1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py 2; RUN: opt -loop-vectorize -mtriple=s390x-ibm-linux -mcpu=z13 -force-vector-width=2 -S %s | FileCheck %s 3 4; Test case from PR44020. 5 6; In func_21, %rec forms a first order recurrence and we predicate to avoid 7; scalar iteration overhead for a low trip count loop. Make sure we pick 8; the correct insertion point when fixing first order recurrences. 9 10@A = external dso_local global [5 x i32], align 4 11@B = external dso_local global [5 x i32], align 4 12 13define void @func_21() { 14; CHECK-LABEL: @func_21( 15; CHECK-NEXT: entry: 16; CHECK-NEXT: br i1 false, label [[SCALAR_PH:%.*]], label [[VECTOR_PH:%.*]] 17; CHECK: vector.ph: 18; CHECK-NEXT: br label [[VECTOR_BODY:%.*]] 19; CHECK: vector.body: 20; CHECK-NEXT: [[INDEX:%.*]] = phi i64 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[PRED_STORE_CONTINUE4:%.*]] ] 21; CHECK-NEXT: [[VECTOR_RECUR:%.*]] = phi <2 x i32> [ <i32 undef, i32 0>, [[VECTOR_PH]] ], [ [[TMP12:%.*]], [[PRED_STORE_CONTINUE4]] ] 22; CHECK-NEXT: [[BROADCAST_SPLATINSERT:%.*]] = insertelement <2 x i64> undef, i64 [[INDEX]], i32 0 23; CHECK-NEXT: [[BROADCAST_SPLAT:%.*]] = shufflevector <2 x i64> [[BROADCAST_SPLATINSERT]], <2 x i64> undef, <2 x i32> zeroinitializer 24; CHECK-NEXT: [[INDUCTION:%.*]] = add <2 x i64> [[BROADCAST_SPLAT]], <i64 0, i64 1> 25; CHECK-NEXT: [[TMP0:%.*]] = add i64 [[INDEX]], 0 26; CHECK-NEXT: [[TMP1:%.*]] = add i64 [[INDEX]], 1 27; CHECK-NEXT: [[TMP2:%.*]] = icmp ule <2 x i64> [[INDUCTION]], <i64 4, i64 4> 28; CHECK-NEXT: [[TMP3:%.*]] = extractelement <2 x i1> [[TMP2]], i32 0 29; CHECK-NEXT: br i1 [[TMP3]], label [[PRED_LOAD_IF:%.*]], label [[PRED_LOAD_CONTINUE:%.*]] 30; CHECK: pred.load.if: 31; CHECK-NEXT: [[TMP4:%.*]] = getelementptr inbounds [5 x i32], [5 x i32]* @A, i64 0, i64 [[TMP0]] 32; CHECK-NEXT: [[TMP5:%.*]] = load i32, i32* [[TMP4]], align 4 33; CHECK-NEXT: [[TMP6:%.*]] = insertelement <2 x i32> undef, i32 [[TMP5]], i32 0 34; CHECK-NEXT: br label [[PRED_LOAD_CONTINUE]] 35; CHECK: pred.load.continue: 36; CHECK-NEXT: [[TMP7:%.*]] = phi <2 x i32> [ undef, [[VECTOR_BODY]] ], [ [[TMP6]], [[PRED_LOAD_IF]] ] 37; CHECK-NEXT: [[TMP8:%.*]] = extractelement <2 x i1> [[TMP2]], i32 1 38; CHECK-NEXT: br i1 [[TMP8]], label [[PRED_LOAD_IF1:%.*]], label [[PRED_LOAD_CONTINUE2:%.*]] 39; CHECK: pred.load.if1: 40; CHECK-NEXT: [[TMP9:%.*]] = getelementptr inbounds [5 x i32], [5 x i32]* @A, i64 0, i64 [[TMP1]] 41; CHECK-NEXT: [[TMP10:%.*]] = load i32, i32* [[TMP9]], align 4 42; CHECK-NEXT: [[TMP11:%.*]] = insertelement <2 x i32> [[TMP7]], i32 [[TMP10]], i32 1 43; CHECK-NEXT: br label [[PRED_LOAD_CONTINUE2]] 44; CHECK: pred.load.continue2: 45; CHECK-NEXT: [[TMP12]] = phi <2 x i32> [ [[TMP7]], [[PRED_LOAD_CONTINUE]] ], [ [[TMP11]], [[PRED_LOAD_IF1]] ] 46; CHECK-NEXT: [[TMP13:%.*]] = shufflevector <2 x i32> [[VECTOR_RECUR]], <2 x i32> [[TMP12]], <2 x i32> <i32 1, i32 2> 47; CHECK-NEXT: [[TMP14:%.*]] = extractelement <2 x i1> [[TMP2]], i32 0 48; CHECK-NEXT: br i1 [[TMP14]], label [[PRED_STORE_IF:%.*]], label [[PRED_STORE_CONTINUE:%.*]] 49; CHECK: pred.store.if: 50; CHECK-NEXT: [[TMP15:%.*]] = getelementptr inbounds [5 x i32], [5 x i32]* @B, i64 0, i64 [[TMP0]] 51; CHECK-NEXT: [[TMP16:%.*]] = extractelement <2 x i32> [[TMP13]], i32 0 52; CHECK-NEXT: store i32 [[TMP16]], i32* [[TMP15]], align 4 53; CHECK-NEXT: br label [[PRED_STORE_CONTINUE]] 54; CHECK: pred.store.continue: 55; CHECK-NEXT: [[TMP17:%.*]] = extractelement <2 x i1> [[TMP2]], i32 1 56; CHECK-NEXT: br i1 [[TMP17]], label [[PRED_STORE_IF3:%.*]], label [[PRED_STORE_CONTINUE4]] 57; CHECK: pred.store.if3: 58; CHECK-NEXT: [[TMP18:%.*]] = getelementptr inbounds [5 x i32], [5 x i32]* @B, i64 0, i64 [[TMP1]] 59; CHECK-NEXT: [[TMP19:%.*]] = extractelement <2 x i32> [[TMP13]], i32 1 60; CHECK-NEXT: store i32 [[TMP19]], i32* [[TMP18]], align 4 61; CHECK-NEXT: br label [[PRED_STORE_CONTINUE4]] 62; CHECK: pred.store.continue4: 63; CHECK-NEXT: [[INDEX_NEXT]] = add i64 [[INDEX]], 2 64; CHECK-NEXT: [[TMP20:%.*]] = icmp eq i64 [[INDEX_NEXT]], 6 65; CHECK-NEXT: br i1 [[TMP20]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop !0 66; CHECK: middle.block: 67; CHECK-NEXT: [[VECTOR_RECUR_EXTRACT:%.*]] = extractelement <2 x i32> [[TMP12]], i32 1 68; CHECK-NEXT: [[VECTOR_RECUR_EXTRACT_FOR_PHI:%.*]] = extractelement <2 x i32> [[TMP12]], i32 0 69; CHECK-NEXT: br i1 true, label [[EXIT:%.*]], label [[SCALAR_PH]] 70; CHECK: scalar.ph: 71; CHECK-NEXT: [[SCALAR_RECUR_INIT:%.*]] = phi i32 [ [[VECTOR_RECUR_EXTRACT]], [[MIDDLE_BLOCK]] ], [ 0, [[ENTRY:%.*]] ] 72; CHECK-NEXT: [[BC_RESUME_VAL:%.*]] = phi i64 [ 6, [[MIDDLE_BLOCK]] ], [ 0, [[ENTRY]] ] 73; CHECK-NEXT: br label [[LOOP:%.*]] 74; CHECK: loop: 75; CHECK-NEXT: [[SCALAR_RECUR:%.*]] = phi i32 [ [[SCALAR_RECUR_INIT]], [[SCALAR_PH]] ], [ [[LV:%.*]], [[LOOP]] ] 76; CHECK-NEXT: [[INDVARS_IV:%.*]] = phi i64 [ [[BC_RESUME_VAL]], [[SCALAR_PH]] ], [ [[INDVARS_IV_NEXT:%.*]], [[LOOP]] ] 77; CHECK-NEXT: [[A_PTR:%.*]] = getelementptr inbounds [5 x i32], [5 x i32]* @A, i64 0, i64 [[INDVARS_IV]] 78; CHECK-NEXT: [[LV]] = load i32, i32* [[A_PTR]], align 4 79; CHECK-NEXT: [[B_PTR:%.*]] = getelementptr inbounds [5 x i32], [5 x i32]* @B, i64 0, i64 [[INDVARS_IV]] 80; CHECK-NEXT: store i32 [[SCALAR_RECUR]], i32* [[B_PTR]], align 4 81; CHECK-NEXT: [[INDVARS_IV_NEXT]] = add nuw nsw i64 [[INDVARS_IV]], 1 82; CHECK-NEXT: [[EXITCOND:%.*]] = icmp eq i64 [[INDVARS_IV_NEXT]], 5 83; CHECK-NEXT: br i1 [[EXITCOND]], label [[EXIT]], label [[LOOP]], !llvm.loop !2 84; CHECK: exit: 85; CHECK-NEXT: ret void 86; 87entry: 88 br label %loop 89 90loop: ; preds = %loop, %entry 91 %rec = phi i32 [ 0, %entry], [ %lv, %loop ] 92 %indvars.iv = phi i64 [ 0, %entry], [ %indvars.iv.next, %loop ] 93 %A.ptr= getelementptr inbounds [5 x i32], [5 x i32]* @A, i64 0, i64 %indvars.iv 94 %lv = load i32, i32* %A.ptr, align 4 95 %B.ptr = getelementptr inbounds [5 x i32], [5 x i32]* @B, i64 0, i64 %indvars.iv 96 store i32 %rec, i32* %B.ptr, align 4 97 %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1 98 %exitcond = icmp eq i64 %indvars.iv.next, 5 99 br i1 %exitcond, label %exit, label %loop 100 101exit: ; preds = %loop 102 ret void 103} 104