diff options
| -rw-r--r-- | llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp | 6 | ||||
| -rw-r--r-- | llvm/test/CodeGen/X86/vector-shuffle-256-v16.ll | 13 |
2 files changed, 10 insertions, 9 deletions
diff --git a/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp b/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp index 6cefa820c20..9ac600bad72 100644 --- a/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp +++ b/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp @@ -3750,6 +3750,12 @@ SDValue SelectionDAG::getNode(unsigned Opcode, const SDLoc &DL, EVT VT, // Trivial extraction. if (VT.getSimpleVT() == N1.getSimpleValueType()) return N1; + + // EXTRACT_SUBVECTOR of INSERT_SUBVECTOR is often created + // during shuffle legalization. + if (N1.getOpcode() == ISD::INSERT_SUBVECTOR && N2 == N1.getOperand(2) && + VT == N1.getOperand(1).getValueType()) + return N1.getOperand(1); } break; } diff --git a/llvm/test/CodeGen/X86/vector-shuffle-256-v16.ll b/llvm/test/CodeGen/X86/vector-shuffle-256-v16.ll index 29715e07a81..cea1fb9098d 100644 --- a/llvm/test/CodeGen/X86/vector-shuffle-256-v16.ll +++ b/llvm/test/CodeGen/X86/vector-shuffle-256-v16.ll @@ -3500,8 +3500,7 @@ define <16 x i16> @insert_dup_mem_v16i16_i32(i32* %ptr) { ; AVX1-LABEL: insert_dup_mem_v16i16_i32: ; AVX1: # BB#0: ; AVX1-NEXT: vmovd {{.*#+}} xmm0 = mem[0],zero,zero,zero -; AVX1-NEXT: vpshuflw {{.*#+}} xmm0 = xmm0[0,0,0,0,4,5,6,7] -; AVX1-NEXT: vpshufd {{.*#+}} xmm0 = xmm0[0,0,1,1] +; AVX1-NEXT: vpshufb {{.*#+}} xmm0 = xmm0[0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1] ; AVX1-NEXT: vinsertf128 $1, %xmm0, %ymm0, %ymm0 ; AVX1-NEXT: retq ; @@ -3521,8 +3520,7 @@ define <16 x i16> @insert_dup_mem_v16i16_sext_i16(i16* %ptr) { ; AVX1: # BB#0: ; AVX1-NEXT: movswl (%rdi), %eax ; AVX1-NEXT: vmovd %eax, %xmm0 -; AVX1-NEXT: vpshuflw {{.*#+}} xmm0 = xmm0[0,0,0,0,4,5,6,7] -; AVX1-NEXT: vpshufd {{.*#+}} xmm0 = xmm0[0,0,1,1] +; AVX1-NEXT: vpshufb {{.*#+}} xmm0 = xmm0[0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1] ; AVX1-NEXT: vinsertf128 $1, %xmm0, %ymm0, %ymm0 ; AVX1-NEXT: retq ; @@ -3544,8 +3542,7 @@ define <16 x i16> @insert_dup_elt1_mem_v16i16_i32(i32* %ptr) #0 { ; AVX1-LABEL: insert_dup_elt1_mem_v16i16_i32: ; AVX1: # BB#0: ; AVX1-NEXT: vmovd {{.*#+}} xmm0 = mem[0],zero,zero,zero -; AVX1-NEXT: vpshuflw {{.*#+}} xmm0 = xmm0[1,1,1,1,4,5,6,7] -; AVX1-NEXT: vpshufd {{.*#+}} xmm0 = xmm0[0,0,1,1] +; AVX1-NEXT: vpshufb {{.*#+}} xmm0 = xmm0[2,3,2,3,2,3,2,3,2,3,2,3,2,3,2,3] ; AVX1-NEXT: vinsertf128 $1, %xmm0, %ymm0, %ymm0 ; AVX1-NEXT: retq ; @@ -3564,9 +3561,7 @@ define <16 x i16> @insert_dup_elt3_mem_v16i16_i32(i32* %ptr) #0 { ; AVX1-LABEL: insert_dup_elt3_mem_v16i16_i32: ; AVX1: # BB#0: ; AVX1-NEXT: vmovd {{.*#+}} xmm0 = mem[0],zero,zero,zero -; AVX1-NEXT: vpshufd {{.*#+}} xmm0 = xmm0[1,0,1,1] -; AVX1-NEXT: vpshuflw {{.*#+}} xmm0 = xmm0[3,3,3,3,4,5,6,7] -; AVX1-NEXT: vpshufd {{.*#+}} xmm0 = xmm0[0,0,1,1] +; AVX1-NEXT: vpshufb {{.*#+}} xmm0 = xmm0[2,3,2,3,2,3,2,3,2,3,2,3,2,3,2,3] ; AVX1-NEXT: vinsertf128 $1, %xmm0, %ymm0, %ymm0 ; AVX1-NEXT: retq ; |
