diff options
| -rw-r--r-- | llvm/lib/Target/X86/X86ISelLowering.cpp | 4 | ||||
| -rw-r--r-- | llvm/test/CodeGen/X86/vector-shuffle-128-v16.ll | 4 |
2 files changed, 4 insertions, 4 deletions
diff --git a/llvm/lib/Target/X86/X86ISelLowering.cpp b/llvm/lib/Target/X86/X86ISelLowering.cpp index 5ae752c1da5..94c19fb4c40 100644 --- a/llvm/lib/Target/X86/X86ISelLowering.cpp +++ b/llvm/lib/Target/X86/X86ISelLowering.cpp @@ -7931,6 +7931,10 @@ static SDValue lowerV16I8VectorShuffle(SDValue Op, SDValue V1, SDValue V2, } V1 = DAG.getNode(X86ISD::PSHUFB, DL, MVT::v16i8, V1, DAG.getNode(ISD::BUILD_VECTOR, DL, MVT::v16i8, V1Mask)); + if (isSingleInputShuffleMask(Mask)) + return V1; // Single inputs are easy. + + // Otherwise, blend the two. V2 = DAG.getNode(X86ISD::PSHUFB, DL, MVT::v16i8, V2, DAG.getNode(ISD::BUILD_VECTOR, DL, MVT::v16i8, V2Mask)); return DAG.getNode(ISD::OR, DL, MVT::v16i8, V1, V2); diff --git a/llvm/test/CodeGen/X86/vector-shuffle-128-v16.ll b/llvm/test/CodeGen/X86/vector-shuffle-128-v16.ll index 49620e93d6f..693a2764d43 100644 --- a/llvm/test/CodeGen/X86/vector-shuffle-128-v16.ll +++ b/llvm/test/CodeGen/X86/vector-shuffle-128-v16.ll @@ -179,9 +179,7 @@ define <16 x i8> @shuffle_v16i8_03_02_01_00_07_06_05_04_11_10_09_08_15_14_13_12( ; ; SSSE3-LABEL: @shuffle_v16i8_03_02_01_00_07_06_05_04_11_10_09_08_15_14_13_12 ; SSSE3: # BB#0: -; SSSE3-NEXT: pshufb {{.*}} # xmm1 = zero,zero,zero,zero,zero,zero,zero,zero,zero,zero,zero,zero,zero,zero,zero,zero ; SSSE3-NEXT: pshufb {{.*}} # xmm0 = xmm0[3,2,1,0,7,6,5,4,11,10,9,8,15,14,13,12] -; SSSE3-NEXT: por %xmm1, %xmm0 ; SSSE3-NEXT: retq %shuffle = shufflevector <16 x i8> %a, <16 x i8> %b, <16 x i32> <i32 3, i32 2, i32 1, i32 0, i32 7, i32 6, i32 5, i32 4, i32 11, i32 10, i32 9, i32 8, i32 15, i32 14, i32 13, i32 12> ret <16 x i8> %shuffle @@ -275,9 +273,7 @@ define <16 x i8> @trunc_v4i32_shuffle(<16 x i8> %a) { ; ; SSSE3-LABEL: @trunc_v4i32_shuffle ; SSSE3: # BB#0: -; SSSE3-NEXT: pshufb {{.*}} # xmm1 = zero,zero,zero,zero,zero,zero,zero,zero,zero,zero,zero,zero,zero,zero,zero,zero ; SSSE3-NEXT: pshufb {{.*}} # xmm0 = xmm0[0,4,8,12],zero,zero,zero,zero,zero,zero,zero,zero,zero,zero,zero,zero -; SSSE3-NEXT: por %xmm1, %xmm0 ; SSSE3-NEXT: retq %shuffle = shufflevector <16 x i8> %a, <16 x i8> undef, <16 x i32> <i32 0, i32 4, i32 8, i32 12, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef> ret <16 x i8> %shuffle |
