1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py 2 3; To test epilogue-vectorization we need to make sure that the vectorizer actually vectorizes the loop. 4; Without a target triple this becomes difficult, unless we force vectorization through user hints. 5; Currently user provided vectorization hints prevent epilogue vectorization unless the forced 6; VF is the same as the epilogue vectorization VF. To make these tests target independent we'll use a 7; trick where both VFs are forced to be the same value. 8; RUN: opt < %s -passes='loop-vectorize' -enable-epilogue-vectorization -force-vector-width=2 -epilogue-vectorization-force-VF=2 -S | FileCheck %s --check-prefix VF-TWO-CHECK 9 10target datalayout = "e-m:e-i64:64-n32:64" 11 12; Some limited forms of live-outs (non-reduction, non-recurrences) are supported. 13define signext i32 @f1(ptr noalias %A, ptr noalias %B, i32 signext %n) { 14; VF-TWO-CHECK-LABEL: @f1( 15; VF-TWO-CHECK-NEXT: entry: 16; VF-TWO-CHECK-NEXT: [[CMP1:%.*]] = icmp sgt i32 [[N:%.*]], 0 17; VF-TWO-CHECK-NEXT: br i1 [[CMP1]], label [[ITER_CHECK:%.*]], label [[FOR_END:%.*]] 18; VF-TWO-CHECK: iter.check: 19; VF-TWO-CHECK-NEXT: [[WIDE_TRIP_COUNT:%.*]] = zext i32 [[N]] to i64 20; VF-TWO-CHECK-NEXT: [[MIN_ITERS_CHECK:%.*]] = icmp ult i64 [[WIDE_TRIP_COUNT]], 2 21; VF-TWO-CHECK-NEXT: br i1 [[MIN_ITERS_CHECK]], label [[VEC_EPILOG_SCALAR_PH:%.*]], label [[VECTOR_MAIN_LOOP_ITER_CHECK:%.*]] 22; VF-TWO-CHECK: vector.main.loop.iter.check: 23; VF-TWO-CHECK-NEXT: [[MIN_ITERS_CHECK1:%.*]] = icmp ult i64 [[WIDE_TRIP_COUNT]], 2 24; VF-TWO-CHECK-NEXT: br i1 [[MIN_ITERS_CHECK1]], label [[VEC_EPILOG_PH:%.*]], label [[VECTOR_PH:%.*]] 25; VF-TWO-CHECK: vector.ph: 26; VF-TWO-CHECK-NEXT: [[N_MOD_VF:%.*]] = urem i64 [[WIDE_TRIP_COUNT]], 2 27; VF-TWO-CHECK-NEXT: [[N_VEC:%.*]] = sub i64 [[WIDE_TRIP_COUNT]], [[N_MOD_VF]] 28; VF-TWO-CHECK-NEXT: br label [[VECTOR_BODY:%.*]] 29; VF-TWO-CHECK: vector.body: 30; VF-TWO-CHECK-NEXT: [[INDEX:%.*]] = phi i64 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ] 31; VF-TWO-CHECK-NEXT: [[TMP0:%.*]] = add i64 [[INDEX]], 0 32; VF-TWO-CHECK-NEXT: [[TMP1:%.*]] = getelementptr inbounds i32, ptr [[A:%.*]], i64 [[TMP0]] 33; VF-TWO-CHECK-NEXT: [[TMP2:%.*]] = getelementptr inbounds i32, ptr [[TMP1]], i32 0 34; VF-TWO-CHECK-NEXT: [[WIDE_LOAD:%.*]] = load <2 x i32>, ptr [[TMP2]], align 4 35; VF-TWO-CHECK-NEXT: [[TMP3:%.*]] = getelementptr inbounds i32, ptr [[B:%.*]], i64 [[TMP0]] 36; VF-TWO-CHECK-NEXT: [[TMP4:%.*]] = getelementptr inbounds i32, ptr [[TMP3]], i32 0 37; VF-TWO-CHECK-NEXT: [[WIDE_LOAD2:%.*]] = load <2 x i32>, ptr [[TMP4]], align 4 38; VF-TWO-CHECK-NEXT: [[TMP5:%.*]] = add nsw <2 x i32> [[WIDE_LOAD]], [[WIDE_LOAD2]] 39; VF-TWO-CHECK-NEXT: [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 2 40; VF-TWO-CHECK-NEXT: [[TMP6:%.*]] = icmp eq i64 [[INDEX_NEXT]], [[N_VEC]] 41; VF-TWO-CHECK-NEXT: br i1 [[TMP6]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP0:![0-9]+]] 42; VF-TWO-CHECK: middle.block: 43; VF-TWO-CHECK-NEXT: [[TMP7:%.*]] = extractelement <2 x i32> [[TMP5]], i32 1 44; VF-TWO-CHECK-NEXT: [[CMP_N:%.*]] = icmp eq i64 [[WIDE_TRIP_COUNT]], [[N_VEC]] 45; VF-TWO-CHECK-NEXT: br i1 [[CMP_N]], label [[FOR_END_LOOPEXIT:%.*]], label [[VEC_EPILOG_ITER_CHECK:%.*]] 46; VF-TWO-CHECK: vec.epilog.iter.check: 47; VF-TWO-CHECK-NEXT: [[N_VEC_REMAINING:%.*]] = sub i64 [[WIDE_TRIP_COUNT]], [[N_VEC]] 48; VF-TWO-CHECK-NEXT: [[MIN_EPILOG_ITERS_CHECK:%.*]] = icmp ult i64 [[N_VEC_REMAINING]], 2 49; VF-TWO-CHECK-NEXT: br i1 [[MIN_EPILOG_ITERS_CHECK]], label [[VEC_EPILOG_SCALAR_PH]], label [[VEC_EPILOG_PH]] 50; VF-TWO-CHECK: vec.epilog.ph: 51; VF-TWO-CHECK-NEXT: [[VEC_EPILOG_RESUME_VAL:%.*]] = phi i64 [ [[N_VEC]], [[VEC_EPILOG_ITER_CHECK]] ], [ 0, [[VECTOR_MAIN_LOOP_ITER_CHECK]] ] 52; VF-TWO-CHECK-NEXT: [[N_MOD_VF3:%.*]] = urem i64 [[WIDE_TRIP_COUNT]], 2 53; VF-TWO-CHECK-NEXT: [[N_VEC4:%.*]] = sub i64 [[WIDE_TRIP_COUNT]], [[N_MOD_VF3]] 54; VF-TWO-CHECK-NEXT: br label [[VEC_EPILOG_VECTOR_BODY:%.*]] 55; VF-TWO-CHECK: vec.epilog.vector.body: 56; VF-TWO-CHECK-NEXT: [[INDEX6:%.*]] = phi i64 [ [[VEC_EPILOG_RESUME_VAL]], [[VEC_EPILOG_PH]] ], [ [[INDEX_NEXT9:%.*]], [[VEC_EPILOG_VECTOR_BODY]] ] 57; VF-TWO-CHECK-NEXT: [[TMP8:%.*]] = add i64 [[INDEX6]], 0 58; VF-TWO-CHECK-NEXT: [[TMP9:%.*]] = getelementptr inbounds i32, ptr [[A]], i64 [[TMP8]] 59; VF-TWO-CHECK-NEXT: [[TMP10:%.*]] = getelementptr inbounds i32, ptr [[TMP9]], i32 0 60; VF-TWO-CHECK-NEXT: [[WIDE_LOAD7:%.*]] = load <2 x i32>, ptr [[TMP10]], align 4 61; VF-TWO-CHECK-NEXT: [[TMP11:%.*]] = getelementptr inbounds i32, ptr [[B]], i64 [[TMP8]] 62; VF-TWO-CHECK-NEXT: [[TMP12:%.*]] = getelementptr inbounds i32, ptr [[TMP11]], i32 0 63; VF-TWO-CHECK-NEXT: [[WIDE_LOAD8:%.*]] = load <2 x i32>, ptr [[TMP12]], align 4 64; VF-TWO-CHECK-NEXT: [[TMP13:%.*]] = add nsw <2 x i32> [[WIDE_LOAD7]], [[WIDE_LOAD8]] 65; VF-TWO-CHECK-NEXT: [[INDEX_NEXT9]] = add nuw i64 [[INDEX6]], 2 66; VF-TWO-CHECK-NEXT: [[TMP14:%.*]] = icmp eq i64 [[INDEX_NEXT9]], [[N_VEC4]] 67; VF-TWO-CHECK-NEXT: br i1 [[TMP14]], label [[VEC_EPILOG_MIDDLE_BLOCK:%.*]], label [[VEC_EPILOG_VECTOR_BODY]], !llvm.loop [[LOOP3:![0-9]+]] 68; VF-TWO-CHECK: vec.epilog.middle.block: 69; VF-TWO-CHECK-NEXT: [[TMP15:%.*]] = extractelement <2 x i32> [[TMP13]], i32 1 70; VF-TWO-CHECK-NEXT: [[CMP_N5:%.*]] = icmp eq i64 [[WIDE_TRIP_COUNT]], [[N_VEC4]] 71; VF-TWO-CHECK-NEXT: br i1 [[CMP_N5]], label [[FOR_END_LOOPEXIT]], label [[VEC_EPILOG_SCALAR_PH]] 72; VF-TWO-CHECK: vec.epilog.scalar.ph: 73; VF-TWO-CHECK-NEXT: [[BC_RESUME_VAL:%.*]] = phi i64 [ [[N_VEC4]], [[VEC_EPILOG_MIDDLE_BLOCK]] ], [ 0, [[ITER_CHECK]] ], [ [[N_VEC]], [[VEC_EPILOG_ITER_CHECK]] ] 74; VF-TWO-CHECK-NEXT: br label [[FOR_BODY:%.*]] 75; VF-TWO-CHECK: for.body: 76; VF-TWO-CHECK-NEXT: [[INDVARS_IV:%.*]] = phi i64 [ [[BC_RESUME_VAL]], [[VEC_EPILOG_SCALAR_PH]] ], [ [[INDVARS_IV_NEXT:%.*]], [[FOR_BODY]] ] 77; VF-TWO-CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i32, ptr [[A]], i64 [[INDVARS_IV]] 78; VF-TWO-CHECK-NEXT: [[TMP16:%.*]] = load i32, ptr [[ARRAYIDX]], align 4 79; VF-TWO-CHECK-NEXT: [[ARRAYIDX2:%.*]] = getelementptr inbounds i32, ptr [[B]], i64 [[INDVARS_IV]] 80; VF-TWO-CHECK-NEXT: [[TMP17:%.*]] = load i32, ptr [[ARRAYIDX2]], align 4 81; VF-TWO-CHECK-NEXT: [[ADD:%.*]] = add nsw i32 [[TMP16]], [[TMP17]] 82; VF-TWO-CHECK-NEXT: [[INDVARS_IV_NEXT]] = add nuw nsw i64 [[INDVARS_IV]], 1 83; VF-TWO-CHECK-NEXT: [[EXITCOND:%.*]] = icmp ne i64 [[INDVARS_IV_NEXT]], [[WIDE_TRIP_COUNT]] 84; VF-TWO-CHECK-NEXT: br i1 [[EXITCOND]], label [[FOR_BODY]], label [[FOR_END_LOOPEXIT]], !llvm.loop [[LOOP4:![0-9]+]] 85; VF-TWO-CHECK: for.end.loopexit: 86; VF-TWO-CHECK-NEXT: [[ADD_LCSSA:%.*]] = phi i32 [ [[ADD]], [[FOR_BODY]] ], [ [[TMP7]], [[MIDDLE_BLOCK]] ], [ [[TMP15]], [[VEC_EPILOG_MIDDLE_BLOCK]] ] 87; VF-TWO-CHECK-NEXT: br label [[FOR_END]] 88; VF-TWO-CHECK: for.end: 89; VF-TWO-CHECK-NEXT: [[RES_0_LCSSA:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[ADD_LCSSA]], [[FOR_END_LOOPEXIT]] ] 90; VF-TWO-CHECK-NEXT: ret i32 [[RES_0_LCSSA]] 91; 92entry: 93 %cmp1 = icmp sgt i32 %n, 0 94 br i1 %cmp1, label %for.body.preheader, label %for.end 95 96for.body.preheader: ; preds = %entry 97 %wide.trip.count = zext i32 %n to i64 98 br label %for.body 99 100for.body: ; preds = %for.body.preheader, %for.body 101 %indvars.iv = phi i64 [ 0, %for.body.preheader ], [ %indvars.iv.next, %for.body ] 102 %arrayidx = getelementptr inbounds i32, ptr %A, i64 %indvars.iv 103 %0 = load i32, ptr %arrayidx, align 4 104 %arrayidx2 = getelementptr inbounds i32, ptr %B, i64 %indvars.iv 105 %1 = load i32, ptr %arrayidx2, align 4 106 %add = add nsw i32 %0, %1 107 %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1 108 %exitcond = icmp ne i64 %indvars.iv.next, %wide.trip.count 109 br i1 %exitcond, label %for.body, label %for.end.loopexit 110 111for.end.loopexit: ; preds = %for.body 112 %add.lcssa = phi i32 [ %add, %for.body ] 113 br label %for.end 114 115for.end: ; preds = %for.end.loopexit, %entry 116 %res.0.lcssa = phi i32 [ 0, %entry ], [ %add.lcssa, %for.end.loopexit ] 117 ret i32 %res.0.lcssa 118} 119