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1; RUN: opt < %s -passes=loop-vectorize -prefer-predicate-over-epilogue=predicate-else-scalar-epilogue \2; RUN: -mtriple aarch64-unknown-linux-gnu -mattr=+sve -S | FileCheck %s3 4define void @invariant_store_red_exit_is_phi(ptr %dst, ptr readonly %src, i64 %n) {5; CHECK-LABEL: @invariant_store_red_exit_is_phi(6; CHECK: vector.ph:7; CHECK: %[[N_MINUS_VF:.*]] = sub i64 %n, %[[VSCALE_X_4:.*]]8; CHECK: %[[CMP:.*]] = icmp ugt i64 %n, %[[VSCALE_X_4]]9; CHECK: %[[N2:.*]] = select i1 %[[CMP]], i64 %[[N_MINUS_VF]], i64 010; CHECK: %[[ACTIVE_LANE_MASK_ENTRY:.*]] = call <vscale x 4 x i1> @llvm.get.active.lane.mask.nxv4i1.i64(i64 0, i64 %n)11; CHECK: vector.body:12; CHECK: %[[ACTIVE_LANE_MASK:.*]] = phi <vscale x 4 x i1> [ %[[ACTIVE_LANE_MASK_ENTRY]], %vector.ph ], [ %[[ACTIVE_LANE_MASK_NEXT:.*]], %vector.body ]13; CHECK: %[[VEC_PHI:.*]] = phi <vscale x 4 x i32> [ zeroinitializer, %vector.ph ], [ %[[PREDPHI:.*]], %vector.body ]14; CHECK: %[[LOAD:.*]] = call <vscale x 4 x i32> @llvm.masked.load.nxv4i32.p015; CHECK-NEXT: %[[ADD:.*]] = add <vscale x 4 x i32> %[[VEC_PHI]], %[[LOAD]]16; CHECK-NEXT: %[[SELECT:.*]] = select <vscale x 4 x i1> %[[ACTIVE_LANE_MASK]], <vscale x 4 x i32> %[[ADD]], <vscale x 4 x i32> %[[VEC_PHI]]17; CHECK: %[[ACTIVE_LANE_MASK_NEXT]] = call <vscale x 4 x i1> @llvm.get.active.lane.mask.nxv4i1.i64(i64 %{{.*}}, i64 %[[N2]])18; CHECK: middle.block:19; CHECK-NEXT: %[[SUM:.*]] = call i32 @llvm.vector.reduce.add.nxv4i32(<vscale x 4 x i32> %[[SELECT]])20; CHECK-NEXT: store i32 %[[SUM]], ptr %dst, align 421entry:22 br label %for.body23 24for.body: ; preds = %entry, %for.inc25 %red = phi i32 [ 0, %entry ], [ %storemerge, %for.body ]26 %indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]27 %arrayidx6 = getelementptr inbounds i32, ptr %src, i64 %indvars.iv28 %load = load i32, ptr %arrayidx6, align 429 %storemerge = add i32 %red, %load30 store i32 %storemerge, ptr %dst, align 431 %indvars.iv.next = add nsw i64 %indvars.iv, 132 %exitcond.not = icmp eq i64 %indvars.iv.next, %n33 br i1 %exitcond.not, label %for.end.loopexit, label %for.body, !llvm.loop !034 35for.end.loopexit: ; preds = %for.inc36 br label %for.end37 38for.end: ; preds = %for.end.loopexit39 ret void40}41 42!0 = distinct !{!0, !1, !2, !3, !4}43!1 = !{!"llvm.loop.vectorize.width", i32 4}44!2 = !{!"llvm.loop.vectorize.scalable.enable", i1 true}45!3 = !{!"llvm.loop.interleave.count", i32 1}46!4 = !{!"llvm.loop.vectorize.enable", i1 true}47