse2.pshuf.d(<4 x i32> %a, i8 -31)
+ %b.cast = bitcast <4 x i32> %b to <8 x i16>
+ %c = call <8 x i16> @llvm.x86.sse2.pshufh.w(<8 x i16> %b.cast, i8 27)
+ %c.cast = bitcast <8 x i16> %c to <4 x i32>
+ %d = call <4 x i32> @llvm.x86.sse2.pshuf.d(<4 x i32> %c.cast, i8 -31)
+ ret <4 x i32> %d
+}
+
+define <4 x i32> @combine_pshufd5(<4 x i32> %a) {
+; SSE-LABEL: combine_pshufd5:
+; SSE: # BB#0: # %entry
+; SSE-NEXT: pshuflw {{.*#+}} xmm0 = xmm0[3,2,1,0,4,5,6,7]
+; SSE-NEXT: retq
+;
+; AVX-LABEL: combine_pshufd5:
+; AVX: # BB#0: # %entry
+; AVX-NEXT: vpshuflw {{.*#+}} xmm0 = xmm0[3,2,1,0,4,5,6,7]
+; AVX-NEXT: retq
+entry:
+ %b = call <4 x i32> @llvm.x86.sse2.pshuf.d(<4 x i32> %a, i8 -76)
+ %b.cast = bitcast <4 x i32> %b to <8 x i16>
+ %c = call <8 x i16> @llvm.x86.sse2.pshufl.w(<8 x i16> %b.cast, i8 27)
+ %c.cast = bitcast <8 x i16> %c to <4 x i32>
+ %d = call <4 x i32> @llvm.x86.sse2.pshuf.d(<4 x i32> %c.cast, i8 -76)
+ ret <4 x i32> %d
+}
+
+define <4 x i32> @combine_pshufd6(<4 x i32> %a) {
+; SSE-LABEL: combine_pshufd6:
+; SSE: # BB#0: # %entry
+; SSE-NEXT: pshufd {{.*#+}} xmm0 = xmm0[0,0,0,0]
+; SSE-NEXT: retq
+;
+; AVX-LABEL: combine_pshufd6:
+; AVX: # BB#0: # %entry
+; AVX-NEXT: vpshufd {{.*#+}} xmm0 = xmm0[0,0,0,0]
+; AVX-NEXT: retq
+entry:
+ %b = call <4 x i32> @llvm.x86.sse2.pshuf.d(<4 x i32> %a, i8 0)
+ %c = call <4 x i32> @llvm.x86.sse2.pshuf.d(<4 x i32> %b, i8 8)
+ ret <4 x i32> %c
+}
+
define <8 x i16> @combine_pshuflw1(<8 x i16> %a) {
-; CHECK-SSE2-LABEL: @combine_pshuflw1
-; CHECK-SSE2: # BB#0:
-; CHECK-SSE2-NEXT: retq
- %b = call <8 x i16> @llvm.x86.sse2.pshufl.w(<8 x i16> %a, i8 27)
- %c = call <8 x i16> @llvm.x86.sse2.pshufl.w(<8 x i16> %b, i8 27)
+; ALL-LABEL: combine_pshuflw1:
+; ALL: # BB#0: # %entry
+; ALL-NEXT: retq
+entry:
+ %b = call <8 x i16> @llvm.x86.sse2.pshufl.w(<8 x i16> %a, i8 27)
+ %c = call <8 x i16> @llvm.x86.sse2.pshufl.w(<8 x i16> %b, i8 27)
ret <8 x i16> %c
}
define <8 x i16> @combine_pshuflw2(<8 x i16> %a) {
-; CHECK-SSE2-LABEL: @combine_pshuflw2
-; CHECK-SSE2: # BB#0:
-; CHECK-SSE2-NEXT: retq
+; ALL-LABEL: combine_pshuflw2:
+; ALL: # BB#0: # %entry
+; ALL-NEXT: retq
+entry:
%b = call <8 x i16> @llvm.x86.sse2.pshufl.w(<8 x i16> %a, i8 27)
- %c = call <8 x i16> @llvm.x86.sse2.pshufh.w(<8 x i16> %b, i8 -28)
- %d = call <8 x i16> @llvm.x86.sse2.pshufl.w(<8 x i16> %c, i8 27)
+ %c = call <8 x i16> @llvm.x86.sse2.pshufh.w(<8 x i16> %b, i8 -28)
+ %d = call <8 x i16> @llvm.x86.sse2.pshufl.w(<8 x i16> %c, i8 27)
ret <8 x i16> %d
}
define <8 x i16> @combine_pshuflw3(<8 x i16> %a) {
-; CHECK-SSE2-LABEL: @combine_pshuflw3
-; CHECK-SSE2: # BB#0:
-; CHECK-SSE2-NEXT: pshufhw {{.*}} # xmm0 = xmm0[0,1,2,3,7,6,5,4]
-; CHECK-SSE2-NEXT: retq
+; SSE-LABEL: combine_pshuflw3:
+; SSE: # BB#0: # %entry
+; SSE-NEXT: pshufhw {{.*#+}} xmm0 = xmm0[0,1,2,3,7,6,5,4]
+; SSE-NEXT: retq
+;
+; AVX-LABEL: combine_pshuflw3:
+; AVX: # BB#0: # %entry
+; AVX-NEXT: vpshufhw {{.*#+}} xmm0 = xmm0[0,1,2,3,7,6,5,4]
+; AVX-NEXT: retq
+entry:
%b = call <8 x i16> @llvm.x86.sse2.pshufl.w(<8 x i16> %a, i8 27)
- %c = call <8 x i16> @llvm.x86.sse2.pshufh.w(<8 x i16> %b, i8 27)
- %d = call <8 x i16> @llvm.x86.sse2.pshufl.w(<8 x i16> %c, i8 27)
+ %c = call <8 x i16> @llvm.x86.sse2.pshufh.w(<8 x i16> %b, i8 27)
+ %d = call <8 x i16> @llvm.x86.sse2.pshufl.w(<8 x i16> %c, i8 27)
ret <8 x i16> %d
}
define <8 x i16> @combine_pshufhw1(<8 x i16> %a) {
-; CHECK-SSE2-LABEL: @combine_pshufhw1
-; CHECK-SSE2: # BB#0:
-; CHECK-SSE2-NEXT: pshuflw {{.*}} # xmm0 = xmm0[3,2,1,0,4,5,6,7]
-; CHECK-SSE2-NEXT: retq
+; SSE-LABEL: combine_pshufhw1:
+; SSE: # BB#0: # %entry
+; SSE-NEXT: pshuflw {{.*#+}} xmm0 = xmm0[3,2,1,0,4,5,6,7]
+; SSE-NEXT: retq
+;
+; AVX-LABEL: combine_pshufhw1:
+; AVX: # BB#0: # %entry
+; AVX-NEXT: vpshuflw {{.*#+}} xmm0 = xmm0[3,2,1,0,4,5,6,7]
+; AVX-NEXT: retq
+entry:
%b = call <8 x i16> @llvm.x86.sse2.pshufh.w(<8 x i16> %a, i8 27)
- %c = call <8 x i16> @llvm.x86.sse2.pshufl.w(<8 x i16> %b, i8 27)
- %d = call <8 x i16> @llvm.x86.sse2.pshufh.w(<8 x i16> %c, i8 27)
+ %c = call <8 x i16> @llvm.x86.sse2.pshufl.w(<8 x i16> %b, i8 27)
+ %d = call <8 x i16> @llvm.x86.sse2.pshufh.w(<8 x i16> %c, i8 27)
ret <8 x i16> %d
}
+define <4 x i32> @combine_bitwise_ops_test1(<4 x i32> %a, <4 x i32> %b, <4 x i32> %c) {
+; SSE-LABEL: combine_bitwise_ops_test1:
+; SSE: # BB#0:
+; SSE-NEXT: pand %xmm1, %xmm0
+; SSE-NEXT: pshufd {{.*#+}} xmm0 = xmm0[0,2,1,3]
+; SSE-NEXT: retq
+;
+; AVX-LABEL: combine_bitwise_ops_test1:
+; AVX: # BB#0:
+; AVX-NEXT: vpand %xmm1, %xmm0, %xmm0
+; AVX-NEXT: vpshufd {{.*#+}} xmm0 = xmm0[0,2,1,3]
+; AVX-NEXT: retq
+ %shuf1 = shufflevector <4 x i32> %a, <4 x i32> %c, <4 x i32><i32 0, i32 2, i32 1, i32 3>
+ %shuf2 = shufflevector <4 x i32> %b, <4 x i32> %c, <4 x i32><i32 0, i32 2, i32 1, i32 3>
+ %and = and <4 x i32> %shuf1, %shuf2
+ ret <4 x i32> %and
+}
+
+define <4 x i32> @combine_bitwise_ops_test2(<4 x i32> %a, <4 x i32> %b, <4 x i32> %c) {
+; SSE-LABEL: combine_bitwise_ops_test2:
+; SSE: # BB#0:
+; SSE-NEXT: por %xmm1, %xmm0
+; SSE-NEXT: pshufd {{.*#+}} xmm0 = xmm0[0,2,1,3]
+; SSE-NEXT: retq
+;
+; AVX-LABEL: combine_bitwise_ops_test2:
+; AVX: # BB#0:
+; AVX-NEXT: vpor %xmm1, %xmm0, %xmm0
+; AVX-NEXT: vpshufd {{.*#+}} xmm0 = xmm0[0,2,1,3]
+; AVX-NEXT: retq
+ %shuf1 = shufflevector <4 x i32> %a, <4 x i32> %c, <4 x i32><i32 0, i32 2, i32 1, i32 3>
+ %shuf2 = shufflevector <4 x i32> %b, <4 x i32> %c, <4 x i32><i32 0, i32 2, i32 1, i32 3>
+ %or = or <4 x i32> %shuf1, %shuf2
+ ret <4 x i32> %or
+}
+
+define <4 x i32> @combine_bitwise_ops_test3(<4 x i32> %a, <4 x i32> %b, <4 x i32> %c) {
+; SSE-LABEL: combine_bitwise_ops_test3:
+; SSE: # BB#0:
+; SSE-NEXT: pxor %xmm1, %xmm0
+; SSE-NEXT: pshufd {{.*#+}} xmm0 = xmm0[0,2,1,3]
+; SSE-NEXT: retq
+;
+; AVX-LABEL: combine_bitwise_ops_test3:
+; AVX: # BB#0:
+; AVX-NEXT: vpxor %xmm1, %xmm0, %xmm0
+; AVX-NEXT: vpshufd {{.*#+}} xmm0 = xmm0[0,2,1,3]
+; AVX-NEXT: retq
+ %shuf1 = shufflevector <4 x i32> %a, <4 x i32> %c, <4 x i32><i32 0, i32 2, i32 1, i32 3>
+ %shuf2 = shufflevector <4 x i32> %b, <4 x i32> %c, <4 x i32><i32 0, i32 2, i32 1, i32 3>
+ %xor = xor <4 x i32> %shuf1, %shuf2
+ ret <4 x i32> %xor
+}
+
+define <4 x i32> @combine_bitwise_ops_test4(<4 x i32> %a, <4 x i32> %b, <4 x i32> %c) {
+; SSE-LABEL: combine_bitwise_ops_test4:
+; SSE: # BB#0:
+; SSE-NEXT: pand %xmm1, %xmm0
+; SSE-NEXT: pshufd {{.*#+}} xmm0 = xmm0[0,2,1,3]
+; SSE-NEXT: retq
+;
+; AVX-LABEL: combine_bitwise_ops_test4:
+; AVX: # BB#0:
+; AVX-NEXT: vpand %xmm1, %xmm0, %xmm0
+; AVX-NEXT: vpshufd {{.*#+}} xmm0 = xmm0[0,2,1,3]
+; AVX-NEXT: retq
+ %shuf1 = shufflevector <4 x i32> %c, <4 x i32> %a, <4 x i32><i32 4, i32 6, i32 5, i32 7>
+ %shuf2 = shufflevector <4 x i32> %c, <4 x i32> %b, <4 x i32><i32 4, i32 6, i32 5, i32 7>
+ %and = and <4 x i32> %shuf1, %shuf2
+ ret <4 x i32> %and
+}
+
+define <4 x i32> @combine_bitwise_ops_test5(<4 x i32> %a, <4 x i32> %b, <4 x i32> %c) {
+; SSE-LABEL: combine_bitwise_ops_test5:
+; SSE: # BB#0:
+; SSE-NEXT: por %xmm1, %xmm0
+; SSE-NEXT: pshufd {{.*#+}} xmm0 = xmm0[0,2,1,3]
+; SSE-NEXT: retq
+;
+; AVX-LABEL: combine_bitwise_ops_test5:
+; AVX: # BB#0:
+; AVX-NEXT: vpor %xmm1, %xmm0, %xmm0
+; AVX-NEXT: vpshufd {{.*#+}} xmm0 = xmm0[0,2,1,3]
+; AVX-NEXT: retq
+ %shuf1 = shufflevector <4 x i32> %c, <4 x i32> %a, <4 x i32><i32 4, i32 6, i32 5, i32 7>
+ %shuf2 = shufflevector <4 x i32> %c, <4 x i32> %b, <4 x i32><i32 4, i32 6, i32 5, i32 7>
+ %or = or <4 x i32> %shuf1, %shuf2
+ ret <4 x i32> %or
+}
+
+define <4 x i32> @combine_bitwise_ops_test6(<4 x i32> %a, <4 x i32> %b, <4 x i32> %c) {
+; SSE-LABEL: combine_bitwise_ops_test6:
+; SSE: # BB#0:
+; SSE-NEXT: pxor %xmm1, %xmm0
+; SSE-NEXT: pshufd {{.*#+}} xmm0 = xmm0[0,2,1,3]
+; SSE-NEXT: retq
+;
+; AVX-LABEL: combine_bitwise_ops_test6:
+; AVX: # BB#0:
+; AVX-NEXT: vpxor %xmm1, %xmm0, %xmm0
+; AVX-NEXT: vpshufd {{.*#+}} xmm0 = xmm0[0,2,1,3]
+; AVX-NEXT: retq
+ %shuf1 = shufflevector <4 x i32> %c, <4 x i32> %a, <4 x i32><i32 4, i32 6, i32 5, i32 7>
+ %shuf2 = shufflevector <4 x i32> %c, <4 x i32> %b, <4 x i32><i32 4, i32 6, i32 5, i32 7>
+ %xor = xor <4 x i32> %shuf1, %shuf2
+ ret <4 x i32> %xor
+}
+
+
+; Verify that DAGCombiner moves the shuffle after the xor/and/or even if shuffles
+; are not performing a swizzle operations.
+
+define <4 x i32> @combine_bitwise_ops_test1b(<4 x i32> %a, <4 x i32> %b, <4 x i32> %c) {
+; SSE2-LABEL: combine_bitwise_ops_test1b:
+; SSE2: # BB#0:
+; SSE2-NEXT: pand %xmm1, %xmm0
+; SSE2-NEXT: pshufd {{.*#+}} xmm0 = xmm0[0,2,2,3]
+; SSE2-NEXT: pshufd {{.*#+}} xmm1 = xmm2[1,3,2,3]
+; SSE2-NEXT: punpckldq {{.*#+}} xmm0 = xmm0[0],xmm1[0],xmm0[1],xmm1[1]
+; SSE2-NEXT: retq
+;
+; SSSE3-LABEL: combine_bitwise_ops_test1b:
+; SSSE3: # BB#0:
+; SSSE3-NEXT: pand %xmm1, %xmm0
+; SSSE3-NEXT: pshufd {{.*#+}} xmm0 = xmm0[0,2,2,3]
+; SSSE3-NEXT: pshufd {{.*#+}} xmm1 = xmm2[1,3,2,3]
+; SSSE3-NEXT: punpckldq {{.*#+}} xmm0 = xmm0[0],xmm1[0],xmm0[1],xmm1[1]
+; SSSE3-NEXT: retq
+;
+; SSE41-LABEL: combine_bitwise_ops_test1b:
+; SSE41: # BB#0:
+; SSE41-NEXT: pand %xmm1, %xmm0
+; SSE41-NEXT: pblendw {{.*#+}} xmm0 = xmm0[0,1],xmm2[2,3],xmm0[4,5],xmm2[6,7]
+; SSE41-NEXT: retq
+;
+; AVX1-LABEL: combine_bitwise_ops_test1b:
+; AVX1: # BB#0:
+; AVX1-NEXT: vpand %xmm1, %xmm0, %xmm0
+; AVX1-NEXT: vpblendw {{.*#+}} xmm0 = xmm0[0,1],xmm2[2,3],xmm0[4,5],xmm2[6,7]
+; AVX1-NEXT: retq
+;
+; AVX2-LABEL: combine_bitwise_ops_test1b:
+; AVX2: # BB#0:
+; AVX2-NEXT: vpand %xmm1, %xmm0, %xmm0
+; AVX2-NEXT: vpblendd {{.*#+}} xmm0 = xmm0[0],xmm2[1],xmm0[2],xmm2[3]
+; AVX2-NEXT: retq
+ %shuf1 = shufflevector <4 x i32> %a, <4 x i32> %c, <4 x i32><i32 0, i32 5, i32 2, i32 7>
+ %shuf2 = shufflevector <4 x i32> %b, <4 x i32> %c, <4 x i32><i32 0, i32 5, i32 2, i32 7>
+ %and = and <4 x i32> %shuf1, %shuf2
+ ret <4 x i32> %and
+}
+
+define <4 x i32> @combine_bitwise_ops_test2b(<4 x i32> %a, <4 x i32> %b, <4 x i32> %c) {
+; SSE2-LABEL: combine_bitwise_ops_test2b:
+; SSE2: # BB#0:
+; SSE2-NEXT: por %xmm1, %xmm0
+; SSE2-NEXT: pshufd {{.*#+}} xmm0 = xmm0[0,2,2,3]
+; SSE2-NEXT: pshufd {{.*#+}} xmm1 = xmm2[1,3,2,3]
+; SSE2-NEXT: punpckldq {{.*#+}} xmm0 = xmm0[0],xmm1[0],xmm0[1],xmm1[1]
+; SSE2-NEXT: retq
+;
+; SSSE3-LABEL: combine_bitwise_ops_test2b:
+; SSSE3: # BB#0:
+; SSSE3-NEXT: por %xmm1, %xmm0
+; SSSE3-NEXT: pshufd {{.*#+}} xmm0 = xmm0[0,2,2,3]
+; SSSE3-NEXT: pshufd {{.*#+}} xmm1 = xmm2[1,3,2,3]
+; SSSE3-NEXT: punpckldq {{.*#+}} xmm0 = xmm0[0],xmm1[0],xmm0[1],xmm1[1]
+; SSSE3-NEXT: retq
+;
+; SSE41-LABEL: combine_bitwise_ops_test2b:
+; SSE41: # BB#0:
+; SSE41-NEXT: por %xmm1, %xmm0
+; SSE41-NEXT: pblendw {{.*#+}} xmm0 = xmm0[0,1],xmm2[2,3],xmm0[4,5],xmm2[6,7]
+; SSE41-NEXT: retq
+;
+; AVX1-LABEL: combine_bitwise_ops_test2b:
+; AVX1: # BB#0:
+; AVX1-NEXT: vpor %xmm1, %xmm0, %xmm0
+; AVX1-NEXT: vpblendw {{.*#+}} xmm0 = xmm0[0,1],xmm2[2,3],xmm0[4,5],xmm2[6,7]
+; AVX1-NEXT: retq
+;
+; AVX2-LABEL: combine_bitwise_ops_test2b:
+; AVX2: # BB#0:
+; AVX2-NEXT: vpor %xmm1, %xmm0, %xmm0
+; AVX2-NEXT: vpblendd {{.*#+}} xmm0 = xmm0[0],xmm2[1],xmm0[2],xmm2[3]
+; AVX2-NEXT: retq
+ %shuf1 = shufflevector <4 x i32> %a, <4 x i32> %c, <4 x i32><i32 0, i32 5, i32 2, i32 7>
+ %shuf2 = shufflevector <4 x i32> %b, <4 x i32> %c, <4 x i32><i32 0, i32 5, i32 2, i32 7>
+ %or = or <4 x i32> %shuf1, %shuf2
+ ret <4 x i32> %or
+}
+
+define <4 x i32> @combine_bitwise_ops_test3b(<4 x i32> %a, <4 x i32> %b, <4 x i32> %c) {
+; SSE2-LABEL: combine_bitwise_ops_test3b:
+; SSE2: # BB#0:
+; SSE2-NEXT: xorps %xmm1, %xmm0
+; SSE2-NEXT: andps {{.*}}(%rip), %xmm0
+; SSE2-NEXT: retq
+;
+; SSSE3-LABEL: combine_bitwise_ops_test3b:
+; SSSE3: # BB#0:
+; SSSE3-NEXT: xorps %xmm1, %xmm0
+; SSSE3-NEXT: andps {{.*}}(%rip), %xmm0
+; SSSE3-NEXT: retq
+;
+; SSE41-LABEL: combine_bitwise_ops_test3b:
+; SSE41: # BB#0:
+; SSE41-NEXT: pxor %xmm1, %xmm0
+; SSE41-NEXT: pxor %xmm1, %xmm1
+; SSE41-NEXT: pblendw {{.*#+}} xmm0 = xmm0[0,1],xmm1[2,3],xmm0[4,5],xmm1[6,7]
+; SSE41-NEXT: retq
+;
+; AVX1-LABEL: combine_bitwise_ops_test3b:
+; AVX1: # BB#0:
+; AVX1-NEXT: vpxor %xmm1, %xmm0, %xmm0
+; AVX1-NEXT: vpxor %xmm1, %xmm1, %xmm1
+; AVX1-NEXT: vpblendw {{.*#+}} xmm0 = xmm0[0,1],xmm1[2,3],xmm0[4,5],xmm1[6,7]
+; AVX1-NEXT: retq
+;
+; AVX2-LABEL: combine_bitwise_ops_test3b:
+; AVX2: # BB#0:
+; AVX2-NEXT: vpxor %xmm1, %xmm0, %xmm0
+; AVX2-NEXT: vpxor %xmm1, %xmm1, %xmm1
+; AVX2-NEXT: vpblendd {{.*#+}} xmm0 = xmm0[0],xmm1[1],xmm0[2],xmm1[3]
+; AVX2-NEXT: retq
+ %shuf1 = shufflevector <4 x i32> %a, <4 x i32> %c, <4 x i32><i32 0, i32 5, i32 2, i32 7>
+ %shuf2 = shufflevector <4 x i32> %b, <4 x i32> %c, <4 x i32><i32 0, i32 5, i32 2, i32 7>
+ %xor = xor <4 x i32> %shuf1, %shuf2
+ ret <4 x i32> %xor
+}
+
+define <4 x i32> @combine_bitwise_ops_test4b(<4 x i32> %a, <4 x i32> %b, <4 x i32> %c) {
+; SSE2-LABEL: combine_bitwise_ops_test4b:
+; SSE2: # BB#0:
+; SSE2-NEXT: pand %xmm1, %xmm0
+; SSE2-NEXT: pshufd {{.*#+}} xmm1 = xmm0[1,3,2,3]
+; SSE2-NEXT: pshufd {{.*#+}} xmm0 = xmm2[0,2,2,3]
+; SSE2-NEXT: punpckldq {{.*#+}} xmm0 = xmm0[0],xmm1[0],xmm0[1],xmm1[1]
+; SSE2-NEXT: retq
+;
+; SSSE3-LABEL: combine_bitwise_ops_test4b:
+; SSSE3: # BB#0:
+; SSSE3-NEXT: pand %xmm1, %xmm0
+; SSSE3-NEXT: pshufd {{.*#+}} xmm1 = xmm0[1,3,2,3]
+; SSSE3-NEXT: pshufd {{.*#+}} xmm0 = xmm2[0,2,2,3]
+; SSSE3-NEXT: punpckldq {{.*#+}} xmm0 = xmm0[0],xmm1[0],xmm0[1],xmm1[1]
+; SSSE3-NEXT: retq
+;
+; SSE41-LABEL: combine_bitwise_ops_test4b:
+; SSE41: # BB#0:
+; SSE41-NEXT: pand %xmm1, %xmm0
+; SSE41-NEXT: pblendw {{.*#+}} xmm0 = xmm2[0,1],xmm0[2,3],xmm2[4,5],xmm0[6,7]
+; SSE41-NEXT: retq
+;
+; AVX1-LABEL: combine_bitwise_ops_test4b:
+; AVX1: # BB#0:
+; AVX1-NEXT: vpand %xmm1, %xmm0, %xmm0
+; AVX1-NEXT: vpblendw {{.*#+}} xmm0 = xmm2[0,1],xmm0[2,3],xmm2[4,5],xmm0[6,7]
+; AVX1-NEXT: retq
+;
+; AVX2-LABEL: combine_bitwise_ops_test4b:
+; AVX2: # BB#0:
+; AVX2-NEXT: vpand %xmm1, %xmm0, %xmm0
+; AVX2-NEXT: vpblendd {{.*#+}} xmm0 = xmm2[0],xmm0[1],xmm2[2],xmm0[3]
+; AVX2-NEXT: retq
+ %shuf1 = shufflevector <4 x i32> %c, <4 x i32> %a, <4 x i32><i32 0, i32 5, i32 2, i32 7>
+ %shuf2 = shufflevector <4 x i32> %c, <4 x i32> %b, <4 x i32><i32 0, i32 5, i32 2, i32 7>
+ %and = and <4 x i32> %shuf1, %shuf2
+ ret <4 x i32> %and
+}
+
+define <4 x i32> @combine_bitwise_ops_test5b(<4 x i32> %a, <4 x i32> %b, <4 x i32> %c) {
+; SSE2-LABEL: combine_bitwise_ops_test5b:
+; SSE2: # BB#0:
+; SSE2-NEXT: por %xmm1, %xmm0
+; SSE2-NEXT: pshufd {{.*#+}} xmm1 = xmm0[1,3,2,3]
+; SSE2-NEXT: pshufd {{.*#+}} xmm0 = xmm2[0,2,2,3]
+; SSE2-NEXT: punpckldq {{.*#+}} xmm0 = xmm0[0],xmm1[0],xmm0[1],xmm1[1]
+; SSE2-NEXT: retq
+;
+; SSSE3-LABEL: combine_bitwise_ops_test5b:
+; SSSE3: # BB#0:
+; SSSE3-NEXT: por %xmm1, %xmm0
+; SSSE3-NEXT: pshufd {{.*#+}} xmm1 = xmm0[1,3,2,3]
+; SSSE3-NEXT: pshufd {{.*#+}} xmm0 = xmm2[0,2,2,3]
+; SSSE3-NEXT: punpckldq {{.*#+}} xmm0 = xmm0[0],xmm1[0],xmm0[1],xmm1[1]
+; SSSE3-NEXT: retq
+;
+; SSE41-LABEL: combine_bitwise_ops_test5b:
+; SSE41: # BB#0:
+; SSE41-NEXT: por %xmm1, %xmm0
+; SSE41-NEXT: pblendw {{.*#+}} xmm0 = xmm2[0,1],xmm0[2,3],xmm2[4,5],xmm0[6,7]
+; SSE41-NEXT: retq
+;
+; AVX1-LABEL: combine_bitwise_ops_test5b:
+; AVX1: # BB#0:
+; AVX1-NEXT: vpor %xmm1, %xmm0, %xmm0
+; AVX1-NEXT: vpblendw {{.*#+}} xmm0 = xmm2[0,1],xmm0[2,3],xmm2[4,5],xmm0[6,7]
+; AVX1-NEXT: retq
+;
+; AVX2-LABEL: combine_bitwise_ops_test5b:
+; AVX2: # BB#0:
+; AVX2-NEXT: vpor %xmm1, %xmm0, %xmm0
+; AVX2-NEXT: vpblendd {{.*#+}} xmm0 = xmm2[0],xmm0[1],xmm2[2],xmm0[3]
+; AVX2-NEXT: retq
+ %shuf1 = shufflevector <4 x i32> %c, <4 x i32> %a, <4 x i32><i32 0, i32 5, i32 2, i32 7>
+ %shuf2 = shufflevector <4 x i32> %c, <4 x i32> %b, <4 x i32><i32 0, i32 5, i32 2, i32 7>
+ %or = or <4 x i32> %shuf1, %shuf2
+ ret <4 x i32> %or
+}
+
+define <4 x i32> @combine_bitwise_ops_test6b(<4 x i32> %a, <4 x i32> %b, <4 x i32> %c) {
+; SSE2-LABEL: combine_bitwise_ops_test6b:
+; SSE2: # BB#0:
+; SSE2-NEXT: xorps %xmm1, %xmm0
+; SSE2-NEXT: andps {{.*}}(%rip), %xmm0
+; SSE2-NEXT: retq
+;
+; SSSE3-LABEL: combine_bitwise_ops_test6b:
+; SSSE3: # BB#0:
+; SSSE3-NEXT: xorps %xmm1, %xmm0
+; SSSE3-NEXT: andps {{.*}}(%rip), %xmm0
+; SSSE3-NEXT: retq
+;
+; SSE41-LABEL: combine_bitwise_ops_test6b:
+; SSE41: # BB#0:
+; SSE41-NEXT: pxor %xmm1, %xmm0
+; SSE41-NEXT: pxor %xmm1, %xmm1
+; SSE41-NEXT: pblendw {{.*#+}} xmm0 = xmm1[0,1],xmm0[2,3],xmm1[4,5],xmm0[6,7]
+; SSE41-NEXT: retq
+;
+; AVX1-LABEL: combine_bitwise_ops_test6b:
+; AVX1: # BB#0:
+; AVX1-NEXT: vpxor %xmm1, %xmm0, %xmm0
+; AVX1-NEXT: vpxor %xmm1, %xmm1, %xmm1
+; AVX1-NEXT: vpblendw {{.*#+}} xmm0 = xmm1[0,1],xmm0[2,3],xmm1[4,5],xmm0[6,7]
+; AVX1-NEXT: retq
+;
+; AVX2-LABEL: combine_bitwise_ops_test6b:
+; AVX2: # BB#0:
+; AVX2-NEXT: vpxor %xmm1, %xmm0, %xmm0
+; AVX2-NEXT: vpxor %xmm1, %xmm1, %xmm1
+; AVX2-NEXT: vpblendd {{.*#+}} xmm0 = xmm1[0],xmm0[1],xmm1[2],xmm0[3]
+; AVX2-NEXT: retq
+ %shuf1 = shufflevector <4 x i32> %c, <4 x i32> %a, <4 x i32><i32 0, i32 5, i32 2, i32 7>
+ %shuf2 = shufflevector <4 x i32> %c, <4 x i32> %b, <4 x i32><i32 0, i32 5, i32 2, i32 7>
+ %xor = xor <4 x i32> %shuf1, %shuf2
+ ret <4 x i32> %xor
+}
+
+define <4 x i32> @combine_bitwise_ops_test1c(<4 x i32> %a, <4 x i32> %b, <4 x i32> %c) {
+; SSE2-LABEL: combine_bitwise_ops_test1c:
+; SSE2: # BB#0:
+; SSE2-NEXT: pand %xmm1, %xmm0
+; SSE2-NEXT: pshufd {{.*#+}} xmm0 = xmm0[0,2,2,3]
+; SSE2-NEXT: pshufd {{.*#+}} xmm1 = xmm2[1,3,2,3]
+; SSE2-NEXT: punpcklqdq {{.*#+}} xmm0 = xmm0[0],xmm1[0]
+; SSE2-NEXT: retq
+;
+; SSSE3-LABEL: combine_bitwise_ops_test1c:
+; SSSE3: # BB#0:
+; SSSE3-NEXT: pand %xmm1, %xmm0
+; SSSE3-NEXT: pshufd {{.*#+}} xmm0 = xmm0[0,2,2,3]
+; SSSE3-NEXT: pshufd {{.*#+}} xmm1 = xmm2[1,3,2,3]
+; SSSE3-NEXT: punpcklqdq {{.*#+}} xmm0 = xmm0[0],xmm1[0]
+; SSSE3-NEXT: retq
+;
+; SSE41-LABEL: combine_bitwise_ops_test1c:
+; SSE41: # BB#0:
+; SSE41-NEXT: pand %xmm1, %xmm0
+; SSE41-NEXT: pblendw {{.*#+}} xmm0 = xmm0[0,1],xmm2[2,3],xmm0[4,5],xmm2[6,7]
+; SSE41-NEXT: pshufd {{.*#+}} xmm0 = xmm0[0,2,1,3]
+; SSE41-NEXT: retq
+;
+; AVX1-LABEL: combine_bitwise_ops_test1c:
+; AVX1: # BB#0:
+; AVX1-NEXT: vpand %xmm1, %xmm0, %xmm0
+; AVX1-NEXT: vpblendw {{.*#+}} xmm0 = xmm0[0,1],xmm2[2,3],xmm0[4,5],xmm2[6,7]
+; AVX1-NEXT: vpshufd {{.*#+}} xmm0 = xmm0[0,2,1,3]
+; AVX1-NEXT: retq
+;
+; AVX2-LABEL: combine_bitwise_ops_test1c:
+; AVX2: # BB#0:
+; AVX2-NEXT: vpand %xmm1, %xmm0, %xmm0
+; AVX2-NEXT: vpblendd {{.*#+}} xmm0 = xmm0[0],xmm2[1],xmm0[2],xmm2[3]
+; AVX2-NEXT: vpshufd {{.*#+}} xmm0 = xmm0[0,2,1,3]
+; AVX2-NEXT: retq
+ %shuf1 = shufflevector <4 x i32> %a, <4 x i32> %c, <4 x i32><i32 0, i32 2, i32 5, i32 7>
+ %shuf2 = shufflevector <4 x i32> %b, <4 x i32> %c, <4 x i32><i32 0, i32 2, i32 5, i32 7>
+ %and = and <4 x i32> %shuf1, %shuf2
+ ret <4 x i32> %and
+}
+
+define <4 x i32> @combine_bitwise_ops_test2c(<4 x i32> %a, <4 x i32> %b, <4 x i32> %c) {
+; SSE2-LABEL: combine_bitwise_ops_test2c:
+; SSE2: # BB#0:
+; SSE2-NEXT: por %xmm1, %xmm0
+; SSE2-NEXT: pshufd {{.*#+}} xmm0 = xmm0[0,2,2,3]
+; SSE2-NEXT: pshufd {{.*#+}} xmm1 = xmm2[1,3,2,3]
+; SSE2-NEXT: punpcklqdq {{.*#+}} xmm0 = xmm0[0],xmm1[0]
+; SSE2-NEXT: retq
+;
+; SSSE3-LABEL: combine_bitwise_ops_test2c:
+; SSSE3: # BB#0:
+; SSSE3-NEXT: por %xmm1, %xmm0
+; SSSE3-NEXT: pshufd {{.*#+}} xmm0 = xmm0[0,2,2,3]
+; SSSE3-NEXT: pshufd {{.*#+}} xmm1 = xmm2[1,3,2,3]
+; SSSE3-NEXT: punpcklqdq {{.*#+}} xmm0 = xmm0[0],xmm1[0]
+; SSSE3-NEXT: retq
+;
+; SSE41-LABEL: combine_bitwise_ops_test2c:
+; SSE41: # BB#0:
+; SSE41-NEXT: por %xmm1, %xmm0
+; SSE41-NEXT: pblendw {{.*#+}} xmm0 = xmm0[0,1],xmm2[2,3],xmm0[4,5],xmm2[6,7]
+; SSE41-NEXT: pshufd {{.*#+}} xmm0 = xmm0[0,2,1,3]
+; SSE41-NEXT: retq
+;
+; AVX1-LABEL: combine_bitwise_ops_test2c:
+; AVX1: # BB#0:
+; AVX1-NEXT: vpor %xmm1, %xmm0, %xmm0
+; AVX1-NEXT: vpblendw {{.*#+}} xmm0 = xmm0[0,1],xmm2[2,3],xmm0[4,5],xmm2[6,7]
+; AVX1-NEXT: vpshufd {{.*#+}} xmm0 = xmm0[0,2,1,3]
+; AVX1-NEXT: retq
+;
+; AVX2-LABEL: combine_bitwise_ops_test2c:
+; AVX2: # BB#0:
+; AVX2-NEXT: vpor %xmm1, %xmm0, %xmm0
+; AVX2-NEXT: vpblendd {{.*#+}} xmm0 = xmm0[0],xmm2[1],xmm0[2],xmm2[3]
+; AVX2-NEXT: vpshufd {{.*#+}} xmm0 = xmm0[0,2,1,3]
+; AVX2-NEXT: retq
+ %shuf1 = shufflevector <4 x i32> %a, <4 x i32> %c, <4 x i32><i32 0, i32 2, i32 5, i32 7>
+ %shuf2 = shufflevector <4 x i32> %b, <4 x i32> %c, <4 x i32><i32 0, i32 2, i32 5, i32 7>
+ %or = or <4 x i32> %shuf1, %shuf2
+ ret <4 x i32> %or
+}
+
+define <4 x i32> @combine_bitwise_ops_test3c(<4 x i32> %a, <4 x i32> %b, <4 x i32> %c) {
+; SSE2-LABEL: combine_bitwise_ops_test3c:
+; SSE2: # BB#0:
+; SSE2-NEXT: pxor %xmm1, %xmm0
+; SSE2-NEXT: pshufd {{.*#+}} xmm0 = xmm0[0,2,2,3]
+; SSE2-NEXT: pxor %xmm1, %xmm1
+; SSE2-NEXT: punpcklqdq {{.*#+}} xmm0 = xmm0[0],xmm1[0]
+; SSE2-NEXT: retq
+;
+; SSSE3-LABEL: combine_bitwise_ops_test3c:
+; SSSE3: # BB#0:
+; SSSE3-NEXT: pxor %xmm1, %xmm0
+; SSSE3-NEXT: pshufd {{.*#+}} xmm0 = xmm0[0,2,2,3]
+; SSSE3-NEXT: pxor %xmm1, %xmm1
+; SSSE3-NEXT: punpcklqdq {{.*#+}} xmm0 = xmm0[0],xmm1[0]
+; SSSE3-NEXT: retq
+;
+; SSE41-LABEL: combine_bitwise_ops_test3c:
+; SSE41: # BB#0:
+; SSE41-NEXT: pxor %xmm1, %xmm0
+; SSE41-NEXT: pshufd {{.*#+}} xmm0 = xmm0[0,2,2,3]
+; SSE41-NEXT: movq {{.*#+}} xmm0 = xmm0[0],zero
+; SSE41-NEXT: retq
+;
+; AVX-LABEL: combine_bitwise_ops_test3c:
+; AVX: # BB#0:
+; AVX-NEXT: vpxor %xmm1, %xmm0, %xmm0
+; AVX-NEXT: vpshufd {{.*#+}} xmm0 = xmm0[0,2,2,3]
+; AVX-NEXT: vmovq {{.*#+}} xmm0 = xmm0[0],zero
+; AVX-NEXT: retq
+ %shuf1 = shufflevector <4 x i32> %a, <4 x i32> %c, <4 x i32><i32 0, i32 2, i32 5, i32 7>
+ %shuf2 = shufflevector <4 x i32> %b, <4 x i32> %c, <4 x i32><i32 0, i32 2, i32 5, i32 7>
+ %xor = xor <4 x i32> %shuf1, %shuf2
+ ret <4 x i32> %xor
+}
+
+define <4 x i32> @combine_bitwise_ops_test4c(<4 x i32> %a, <4 x i32> %b, <4 x i32> %c) {
+; SSE2-LABEL: combine_bitwise_ops_test4c:
+; SSE2: # BB#0:
+; SSE2-NEXT: pand %xmm1, %xmm0
+; SSE2-NEXT: pshufd {{.*#+}} xmm1 = xmm0[1,3,2,3]
+; SSE2-NEXT: pshufd {{.*#+}} xmm0 = xmm2[0,2,2,3]
+; SSE2-NEXT: punpcklqdq {{.*#+}} xmm0 = xmm0[0],xmm1[0]
+; SSE2-NEXT: retq
+;
+; SSSE3-LABEL: combine_bitwise_ops_test4c:
+; SSSE3: # BB#0:
+; SSSE3-NEXT: pand %xmm1, %xmm0
+; SSSE3-NEXT: pshufd {{.*#+}} xmm1 = xmm0[1,3,2,3]
+; SSSE3-NEXT: pshufd {{.*#+}} xmm0 = xmm2[0,2,2,3]
+; SSSE3-NEXT: punpcklqdq {{.*#+}} xmm0 = xmm0[0],xmm1[0]
+; SSSE3-NEXT: retq
+;
+; SSE41-LABEL: combine_bitwise_ops_test4c:
+; SSE41: # BB#0:
+; SSE41-NEXT: pand %xmm1, %xmm0
+; SSE41-NEXT: pblendw {{.*#+}} xmm0 = xmm2[0,1],xmm0[2,3],xmm2[4,5],xmm0[6,7]
+; SSE41-NEXT: pshufd {{.*#+}} xmm0 = xmm0[0,2,1,3]
+; SSE41-NEXT: retq
+;
+; AVX1-LABEL: combine_bitwise_ops_test4c:
+; AVX1: # BB#0:
+; AVX1-NEXT: vpand %xmm1, %xmm0, %xmm0
+; AVX1-NEXT: vpblendw {{.*#+}} xmm0 = xmm2[0,1],xmm0[2,3],xmm2[4,5],xmm0[6,7]
+; AVX1-NEXT: vpshufd {{.*#+}} xmm0 = xmm0[0,2,1,3]
+; AVX1-NEXT: retq
+;
+; AVX2-LABEL: combine_bitwise_ops_test4c:
+; AVX2: # BB#0:
+; AVX2-NEXT: vpand %xmm1, %xmm0, %xmm0
+; AVX2-NEXT: vpblendd {{.*#+}} xmm0 = xmm2[0],xmm0[1],xmm2[2],xmm0[3]
+; AVX2-NEXT: vpshufd {{.*#+}} xmm0 = xmm0[0,2,1,3]
+; AVX2-NEXT: retq
+ %shuf1 = shufflevector <4 x i32> %c, <4 x i32> %a, <4 x i32><i32 0, i32 2, i32 5, i32 7>
+ %shuf2 = shufflevector <4 x i32> %c, <4 x i32> %b, <4 x i32><i32 0, i32 2, i32 5, i32 7>
+ %and = and <4 x i32> %shuf1, %shuf2
+ ret <4 x i32> %and
+}
+
+define <4 x i32> @combine_bitwise_ops_test5c(<4 x i32> %a, <4 x i32> %b, <4 x i32> %c) {
+; SSE2-LABEL: combine_bitwise_ops_test5c:
+; SSE2: # BB#0:
+; SSE2-NEXT: por %xmm1, %xmm0
+; SSE2-NEXT: pshufd {{.*#+}} xmm1 = xmm0[1,3,2,3]
+; SSE2-NEXT: pshufd {{.*#+}} xmm0 = xmm2[0,2,2,3]
+; SSE2-NEXT: punpcklqdq {{.*#+}} xmm0 = xmm0[0],xmm1[0]
+; SSE2-NEXT: retq
+;
+; SSSE3-LABEL: combine_bitwise_ops_test5c:
+; SSSE3: # BB#0:
+; SSSE3-NEXT: por %xmm1, %xmm0
+; SSSE3-NEXT: pshufd {{.*#+}} xmm1 = xmm0[1,3,2,3]
+; SSSE3-NEXT: pshufd {{.*#+}} xmm0 = xmm2[0,2,2,3]
+; SSSE3-NEXT: punpcklqdq {{.*#+}} xmm0 = xmm0[0],xmm1[0]
+; SSSE3-NEXT: retq
+;
+; SSE41-LABEL: combine_bitwise_ops_test5c:
+; SSE41: # BB#0:
+; SSE41-NEXT: por %xmm1, %xmm0
+; SSE41-NEXT: pblendw {{.*#+}} xmm0 = xmm2[0,1],xmm0[2,3],xmm2[4,5],xmm0[6,7]
+; SSE41-NEXT: pshufd {{.*#+}} xmm0 = xmm0[0,2,1,3]
+; SSE41-NEXT: retq
+;
+; AVX1-LABEL: combine_bitwise_ops_test5c:
+; AVX1: # BB#0:
+; AVX1-NEXT: vpor %xmm1, %xmm0, %xmm0
+; AVX1-NEXT: vpblendw {{.*#+}} xmm0 = xmm2[0,1],xmm0[2,3],xmm2[4,5],xmm0[6,7]
+; AVX1-NEXT: vpshufd {{.*#+}} xmm0 = xmm0[0,2,1,3]
+; AVX1-NEXT: retq
+;
+; AVX2-LABEL: combine_bitwise_ops_test5c:
+; AVX2: # BB#0:
+; AVX2-NEXT: vpor %xmm1, %xmm0, %xmm0
+; AVX2-NEXT: vpblendd {{.*#+}} xmm0 = xmm2[0],xmm0[1],xmm2[2],xmm0[3]
+; AVX2-NEXT: vpshufd {{.*#+}} xmm0 = xmm0[0,2,1,3]
+; AVX2-NEXT: retq
+ %shuf1 = shufflevector <4 x i32> %c, <4 x i32> %a, <4 x i32><i32 0, i32 2, i32 5, i32 7>
+ %shuf2 = shufflevector <4 x i32> %c, <4 x i32> %b, <4 x i32><i32 0, i32 2, i32 5, i32 7>
+ %or = or <4 x i32> %shuf1, %shuf2
+ ret <4 x i32> %or
+}
+
+define <4 x i32> @combine_bitwise_ops_test6c(<4 x i32> %a, <4 x i32> %b, <4 x i32> %c) {
+; SSE2-LABEL: combine_bitwise_ops_test6c:
+; SSE2: # BB#0:
+; SSE2-NEXT: pxor %xmm1, %xmm0
+; SSE2-NEXT: pshufd {{.*#+}} xmm1 = xmm0[1,3,2,3]
+; SSE2-NEXT: pxor %xmm0, %xmm0
+; SSE2-NEXT: punpcklqdq {{.*#+}} xmm0 = xmm0[0],xmm1[0]
+; SSE2-NEXT: retq
+;
+; SSSE3-LABEL: combine_bitwise_ops_test6c:
+; SSSE3: # BB#0:
+; SSSE3-NEXT: pxor %xmm1, %xmm0
+; SSSE3-NEXT: pshufd {{.*#+}} xmm1 = xmm0[1,3,2,3]
+; SSSE3-NEXT: pxor %xmm0, %xmm0
+; SSSE3-NEXT: punpcklqdq {{.*#+}} xmm0 = xmm0[0],xmm1[0]
+; SSSE3-NEXT: retq
+;
+; SSE41-LABEL: combine_bitwise_ops_test6c:
+; SSE41: # BB#0:
+; SSE41-NEXT: pxor %xmm1, %xmm0
+; SSE41-NEXT: pshufd {{.*#+}} xmm1 = xmm0[0,1,1,3]
+; SSE41-NEXT: pxor %xmm0, %xmm0
+; SSE41-NEXT: pblendw {{.*#+}} xmm0 = xmm0[0,1,2,3],xmm1[4,5,6,7]
+; SSE41-NEXT: retq
+;
+; AVX1-LABEL: combine_bitwise_ops_test6c:
+; AVX1: # BB#0:
+; AVX1-NEXT: vpxor %xmm1, %xmm0, %xmm0
+; AVX1-NEXT: vpshufd {{.*#+}} xmm0 = xmm0[0,1,1,3]
+; AVX1-NEXT: vpxor %xmm1, %xmm1, %xmm1
+; AVX1-NEXT: vpblendw {{.*#+}} xmm0 = xmm1[0,1,2,3],xmm0[4,5,6,7]
+; AVX1-NEXT: retq
+;
+; AVX2-LABEL: combine_bitwise_ops_test6c:
+; AVX2: # BB#0:
+; AVX2-NEXT: vpxor %xmm1, %xmm0, %xmm0
+; AVX2-NEXT: vpshufd {{.*#+}} xmm0 = xmm0[0,1,1,3]
+; AVX2-NEXT: vpxor %xmm1, %xmm1, %xmm1
+; AVX2-NEXT: vpblendd {{.*#+}} xmm0 = xmm1[0,1],xmm0[2,3]
+; AVX2-NEXT: retq
+ %shuf1 = shufflevector <4 x i32> %c, <4 x i32> %a, <4 x i32><i32 0, i32 2, i32 5, i32 7>
+ %shuf2 = shufflevector <4 x i32> %c, <4 x i32> %b, <4 x i32><i32 0, i32 2, i32 5, i32 7>
+ %xor = xor <4 x i32> %shuf1, %shuf2
+ ret <4 x i32> %xor
+}
+
+define <4 x i32> @combine_nested_undef_test1(<4 x i32> %A, <4 x i32> %B) {
+; SSE-LABEL: combine_nested_undef_test1:
+; SSE: # BB#0:
+; SSE-NEXT: pshufd {{.*#+}} xmm0 = xmm0[3,1,0,1]
+; SSE-NEXT: retq
+;
+; AVX-LABEL: combine_nested_undef_test1:
+; AVX: # BB#0:
+; AVX-NEXT: vpshufd {{.*#+}} xmm0 = xmm0[3,1,0,1]
+; AVX-NEXT: retq
+ %1 = shufflevector <4 x i32> %A, <4 x i32> %B, <4 x i32> <i32 0, i32 4, i32 3, i32 1>
+ %2 = shufflevector <4 x i32> %1, <4 x i32> undef, <4 x i32> <i32 2, i32 4, i32 0, i32 3>
+ ret <4 x i32> %2
+}
+
+define <4 x i32> @combine_nested_undef_test2(<4 x i32> %A, <4 x i32> %B) {
+; SSE-LABEL: combine_nested_undef_test2:
+; SSE: # BB#0:
+; SSE-NEXT: pshufd {{.*#+}} xmm0 = xmm0[2,1,0,3]
+; SSE-NEXT: retq
+;
+; AVX-LABEL: combine_nested_undef_test2:
+; AVX: # BB#0:
+; AVX-NEXT: vpshufd {{.*#+}} xmm0 = xmm0[2,1,0,3]
+; AVX-NEXT: retq
+ %1 = shufflevector <4 x i32> %A, <4 x i32> %B, <4 x i32> <i32 0, i32 5, i32 2, i32 3>
+ %2 = shufflevector <4 x i32> %1, <4 x i32> undef, <4 x i32> <i32 2, i32 4, i32 0, i32 3>
+ ret <4 x i32> %2
+}
+
+define <4 x i32> @combine_nested_undef_test3(<4 x i32> %A, <4 x i32> %B) {
+; SSE-LABEL: combine_nested_undef_test3:
+; SSE: # BB#0:
+; SSE-NEXT: pshufd {{.*#+}} xmm0 = xmm0[2,1,0,3]
+; SSE-NEXT: retq
+;
+; AVX-LABEL: combine_nested_undef_test3:
+; AVX: # BB#0:
+; AVX-NEXT: vpshufd {{.*#+}} xmm0 = xmm0[2,1,0,3]
+; AVX-NEXT: retq
+ %1 = shufflevector <4 x i32> %A, <4 x i32> %B, <4 x i32> <i32 0, i32 6, i32 2, i32 3>
+ %2 = shufflevector <4 x i32> %1, <4 x i32> undef, <4 x i32> <i32 2, i32 4, i32 0, i32 3>
+ ret <4 x i32> %2
+}
+
+define <4 x i32> @combine_nested_undef_test4(<4 x i32> %A, <4 x i32> %B) {
+; SSE-LABEL: combine_nested_undef_test4:
+; SSE: # BB#0:
+; SSE-NEXT: pshufd {{.*#+}} xmm0 = xmm0[0,1,0,1]
+; SSE-NEXT: retq
+;
+; AVX1-LABEL: combine_nested_undef_test4:
+; AVX1: # BB#0:
+; AVX1-NEXT: vpshufd {{.*#+}} xmm0 = xmm0[0,1,0,1]
+; AVX1-NEXT: retq
+;
+; AVX2-LABEL: combine_nested_undef_test4:
+; AVX2: # BB#0:
+; AVX2-NEXT: vpbroadcastq %xmm0, %xmm0
+; AVX2-NEXT: retq
+ %1 = shufflevector <4 x i32> %A, <4 x i32> %B, <4 x i32> <i32 0, i32 4, i32 7, i32 1>
+ %2 = shufflevector <4 x i32> %1, <4 x i32> undef, <4 x i32> <i32 4, i32 4, i32 0, i32 3>
+ ret <4 x i32> %2
+}
+
+define <4 x i32> @combine_nested_undef_test5(<4 x i32> %A, <4 x i32> %B) {
+; SSE-LABEL: combine_nested_undef_test5:
+; SSE: # BB#0:
+; SSE-NEXT: pshufd {{.*#+}} xmm0 = xmm0[2,3,2,3]
+; SSE-NEXT: retq
+;
+; AVX-LABEL: combine_nested_undef_test5:
+; AVX: # BB#0:
+; AVX-NEXT: vpshufd {{.*#+}} xmm0 = xmm0[2,3,2,3]
+; AVX-NEXT: retq
+ %1 = shufflevector <4 x i32> %A, <4 x i32> %B, <4 x i32> <i32 5, i32 5, i32 2, i32 3>
+ %2 = shufflevector <4 x i32> %1, <4 x i32> undef, <4 x i32> <i32 2, i32 4, i32 4, i32 3>
+ ret <4 x i32> %2
+}
+
+define <4 x i32> @combine_nested_undef_test6(<4 x i32> %A, <4 x i32> %B) {
+; SSE-LABEL: combine_nested_undef_test6:
+; SSE: # BB#0:
+; SSE-NEXT: pshufd {{.*#+}} xmm0 = xmm0[2,3,0,1]
+; SSE-NEXT: retq
+;
+; AVX-LABEL: combine_nested_undef_test6:
+; AVX: # BB#0:
+; AVX-NEXT: vpshufd {{.*#+}} xmm0 = xmm0[2,3,0,1]
+; AVX-NEXT: retq
+ %1 = shufflevector <4 x i32> %A, <4 x i32> %B, <4 x i32> <i32 0, i32 6, i32 2, i32 4>
+ %2 = shufflevector <4 x i32> %1, <4 x i32> undef, <4 x i32> <i32 2, i32 4, i32 0, i32 4>
+ ret <4 x i32> %2
+}
+
+define <4 x i32> @combine_nested_undef_test7(<4 x i32> %A, <4 x i32> %B) {
+; SSE-LABEL: combine_nested_undef_test7:
+; SSE: # BB#0:
+; SSE-NEXT: pshufd {{.*#+}} xmm0 = xmm0[0,2,0,2]
+; SSE-NEXT: retq
+;
+; AVX-LABEL: combine_nested_undef_test7:
+; AVX: # BB#0:
+; AVX-NEXT: vpshufd {{.*#+}} xmm0 = xmm0[0,2,0,2]
+; AVX-NEXT: retq
+ %1 = shufflevector <4 x i32> %A, <4 x i32> %B, <4 x i32> <i32 0, i32 5, i32 2, i32 7>
+ %2 = shufflevector <4 x i32> %1, <4 x i32> undef, <4 x i32> <i32 0, i32 2, i32 0, i32 2>
+ ret <4 x i32> %2
+}
+
+define <4 x i32> @combine_nested_undef_test8(<4 x i32> %A, <4 x i32> %B) {
+; SSE-LABEL: combine_nested_undef_test8:
+; SSE: # BB#0:
+; SSE-NEXT: pshufd {{.*#+}} xmm0 = xmm0[1,1,3,3]
+; SSE-NEXT: retq
+;
+; AVX-LABEL: combine_nested_undef_test8:
+; AVX: # BB#0:
+; AVX-NEXT: vpshufd {{.*#+}} xmm0 = xmm0[1,1,3,3]
+; AVX-NEXT: retq
+ %1 = shufflevector <4 x i32> %A, <4 x i32> %B, <4 x i32> <i32 4, i32 1, i32 6, i32 3>
+ %2 = shufflevector <4 x i32> %1, <4 x i32> undef, <4 x i32> <i32 1, i32 4, i32 3, i32 4>
+ ret <4 x i32> %2
+}
+
+define <4 x i32> @combine_nested_undef_test9(<4 x i32> %A, <4 x i32> %B) {
+; SSE-LABEL: combine_nested_undef_test9:
+; SSE: # BB#0:
+; SSE-NEXT: pshufd {{.*#+}} xmm0 = xmm0[1,3,2,2]
+; SSE-NEXT: retq
+;
+; AVX-LABEL: combine_nested_undef_test9:
+; AVX: # BB#0:
+; AVX-NEXT: vpshufd {{.*#+}} xmm0 = xmm0[1,3,2,2]
+; AVX-NEXT: retq
+ %1 = shufflevector <4 x i32> %A, <4 x i32> %B, <4 x i32> <i32 1, i32 3, i32 2, i32 5>
+ %2 = shufflevector <4 x i32> %1, <4 x i32> undef, <4 x i32> <i32 0, i32 1, i32 4, i32 2>
+ ret <4 x i32> %2
+}
+
+define <4 x i32> @combine_nested_undef_test10(<4 x i32> %A, <4 x i32> %B) {
+; SSE-LABEL: combine_nested_undef_test10:
+; SSE: # BB#0:
+; SSE-NEXT: pshufd {{.*#+}} xmm0 = xmm0[1,1,1,3]
+; SSE-NEXT: retq
+;
+; AVX-LABEL: combine_nested_undef_test10:
+; AVX: # BB#0:
+; AVX-NEXT: vpshufd {{.*#+}} xmm0 = xmm0[1,1,1,3]
+; AVX-NEXT: retq
+ %1 = shufflevector <4 x i32> %A, <4 x i32> %B, <4 x i32> <i32 1, i32 1, i32 5, i32 5>
+ %2 = shufflevector <4 x i32> %1, <4 x i32> undef, <4 x i32> <i32 0, i32 4, i32 1, i32 4>
+ ret <4 x i32> %2
+}
+
+define <4 x i32> @combine_nested_undef_test11(<4 x i32> %A, <4 x i32> %B) {
+; SSE-LABEL: combine_nested_undef_test11:
+; SSE: # BB#0:
+; SSE-NEXT: pshufd {{.*#+}} xmm0 = xmm0[1,1,2,1]
+; SSE-NEXT: retq
+;
+; AVX-LABEL: combine_nested_undef_test11:
+; AVX: # BB#0:
+; AVX-NEXT: vpshufd {{.*#+}} xmm0 = xmm0[1,1,2,1]
+; AVX-NEXT: retq
+ %1 = shufflevector <4 x i32> %A, <4 x i32> %B, <4 x i32> <i32 1, i32 2, i32 5, i32 4>
+ %2 = shufflevector <4 x i32> %1, <4 x i32> undef, <4 x i32> <i32 0, i32 4, i32 1, i32 0>
+ ret <4 x i32> %2
+}
+
+define <4 x i32> @combine_nested_undef_test12(<4 x i32> %A, <4 x i32> %B) {
+; SSE-LABEL: combine_nested_undef_test12:
+; SSE: # BB#0:
+; SSE-NEXT: pshufd {{.*#+}} xmm0 = xmm0[0,1,0,1]
+; SSE-NEXT: retq
+;
+; AVX1-LABEL: combine_nested_undef_test12:
+; AVX1: # BB#0:
+; AVX1-NEXT: vpshufd {{.*#+}} xmm0 = xmm0[0,1,0,1]
+; AVX1-NEXT: retq
+;
+; AVX2-LABEL: combine_nested_undef_test12:
+; AVX2: # BB#0:
+; AVX2-NEXT: vpbroadcastq %xmm0, %xmm0
+; AVX2-NEXT: retq
+ %1 = shufflevector <4 x i32> %A, <4 x i32> %B, <4 x i32> <i32 0, i32 0, i32 2, i32 4>
+ %2 = shufflevector <4 x i32> %1, <4 x i32> undef, <4 x i32> <i32 1, i32 4, i32 0, i32 4>
+ ret <4 x i32> %2
+}
+
+; The following pair of shuffles is folded into vector %A.
+define <4 x i32> @combine_nested_undef_test13(<4 x i32> %A, <4 x i32> %B) {
+; ALL-LABEL: combine_nested_undef_test13:
+; ALL: # BB#0:
+; ALL-NEXT: retq
+ %1 = shufflevector <4 x i32> %A, <4 x i32> %B, <4 x i32> <i32 1, i32 4, i32 2, i32 6>
+ %2 = shufflevector <4 x i32> %1, <4 x i32> undef, <4 x i32> <i32 4, i32 0, i32 2, i32 4>
+ ret <4 x i32> %2
+}
+
+; The following pair of shuffles is folded into vector %B.
+define <4 x i32> @combine_nested_undef_test14(<4 x i32> %A, <4 x i32> %B) {
+; SSE-LABEL: combine_nested_undef_test14:
+; SSE: # BB#0:
+; SSE-NEXT: movaps %xmm1, %xmm0
+; SSE-NEXT: retq
+;
+; AVX-LABEL: combine_nested_undef_test14:
+; AVX: # BB#0:
+; AVX-NEXT: vmovaps %xmm1, %xmm0
+; AVX-NEXT: retq
+ %1 = shufflevector <4 x i32> %A, <4 x i32> %B, <4 x i32> <i32 0, i32 6, i32 2, i32 4>
+ %2 = shufflevector <4 x i32> %1, <4 x i32> undef, <4 x i32> <i32 3, i32 4, i32 1, i32 4>
+ ret <4 x i32> %2
+}
+
+
+; Verify that we don't optimize the following cases. We expect more than one shuffle.
+;
+; FIXME: Many of these already don't make sense, and the rest should stop
+; making sense with th enew vector shuffle lowering. Revisit at least testing for
+; it.
+
+define <4 x i32> @combine_nested_undef_test15(<4 x i32> %A, <4 x i32> %B) {
+; SSE2-LABEL: combine_nested_undef_test15:
+; SSE2: # BB#0:
+; SSE2-NEXT: shufps {{.*#+}} xmm1 = xmm1[0,0],xmm0[3,0]
+; SSE2-NEXT: shufps {{.*#+}} xmm1 = xmm1[2,0],xmm0[0,1]
+; SSE2-NEXT: movaps %xmm1, %xmm0
+; SSE2-NEXT: retq
+;
+; SSSE3-LABEL: combine_nested_undef_test15:
+; SSSE3: # BB#0:
+; SSSE3-NEXT: shufps {{.*#+}} xmm1 = xmm1[0,0],xmm0[3,0]
+; SSSE3-NEXT: shufps {{.*#+}} xmm1 = xmm1[2,0],xmm0[0,1]
+; SSSE3-NEXT: movaps %xmm1, %xmm0
+; SSSE3-NEXT: retq
+;
+; SSE41-LABEL: combine_nested_undef_test15:
+; SSE41: # BB#0:
+; SSE41-NEXT: pshufd {{.*#+}} xmm1 = xmm1[0,0,1,1]
+; SSE41-NEXT: pshufd {{.*#+}} xmm0 = xmm0[3,1,0,1]
+; SSE41-NEXT: pblendw {{.*#+}} xmm0 = xmm0[0,1],xmm1[2,3],xmm0[4,5,6,7]
+; SSE41-NEXT: retq
+;
+; AVX1-LABEL: combine_nested_undef_test15:
+; AVX1: # BB#0:
+; AVX1-NEXT: vpshufd {{.*#+}} xmm1 = xmm1[0,0,1,1]
+; AVX1-NEXT: vpshufd {{.*#+}} xmm0 = xmm0[3,1,0,1]
+; AVX1-NEXT: vpblendw {{.*#+}} xmm0 = xmm0[0,1],xmm1[2,3],xmm0[4,5,6,7]
+; AVX1-NEXT: retq
+;
+; AVX2-LABEL: combine_nested_undef_test15:
+; AVX2: # BB#0:
+; AVX2-NEXT: vpbroadcastd %xmm1, %xmm1
+; AVX2-NEXT: vpshufd {{.*#+}} xmm0 = xmm0[3,1,0,1]
+; AVX2-NEXT: vpblendd {{.*#+}} xmm0 = xmm0[0],xmm1[1],xmm0[2,3]
+; AVX2-NEXT: retq
+ %1 = shufflevector <4 x i32> %A, <4 x i32> %B, <4 x i32> <i32 0, i32 4, i32 3, i32 1>
+ %2 = shufflevector <4 x i32> %1, <4 x i32> undef, <4 x i32> <i32 2, i32 1, i32 0, i32 3>
+ ret <4 x i32> %2
+}
+
+define <4 x i32> @combine_nested_undef_test16(<4 x i32> %A, <4 x i32> %B) {
+; SSE2-LABEL: combine_nested_undef_test16:
+; SSE2: # BB#0:
+; SSE2-NEXT: pshufd {{.*#+}} xmm1 = xmm1[1,3,2,3]
+; SSE2-NEXT: pshufd {{.*#+}} xmm0 = xmm0[2,0,2,3]
+; SSE2-NEXT: punpckldq {{.*#+}} xmm0 = xmm0[0],xmm1[0],xmm0[1],xmm1[1]
+; SSE2-NEXT: retq
+;
+; SSSE3-LABEL: combine_nested_undef_test16:
+; SSSE3: # BB#0:
+; SSSE3-NEXT: pshufd {{.*#+}} xmm1 = xmm1[1,3,2,3]
+; SSSE3-NEXT: pshufd {{.*#+}} xmm0 = xmm0[2,0,2,3]
+; SSSE3-NEXT: punpckldq {{.*#+}} xmm0 = xmm0[0],xmm1[0],xmm0[1],xmm1[1]
+; SSSE3-NEXT: retq
+;
+; SSE41-LABEL: combine_nested_undef_test16:
+; SSE41: # BB#0:
+; SSE41-NEXT: pshufd {{.*#+}} xmm0 = xmm0[2,3,0,1]
+; SSE41-NEXT: pblendw {{.*#+}} xmm0 = xmm0[0,1],xmm1[2,3],xmm0[4,5],xmm1[6,7]
+; SSE41-NEXT: retq
+;
+; AVX1-LABEL: combine_nested_undef_test16:
+; AVX1: # BB#0:
+; AVX1-NEXT: vpshufd {{.*#+}} xmm0 = xmm0[2,3,0,1]
+; AVX1-NEXT: vpblendw {{.*#+}} xmm0 = xmm0[0,1],xmm1[2,3],xmm0[4,5],xmm1[6,7]
+; AVX1-NEXT: retq
+;
+; AVX2-LABEL: combine_nested_undef_test16:
+; AVX2: # BB#0:
+; AVX2-NEXT: vpshufd {{.*#+}} xmm0 = xmm0[2,3,0,1]
+; AVX2-NEXT: vpblendd {{.*#+}} xmm0 = xmm0[0],xmm1[1],xmm0[2],xmm1[3]
+; AVX2-NEXT: retq
+ %1 = shufflevector <4 x i32> %A, <4 x i32> %B, <4 x i32> <i32 0, i32 5, i32 2, i32 7>
+ %2 = shufflevector <4 x i32> %1, <4 x i32> undef, <4 x i32> <i32 2, i32 1, i32 0, i32 3>
+ ret <4 x i32> %2
+}
+
+define <4 x i32> @combine_nested_undef_test17(<4 x i32> %A, <4 x i32> %B) {
+; SSE2-LABEL: combine_nested_undef_test17:
+; SSE2: # BB#0:
+; SSE2-NEXT: shufps {{.*#+}} xmm1 = xmm1[0,0],xmm0[1,0]
+; SSE2-NEXT: shufps {{.*#+}} xmm0 = xmm0[3,1],xmm1[0,2]
+; SSE2-NEXT: retq
+;
+; SSSE3-LABEL: combine_nested_undef_test17:
+; SSSE3: # BB#0:
+; SSSE3-NEXT: shufps {{.*#+}} xmm1 = xmm1[0,0],xmm0[1,0]
+; SSSE3-NEXT: shufps {{.*#+}} xmm0 = xmm0[3,1],xmm1[0,2]
+; SSSE3-NEXT: retq
+;
+; SSE41-LABEL: combine_nested_undef_test17:
+; SSE41: # BB#0:
+; SSE41-NEXT: pblendw {{.*#+}} xmm0 = xmm1[0,1],xmm0[2,3,4,5,6,7]
+; SSE41-NEXT: pshufd {{.*#+}} xmm0 = xmm0[3,1,0,1]
+; SSE41-NEXT: retq
+;
+; AVX1-LABEL: combine_nested_undef_test17:
+; AVX1: # BB#0:
+; AVX1-NEXT: vpblendw {{.*#+}} xmm0 = xmm1[0,1],xmm0[2,3,4,5,6,7]
+; AVX1-NEXT: vpshufd {{.*#+}} xmm0 = xmm0[3,1,0,1]
+; AVX1-NEXT: retq
+;
+; AVX2-LABEL: combine_nested_undef_test17:
+; AVX2: # BB#0:
+; AVX2-NEXT: vpblendd {{.*#+}} xmm0 = xmm1[0],xmm0[1,2,3]
+; AVX2-NEXT: vpshufd {{.*#+}} xmm0 = xmm0[3,1,0,1]
+; AVX2-NEXT: retq
+ %1 = shufflevector <4 x i32> %A, <4 x i32> %B, <4 x i32> <i32 4, i32 1, i32 3, i32 1>
+ %2 = shufflevector <4 x i32> %1, <4 x i32> undef, <4 x i32> <i32 2, i32 1, i32 0, i32 3>
+ ret <4 x i32> %2
+}
+
+define <4 x i32> @combine_nested_undef_test18(<4 x i32> %A, <4 x i32> %B) {
+; SSE-LABEL: combine_nested_undef_test18:
+; SSE: # BB#0:
+; SSE-NEXT: pshufd {{.*#+}} xmm0 = xmm1[1,1,0,3]
+; SSE-NEXT: retq
+;
+; AVX-LABEL: combine_nested_undef_test18:
+; AVX: # BB#0:
+; AVX-NEXT: vpshufd {{.*#+}} xmm0 = xmm1[1,1,0,3]
+; AVX-NEXT: retq
+ %1 = shufflevector <4 x i32> %A, <4 x i32> %B, <4 x i32> <i32 4, i32 5, i32 2, i32 7>
+ %2 = shufflevector <4 x i32> %1, <4 x i32> undef, <4 x i32> <i32 1, i32 1, i32 0, i32 3>
+ ret <4 x i32> %2
+}
+
+define <4 x i32> @combine_nested_undef_test19(<4 x i32> %A, <4 x i32> %B) {
+; SSE2-LABEL: combine_nested_undef_test19:
+; SSE2: # BB#0:
+; SSE2-NEXT: shufps {{.*#+}} xmm1 = xmm1[1,0],xmm0[0,0]
+; SSE2-NEXT: shufps {{.*#+}} xmm1 = xmm1[0,2],xmm0[0,0]
+; SSE2-NEXT: movaps %xmm1, %xmm0
+; SSE2-NEXT: retq
+;
+; SSSE3-LABEL: combine_nested_undef_test19:
+; SSSE3: # BB#0:
+; SSSE3-NEXT: shufps {{.*#+}} xmm1 = xmm1[1,0],xmm0[0,0]
+; SSSE3-NEXT: shufps {{.*#+}} xmm1 = xmm1[0,2],xmm0[0,0]
+; SSSE3-NEXT: movaps %xmm1, %xmm0
+; SSSE3-NEXT: retq
+;
+; SSE41-LABEL: combine_nested_undef_test19:
+; SSE41: # BB#0:
+; SSE41-NEXT: pblendw {{.*#+}} xmm0 = xmm0[0,1],xmm1[2,3],xmm0[4,5,6,7]
+; SSE41-NEXT: pshufd {{.*#+}} xmm0 = xmm0[1,0,0,0]
+; SSE41-NEXT: retq
+;
+; AVX1-LABEL: combine_nested_undef_test19:
+; AVX1: # BB#0:
+; AVX1-NEXT: vpblendw {{.*#+}} xmm0 = xmm0[0,1],xmm1[2,3],xmm0[4,5,6,7]
+; AVX1-NEXT: vpshufd {{.*#+}} xmm0 = xmm0[1,0,0,0]
+; AVX1-NEXT: retq
+;
+; AVX2-LABEL: combine_nested_undef_test19:
+; AVX2: # BB#0:
+; AVX2-NEXT: vpblendd {{.*#+}} xmm0 = xmm0[0],xmm1[1],xmm0[2,3]
+; AVX2-NEXT: vpshufd {{.*#+}} xmm0 = xmm0[1,0,0,0]
+; AVX2-NEXT: retq
+ %1 = shufflevector <4 x i32> %A, <4 x i32> %B, <4 x i32> <i32 0, i32 4, i32 5, i32 6>
+ %2 = shufflevector <4 x i32> %1, <4 x i32> undef, <4 x i32> <i32 2, i32 0, i32 0, i32 0>
+ ret <4 x i32> %2
+}
+
+define <4 x i32> @combine_nested_undef_test20(<4 x i32> %A, <4 x i32> %B) {
+; SSE2-LABEL: combine_nested_undef_test20:
+; SSE2: # BB#0:
+; SSE2-NEXT: shufps {{.*#+}} xmm1 = xmm1[0,0],xmm0[2,3]
+; SSE2-NEXT: shufps {{.*#+}} xmm1 = xmm1[0,2,3,1]
+; SSE2-NEXT: movaps %xmm1, %xmm0
+; SSE2-NEXT: retq
+;
+; SSSE3-LABEL: combine_nested_undef_test20:
+; SSSE3: # BB#0:
+; SSSE3-NEXT: shufps {{.*#+}} xmm1 = xmm1[0,0],xmm0[2,3]
+; SSSE3-NEXT: shufps {{.*#+}} xmm1 = xmm1[0,2,3,1]
+; SSSE3-NEXT: movaps %xmm1, %xmm0
+; SSSE3-NEXT: retq
+;
+; SSE41-LABEL: combine_nested_undef_test20:
+; SSE41: # BB#0:
+; SSE41-NEXT: pblendw {{.*#+}} xmm0 = xmm1[0,1,2,3],xmm0[4,5,6,7]
+; SSE41-NEXT: pshufd {{.*#+}} xmm0 = xmm0[0,2,3,0]
+; SSE41-NEXT: retq
+;
+; AVX1-LABEL: combine_nested_undef_test20:
+; AVX1: # BB#0:
+; AVX1-NEXT: vpblendw {{.*#+}} xmm0 = xmm1[0,1,2,3],xmm0[4,5,6,7]
+; AVX1-NEXT: vpshufd {{.*#+}} xmm0 = xmm0[0,2,3,0]
+; AVX1-NEXT: retq
+;
+; AVX2-LABEL: combine_nested_undef_test20:
+; AVX2: # BB#0:
+; AVX2-NEXT: vpblendd {{.*#+}} xmm0 = xmm1[0,1],xmm0[2,3]
+; AVX2-NEXT: vpshufd {{.*#+}} xmm0 = xmm0[0,2,3,0]
+; AVX2-NEXT: retq
+ %1 = shufflevector <4 x i32> %A, <4 x i32> %B, <4 x i32> <i32 3, i32 2, i32 4, i32 4>
+ %2 = shufflevector <4 x i32> %1, <4 x i32> undef, <4 x i32> <i32 2, i32 1, i32 0, i32 3>
+ ret <4 x i32> %2
+}
+
+define <4 x i32> @combine_nested_undef_test21(<4 x i32> %A, <4 x i32> %B) {
+; SSE2-LABEL: combine_nested_undef_test21:
+; SSE2: # BB#0:
+; SSE2-NEXT: pshufd {{.*#+}} xmm2 = xmm0[1,1,2,3]
+; SSE2-NEXT: pshufd {{.*#+}} xmm0 = xmm1[0,0,1,1]
+; SSE2-NEXT: punpckldq {{.*#+}} xmm0 = xmm0[0],xmm2[0],xmm0[1],xmm2[1]
+; SSE2-NEXT: retq
+;
+; SSSE3-LABEL: combine_nested_undef_test21:
+; SSSE3: # BB#0:
+; SSSE3-NEXT: pshufd {{.*#+}} xmm2 = xmm0[1,1,2,3]
+; SSSE3-NEXT: pshufd {{.*#+}} xmm0 = xmm1[0,0,1,1]
+; SSSE3-NEXT: punpckldq {{.*#+}} xmm0 = xmm0[0],xmm2[0],xmm0[1],xmm2[1]
+; SSSE3-NEXT: retq
+;
+; SSE41-LABEL: combine_nested_undef_test21:
+; SSE41: # BB#0:
+; SSE41-NEXT: pblendw {{.*#+}} xmm0 = xmm1[0,1],xmm0[2,3],xmm1[4,5,6,7]
+; SSE41-NEXT: pshufd {{.*#+}} xmm0 = xmm0[0,1,0,1]
+; SSE41-NEXT: retq
+;
+; AVX1-LABEL: combine_nested_undef_test21:
+; AVX1: # BB#0:
+; AVX1-NEXT: vpblendw {{.*#+}} xmm0 = xmm1[0,1],xmm0[2,3],xmm1[4,5,6,7]
+; AVX1-NEXT: vpshufd {{.*#+}} xmm0 = xmm0[0,1,0,1]
+; AVX1-NEXT: retq
+;
+; AVX2-LABEL: combine_nested_undef_test21:
+; AVX2: # BB#0:
+; AVX2-NEXT: vpblendd {{.*#+}} xmm0 = xmm1[0],xmm0[1],xmm1[2,3]
+; AVX2-NEXT: vpbroadcastq %xmm0, %xmm0
+; AVX2-NEXT: retq
+ %1 = shufflevector <4 x i32> %A, <4 x i32> %B, <4 x i32> <i32 4, i32 1, i32 3, i32 1>
+ %2 = shufflevector <4 x i32> %1, <4 x i32> undef, <4 x i32> <i32 0, i32 1, i32 0, i32 3>
+ ret <4 x i32> %2
+}
+
+
+; Test that we correctly combine shuffles according to rule
+; shuffle(shuffle(x, y), undef) -> shuffle(y, undef)
+
+define <4 x i32> @combine_nested_undef_test22(<4 x i32> %A, <4 x i32> %B) {
+; SSE-LABEL: combine_nested_undef_test22:
+; SSE: # BB#0:
+; SSE-NEXT: pshufd {{.*#+}} xmm0 = xmm1[1,1,1,3]
+; SSE-NEXT: retq
+;
+; AVX-LABEL: combine_nested_undef_test22:
+; AVX: # BB#0:
+; AVX-NEXT: vpshufd {{.*#+}} xmm0 = xmm1[1,1,1,3]
+; AVX-NEXT: retq
+ %1 = shufflevector <4 x i32> %A, <4 x i32> %B, <4 x i32> <i32 4, i32 5, i32 2, i32 7>
+ %2 = shufflevector <4 x i32> %1, <4 x i32> undef, <4 x i32> <i32 1, i32 1, i32 1, i32 3>
+ ret <4 x i32> %2
+}
+
+define <4 x i32> @combine_nested_undef_test23(<4 x i32> %A, <4 x i32> %B) {
+; SSE-LABEL: combine_nested_undef_test23:
+; SSE: # BB#0:
+; SSE-NEXT: pshufd {{.*#+}} xmm0 = xmm1[0,1,0,3]
+; SSE-NEXT: retq
+;
+; AVX-LABEL: combine_nested_undef_test23:
+; AVX: # BB#0:
+; AVX-NEXT: vpshufd {{.*#+}} xmm0 = xmm1[0,1,0,3]
+; AVX-NEXT: retq
+ %1 = shufflevector <4 x i32> %A, <4 x i32> %B, <4 x i32> <i32 4, i32 5, i32 2, i32 7>
+ %2 = shufflevector <4 x i32> %1, <4 x i32> undef, <4 x i32> <i32 0, i32 1, i32 0, i32 3>
+ ret <4 x i32> %2
+}
+
+define <4 x i32> @combine_nested_undef_test24(<4 x i32> %A, <4 x i32> %B) {
+; SSE-LABEL: combine_nested_undef_test24:
+; SSE: # BB#0:
+; SSE-NEXT: pshufd {{.*#+}} xmm0 = xmm1[0,3,2,3]
+; SSE-NEXT: retq
+;
+; AVX-LABEL: combine_nested_undef_test24:
+; AVX: # BB#0:
+; AVX-NEXT: vpshufd {{.*#+}} xmm0 = xmm1[0,3,2,3]
+; AVX-NEXT: retq
+ %1 = shufflevector <4 x i32> %A, <4 x i32> %B, <4 x i32> <i32 4, i32 1, i32 6, i32 7>
+ %2 = shufflevector <4 x i32> %1, <4 x i32> undef, <4 x i32> <i32 0, i32 3, i32 2, i32 4>
+ ret <4 x i32> %2
+}
+
+define <4 x i32> @combine_nested_undef_test25(<4 x i32> %A, <4 x i32> %B) {
+; SSE-LABEL: combine_nested_undef_test25:
+; SSE: # BB#0:
+; SSE-NEXT: pshufd {{.*#+}} xmm0 = xmm0[0,1,0,1]
+; SSE-NEXT: retq
+;
+; AVX1-LABEL: combine_nested_undef_test25:
+; AVX1: # BB#0:
+; AVX1-NEXT: vpshufd {{.*#+}} xmm0 = xmm0[0,1,0,1]
+; AVX1-NEXT: retq
+;
+; AVX2-LABEL: combine_nested_undef_test25:
+; AVX2: # BB#0:
+; AVX2-NEXT: vpbroadcastq %xmm0, %xmm0
+; AVX2-NEXT: retq
+ %1 = shufflevector <4 x i32> %B, <4 x i32> %A, <4 x i32> <i32 1, i32 5, i32 2, i32 4>
+ %2 = shufflevector <4 x i32> %1, <4 x i32> undef, <4 x i32> <i32 3, i32 1, i32 3, i32 1>
+ ret <4 x i32> %2
+}
+
+define <4 x i32> @combine_nested_undef_test26(<4 x i32> %A, <4 x i32> %B) {
+; SSE-LABEL: combine_nested_undef_test26:
+; SSE: # BB#0:
+; SSE-NEXT: pshufd {{.*#+}} xmm0 = xmm0[2,3,2,3]
+; SSE-NEXT: retq
+;
+; AVX-LABEL: combine_nested_undef_test26:
+; AVX: # BB#0:
+; AVX-NEXT: vpshufd {{.*#+}} xmm0 = xmm0[2,3,2,3]
+; AVX-NEXT: retq
+ %1 = shufflevector <4 x i32> %B, <4 x i32> %A, <4 x i32> <i32 1, i32 2, i32 6, i32 7>
+ %2 = shufflevector <4 x i32> %1, <4 x i32> undef, <4 x i32> <i32 2, i32 3, i32 2, i32 3>
+ ret <4 x i32> %2
+}
+
+define <4 x i32> @combine_nested_undef_test27(<4 x i32> %A, <4 x i32> %B) {
+; SSE-LABEL: combine_nested_undef_test27:
+; SSE: # BB#0:
+; SSE-NEXT: pshufd {{.*#+}} xmm0 = xmm0[0,1,0,1]
+; SSE-NEXT: retq
+;
+; AVX1-LABEL: combine_nested_undef_test27:
+; AVX1: # BB#0:
+; AVX1-NEXT: vpshufd {{.*#+}} xmm0 = xmm0[0,1,0,1]
+; AVX1-NEXT: retq
+;
+; AVX2-LABEL: combine_nested_undef_test27:
+; AVX2: # BB#0:
+; AVX2-NEXT: vpbroadcastq %xmm0, %xmm0
+; AVX2-NEXT: retq
+ %1 = shufflevector <4 x i32> %B, <4 x i32> %A, <4 x i32> <i32 2, i32 1, i32 5, i32 4>
+ %2 = shufflevector <4 x i32> %1, <4 x i32> undef, <4 x i32> <i32 3, i32 2, i32 3, i32 2>
+ ret <4 x i32> %2
+}
+
+define <4 x i32> @combine_nested_undef_test28(<4 x i32> %A, <4 x i32> %B) {
+; SSE-LABEL: combine_nested_undef_test28:
+; SSE: # BB#0:
+; SSE-NEXT: pshufd {{.*#+}} xmm0 = xmm0[0,1,1,0]
+; SSE-NEXT: retq
+;
+; AVX-LABEL: combine_nested_undef_test28:
+; AVX: # BB#0:
+; AVX-NEXT: vpshufd {{.*#+}} xmm0 = xmm0[0,1,1,0]
+; AVX-NEXT: retq
+ %1 = shufflevector <4 x i32> %B, <4 x i32> %A, <4 x i32> <i32 1, i32 2, i32 4, i32 5>
+ %2 = shufflevector <4 x i32> %1, <4 x i32> undef, <4 x i32> <i32 2, i32 3, i32 3, i32 2>
+ ret <4 x i32> %2
+}
+
+define <4 x float> @combine_test1(<4 x float> %a, <4 x float> %b) {
+; SSE-LABEL: combine_test1:
+; SSE: # BB#0:
+; SSE-NEXT: movaps %xmm1, %xmm0
+; SSE-NEXT: retq
+;
+; AVX-LABEL: combine_test1:
+; AVX: # BB#0:
+; AVX-NEXT: vmovaps %xmm1, %xmm0
+; AVX-NEXT: retq
+ %1 = shufflevector <4 x float> %a, <4 x float> %b, <4 x i32> <i32 4, i32 1, i32 6, i32 3>
+ %2 = shufflevector <4 x float> %1, <4 x float> %b, <4 x i32> <i32 0, i32 5, i32 2, i32 7>
+ ret <4 x float> %2
+}
+
+define <4 x float> @combine_test2(<4 x float> %a, <4 x float> %b) {
+; SSE2-LABEL: combine_test2:
+; SSE2: # BB#0:
+; SSE2-NEXT: movss {{.*#+}} xmm1 = xmm0[0],xmm1[1,2,3]
+; SSE2-NEXT: movaps %xmm1, %xmm0
+; SSE2-NEXT: retq
+;
+; SSSE3-LABEL: combine_test2:
+; SSSE3: # BB#0:
+; SSSE3-NEXT: movss {{.*#+}} xmm1 = xmm0[0],xmm1[1,2,3]
+; SSSE3-NEXT: movaps %xmm1, %xmm0
+; SSSE3-NEXT: retq
+;
+; SSE41-LABEL: combine_test2:
+; SSE41: # BB#0:
+; SSE41-NEXT: blendps {{.*#+}} xmm0 = xmm0[0],xmm1[1,2,3]
+; SSE41-NEXT: retq
+;
+; AVX-LABEL: combine_test2:
+; AVX: # BB#0:
+; AVX-NEXT: vblendps {{.*#+}} xmm0 = xmm0[0],xmm1[1,2,3]
+; AVX-NEXT: retq
+ %1 = shufflevector <4 x float> %a, <4 x float> %b, <4 x i32> <i32 0, i32 5, i32 2, i32 7>
+ %2 = shufflevector <4 x float> %1, <4 x float> %b, <4 x i32> <i32 0, i32 1, i32 6, i32 3>
+ ret <4 x float> %2
+}
+
+define <4 x float> @combine_test3(<4 x float> %a, <4 x float> %b) {
+; SSE-LABEL: combine_test3:
+; SSE: # BB#0:
+; SSE-NEXT: unpcklpd {{.*#+}} xmm0 = xmm0[0],xmm1[0]
+; SSE-NEXT: retq
+;
+; AVX-LABEL: combine_test3:
+; AVX: # BB#0:
+; AVX-NEXT: vunpcklpd {{.*#+}} xmm0 = xmm0[0],xmm1[0]
+; AVX-NEXT: retq
+ %1 = shufflevector <4 x float> %a, <4 x float> %b, <4 x i32> <i32 0, i32 5, i32 1, i32 7>
+ %2 = shufflevector <4 x float> %1, <4 x float> %b, <4 x i32> <i32 0, i32 2, i32 4, i32 1>
+ ret <4 x float> %2
+}
+
+define <4 x float> @combine_test4(<4 x float> %a, <4 x float> %b) {
+; SSE-LABEL: combine_test4:
+; SSE: # BB#0:
+; SSE-NEXT: unpckhpd {{.*#+}} xmm1 = xmm1[1],xmm0[1]
+; SSE-NEXT: movapd %xmm1, %xmm0
+; SSE-NEXT: retq
+;
+; AVX-LABEL: combine_test4:
+; AVX: # BB#0:
+; AVX-NEXT: vunpckhpd {{.*#+}} xmm0 = xmm1[1],xmm0[1]
+; AVX-NEXT: retq
+ %1 = shufflevector <4 x float> %a, <4 x float> %b, <4 x i32> <i32 2, i32 3, i32 5, i32 5>
+ %2 = shufflevector <4 x float> %1, <4 x float> %b, <4 x i32> <i32 6, i32 7, i32 0, i32 1>
+ ret <4 x float> %2
+}
+
+define <4 x float> @combine_test5(<4 x float> %a, <4 x float> %b) {
+; SSE2-LABEL: combine_test5:
+; SSE2: # BB#0:
+; SSE2-NEXT: shufps {{.*#+}} xmm0 = xmm0[1,0],xmm1[0,0]
+; SSE2-NEXT: shufps {{.*#+}} xmm0 = xmm0[2,0],xmm1[2,3]
+; SSE2-NEXT: retq
+;
+; SSSE3-LABEL: combine_test5:
+; SSSE3: # BB#0:
+; SSSE3-NEXT: shufps {{.*#+}} xmm0 = xmm0[1,0],xmm1[0,0]
+; SSSE3-NEXT: shufps {{.*#+}} xmm0 = xmm0[2,0],xmm1[2,3]
+; SSSE3-NEXT: retq
+;
+; SSE41-LABEL: combine_test5:
+; SSE41: # BB#0:
+; SSE41-NEXT: blendps {{.*#+}} xmm0 = xmm1[0],xmm0[1],xmm1[2,3]
+; SSE41-NEXT: retq
+;
+; AVX-LABEL: combine_test5:
+; AVX: # BB#0:
+; AVX-NEXT: vblendps {{.*#+}} xmm0 = xmm1[0],xmm0[1],xmm1[2,3]
+; AVX-NEXT: retq
+ %1 = shufflevector <4 x float> %a, <4 x float> %b, <4 x i32> <i32 4, i32 1, i32 6, i32 3>
+ %2 = shufflevector <4 x float> %1, <4 x float> %b, <4 x i32> <i32 0, i32 1, i32 2, i32 7>
+ ret <4 x float> %2
+}
+
+define <4 x i32> @combine_test6(<4 x i32> %a, <4 x i32> %b) {
+; SSE-LABEL: combine_test6:
+; SSE: # BB#0:
+; SSE-NEXT: movaps %xmm1, %xmm0
+; SSE-NEXT: retq
+;
+; AVX-LABEL: combine_test6:
+; AVX: # BB#0:
+; AVX-NEXT: vmovaps %xmm1, %xmm0
+; AVX-NEXT: retq
+ %1 = shufflevector <4 x i32> %a, <4 x i32> %b, <4 x i32> <i32 4, i32 1, i32 6, i32 3>
+ %2 = shufflevector <4 x i32> %1, <4 x i32> %b, <4 x i32> <i32 0, i32 5, i32 2, i32 7>
+ ret <4 x i32> %2
+}
+
+define <4 x i32> @combine_test7(<4 x i32> %a, <4 x i32> %b) {
+; SSE2-LABEL: combine_test7:
+; SSE2: # BB#0:
+; SSE2-NEXT: movss {{.*#+}} xmm1 = xmm0[0],xmm1[1,2,3]
+; SSE2-NEXT: movaps %xmm1, %xmm0
+; SSE2-NEXT: retq
+;
+; SSSE3-LABEL: combine_test7:
+; SSSE3: # BB#0:
+; SSSE3-NEXT: movss {{.*#+}} xmm1 = xmm0[0],xmm1[1,2,3]
+; SSSE3-NEXT: movaps %xmm1, %xmm0
+; SSSE3-NEXT: retq
+;
+; SSE41-LABEL: combine_test7:
+; SSE41: # BB#0:
+; SSE41-NEXT: pblendw {{.*#+}} xmm0 = xmm0[0,1],xmm1[2,3,4,5,6,7]
+; SSE41-NEXT: retq
+;
+; AVX1-LABEL: combine_test7:
+; AVX1: # BB#0:
+; AVX1-NEXT: vpblendw {{.*#+}} xmm0 = xmm0[0,1],xmm1[2,3,4,5,6,7]
+; AVX1-NEXT: retq
+;
+; AVX2-LABEL: combine_test7:
+; AVX2: # BB#0:
+; AVX2-NEXT: vpblendd {{.*#+}} xmm0 = xmm0[0],xmm1[1,2,3]
+; AVX2-NEXT: retq
+ %1 = shufflevector <4 x i32> %a, <4 x i32> %b, <4 x i32> <i32 0, i32 5, i32 2, i32 7>
+ %2 = shufflevector <4 x i32> %1, <4 x i32> %b, <4 x i32> <i32 0, i32 1, i32 6, i32 3>
+ ret <4 x i32> %2
+}
+
+define <4 x i32> @combine_test8(<4 x i32> %a, <4 x i32> %b) {
+; SSE-LABEL: combine_test8:
+; SSE: # BB#0:
+; SSE-NEXT: punpcklqdq {{.*#+}} xmm0 = xmm0[0],xmm1[0]
+; SSE-NEXT: retq
+;
+; AVX-LABEL: combine_test8:
+; AVX: # BB#0:
+; AVX-NEXT: vpunpcklqdq {{.*#+}} xmm0 = xmm0[0],xmm1[0]
+; AVX-NEXT: retq
+ %1 = shufflevector <4 x i32> %a, <4 x i32> %b, <4 x i32> <i32 0, i32 5, i32 1, i32 7>
+ %2 = shufflevector <4 x i32> %1, <4 x i32> %b, <4 x i32> <i32 0, i32 2, i32 4, i32 1>
+ ret <4 x i32> %2
+}
+
+define <4 x i32> @combine_test9(<4 x i32> %a, <4 x i32> %b) {
+; SSE-LABEL: combine_test9:
+; SSE: # BB#0:
+; SSE-NEXT: punpckhqdq {{.*#+}} xmm1 = xmm1[1],xmm0[1]
+; SSE-NEXT: movdqa %xmm1, %xmm0
+; SSE-NEXT: retq
+;
+; AVX-LABEL: combine_test9:
+; AVX: # BB#0:
+; AVX-NEXT: vpunpckhqdq {{.*#+}} xmm0 = xmm1[1],xmm0[1]
+; AVX-NEXT: retq
+ %1 = shufflevector <4 x i32> %a, <4 x i32> %b, <4 x i32> <i32 2, i32 3, i32 5, i32 5>
+ %2 = shufflevector <4 x i32> %1, <4 x i32> %b, <4 x i32> <i32 6, i32 7, i32 0, i32 1>
+ ret <4 x i32> %2
+}
+
+define <4 x i32> @combine_test10(<4 x i32> %a, <4 x i32> %b) {
+; SSE2-LABEL: combine_test10:
+; SSE2: # BB#0:
+; SSE2-NEXT: shufps {{.*#+}} xmm0 = xmm0[1,0],xmm1[0,0]
+; SSE2-NEXT: shufps {{.*#+}} xmm0 = xmm0[2,0],xmm1[2,3]
+; SSE2-NEXT: retq
+;
+; SSSE3-LABEL: combine_test10:
+; SSSE3: # BB#0:
+; SSSE3-NEXT: shufps {{.*#+}} xmm0 = xmm0[1,0],xmm1[0,0]
+; SSSE3-NEXT: shufps {{.*#+}} xmm0 = xmm0[2,0],xmm1[2,3]
+; SSSE3-NEXT: retq
+;
+; SSE41-LABEL: combine_test10:
+; SSE41: # BB#0:
+; SSE41-NEXT: pblendw {{.*#+}} xmm0 = xmm1[0,1],xmm0[2,3],xmm1[4,5,6,7]
+; SSE41-NEXT: retq
+;
+; AVX1-LABEL: combine_test10:
+; AVX1: # BB#0:
+; AVX1-NEXT: vpblendw {{.*#+}} xmm0 = xmm1[0,1],xmm0[2,3],xmm1[4,5,6,7]
+; AVX1-NEXT: retq
+;
+; AVX2-LABEL: combine_test10:
+; AVX2: # BB#0:
+; AVX2-NEXT: vpblendd {{.*#+}} xmm0 = xmm1[0],xmm0[1],xmm1[2,3]
+; AVX2-NEXT: retq
+ %1 = shufflevector <4 x i32> %a, <4 x i32> %b, <4 x i32> <i32 4, i32 1, i32 6, i32 3>
+ %2 = shufflevector <4 x i32> %1, <4 x i32> %b, <4 x i32> <i32 0, i32 1, i32 2, i32 7>
+ ret <4 x i32> %2
+}
+
+define <4 x float> @combine_test11(<4 x float> %a, <4 x float> %b) {
+; ALL-LABEL: combine_test11:
+; ALL: # BB#0:
+; ALL-NEXT: retq
+ %1 = shufflevector <4 x float> %a, <4 x float> %b, <4 x i32> <i32 4, i32 1, i32 6, i32 3>
+ %2 = shufflevector <4 x float> %1, <4 x float> %a, <4 x i32> <i32 4, i32 1, i32 6, i32 3>
+ ret <4 x float> %2
+}
+
+define <4 x float> @combine_test12(<4 x float> %a, <4 x float> %b) {
+; SSE2-LABEL: combine_test12:
+; SSE2: # BB#0:
+; SSE2-NEXT: movss {{.*#+}} xmm1 = xmm0[0],xmm1[1,2,3]
+; SSE2-NEXT: movaps %xmm1, %xmm0
+; SSE2-NEXT: retq
+;
+; SSSE3-LABEL: combine_test12:
+; SSSE3: # BB#0:
+; SSSE3-NEXT: movss {{.*#+}} xmm1 = xmm0[0],xmm1[1,2,3]
+; SSSE3-NEXT: movaps %xmm1, %xmm0
+; SSSE3-NEXT: retq
+;
+; SSE41-LABEL: combine_test12:
+; SSE41: # BB#0:
+; SSE41-NEXT: blendps {{.*#+}} xmm0 = xmm0[0],xmm1[1,2,3]
+; SSE41-NEXT: retq
+;
+; AVX-LABEL: combine_test12:
+; AVX: # BB#0:
+; AVX-NEXT: vblendps {{.*#+}} xmm0 = xmm0[0],xmm1[1,2,3]
+; AVX-NEXT: retq
+ %1 = shufflevector <4 x float> %a, <4 x float> %b, <4 x i32> <i32 0, i32 5, i32 6, i32 7>
+ %2 = shufflevector <4 x float> %1, <4 x float> %a, <4 x i32> <i32 4, i32 1, i32 2, i32 3>
+ ret <4 x float> %2
+}
+
+define <4 x float> @combine_test13(<4 x float> %a, <4 x float> %b) {
+; SSE-LABEL: combine_test13:
+; SSE: # BB#0:
+; SSE-NEXT: unpcklpd {{.*#+}} xmm0 = xmm0[0],xmm1[0]
+; SSE-NEXT: retq
+;
+; AVX-LABEL: combine_test13:
+; AVX: # BB#0:
+; AVX-NEXT: vunpcklpd {{.*#+}} xmm0 = xmm0[0],xmm1[0]
+; AVX-NEXT: retq
+ %1 = shufflevector <4 x float> %a, <4 x float> %b, <4 x i32> <i32 0, i32 1, i32 4, i32 5>
+ %2 = shufflevector <4 x float> %1, <4 x float> %a, <4 x i32> <i32 4, i32 5, i32 2, i32 3>
+ ret <4 x float> %2
+}
+
+define <4 x float> @combine_test14(<4 x float> %a, <4 x float> %b) {
+; SSE-LABEL: combine_test14:
+; SSE: # BB#0:
+; SSE-NEXT: unpckhpd {{.*#+}} xmm0 = xmm0[1],xmm1[1]
+; SSE-NEXT: retq
+;
+; AVX-LABEL: combine_test14:
+; AVX: # BB#0:
+; AVX-NEXT: vunpckhpd {{.*#+}} xmm0 = xmm0[1],xmm1[1]
+; AVX-NEXT: retq
+ %1 = shufflevector <4 x float> %a, <4 x float> %b, <4 x i32> <i32 6, i32 7, i32 5, i32 5>
+ %2 = shufflevector <4 x float> %1, <4 x float> %a, <4 x i32> <i32 6, i32 7, i32 0, i32 1>
+ ret <4 x float> %2
+}
+
+define <4 x float> @combine_test15(<4 x float> %a, <4 x float> %b) {
+; SSE2-LABEL: combine_test15:
+; SSE2: # BB#0:
+; SSE2-NEXT: shufps {{.*#+}} xmm0 = xmm0[1,0],xmm1[0,0]
+; SSE2-NEXT: shufps {{.*#+}} xmm0 = xmm0[2,0],xmm1[2,3]
+; SSE2-NEXT: retq
+;
+; SSSE3-LABEL: combine_test15:
+; SSSE3: # BB#0:
+; SSSE3-NEXT: shufps {{.*#+}} xmm0 = xmm0[1,0],xmm1[0,0]
+; SSSE3-NEXT: shufps {{.*#+}} xmm0 = xmm0[2,0],xmm1[2,3]
+; SSSE3-NEXT: retq
+;
+; SSE41-LABEL: combine_test15:
+; SSE41: # BB#0:
+; SSE41-NEXT: blendps {{.*#+}} xmm0 = xmm1[0],xmm0[1],xmm1[2,3]
+; SSE41-NEXT: retq
+;
+; AVX-LABEL: combine_test15:
+; AVX: # BB#0:
+; AVX-NEXT: vblendps {{.*#+}} xmm0 = xmm1[0],xmm0[1],xmm1[2,3]
+; AVX-NEXT: retq
+ %1 = shufflevector <4 x float> %a, <4 x float> %b, <4 x i32> <i32 4, i32 1, i32 6, i32 7>
+ %2 = shufflevector <4 x float> %1, <4 x float> %a, <4 x i32> <i32 0, i32 5, i32 2, i32 3>
+ ret <4 x float> %2
+}
+
+define <4 x i32> @combine_test16(<4 x i32> %a, <4 x i32> %b) {
+; ALL-LABEL: combine_test16:
+; ALL: # BB#0:
+; ALL-NEXT: retq
+ %1 = shufflevector <4 x i32> %a, <4 x i32> %b, <4 x i32> <i32 4, i32 1, i32 6, i32 3>
+ %2 = shufflevector <4 x i32> %1, <4 x i32> %a, <4 x i32> <i32 4, i32 1, i32 6, i32 3>
+ ret <4 x i32> %2
+}
+
+define <4 x i32> @combine_test17(<4 x i32> %a, <4 x i32> %b) {
+; SSE2-LABEL: combine_test17:
+; SSE2: # BB#0:
+; SSE2-NEXT: movss {{.*#+}} xmm1 = xmm0[0],xmm1[1,2,3]
+; SSE2-NEXT: movaps %xmm1, %xmm0
+; SSE2-NEXT: retq
+;
+; SSSE3-LABEL: combine_test17:
+; SSSE3: # BB#0:
+; SSSE3-NEXT: movss {{.*#+}} xmm1 = xmm0[0],xmm1[1,2,3]
+; SSSE3-NEXT: movaps %xmm1, %xmm0
+; SSSE3-NEXT: retq
+;
+; SSE41-LABEL: combine_test17:
+; SSE41: # BB#0:
+; SSE41-NEXT: pblendw {{.*#+}} xmm0 = xmm0[0,1],xmm1[2,3,4,5,6,7]
+; SSE41-NEXT: retq
+;
+; AVX1-LABEL: combine_test17:
+; AVX1: # BB#0:
+; AVX1-NEXT: vpblendw {{.*#+}} xmm0 = xmm0[0,1],xmm1[2,3,4,5,6,7]
+; AVX1-NEXT: retq
+;
+; AVX2-LABEL: combine_test17:
+; AVX2: # BB#0:
+; AVX2-NEXT: vpblendd {{.*#+}} xmm0 = xmm0[0],xmm1[1,2,3]
+; AVX2-NEXT: retq
+ %1 = shufflevector <4 x i32> %a, <4 x i32> %b, <4 x i32> <i32 0, i32 5, i32 6, i32 7>
+ %2 = shufflevector <4 x i32> %1, <4 x i32> %a, <4 x i32> <i32 4, i32 1, i32 2, i32 3>
+ ret <4 x i32> %2
+}
+
+define <4 x i32> @combine_test18(<4 x i32> %a, <4 x i32> %b) {
+; SSE-LABEL: combine_test18:
+; SSE: # BB#0:
+; SSE-NEXT: punpcklqdq {{.*#+}} xmm0 = xmm0[0],xmm1[0]
+; SSE-NEXT: retq
+;
+; AVX-LABEL: combine_test18:
+; AVX: # BB#0:
+; AVX-NEXT: vpunpcklqdq {{.*#+}} xmm0 = xmm0[0],xmm1[0]
+; AVX-NEXT: retq
+ %1 = shufflevector <4 x i32> %a, <4 x i32> %b, <4 x i32> <i32 0, i32 1, i32 4, i32 5>
+ %2 = shufflevector <4 x i32> %1, <4 x i32> %a, <4 x i32> <i32 4, i32 5, i32 2, i32 3>
+ ret <4 x i32> %2
+}
+
+define <4 x i32> @combine_test19(<4 x i32> %a, <4 x i32> %b) {
+; SSE-LABEL: combine_test19:
+; SSE: # BB#0:
+; SSE-NEXT: punpckhqdq {{.*#+}} xmm0 = xmm0[1],xmm1[1]
+; SSE-NEXT: retq
+;
+; AVX-LABEL: combine_test19:
+; AVX: # BB#0:
+; AVX-NEXT: vpunpckhqdq {{.*#+}} xmm0 = xmm0[1],xmm1[1]
+; AVX-NEXT: retq
+ %1 = shufflevector <4 x i32> %a, <4 x i32> %b, <4 x i32> <i32 6, i32 7, i32 5, i32 5>
+ %2 = shufflevector <4 x i32> %1, <4 x i32> %a, <4 x i32> <i32 6, i32 7, i32 0, i32 1>
+ ret <4 x i32> %2
+}
+
+define <4 x i32> @combine_test20(<4 x i32> %a, <4 x i32> %b) {
+; SSE2-LABEL: combine_test20:
+; SSE2: # BB#0:
+; SSE2-NEXT: shufps {{.*#+}} xmm0 = xmm0[1,0],xmm1[0,0]
+; SSE2-NEXT: shufps {{.*#+}} xmm0 = xmm0[2,0],xmm1[2,3]
+; SSE2-NEXT: retq
+;
+; SSSE3-LABEL: combine_test20:
+; SSSE3: # BB#0:
+; SSSE3-NEXT: shufps {{.*#+}} xmm0 = xmm0[1,0],xmm1[0,0]
+; SSSE3-NEXT: shufps {{.*#+}} xmm0 = xmm0[2,0],xmm1[2,3]
+; SSSE3-NEXT: retq
+;
+; SSE41-LABEL: combine_test20:
+; SSE41: # BB#0:
+; SSE41-NEXT: pblendw {{.*#+}} xmm0 = xmm1[0,1],xmm0[2,3],xmm1[4,5,6,7]
+; SSE41-NEXT: retq
+;
+; AVX1-LABEL: combine_test20:
+; AVX1: # BB#0:
+; AVX1-NEXT: vpblendw {{.*#+}} xmm0 = xmm1[0,1],xmm0[2,3],xmm1[4,5,6,7]
+; AVX1-NEXT: retq
+;
+; AVX2-LABEL: combine_test20:
+; AVX2: # BB#0:
+; AVX2-NEXT: vpblendd {{.*#+}} xmm0 = xmm1[0],xmm0[1],xmm1[2,3]
+; AVX2-NEXT: retq
+ %1 = shufflevector <4 x i32> %a, <4 x i32> %b, <4 x i32> <i32 4, i32 1, i32 6, i32 7>
+ %2 = shufflevector <4 x i32> %1, <4 x i32> %a, <4 x i32> <i32 0, i32 5, i32 2, i32 3>
+ ret <4 x i32> %2
+}
+
+define <4 x i32> @combine_test21(<8 x i32> %a, <4 x i32>* %ptr) {
+; SSE-LABEL: combine_test21:
+; SSE: # BB#0:
+; SSE-NEXT: movdqa %xmm0, %xmm2
+; SSE-NEXT: punpcklqdq {{.*#+}} xmm2 = xmm2[0],xmm1[0]
+; SSE-NEXT: punpckhqdq {{.*#+}} xmm0 = xmm0[1],xmm1[1]
+; SSE-NEXT: movdqa %xmm2, (%rdi)
+; SSE-NEXT: retq
+;
+; AVX1-LABEL: combine_test21:
+; AVX1: # BB#0:
+; AVX1-NEXT: vextractf128 $1, %ymm0, %xmm1
+; AVX1-NEXT: vpunpcklqdq {{.*#+}} xmm2 = xmm0[0],xmm1[0]
+; AVX1-NEXT: vpunpckhqdq {{.*#+}} xmm0 = xmm0[1],xmm1[1]
+; AVX1-NEXT: vmovdqa %xmm2, (%rdi)
+; AVX1-NEXT: vzeroupper
+; AVX1-NEXT: retq
+;
+; AVX2-LABEL: combine_test21:
+; AVX2: # BB#0:
+; AVX2-NEXT: vextracti128 $1, %ymm0, %xmm1
+; AVX2-NEXT: vpunpcklqdq {{.*#+}} xmm2 = xmm0[0],xmm1[0]
+; AVX2-NEXT: vpunpckhqdq {{.*#+}} xmm0 = xmm0[1],xmm1[1]
+; AVX2-NEXT: vmovdqa %xmm2, (%rdi)
+; AVX2-NEXT: vzeroupper
+; AVX2-NEXT: retq
+ %1 = shufflevector <8 x i32> %a, <8 x i32> %a, <4 x i32> <i32 0, i32 1, i32 4, i32 5>
+ %2 = shufflevector <8 x i32> %a, <8 x i32> %a, <4 x i32> <i32 2, i32 3, i32 6, i32 7>
+ store <4 x i32> %1, <4 x i32>* %ptr, align 16
+ ret <4 x i32> %2
+}
+
+define <8 x float> @combine_test22(<2 x float>* %a, <2 x float>* %b) {
+; SSE-LABEL: combine_test22:
+; SSE: # BB#0:
+; SSE-NEXT: movq {{.*#+}} xmm0 = mem[0],zero
+; SSE-NEXT: movhpd (%rsi), %xmm0
+; SSE-NEXT: retq
+;
+; AVX-LABEL: combine_test22:
+; AVX: # BB#0:
+; AVX-NEXT: vmovq {{.*#+}} xmm0 = mem[0],zero
+; AVX-NEXT: vmovhpd (%rsi), %xmm0, %xmm0
+; AVX-NEXT: retq
+; Current AVX2 lowering of this is still awful, not adding a test case.
+ %1 = load <2 x float>* %a, align 8
+ %2 = load <2 x float>* %b, align 8
+ %3 = shufflevector <2 x float> %1, <2 x float> %2, <8 x i32> <i32 0, i32 1, i32 2, i32 3, i32 undef, i32 undef, i32 undef, i32 undef>
+ ret <8 x float> %3
+}
+
+; Check some negative cases.
+; FIXME: Do any of these really make sense? Are they redundant with the above tests?
+
+define <4 x float> @combine_test1b(<4 x float> %a, <4 x float> %b) {
+; SSE-LABEL: combine_test1b:
+; SSE: # BB#0:
+; SSE-NEXT: shufps {{.*#+}} xmm1 = xmm1[0,1,2,0]
+; SSE-NEXT: movaps %xmm1, %xmm0
+; SSE-NEXT: retq
+;
+; AVX-LABEL: combine_test1b:
+; AVX: # BB#0:
+; AVX-NEXT: vpermilps {{.*#+}} xmm0 = xmm1[0,1,2,0]
+; AVX-NEXT: retq
+ %1 = shufflevector <4 x float> %a, <4 x float> %b, <4 x i32> <i32 4, i32 1, i32 6, i32 3>
+ %2 = shufflevector <4 x float> %1, <4 x float> %b, <4 x i32> <i32 0, i32 5, i32 2, i32 0>
+ ret <4 x float> %2
+}
+
+define <4 x float> @combine_test2b(<4 x float> %a, <4 x float> %b) {
+; SSE2-LABEL: combine_test2b:
+; SSE2: # BB#0:
+; SSE2-NEXT: movlhps {{.*#+}} xmm1 = xmm1[0,0]
+; SSE2-NEXT: movaps %xmm1, %xmm0
+; SSE2-NEXT: retq
+;
+; SSSE3-LABEL: combine_test2b:
+; SSSE3: # BB#0:
+; SSSE3-NEXT: movddup {{.*#+}} xmm0 = xmm1[0,0]
+; SSSE3-NEXT: retq
+;
+; SSE41-LABEL: combine_test2b:
+; SSE41: # BB#0:
+; SSE41-NEXT: movddup {{.*#+}} xmm0 = xmm1[0,0]
+; SSE41-NEXT: retq
+;
+; AVX-LABEL: combine_test2b:
+; AVX: # BB#0:
+; AVX-NEXT: vmovddup {{.*#+}} xmm0 = xmm1[0,0]
+; AVX-NEXT: retq
+ %1 = shufflevector <4 x float> %a, <4 x float> %b, <4 x i32> <i32 4, i32 1, i32 6, i32 3>
+ %2 = shufflevector <4 x float> %1, <4 x float> %b, <4 x i32> <i32 0, i32 5, i32 0, i32 5>
+ ret <4 x float> %2
+}
+
+define <4 x float> @combine_test3b(<4 x float> %a, <4 x float> %b) {
+; SSE2-LABEL: combine_test3b:
+; SSE2: # BB#0:
+; SSE2-NEXT: shufps {{.*#+}} xmm0 = xmm0[0,0],xmm1[3,0]
+; SSE2-NEXT: shufps {{.*#+}} xmm0 = xmm0[0,2],xmm1[2,3]
+; SSE2-NEXT: retq
+;
+; SSSE3-LABEL: combine_test3b:
+; SSSE3: # BB#0:
+; SSSE3-NEXT: shufps {{.*#+}} xmm0 = xmm0[0,0],xmm1[3,0]
+; SSSE3-NEXT: shufps {{.*#+}} xmm0 = xmm0[0,2],xmm1[2,3]
+; SSSE3-NEXT: retq
+;
+; SSE41-LABEL: combine_test3b:
+; SSE41: # BB#0:
+; SSE41-NEXT: blendpd {{.*#+}} xmm0 = xmm0[0],xmm1[1]
+; SSE41-NEXT: shufps {{.*#+}} xmm0 = xmm0[0,3,2,3]
+; SSE41-NEXT: retq
+;
+; AVX-LABEL: combine_test3b:
+; AVX: # BB#0:
+; AVX-NEXT: vblendpd {{.*#+}} xmm0 = xmm0[0],xmm1[1]
+; AVX-NEXT: vpermilps {{.*#+}} xmm0 = xmm0[0,3,2,3]
+; AVX-NEXT: retq
+ %1 = shufflevector <4 x float> %a, <4 x float> %b, <4 x i32> <i32 0, i32 0, i32 6, i32 3>
+ %2 = shufflevector <4 x float> %1, <4 x float> %b, <4 x i32> <i32 0, i32 7, i32 2, i32 7>
+ ret <4 x float> %2
+}
+
+define <4 x float> @combine_test4b(<4 x float> %a, <4 x float> %b) {
+; SSE-LABEL: combine_test4b:
+; SSE: # BB#0:
+; SSE-NEXT: shufps {{.*#+}} xmm1 = xmm1[1,1,2,3]
+; SSE-NEXT: movaps %xmm1, %xmm0
+; SSE-NEXT: retq
+;
+; AVX-LABEL: combine_test4b:
+; AVX: # BB#0:
+; AVX-NEXT: vpermilps {{.*#+}} xmm0 = xmm1[1,1,2,3]
+; AVX-NEXT: retq
+ %1 = shufflevector <4 x float> %a, <4 x float> %b, <4 x i32> <i32 4, i32 1, i32 6, i32 3>
+ %2 = shufflevector <4 x float> %1, <4 x float> %b, <4 x i32> <i32 5, i32 5, i32 2, i32 7>
+ ret <4 x float> %2
+}
+
+
+; Verify that we correctly fold shuffles even when we use illegal vector types.
+
+define <4 x i8> @combine_test1c(<4 x i8>* %a, <4 x i8>* %b) {
+; SSE2-LABEL: combine_test1c:
+; SSE2: # BB#0:
+; SSE2-NEXT: movd {{.*#+}} xmm1 = mem[0],zero,zero,zero
+; SSE2-NEXT: punpcklbw {{.*#+}} xmm1 = xmm1[0],xmm0[0],xmm1[1],xmm0[1],xmm1[2],xmm0[2],xmm1[3],xmm0[3],xmm1[4],xmm0[4],xmm1[5],xmm0[5],xmm1[6],xmm0[6],xmm1[7],xmm0[7]
+; SSE2-NEXT: punpcklwd {{.*#+}} xmm1 = xmm1[0],xmm0[0],xmm1[1],xmm0[1],xmm1[2],xmm0[2],xmm1[3],xmm0[3]
+; SSE2-NEXT: movd {{.*#+}} xmm0 = mem[0],zero,zero,zero
+; SSE2-NEXT: punpcklbw {{.*#+}} xmm0 = xmm0[0,0,1,1,2,2,3,3,4,4,5,5,6,6,7,7]
+; SSE2-NEXT: punpcklwd {{.*#+}} xmm0 = xmm0[0,0,1,1,2,2,3,3]
+; SSE2-NEXT: movss {{.*#+}} xmm0 = xmm1[0],xmm0[1,2,3]
+; SSE2-NEXT: retq
+;
+; SSSE3-LABEL: combine_test1c:
+; SSSE3: # BB#0:
+; SSSE3-NEXT: movd {{.*#+}} xmm1 = mem[0],zero,zero,zero
+; SSSE3-NEXT: punpcklbw {{.*#+}} xmm1 = xmm1[0],xmm0[0],xmm1[1],xmm0[1],xmm1[2],xmm0[2],xmm1[3],xmm0[3],xmm1[4],xmm0[4],xmm1[5],xmm0[5],xmm1[6],xmm0[6],xmm1[7],xmm0[7]
+; SSSE3-NEXT: punpcklwd {{.*#+}} xmm1 = xmm1[0],xmm0[0],xmm1[1],xmm0[1],xmm1[2],xmm0[2],xmm1[3],xmm0[3]
+; SSSE3-NEXT: movd {{.*#+}} xmm0 = mem[0],zero,zero,zero
+; SSSE3-NEXT: punpcklbw {{.*#+}} xmm0 = xmm0[0,0,1,1,2,2,3,3,4,4,5,5,6,6,7,7]
+; SSSE3-NEXT: punpcklwd {{.*#+}} xmm0 = xmm0[0,0,1,1,2,2,3,3]
+; SSSE3-NEXT: movss {{.*#+}} xmm0 = xmm1[0],xmm0[1,2,3]
+; SSSE3-NEXT: retq
+;
+; SSE41-LABEL: combine_test1c:
+; SSE41: # BB#0:
+; SSE41-NEXT: pmovzxbd {{.*#+}} xmm1 = mem[0],zero,zero,zero,mem[1],zero,zero,zero,mem[2],zero,zero,zero,mem[3],zero,zero,zero
+; SSE41-NEXT: pmovzxbd {{.*#+}} xmm0 = mem[0],zero,zero,zero,mem[1],zero,zero,zero,mem[2],zero,zero,zero,mem[3],zero,zero,zero
+; SSE41-NEXT: pblendw {{.*#+}} xmm0 = xmm1[0,1],xmm0[2,3,4,5,6,7]
+; SSE41-NEXT: retq
+;
+; AVX1-LABEL: combine_test1c:
+; AVX1: # BB#0:
+; AVX1-NEXT: vpmovzxbd {{.*#+}} xmm0 = mem[0],zero,zero,zero,mem[1],zero,zero,zero,mem[2],zero,zero,zero,mem[3],zero,zero,zero
+; AVX1-NEXT: vpmovzxbd {{.*#+}} xmm1 = mem[0],zero,zero,zero,mem[1],zero,zero,zero,mem[2],zero,zero,zero,mem[3],zero,zero,zero
+; AVX1-NEXT: vpblendw {{.*#+}} xmm0 = xmm0[0,1],xmm1[2,3,4,5,6,7]
+; AVX1-NEXT: retq
+;
+; AVX2-LABEL: combine_test1c:
+; AVX2: # BB#0:
+; AVX2-NEXT: vpmovzxbd {{.*#+}} xmm0 = mem[0],zero,zero,zero,mem[1],zero,zero,zero,mem[2],zero,zero,zero,mem[3],zero,zero,zero
+; AVX2-NEXT: vpmovzxbd {{.*#+}} xmm1 = mem[0],zero,zero,zero,mem[1],zero,zero,zero,mem[2],zero,zero,zero,mem[3],zero,zero,zero
+; AVX2-NEXT: vpblendd {{.*#+}} xmm0 = xmm0[0],xmm1[1,2,3]
+; AVX2-NEXT: retq
+ %A = load <4 x i8>* %a
+ %B = load <4 x i8>* %b
+ %1 = shufflevector <4 x i8> %A, <4 x i8> %B, <4 x i32> <i32 0, i32 5, i32 2, i32 7>
+ %2 = shufflevector <4 x i8> %1, <4 x i8> %B, <4 x i32> <i32 0, i32 1, i32 6, i32 3>
+ ret <4 x i8> %2
+}
+
+define <4 x i8> @combine_test2c(<4 x i8>* %a, <4 x i8>* %b) {
+; SSE2-LABEL: combine_test2c:
+; SSE2: # BB#0:
+; SSE2-NEXT: movd {{.*#+}} xmm0 = mem[0],zero,zero,zero
+; SSE2-NEXT: punpcklbw {{.*#+}} xmm0 = xmm0[0,0,1,1,2,2,3,3,4,4,5,5,6,6,7,7]
+; SSE2-NEXT: punpcklwd {{.*#+}} xmm0 = xmm0[0,0,1,1,2,2,3,3]
+; SSE2-NEXT: movd {{.*#+}} xmm1 = mem[0],zero,zero,zero
+; SSE2-NEXT: punpcklbw {{.*#+}} xmm1 = xmm1[0],xmm0[0],xmm1[1],xmm0[1],xmm1[2],xmm0[2],xmm1[3],xmm0[3],xmm1[4],xmm0[4],xmm1[5],xmm0[5],xmm1[6],xmm0[6],xmm1[7],xmm0[7]
+; SSE2-NEXT: punpcklwd {{.*#+}} xmm1 = xmm1[0],xmm0[0],xmm1[1],xmm0[1],xmm1[2],xmm0[2],xmm1[3],xmm0[3]
+; SSE2-NEXT: punpcklqdq {{.*#+}} xmm0 = xmm0[0],xmm1[0]
+; SSE2-NEXT: retq
+;
+; SSSE3-LABEL: combine_test2c:
+; SSSE3: # BB#0:
+; SSSE3-NEXT: movd {{.*#+}} xmm0 = mem[0],zero,zero,zero
+; SSSE3-NEXT: punpcklbw {{.*#+}} xmm0 = xmm0[0,0,1,1,2,2,3,3,4,4,5,5,6,6,7,7]
+; SSSE3-NEXT: punpcklwd {{.*#+}} xmm0 = xmm0[0,0,1,1,2,2,3,3]
+; SSSE3-NEXT: movd {{.*#+}} xmm1 = mem[0],zero,zero,zero
+; SSSE3-NEXT: punpcklbw {{.*#+}} xmm1 = xmm1[0],xmm0[0],xmm1[1],xmm0[1],xmm1[2],xmm0[2],xmm1[3],xmm0[3],xmm1[4],xmm0[4],xmm1[5],xmm0[5],xmm1[6],xmm0[6],xmm1[7],xmm0[7]
+; SSSE3-NEXT: punpcklwd {{.*#+}} xmm1 = xmm1[0],xmm0[0],xmm1[1],xmm0[1],xmm1[2],xmm0[2],xmm1[3],xmm0[3]
+; SSSE3-NEXT: punpcklqdq {{.*#+}} xmm0 = xmm0[0],xmm1[0]
+; SSSE3-NEXT: retq
+;
+; SSE41-LABEL: combine_test2c:
+; SSE41: # BB#0:
+; SSE41-NEXT: pmovzxbd {{.*#+}} xmm0 = mem[0],zero,zero,zero,mem[1],zero,zero,zero,mem[2],zero,zero,zero,mem[3],zero,zero,zero
+; SSE41-NEXT: pmovzxbd {{.*#+}} xmm1 = mem[0],zero,zero,zero,mem[1],zero,zero,zero,mem[2],zero,zero,zero,mem[3],zero,zero,zero
+; SSE41-NEXT: punpcklqdq {{.*#+}} xmm0 = xmm0[0],xmm1[0]
+; SSE41-NEXT: retq
+;
+; AVX-LABEL: combine_test2c:
+; AVX: # BB#0:
+; AVX-NEXT: vpmovzxbd {{.*#+}} xmm0 = mem[0],zero,zero,zero,mem[1],zero,zero,zero,mem[2],zero,zero,zero,mem[3],zero,zero,zero
+; AVX-NEXT: vpmovzxbd {{.*#+}} xmm1 = mem[0],zero,zero,zero,mem[1],zero,zero,zero,mem[2],zero,zero,zero,mem[3],zero,zero,zero
+; AVX-NEXT: vpunpcklqdq {{.*#+}} xmm0 = xmm0[0],xmm1[0]
+; AVX-NEXT: retq
+ %A = load <4 x i8>* %a
+ %B = load <4 x i8>* %b
+ %1 = shufflevector <4 x i8> %A, <4 x i8> %B, <4 x i32> <i32 0, i32 5, i32 1, i32 5>
+ %2 = shufflevector <4 x i8> %1, <4 x i8> %B, <4 x i32> <i32 0, i32 2, i32 4, i32 1>
+ ret <4 x i8> %2
+}
+
+define <4 x i8> @combine_test3c(<4 x i8>* %a, <4 x i8>* %b) {
+; SSE2-LABEL: combine_test3c:
+; SSE2: # BB#0:
+; SSE2-NEXT: movd {{.*#+}} xmm1 = mem[0],zero,zero,zero
+; SSE2-NEXT: punpcklbw {{.*#+}} xmm1 = xmm1[0],xmm0[0],xmm1[1],xmm0[1],xmm1[2],xmm0[2],xmm1[3],xmm0[3],xmm1[4],xmm0[4],xmm1[5],xmm0[5],xmm1[6],xmm0[6],xmm1[7],xmm0[7]
+; SSE2-NEXT: punpcklwd {{.*#+}} xmm1 = xmm1[0],xmm0[0],xmm1[1],xmm0[1],xmm1[2],xmm0[2],xmm1[3],xmm0[3]
+; SSE2-NEXT: movd {{.*#+}} xmm0 = mem[0],zero,zero,zero
+; SSE2-NEXT: punpcklbw {{.*#+}} xmm0 = xmm0[0,0,1,1,2,2,3,3,4,4,5,5,6,6,7,7]
+; SSE2-NEXT: punpcklwd {{.*#+}} xmm0 = xmm0[0,0,1,1,2,2,3,3]
+; SSE2-NEXT: punpckhqdq {{.*#+}} xmm0 = xmm0[1],xmm1[1]
+; SSE2-NEXT: retq
+;
+; SSSE3-LABEL: combine_test3c:
+; SSSE3: # BB#0:
+; SSSE3-NEXT: movd {{.*#+}} xmm1 = mem[0],zero,zero,zero
+; SSSE3-NEXT: punpcklbw {{.*#+}} xmm1 = xmm1[0],xmm0[0],xmm1[1],xmm0[1],xmm1[2],xmm0[2],xmm1[3],xmm0[3],xmm1[4],xmm0[4],xmm1[5],xmm0[5],xmm1[6],xmm0[6],xmm1[7],xmm0[7]
+; SSSE3-NEXT: punpcklwd {{.*#+}} xmm1 = xmm1[0],xmm0[0],xmm1[1],xmm0[1],xmm1[2],xmm0[2],xmm1[3],xmm0[3]
+; SSSE3-NEXT: movd {{.*#+}} xmm0 = mem[0],zero,zero,zero
+; SSSE3-NEXT: punpcklbw {{.*#+}} xmm0 = xmm0[0,0,1,1,2,2,3,3,4,4,5,5,6,6,7,7]
+; SSSE3-NEXT: punpcklwd {{.*#+}} xmm0 = xmm0[0,0,1,1,2,2,3,3]
+; SSSE3-NEXT: punpckhqdq {{.*#+}} xmm0 = xmm0[1],xmm1[1]
+; SSSE3-NEXT: retq
+;
+; SSE41-LABEL: combine_test3c:
+; SSE41: # BB#0:
+; SSE41-NEXT: pmovzxbd {{.*#+}} xmm1 = mem[0],zero,zero,zero,mem[1],zero,zero,zero,mem[2],zero,zero,zero,mem[3],zero,zero,zero
+; SSE41-NEXT: pmovzxbd {{.*#+}} xmm0 = mem[0],zero,zero,zero,mem[1],zero,zero,zero,mem[2],zero,zero,zero,mem[3],zero,zero,zero
+; SSE41-NEXT: punpckhqdq {{.*#+}} xmm0 = xmm0[1],xmm1[1]
+; SSE41-NEXT: retq
+;
+; AVX-LABEL: combine_test3c:
+; AVX: # BB#0:
+; AVX-NEXT: vpmovzxbd {{.*#+}} xmm0 = mem[0],zero,zero,zero,mem[1],zero,zero,zero,mem[2],zero,zero,zero,mem[3],zero,zero,zero
+; AVX-NEXT: vpmovzxbd {{.*#+}} xmm1 = mem[0],zero,zero,zero,mem[1],zero,zero,zero,mem[2],zero,zero,zero,mem[3],zero,zero,zero
+; AVX-NEXT: vpunpckhqdq {{.*#+}} xmm0 = xmm1[1],xmm0[1]
+; AVX-NEXT: retq
+ %A = load <4 x i8>* %a
+ %B = load <4 x i8>* %b
+ %1 = shufflevector <4 x i8> %A, <4 x i8> %B, <4 x i32> <i32 2, i32 3, i32 5, i32 5>
+ %2 = shufflevector <4 x i8> %1, <4 x i8> %B, <4 x i32> <i32 6, i32 7, i32 0, i32 1>
+ ret <4 x i8> %2
+}
+
+define <4 x i8> @combine_test4c(<4 x i8>* %a, <4 x i8>* %b) {
+; SSE2-LABEL: combine_test4c:
+; SSE2: # BB#0:
+; SSE2-NEXT: movd {{.*#+}} xmm0 = mem[0],zero,zero,zero
+; SSE2-NEXT: punpcklbw {{.*#+}} xmm0 = xmm0[0,0,1,1,2,2,3,3,4,4,5,5,6,6,7,7]
+; SSE2-NEXT: punpcklwd {{.*#+}} xmm0 = xmm0[0,0,1,1,2,2,3,3]
+; SSE2-NEXT: movd {{.*#+}} xmm1 = mem[0],zero,zero,zero
+; SSE2-NEXT: punpcklbw {{.*#+}} xmm1 = xmm1[0],xmm0[0],xmm1[1],xmm0[1],xmm1[2],xmm0[2],xmm1[3],xmm0[3],xmm1[4],xmm0[4],xmm1[5],xmm0[5],xmm1[6],xmm0[6],xmm1[7],xmm0[7]
+; SSE2-NEXT: punpcklwd {{.*#+}} xmm1 = xmm1[0],xmm0[0],xmm1[1],xmm0[1],xmm1[2],xmm0[2],xmm1[3],xmm0[3]
+; SSE2-NEXT: shufps {{.*#+}} xmm0 = xmm0[1,0],xmm1[0,0]
+; SSE2-NEXT: shufps {{.*#+}} xmm0 = xmm0[2,0],xmm1[2,3]
+; SSE2-NEXT: retq
+;
+; SSSE3-LABEL: combine_test4c:
+; SSSE3: # BB#0:
+; SSSE3-NEXT: movd {{.*#+}} xmm0 = mem[0],zero,zero,zero
+; SSSE3-NEXT: punpcklbw {{.*#+}} xmm0 = xmm0[0,0,1,1,2,2,3,3,4,4,5,5,6,6,7,7]
+; SSSE3-NEXT: punpcklwd {{.*#+}} xmm0 = xmm0[0,0,1,1,2,2,3,3]
+; SSSE3-NEXT: movd {{.*#+}} xmm1 = mem[0],zero,zero,zero
+; SSSE3-NEXT: punpcklbw {{.*#+}} xmm1 = xmm1[0],xmm0[0],xmm1[1],xmm0[1],xmm1[2],xmm0[2],xmm1[3],xmm0[3],xmm1[4],xmm0[4],xmm1[5],xmm0[5],xmm1[6],xmm0[6],xmm1[7],xmm0[7]
+; SSSE3-NEXT: punpcklwd {{.*#+}} xmm1 = xmm1[0],xmm0[0],xmm1[1],xmm0[1],xmm1[2],xmm0[2],xmm1[3],xmm0[3]
+; SSSE3-NEXT: shufps {{.*#+}} xmm0 = xmm0[1,0],xmm1[0,0]
+; SSSE3-NEXT: shufps {{.*#+}} xmm0 = xmm0[2,0],xmm1[2,3]
+; SSSE3-NEXT: retq
+;
+; SSE41-LABEL: combine_test4c:
+; SSE41: # BB#0:
+; SSE41-NEXT: pmovzxbd {{.*#+}} xmm1 = mem[0],zero,zero,zero,mem[1],zero,zero,zero,mem[2],zero,zero,zero,mem[3],zero,zero,zero
+; SSE41-NEXT: pmovzxbd {{.*#+}} xmm0 = mem[0],zero,zero,zero,mem[1],zero,zero,zero,mem[2],zero,zero,zero,mem[3],zero,zero,zero
+; SSE41-NEXT: pblendw {{.*#+}} xmm0 = xmm0[0,1],xmm1[2,3],xmm0[4,5,6,7]
+; SSE41-NEXT: retq
+;
+; AVX1-LABEL: combine_test4c:
+; AVX1: # BB#0:
+; AVX1-NEXT: vpmovzxbd {{.*#+}} xmm0 = mem[0],zero,zero,zero,mem[1],zero,zero,zero,mem[2],zero,zero,zero,mem[3],zero,zero,zero
+; AVX1-NEXT: vpmovzxbd {{.*#+}} xmm1 = mem[0],zero,zero,zero,mem[1],zero,zero,zero,mem[2],zero,zero,zero,mem[3],zero,zero,zero
+; AVX1-NEXT: vpblendw {{.*#+}} xmm0 = xmm1[0,1],xmm0[2,3],xmm1[4,5,6,7]
+; AVX1-NEXT: retq
+;
+; AVX2-LABEL: combine_test4c:
+; AVX2: # BB#0:
+; AVX2-NEXT: vpmovzxbd {{.*#+}} xmm0 = mem[0],zero,zero,zero,mem[1],zero,zero,zero,mem[2],zero,zero,zero,mem[3],zero,zero,zero
+; AVX2-NEXT: vpmovzxbd {{.*#+}} xmm1 = mem[0],zero,zero,zero,mem[1],zero,zero,zero,mem[2],zero,zero,zero,mem[3],zero,zero,zero
+; AVX2-NEXT: vpblendd {{.*#+}} xmm0 = xmm1[0],xmm0[1],xmm1[2,3]
+; AVX2-NEXT: retq
+ %A = load <4 x i8>* %a
+ %B = load <4 x i8>* %b
+ %1 = shufflevector <4 x i8> %A, <4 x i8> %B, <4 x i32> <i32 4, i32 1, i32 6, i32 3>
+ %2 = shufflevector <4 x i8> %1, <4 x i8> %B, <4 x i32> <i32 0, i32 1, i32 2, i32 7>
+ ret <4 x i8> %2
+}
+
+
+; The following test cases are generated from this C++ code
+;
+;__m128 blend_01(__m128 a, __m128 b)
+;{
+; __m128 s = a;
+; s = _mm_blend_ps( s, b, 1<<0 );
+; s = _mm_blend_ps( s, b, 1<<1 );
+; return s;
+;}
+;
+;__m128 blend_02(__m128 a, __m128 b)
+;{
+; __m128 s = a;
+; s = _mm_blend_ps( s, b, 1<<0 );
+; s = _mm_blend_ps( s, b, 1<<2 );
+; return s;
+;}
+;
+;__m128 blend_123(__m128 a, __m128 b)
+;{
+; __m128 s = a;
+; s = _mm_blend_ps( s, b, 1<<1 );
+; s = _mm_blend_ps( s, b, 1<<2 );
+; s = _mm_blend_ps( s, b, 1<<3 );
+; return s;
+;}
+
+; Ideally, we should collapse the following shuffles into a single one.
+
+define <4 x float> @combine_blend_01(<4 x float> %a, <4 x float> %b) {
+; SSE2-LABEL: combine_blend_01:
+; SSE2: # BB#0:
+; SSE2-NEXT: movsd {{.*#+}} xmm0 = xmm1[0],xmm0[1]
+; SSE2-NEXT: retq
+;
+; SSSE3-LABEL: combine_blend_01:
+; SSSE3: # BB#0:
+; SSSE3-NEXT: movsd {{.*#+}} xmm0 = xmm1[0],xmm0[1]
+; SSSE3-NEXT: retq
+;
+; SSE41-LABEL: combine_blend_01:
+; SSE41: # BB#0:
+; SSE41-NEXT: blendpd {{.*#+}} xmm0 = xmm1[0],xmm0[1]
+; SSE41-NEXT: retq
+;
+; AVX-LABEL: combine_blend_01:
+; AVX: # BB#0:
+; AVX-NEXT: vblendpd {{.*#+}} xmm0 = xmm1[0],xmm0[1]
+; AVX-NEXT: retq
+ %shuffle = shufflevector <4 x float> %a, <4 x float> %b, <4 x i32> <i32 4, i32 undef, i32 2, i32 3>
+ %shuffle6 = shufflevector <4 x float> %shuffle, <4 x float> %b, <4 x i32> <i32 0, i32 5, i32 2, i32 3>
+ ret <4 x float> %shuffle6
+}
+
+define <4 x float> @combine_blend_02(<4 x float> %a, <4 x float> %b) {
+; SSE2-LABEL: combine_blend_02:
+; SSE2: # BB#0:
+; SSE2-NEXT: shufps {{.*#+}} xmm1 = xmm1[0,2],xmm0[1,3]
+; SSE2-NEXT: shufps {{.*#+}} xmm1 = xmm1[0,2,1,3]
+; SSE2-NEXT: movaps %xmm1, %xmm0
+; SSE2-NEXT: retq
+;
+; SSSE3-LABEL: combine_blend_02:
+; SSSE3: # BB#0:
+; SSSE3-NEXT: shufps {{.*#+}} xmm1 = xmm1[0,2],xmm0[1,3]
+; SSSE3-NEXT: shufps {{.*#+}} xmm1 = xmm1[0,2,1,3]
+; SSSE3-NEXT: movaps %xmm1, %xmm0
+; SSSE3-NEXT: retq
+;
+; SSE41-LABEL: combine_blend_02:
+; SSE41: # BB#0:
+; SSE41-NEXT: blendps {{.*#+}} xmm0 = xmm1[0],xmm0[1],xmm1[2],xmm0[3]
+; SSE41-NEXT: retq
+;
+; AVX-LABEL: combine_blend_02:
+; AVX: # BB#0:
+; AVX-NEXT: vblendps {{.*#+}} xmm0 = xmm1[0],xmm0[1],xmm1[2],xmm0[3]
+; AVX-NEXT: retq
+ %shuffle = shufflevector <4 x float> %a, <4 x float> %b, <4 x i32> <i32 4, i32 1, i32 undef, i32 3>
+ %shuffle6 = shufflevector <4 x float> %shuffle, <4 x float> %b, <4 x i32> <i32 0, i32 1, i32 6, i32 3>
+ ret <4 x float> %shuffle6
+}
+
+define <4 x float> @combine_blend_123(<4 x float> %a, <4 x float> %b) {
+; SSE2-LABEL: combine_blend_123:
+; SSE2: # BB#0:
+; SSE2-NEXT: movss {{.*#+}} xmm1 = xmm0[0],xmm1[1,2,3]
+; SSE2-NEXT: movaps %xmm1, %xmm0
+; SSE2-NEXT: retq
+;
+; SSSE3-LABEL: combine_blend_123:
+; SSSE3: # BB#0:
+; SSSE3-NEXT: movss {{.*#+}} xmm1 = xmm0[0],xmm1[1,2,3]
+; SSSE3-NEXT: movaps %xmm1, %xmm0
+; SSSE3-NEXT: retq
+;
+; SSE41-LABEL: combine_blend_123:
+; SSE41: # BB#0:
+; SSE41-NEXT: blendps {{.*#+}} xmm0 = xmm0[0],xmm1[1,2,3]
+; SSE41-NEXT: retq
+;
+; AVX-LABEL: combine_blend_123:
+; AVX: # BB#0:
+; AVX-NEXT: vblendps {{.*#+}} xmm0 = xmm0[0],xmm1[1,2,3]
+; AVX-NEXT: retq
+ %shuffle = shufflevector <4 x float> %a, <4 x float> %b, <4 x i32> <i32 0, i32 5, i32 undef, i32 undef>
+ %shuffle6 = shufflevector <4 x float> %shuffle, <4 x float> %b, <4 x i32> <i32 0, i32 1, i32 6, i32 undef>
+ %shuffle12 = shufflevector <4 x float> %shuffle6, <4 x float> %b, <4 x i32> <i32 0, i32 1, i32 2, i32 7>
+ ret <4 x float> %shuffle12
+}
+
+define <4 x i32> @combine_test_movhl_1(<4 x i32> %a, <4 x i32> %b) {
+; SSE-LABEL: combine_test_movhl_1:
+; SSE: # BB#0:
+; SSE-NEXT: punpckhqdq {{.*#+}} xmm1 = xmm1[1],xmm0[1]
+; SSE-NEXT: movdqa %xmm1, %xmm0
+; SSE-NEXT: retq
+;
+; AVX-LABEL: combine_test_movhl_1:
+; AVX: # BB#0:
+; AVX-NEXT: vpunpckhqdq {{.*#+}} xmm0 = xmm1[1],xmm0[1]
+; AVX-NEXT: retq
+ %1 = shufflevector <4 x i32> %a, <4 x i32> %b, <4 x i32> <i32 2, i32 7, i32 5, i32 3>
+ %2 = shufflevector <4 x i32> %1, <4 x i32> %b, <4 x i32> <i32 6, i32 1, i32 0, i32 3>
+ ret <4 x i32> %2
+}
+
+define <4 x i32> @combine_test_movhl_2(<4 x i32> %a, <4 x i32> %b) {
+; SSE-LABEL: combine_test_movhl_2:
+; SSE: # BB#0:
+; SSE-NEXT: punpckhqdq {{.*#+}} xmm1 = xmm1[1],xmm0[1]
+; SSE-NEXT: movdqa %xmm1, %xmm0
+; SSE-NEXT: retq
+;
+; AVX-LABEL: combine_test_movhl_2:
+; AVX: # BB#0:
+; AVX-NEXT: vpunpckhqdq {{.*#+}} xmm0 = xmm1[1],xmm0[1]
+; AVX-NEXT: retq
+ %1 = shufflevector <4 x i32> %a, <4 x i32> %b, <4 x i32> <i32 2, i32 0, i32 3, i32 6>
+ %2 = shufflevector <4 x i32> %1, <4 x i32> %b, <4 x i32> <i32 3, i32 7, i32 0, i32 2>
+ ret <4 x i32> %2
+}
+
+define <4 x i32> @combine_test_movhl_3(<4 x i32> %a, <4 x i32> %b) {
+; SSE-LABEL: combine_test_movhl_3:
+; SSE: # BB#0:
+; SSE-NEXT: punpckhqdq {{.*#+}} xmm1 = xmm1[1],xmm0[1]
+; SSE-NEXT: movdqa %xmm1, %xmm0
+; SSE-NEXT: retq
+;
+; AVX-LABEL: combine_test_movhl_3:
+; AVX: # BB#0:
+; AVX-NEXT: vpunpckhqdq {{.*#+}} xmm0 = xmm1[1],xmm0[1]
+; AVX-NEXT: retq
+ %1 = shufflevector <4 x i32> %a, <4 x i32> %b, <4 x i32> <i32 7, i32 6, i32 3, i32 2>
+ %2 = shufflevector <4 x i32> %1, <4 x i32> %b, <4 x i32> <i32 6, i32 0, i32 3, i32 2>
+ ret <4 x i32> %2
+}
+
+
+; Verify that we fold shuffles according to rule:
+; (shuffle(shuffle A, Undef, M0), B, M1) -> (shuffle A, B, M2)
+
+define <4 x float> @combine_undef_input_test1(<4 x float> %a, <4 x float> %b) {
+; SSE2-LABEL: combine_undef_input_test1:
+; SSE2: # BB#0:
+; SSE2-NEXT: movsd {{.*#+}} xmm0 = xmm1[0],xmm0[1]
+; SSE2-NEXT: retq
+;
+; SSSE3-LABEL: combine_undef_input_test1:
+; SSSE3: # BB#0:
+; SSSE3-NEXT: movsd {{.*#+}} xmm0 = xmm1[0],xmm0[1]
+; SSSE3-NEXT: retq
+;
+; SSE41-LABEL: combine_undef_input_test1:
+; SSE41: # BB#0:
+; SSE41-NEXT: blendpd {{.*#+}} xmm0 = xmm1[0],xmm0[1]
+; SSE41-NEXT: retq
+;
+; AVX-LABEL: combine_undef_input_test1:
+; AVX: # BB#0:
+; AVX-NEXT: vblendpd {{.*#+}} xmm0 = xmm1[0],xmm0[1]
+; AVX-NEXT: retq
+ %1 = shufflevector <4 x float> %a, <4 x float> undef, <4 x i32> <i32 4, i32 2, i32 3, i32 1>
+ %2 = shufflevector <4 x float> %1, <4 x float> %b, <4 x i32> <i32 4, i32 5, i32 1, i32 2>
+ ret <4 x float> %2
+}
+
+define <4 x float> @combine_undef_input_test2(<4 x float> %a, <4 x float> %b) {
+; SSE-LABEL: combine_undef_input_test2:
+; SSE: # BB#0:
+; SSE-NEXT: unpcklpd {{.*#+}} xmm0 = xmm0[0],xmm1[0]
+; SSE-NEXT: retq
+;
+; AVX-LABEL: combine_undef_input_test2:
+; AVX: # BB#0:
+; AVX-NEXT: vunpcklpd {{.*#+}} xmm0 = xmm0[0],xmm1[0]
+; AVX-NEXT: retq
+ %1 = shufflevector <4 x float> %a, <4 x float> undef, <4 x i32> <i32 6, i32 0, i32 1, i32 7>
+ %2 = shufflevector <4 x float> %1, <4 x float> %b, <4 x i32> <i32 1, i32 2, i32 4, i32 5>
+ ret <4 x float> %2
+}
+
+define <4 x float> @combine_undef_input_test3(<4 x float> %a, <4 x float> %b) {
+; SSE-LABEL: combine_undef_input_test3:
+; SSE: # BB#0:
+; SSE-NEXT: unpcklpd {{.*#+}} xmm0 = xmm0[0],xmm1[0]
+; SSE-NEXT: retq
+;
+; AVX-LABEL: combine_undef_input_test3:
+; AVX: # BB#0:
+; AVX-NEXT: vunpcklpd {{.*#+}} xmm0 = xmm0[0],xmm1[0]
+; AVX-NEXT: retq
+ %1 = shufflevector <4 x float> %a, <4 x float> undef, <4 x i32> <i32 0, i32 5, i32 1, i32 7>
+ %2 = shufflevector <4 x float> %1, <4 x float> %b, <4 x i32> <i32 0, i32 2, i32 4, i32 1>
+ ret <4 x float> %2
+}
+
+define <4 x float> @combine_undef_input_test4(<4 x float> %a, <4 x float> %b) {
+; SSE-LABEL: combine_undef_input_test4:
+; SSE: # BB#0:
+; SSE-NEXT: unpckhpd {{.*#+}} xmm1 = xmm1[1],xmm0[1]
+; SSE-NEXT: movapd %xmm1, %xmm0
+; SSE-NEXT: retq
+;
+; AVX-LABEL: combine_undef_input_test4:
+; AVX: # BB#0:
+; AVX-NEXT: vunpckhpd {{.*#+}} xmm0 = xmm1[1],xmm0[1]
+; AVX-NEXT: retq
+ %1 = shufflevector <4 x float> %a, <4 x float> undef, <4 x i32> <i32 2, i32 3, i32 5, i32 5>
+ %2 = shufflevector <4 x float> %1, <4 x float> %b, <4 x i32> <i32 6, i32 7, i32 0, i32 1>
+ ret <4 x float> %2
+}
+
+define <4 x float> @combine_undef_input_test5(<4 x float> %a, <4 x float> %b) {
+; SSE2-LABEL: combine_undef_input_test5:
+; SSE2: # BB#0:
+; SSE2-NEXT: movsd {{.*#+}} xmm1 = xmm0[0],xmm1[1]
+; SSE2-NEXT: movapd %xmm1, %xmm0
+; SSE2-NEXT: retq
+;
+; SSSE3-LABEL: combine_undef_input_test5:
+; SSSE3: # BB#0:
+; SSSE3-NEXT: movsd {{.*#+}} xmm1 = xmm0[0],xmm1[1]
+; SSSE3-NEXT: movapd %xmm1, %xmm0
+; SSSE3-NEXT: retq
+;
+; SSE41-LABEL: combine_undef_input_test5:
+; SSE41: # BB#0:
+; SSE41-NEXT: blendpd {{.*#+}} xmm0 = xmm0[0],xmm1[1]
+; SSE41-NEXT: retq
+;
+; AVX-LABEL: combine_undef_input_test5:
+; AVX: # BB#0:
+; AVX-NEXT: vblendpd {{.*#+}} xmm0 = xmm0[0],xmm1[1]
+; AVX-NEXT: retq
+ %1 = shufflevector <4 x float> %a, <4 x float> undef, <4 x i32> <i32 0, i32 4, i32 1, i32 3>
+ %2 = shufflevector <4 x float> %1, <4 x float> %b, <4 x i32> <i32 0, i32 2, i32 6, i32 7>
+ ret <4 x float> %2
+}
+
+
+; Verify that we fold shuffles according to rule:
+; (shuffle(shuffle A, Undef, M0), A, M1) -> (shuffle A, Undef, M2)
+
+define <4 x float> @combine_undef_input_test6(<4 x float> %a) {
+; ALL-LABEL: combine_undef_input_test6:
+; ALL: # BB#0:
+; ALL-NEXT: retq
+ %1 = shufflevector <4 x float> %a, <4 x float> undef, <4 x i32> <i32 4, i32 2, i32 3, i32 1>
+ %2 = shufflevector <4 x float> %1, <4 x float> %a, <4 x i32> <i32 4, i32 5, i32 1, i32 2>
+ ret <4 x float> %2
+}
+
+define <4 x float> @combine_undef_input_test7(<4 x float> %a) {
+; SSE2-LABEL: combine_undef_input_test7:
+; SSE2: # BB#0:
+; SSE2-NEXT: movlhps {{.*#+}} xmm0 = xmm0[0,0]
+; SSE2-NEXT: retq
+;
+; SSSE3-LABEL: combine_undef_input_test7:
+; SSSE3: # BB#0:
+; SSSE3-NEXT: movddup {{.*#+}} xmm0 = xmm0[0,0]
+; SSSE3-NEXT: retq
+;
+; SSE41-LABEL: combine_undef_input_test7:
+; SSE41: # BB#0:
+; SSE41-NEXT: movddup {{.*#+}} xmm0 = xmm0[0,0]
+; SSE41-NEXT: retq
+;
+; AVX-LABEL: combine_undef_input_test7:
+; AVX: # BB#0:
+; AVX-NEXT: vmovddup {{.*#+}} xmm0 = xmm0[0,0]
+; AVX-NEXT: retq
+ %1 = shufflevector <4 x float> %a, <4 x float> undef, <4 x i32> <i32 6, i32 0, i32 1, i32 7>
+ %2 = shufflevector <4 x float> %1, <4 x float> %a, <4 x i32> <i32 1, i32 2, i32 4, i32 5>
+ ret <4 x float> %2
+}
+
+define <4 x float> @combine_undef_input_test8(<4 x float> %a) {
+; SSE2-LABEL: combine_undef_input_test8:
+; SSE2: # BB#0:
+; SSE2-NEXT: movlhps {{.*#+}} xmm0 = xmm0[0,0]
+; SSE2-NEXT: retq
+;
+; SSSE3-LABEL: combine_undef_input_test8:
+; SSSE3: # BB#0:
+; SSSE3-NEXT: movddup {{.*#+}} xmm0 = xmm0[0,0]
+; SSSE3-NEXT: retq
+;
+; SSE41-LABEL: combine_undef_input_test8:
+; SSE41: # BB#0:
+; SSE41-NEXT: movddup {{.*#+}} xmm0 = xmm0[0,0]
+; SSE41-NEXT: retq
+;
+; AVX-LABEL: combine_undef_input_test8:
+; AVX: # BB#0:
+; AVX-NEXT: vmovddup {{.*#+}} xmm0 = xmm0[0,0]
+; AVX-NEXT: retq
+ %1 = shufflevector <4 x float> %a, <4 x float> undef, <4 x i32> <i32 0, i32 5, i32 1, i32 7>
+ %2 = shufflevector <4 x float> %1, <4 x float> %a, <4 x i32> <i32 0, i32 2, i32 4, i32 1>
+ ret <4 x float> %2
+}
+
+define <4 x float> @combine_undef_input_test9(<4 x float> %a) {
+; SSE-LABEL: combine_undef_input_test9:
+; SSE: # BB#0:
+; SSE-NEXT: movhlps {{.*#+}} xmm0 = xmm0[1,1]
+; SSE-NEXT: retq
+;
+; AVX-LABEL: combine_undef_input_test9:
+; AVX: # BB#0:
+; AVX-NEXT: vmovhlps {{.*#+}} xmm0 = xmm0[1,1]
+; AVX-NEXT: retq
+ %1 = shufflevector <4 x float> %a, <4 x float> undef, <4 x i32> <i32 2, i32 3, i32 5, i32 5>
+ %2 = shufflevector <4 x float> %1, <4 x float> %a, <4 x i32> <i32 6, i32 7, i32 0, i32 1>
+ ret <4 x float> %2
+}
+
+define <4 x float> @combine_undef_input_test10(<4 x float> %a) {
+; ALL-LABEL: combine_undef_input_test10:
+; ALL: # BB#0:
+; ALL-NEXT: retq
+ %1 = shufflevector <4 x float> %a, <4 x float> undef, <4 x i32> <i32 0, i32 4, i32 1, i32 3>
+ %2 = shufflevector <4 x float> %1, <4 x float> %a, <4 x i32> <i32 0, i32 2, i32 6, i32 7>
+ ret <4 x float> %2
+}
+
+define <4 x float> @combine_undef_input_test11(<4 x float> %a, <4 x float> %b) {
+; SSE2-LABEL: combine_undef_input_test11:
+; SSE2: # BB#0:
+; SSE2-NEXT: movsd {{.*#+}} xmm0 = xmm1[0],xmm0[1]
+; SSE2-NEXT: retq
+;
+; SSSE3-LABEL: combine_undef_input_test11:
+; SSSE3: # BB#0:
+; SSSE3-NEXT: movsd {{.*#+}} xmm0 = xmm1[0],xmm0[1]
+; SSSE3-NEXT: retq
+;
+; SSE41-LABEL: combine_undef_input_test11:
+; SSE41: # BB#0:
+; SSE41-NEXT: blendpd {{.*#+}} xmm0 = xmm1[0],xmm0[1]
+; SSE41-NEXT: retq
+;
+; AVX-LABEL: combine_undef_input_test11:
+; AVX: # BB#0:
+; AVX-NEXT: vblendpd {{.*#+}} xmm0 = xmm1[0],xmm0[1]
+; AVX-NEXT: retq
+ %1 = shufflevector <4 x float> %a, <4 x float> undef, <4 x i32> <i32 4, i32 2, i32 3, i32 1>
+ %2 = shufflevector <4 x float> %b, <4 x float> %1, <4 x i32> <i32 0, i32 1, i32 5, i32 6>
+ ret <4 x float> %2
+}
+
+define <4 x float> @combine_undef_input_test12(<4 x float> %a, <4 x float> %b) {
+; SSE-LABEL: combine_undef_input_test12:
+; SSE: # BB#0:
+; SSE-NEXT: unpcklpd {{.*#+}} xmm0 = xmm0[0],xmm1[0]
+; SSE-NEXT: retq
+;
+; AVX-LABEL: combine_undef_input_test12:
+; AVX: # BB#0:
+; AVX-NEXT: vunpcklpd {{.*#+}} xmm0 = xmm0[0],xmm1[0]
+; AVX-NEXT: retq
+ %1 = shufflevector <4 x float> %a, <4 x float> undef, <4 x i32> <i32 6, i32 0, i32 1, i32 7>
+ %2 = shufflevector <4 x float> %b, <4 x float> %1, <4 x i32> <i32 5, i32 6, i32 0, i32 1>
+ ret <4 x float> %2
+}
+
+define <4 x float> @combine_undef_input_test13(<4 x float> %a, <4 x float> %b) {
+; SSE-LABEL: combine_undef_input_test13:
+; SSE: # BB#0:
+; SSE-NEXT: unpcklpd {{.*#+}} xmm0 = xmm0[0],xmm1[0]
+; SSE-NEXT: retq
+;
+; AVX-LABEL: combine_undef_input_test13:
+; AVX: # BB#0:
+; AVX-NEXT: vunpcklpd {{.*#+}} xmm0 = xmm0[0],xmm1[0]
+; AVX-NEXT: retq
+ %1 = shufflevector <4 x float> %a, <4 x float> undef, <4 x i32> <i32 0, i32 5, i32 1, i32 7>
+ %2 = shufflevector <4 x float> %b, <4 x float> %1, <4 x i32> <i32 4, i32 5, i32 0, i32 5>
+ ret <4 x float> %2
+}
+
+define <4 x float> @combine_undef_input_test14(<4 x float> %a, <4 x float> %b) {
+; SSE-LABEL: combine_undef_input_test14:
+; SSE: # BB#0:
+; SSE-NEXT: unpckhpd {{.*#+}} xmm1 = xmm1[1],xmm0[1]
+; SSE-NEXT: movapd %xmm1, %xmm0
+; SSE-NEXT: retq
+;
+; AVX-LABEL: combine_undef_input_test14:
+; AVX: # BB#0:
+; AVX-NEXT: vunpckhpd {{.*#+}} xmm0 = xmm1[1],xmm0[1]
+; AVX-NEXT: retq
+ %1 = shufflevector <4 x float> %a, <4 x float> undef, <4 x i32> <i32 2, i32 3, i32 5, i32 5>
+ %2 = shufflevector <4 x float> %b, <4 x float> %1, <4 x i32> <i32 2, i32 3, i32 4, i32 5>
+ ret <4 x float> %2
+}
+
+define <4 x float> @combine_undef_input_test15(<4 x float> %a, <4 x float> %b) {
+; SSE2-LABEL: combine_undef_input_test15:
+; SSE2: # BB#0:
+; SSE2-NEXT: movsd {{.*#+}} xmm1 = xmm0[0],xmm1[1]
+; SSE2-NEXT: movapd %xmm1, %xmm0
+; SSE2-NEXT: retq
+;
+; SSSE3-LABEL: combine_undef_input_test15:
+; SSSE3: # BB#0:
+; SSSE3-NEXT: movsd {{.*#+}} xmm1 = xmm0[0],xmm1[1]
+; SSSE3-NEXT: movapd %xmm1, %xmm0
+; SSSE3-NEXT: retq
+;
+; SSE41-LABEL: combine_undef_input_test15:
+; SSE41: # BB#0:
+; SSE41-NEXT: blendpd {{.*#+}} xmm0 = xmm0[0],xmm1[1]
+; SSE41-NEXT: retq
+;
+; AVX-LABEL: combine_undef_input_test15:
+; AVX: # BB#0:
+; AVX-NEXT: vblendpd {{.*#+}} xmm0 = xmm0[0],xmm1[1]
+; AVX-NEXT: retq
+ %1 = shufflevector <4 x float> %a, <4 x float> undef, <4 x i32> <i32 0, i32 4, i32 1, i32 3>
+ %2 = shufflevector <4 x float> %b, <4 x float> %1, <4 x i32> <i32 4, i32 6, i32 2, i32 3>
+ ret <4 x float> %2
+}
+
+
+; Verify that shuffles are canonicalized according to rules:
+; shuffle(B, shuffle(A, Undef)) -> shuffle(shuffle(A, Undef), B)
+;
+; This allows to trigger the following combine rule:
+; (shuffle(shuffle A, Undef, M0), A, M1) -> (shuffle A, Undef, M2)
+;
+; As a result, all the shuffle pairs in each function below should be
+; combined into a single legal shuffle operation.
+
+define <4 x float> @combine_undef_input_test16(<4 x float> %a) {
+; ALL-LABEL: combine_undef_input_test16:
+; ALL: # BB#0:
+; ALL-NEXT: retq
+ %1 = shufflevector <4 x float> %a, <4 x float> undef, <4 x i32> <i32 4, i32 2, i32 3, i32 1>
+ %2 = shufflevector <4 x float> %a, <4 x float> %1, <4 x i32> <i32 0, i32 1, i32 5, i32 3>
+ ret <4 x float> %2
+}
+
+define <4 x float> @combine_undef_input_test17(<4 x float> %a) {
+; SSE2-LABEL: combine_undef_input_test17:
+; SSE2: # BB#0:
+; SSE2-NEXT: movlhps {{.*#+}} xmm0 = xmm0[0,0]
+; SSE2-NEXT: retq
+;
+; SSSE3-LABEL: combine_undef_input_test17:
+; SSSE3: # BB#0:
+; SSSE3-NEXT: movddup {{.*#+}} xmm0 = xmm0[0,0]
+; SSSE3-NEXT: retq
+;
+; SSE41-LABEL: combine_undef_input_test17:
+; SSE41: # BB#0:
+; SSE41-NEXT: movddup {{.*#+}} xmm0 = xmm0[0,0]
+; SSE41-NEXT: retq
+;
+; AVX-LABEL: combine_undef_input_test17:
+; AVX: # BB#0:
+; AVX-NEXT: vmovddup {{.*#+}} xmm0 = xmm0[0,0]
+; AVX-NEXT: retq
+ %1 = shufflevector <4 x float> %a, <4 x float> undef, <4 x i32> <i32 6, i32 0, i32 1, i32 7>
+ %2 = shufflevector <4 x float> %a, <4 x float> %1, <4 x i32> <i32 5, i32 6, i32 0, i32 1>
+ ret <4 x float> %2
+}
+
+define <4 x float> @combine_undef_input_test18(<4 x float> %a) {
+; SSE2-LABEL: combine_undef_input_test18:
+; SSE2: # BB#0:
+; SSE2-NEXT: movlhps {{.*#+}} xmm0 = xmm0[0,0]
+; SSE2-NEXT: retq
+;
+; SSSE3-LABEL: combine_undef_input_test18:
+; SSSE3: # BB#0:
+; SSSE3-NEXT: movddup {{.*#+}} xmm0 = xmm0[0,0]
+; SSSE3-NEXT: retq
+;
+; SSE41-LABEL: combine_undef_input_test18:
+; SSE41: # BB#0:
+; SSE41-NEXT: movddup {{.*#+}} xmm0 = xmm0[0,0]
+; SSE41-NEXT: retq
+;
+; AVX-LABEL: combine_undef_input_test18:
+; AVX: # BB#0:
+; AVX-NEXT: vmovddup {{.*#+}} xmm0 = xmm0[0,0]
+; AVX-NEXT: retq
+ %1 = shufflevector <4 x float> %a, <4 x float> undef, <4 x i32> <i32 0, i32 5, i32 1, i32 7>
+ %2 = shufflevector <4 x float> %a, <4 x float> %1, <4 x i32> <i32 4, i32 6, i32 0, i32 5>
+ ret <4 x float> %2
+}
+
+define <4 x float> @combine_undef_input_test19(<4 x float> %a) {
+; SSE-LABEL: combine_undef_input_test19:
+; SSE: # BB#0:
+; SSE-NEXT: movhlps {{.*#+}} xmm0 = xmm0[1,1]
+; SSE-NEXT: retq
+;
+; AVX-LABEL: combine_undef_input_test19:
+; AVX: # BB#0:
+; AVX-NEXT: vmovhlps {{.*#+}} xmm0 = xmm0[1,1]
+; AVX-NEXT: retq
+ %1 = shufflevector <4 x float> %a, <4 x float> undef, <4 x i32> <i32 2, i32 3, i32 5, i32 5>
+ %2 = shufflevector <4 x float> %a, <4 x float> %1, <4 x i32> <i32 2, i32 3, i32 4, i32 5>
+ ret <4 x float> %2
+}
+
+define <4 x float> @combine_undef_input_test20(<4 x float> %a) {
+; ALL-LABEL: combine_undef_input_test20:
+; ALL: # BB#0:
+; ALL-NEXT: retq
+ %1 = shufflevector <4 x float> %a, <4 x float> undef, <4 x i32> <i32 0, i32 4, i32 1, i32 3>
+ %2 = shufflevector <4 x float> %a, <4 x float> %1, <4 x i32> <i32 4, i32 6, i32 2, i32 3>
+ ret <4 x float> %2
+}
+
+; These tests are designed to test the ability to combine away unnecessary
+; operations feeding into a shuffle. The AVX cases are the important ones as
+; they leverage operations which cannot be done naturally on the entire vector
+; and thus are decomposed into multiple smaller operations.
+
+define <8 x i32> @combine_unneeded_subvector1(<8 x i32> %a) {
+; SSE-LABEL: combine_unneeded_subvector1:
+; SSE: # BB#0:
+; SSE-NEXT: paddd {{.*}}(%rip), %xmm1
+; SSE-NEXT: pshufd {{.*#+}} xmm0 = xmm1[3,2,1,0]
+; SSE-NEXT: movdqa %xmm0, %xmm1
+; SSE-NEXT: retq
+;
+; AVX1-LABEL: combine_unneeded_subvector1:
+; AVX1: # BB#0:
+; AVX1-NEXT: vextractf128 $1, %ymm0, %xmm0
+; AVX1-NEXT: vpaddd {{.*}}(%rip), %xmm0, %xmm0
+; AVX1-NEXT: vpermilps {{.*#+}} xmm0 = xmm0[3,2,1,0]
+; AVX1-NEXT: vinsertf128 $1, %xmm0, %ymm0, %ymm0
+; AVX1-NEXT: retq
+;
+; AVX2-LABEL: combine_unneeded_subvector1:
+; AVX2: # BB#0:
+; AVX2-NEXT: vpaddd {{.*}}(%rip), %ymm0, %ymm0
+; AVX2-NEXT: vmovdqa {{.*#+}} ymm1 = [7,6,5,4,7,6,5,4]
+; AVX2-NEXT: vpermd %ymm0, %ymm1, %ymm0
+; AVX2-NEXT: retq
+ %b = add <8 x i32> %a, <i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 8>
+ %c = shufflevector <8 x i32> %b, <8 x i32> undef, <8 x i32> <i32 7, i32 6, i32 5, i32 4, i32 7, i32 6, i32 5, i32 4>
+ ret <8 x i32> %c
+}
+
+define <8 x i32> @combine_unneeded_subvector2(<8 x i32> %a, <8 x i32> %b) {
+; SSE-LABEL: combine_unneeded_subvector2:
+; SSE: # BB#0:
+; SSE-NEXT: paddd {{.*}}(%rip), %xmm1
+; SSE-NEXT: pshufd {{.*#+}} xmm0 = xmm3[3,2,1,0]
+; SSE-NEXT: pshufd {{.*#+}} xmm1 = xmm1[3,2,1,0]
+; SSE-NEXT: retq
+;
+; AVX1-LABEL: combine_unneeded_subvector2:
+; AVX1: # BB#0:
+; AVX1-NEXT: vextractf128 $1, %ymm0, %xmm0
+; AVX1-NEXT: vpaddd {{.*}}(%rip), %xmm0, %xmm0
+; AVX1-NEXT: vinsertf128 $1, %xmm0, %ymm0, %ymm0
+; AVX1-NEXT: vperm2f128 {{.*#+}} ymm0 = ymm1[2,3],ymm0[2,3]
+; AVX1-NEXT: vpermilps {{.*#+}} ymm0 = ymm0[3,2,1,0,7,6,5,4]
+; AVX1-NEXT: retq
+;
+; AVX2-LABEL: combine_unneeded_subvector2:
+; AVX2: # BB#0:
+; AVX2-NEXT: vpaddd {{.*}}(%rip), %ymm0, %ymm0
+; AVX2-NEXT: vperm2i128 {{.*#+}} ymm0 = ymm1[2,3],ymm0[2,3]
+; AVX2-NEXT: vpshufd {{.*#+}} ymm0 = ymm0[3,2,1,0,7,6,5,4]
+; AVX2-NEXT: retq
+ %c = add <8 x i32> %a, <i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 8>
+ %d = shufflevector <8 x i32> %b, <8 x i32> %c, <8 x i32> <i32 7, i32 6, i32 5, i32 4, i32 15, i32 14, i32 13, i32 12>
+ ret <8 x i32> %d
+}
+
+define <4 x float> @combine_insertps1(<4 x float> %a, <4 x float> %b) {
+; SSE2-LABEL: combine_insertps1:
+; SSE2: # BB#0:
+; SSE2-NEXT: shufps {{.*#+}} xmm1 = xmm1[2,0],xmm0[1,0]
+; SSE2-NEXT: shufps {{.*#+}} xmm1 = xmm1[0,2],xmm0[2,3]
+; SSE2-NEXT: movaps %xmm1, %xmm0
+; SSE2-NEXT: retq
+;
+; SSSE3-LABEL: combine_insertps1:
+; SSSE3: # BB#0:
+; SSSE3-NEXT: shufps {{.*#+}} xmm1 = xmm1[2,0],xmm0[1,0]
+; SSSE3-NEXT: shufps {{.*#+}} xmm1 = xmm1[0,2],xmm0[2,3]
+; SSSE3-NEXT: movaps %xmm1, %xmm0
+; SSSE3-NEXT: retq
+;
+; SSE41-LABEL: combine_insertps1:
+; SSE41: # BB#0:
+; SSE41-NEXT: insertps {{.*#+}} xmm0 = xmm1[2],xmm0[1,2,3]
+; SSE41-NEXT: retq
+;
+; AVX-LABEL: combine_insertps1:
+; AVX: # BB#0:
+; AVX-NEXT: vinsertps {{.*#+}} xmm0 = xmm1[2],xmm0[1,2,3]
+; AVX-NEXT: retq
+
+ %c = shufflevector <4 x float> %a, <4 x float> %b, <4 x i32><i32 0, i32 6, i32 2, i32 4>
+ %d = shufflevector <4 x float> %a, <4 x float> %c, <4 x i32> <i32 5, i32 1, i32 6, i32 3>
+ ret <4 x float> %d
+}
+
+define <4 x float> @combine_insertps2(<4 x float> %a, <4 x float> %b) {
+; SSE2-LABEL: combine_insertps2:
+; SSE2: # BB#0:
+; SSE2-NEXT: shufps {{.*#+}} xmm1 = xmm1[2,0],xmm0[0,0]
+; SSE2-NEXT: shufps {{.*#+}} xmm1 = xmm1[2,0],xmm0[2,3]
+; SSE2-NEXT: movaps %xmm1, %xmm0
+; SSE2-NEXT: retq
+;
+; SSSE3-LABEL: combine_insertps2:
+; SSSE3: # BB#0:
+; SSSE3-NEXT: shufps {{.*#+}} xmm1 = xmm1[2,0],xmm0[0,0]
+; SSSE3-NEXT: shufps {{.*#+}} xmm1 = xmm1[2,0],xmm0[2,3]
+; SSSE3-NEXT: movaps %xmm1, %xmm0
+; SSSE3-NEXT: retq
+;
+; SSE41-LABEL: combine_insertps2:
+; SSE41: # BB#0:
+; SSE41-NEXT: insertps {{.*#+}} xmm0 = xmm0[0],xmm1[2],xmm0[2,3]
+; SSE41-NEXT: retq
+;
+; AVX-LABEL: combine_insertps2:
+; AVX: # BB#0:
+; AVX-NEXT: vinsertps {{.*#+}} xmm0 = xmm0[0],xmm1[2],xmm0[2,3]
+; AVX-NEXT: retq
+
+ %c = shufflevector <4 x float> %a, <4 x float> %b, <4 x i32><i32 0, i32 1, i32 6, i32 7>
+ %d = shufflevector <4 x float> %a, <4 x float> %c, <4 x i32> <i32 4, i32 6, i32 2, i32 3>
+ ret <4 x float> %d
+}
+
+define <4 x float> @combine_insertps3(<4 x float> %a, <4 x float> %b) {
+; SSE2-LABEL: combine_insertps3:
+; SSE2: # BB#0:
+; SSE2-NEXT: shufps {{.*#+}} xmm1 = xmm1[0,0],xmm0[3,0]
+; SSE2-NEXT: shufps {{.*#+}} xmm0 = xmm0[0,1],xmm1[0,2]
+; SSE2-NEXT: retq
+;
+; SSSE3-LABEL: combine_insertps3:
+; SSSE3: # BB#0:
+; SSSE3-NEXT: shufps {{.*#+}} xmm1 = xmm1[0,0],xmm0[3,0]
+; SSSE3-NEXT: shufps {{.*#+}} xmm0 = xmm0[0,1],xmm1[0,2]
+; SSSE3-NEXT: retq
+;
+; SSE41-LABEL: combine_insertps3:
+; SSE41: # BB#0:
+; SSE41-NEXT: insertps {{.*#+}} xmm0 = xmm0[0,1],xmm1[0],xmm0[3]
+; SSE41-NEXT: retq
+;
+; AVX-LABEL: combine_insertps3:
+; AVX: # BB#0:
+; AVX-NEXT: vinsertps {{.*#+}} xmm0 = xmm0[0,1],xmm1[0],xmm0[3]
+; AVX-NEXT: retq
+
+ %c = shufflevector <4 x float> %a, <4 x float> %b, <4 x i32><i32 0, i32 4, i32 2, i32 5>
+ %d = shufflevector <4 x float> %a, <4 x float> %c, <4 x i32><i32 4, i32 1, i32 5, i32 3>
+ ret <4 x float> %d
+}
+
+define <4 x float> @combine_insertps4(<4 x float> %a, <4 x float> %b) {
+; SSE2-LABEL: combine_insertps4:
+; SSE2: # BB#0:
+; SSE2-NEXT: shufps {{.*#+}} xmm1 = xmm1[0,0],xmm0[2,0]
+; SSE2-NEXT: shufps {{.*#+}} xmm0 = xmm0[0,1],xmm1[2,0]
+; SSE2-NEXT: retq
+;
+; SSSE3-LABEL: combine_insertps4:
+; SSSE3: # BB#0:
+; SSSE3-NEXT: shufps {{.*#+}} xmm1 = xmm1[0,0],xmm0[2,0]
+; SSSE3-NEXT: shufps {{.*#+}} xmm0 = xmm0[0,1],xmm1[2,0]
+; SSSE3-NEXT: retq
+;
+; SSE41-LABEL: combine_insertps4:
+; SSE41: # BB#0:
+; SSE41-NEXT: insertps {{.*#+}} xmm0 = xmm0[0,1,2],xmm1[0]
+; SSE41-NEXT: retq
+;
+; AVX-LABEL: combine_insertps4:
+; AVX: # BB#0:
+; AVX-NEXT: vinsertps {{.*#+}} xmm0 = xmm0[0,1,2],xmm1[0]
+; AVX-NEXT: retq
+
+ %c = shufflevector <4 x float> %a, <4 x float> %b, <4 x i32><i32 0, i32 4, i32 2, i32 5>
+ %d = shufflevector <4 x float> %a, <4 x float> %c, <4 x i32><i32 4, i32 1, i32 6, i32 5>
+ ret <4 x float> %d
+}
+
+define <4 x float> @PR22377(<4 x float> %a, <4 x float> %b) {
+; SSE-LABEL: PR22377:
+; SSE: # BB#0: # %entry
+; SSE-NEXT: movaps %xmm0, %xmm1
+; SSE-NEXT: shufps {{.*#+}} xmm1 = xmm1[1,3,1,3]
+; SSE-NEXT: shufps {{.*#+}} xmm0 = xmm0[0,2,0,2]
+; SSE-NEXT: addps %xmm0, %xmm1
+; SSE-NEXT: unpcklps {{.*#+}} xmm0 = xmm0[0],xmm1[0],xmm0[1],xmm1[1]
+; SSE-NEXT: retq
+;
+; AVX-LABEL: PR22377:
+; AVX: # BB#0: # %entry
+; AVX-NEXT: vpermilps {{.*#+}} xmm1 = xmm0[1,3,1,3]
+; AVX-NEXT: vpermilps {{.*#+}} xmm0 = xmm0[0,2,0,2]
+; AVX-NEXT: vaddps %xmm0, %xmm1, %xmm1
+; AVX-NEXT: vunpcklps {{.*#+}} xmm0 = xmm0[0],xmm1[0],xmm0[1],xmm1[1]
+; AVX-NEXT: retq
+entry:
+ %s1 = shufflevector <4 x float> %a, <4 x float> undef, <4 x i32> <i32 1, i32 3, i32 1, i32 3>
+ %s2 = shufflevector <4 x float> %a, <4 x float> undef, <4 x i32> <i32 0, i32 2, i32 0, i32 2>
+ %r2 = fadd <4 x float> %s1, %s2
+ %s3 = shufflevector <4 x float> %s2, <4 x float> %r2, <4 x i32> <i32 0, i32 4, i32 1, i32 5>
+ ret <4 x float> %s3
+}
+
+define <4 x float> @PR22390(<4 x float> %a, <4 x float> %b) {
+; SSE2-LABEL: PR22390:
+; SSE2: # BB#0: # %entry
+; SSE2-NEXT: shufps {{.*#+}} xmm0 = xmm0[3,0,1,2]
+; SSE2-NEXT: movaps %xmm0, %xmm2
+; SSE2-NEXT: movss {{.*#+}} xmm2 = xmm1[0],xmm2[1,2,3]
+; SSE2-NEXT: addps %xmm0, %xmm2
+; SSE2-NEXT: movaps %xmm2, %xmm0
+; SSE2-NEXT: retq
+;
+; SSSE3-LABEL: PR22390:
+; SSSE3: # BB#0: # %entry
+; SSSE3-NEXT: shufps {{.*#+}} xmm0 = xmm0[3,0,1,2]
+; SSSE3-NEXT: movaps %xmm0, %xmm2
+; SSSE3-NEXT: movss {{.*#+}} xmm2 = xmm1[0],xmm2[1,2,3]
+; SSSE3-NEXT: addps %xmm0, %xmm2
+; SSSE3-NEXT: movaps %xmm2, %xmm0
+; SSSE3-NEXT: retq
+;
+; SSE41-LABEL: PR22390:
+; SSE41: # BB#0: # %entry
+; SSE41-NEXT: shufps {{.*#+}} xmm0 = xmm0[3,0,1,2]
+; SSE41-NEXT: blendps {{.*#+}} xmm1 = xmm1[0],xmm0[1,2,3]
+; SSE41-NEXT: addps %xmm1, %xmm0
+; SSE41-NEXT: retq
+;
+; AVX-LABEL: PR22390:
+; AVX: # BB#0: # %entry
+; AVX-NEXT: vpermilps {{.*#+}} xmm0 = xmm0[3,0,1,2]
+; AVX-NEXT: vblendps {{.*#+}} xmm1 = xmm1[0],xmm0[1,2,3]
+; AVX-NEXT: vaddps %xmm1, %xmm0, %xmm0
+; AVX-NEXT: retq
+entry:
+ %s1 = shufflevector <4 x float> %a, <4 x float> undef, <4 x i32> <i32 3, i32 0, i32 1, i32 2>
+ %s2 = shufflevector <4 x float> %s1, <4 x float> %b, <4 x i32> <i32 4, i32 1, i32 2, i32 3>
+ %r2 = fadd <4 x float> %s1, %s2
+ ret <4 x float> %r2
+}
+
+define <8 x float> @PR22412(<8 x float> %a, <8 x float> %b) {
+; SSE2-LABEL: PR22412:
+; SSE2: # BB#0: # %entry
+; SSE2-NEXT: movsd {{.*#+}} xmm2 = xmm0[0],xmm2[1]
+; SSE2-NEXT: movapd %xmm2, %xmm0
+; SSE2-NEXT: shufps {{.*#+}} xmm0 = xmm0[1,0],xmm3[3,2]
+; SSE2-NEXT: shufps {{.*#+}} xmm3 = xmm3[1,0],xmm2[3,2]
+; SSE2-NEXT: movaps %xmm3, %xmm1
+; SSE2-NEXT: retq
+;
+; SSSE3-LABEL: PR22412:
+; SSSE3: # BB#0: # %entry
+; SSSE3-NEXT: movsd {{.*#+}} xmm2 = xmm0[0],xmm2[1]
+; SSSE3-NEXT: movapd %xmm2, %xmm0
+; SSSE3-NEXT: shufps {{.*#+}} xmm0 = xmm0[1,0],xmm3[3,2]
+; SSSE3-NEXT: shufps {{.*#+}} xmm3 = xmm3[1,0],xmm2[3,2]
+; SSSE3-NEXT: movaps %xmm3, %xmm1
+; SSSE3-NEXT: retq
+;
+; SSE41-LABEL: PR22412:
+; SSE41: # BB#0: # %entry
+; SSE41-NEXT: blendpd {{.*#+}} xmm0 = xmm0[0],xmm2[1]
+; SSE41-NEXT: movapd %xmm0, %xmm1
+; SSE41-NEXT: shufps {{.*#+}} xmm1 = xmm1[1,0],xmm3[3,2]
+; SSE41-NEXT: shufps {{.*#+}} xmm3 = xmm3[1,0],xmm0[3,2]
+; SSE41-NEXT: movaps %xmm1, %xmm0
+; SSE41-NEXT: movaps %xmm3, %xmm1
+; SSE41-NEXT: retq
+;
+; AVX1-LABEL: PR22412:
+; AVX1: # BB#0: # %entry
+; AVX1-NEXT: vblendpd {{.*#+}} ymm0 = ymm0[0],ymm1[1,2,3]
+; AVX1-NEXT: vperm2f128 {{.*#+}} ymm1 = ymm0[2,3,0,1]
+; AVX1-NEXT: vshufps {{.*#+}} ymm0 = ymm0[1,0],ymm1[3,2],ymm0[5,4],ymm1[7,6]
+; AVX1-NEXT: retq
+;
+; AVX2-LABEL: PR22412:
+; AVX2: # BB#0: # %entry
+; AVX2-NEXT: vblendpd {{.*#+}} ymm0 = ymm0[0],ymm1[1,2,3]
+; AVX2-NEXT: vmovaps {{.*#+}} ymm1 = [1,0,7,6,5,4,3,2]
+; AVX2-NEXT: vpermps %ymm0, %ymm1, %ymm0
+; AVX2-NEXT: retq
+entry:
+ %s1 = shufflevector <8 x float> %a, <8 x float> %b, <8 x i32> <i32 0, i32 1, i32 10, i32 11, i32 12, i32 13, i32 14, i32 15>
+ %s2 = shufflevector <8 x float> %s1, <8 x float> undef, <8 x i32> <i32 1, i32 0, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2>
+ ret <8 x float> %s2
+}
projects / oota-llvm.git / blobdiff